321 Studios Gas Grill P777 User Manual

P777

Handbook Multichannel power ampliﬁer

MULTICHANNEL POWER AMPLIFIER

Warning

Mains plug/appliance coupler is used to disconnect

device and it shall remain readily operable.

CAUTION

RISK OF ELECTRIC

SHOCK DO NOT OPEN

ATTENTION

RISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR

CAUTION: To reduce the risk of electric shock, do not remove cover (or back). No user serviceable parts inside. Refer

servicing to qualiﬁed service personnel.

WARNING: To reduce the risk of ﬁre or electric shock, do not expose this apparatus to rain or moisture.

CLASS I construction shall be connected to a MAINS

socket outlet with a protective earthing connection.

safety

guidelines

Do not defeat the safety purpose of the polarized or

grounding-type plug. A polarized plug has two blades

with one wider than the other. A grounding type plug

has two blades and a third grounding prong. e wide

blade or the third prong are provided for your safety. If

the provided plug does not ﬁt into your outlet, consult an

electrician for replacement of the obsolete outlet.

e lightning ﬂash with an arrowhead symbol within an equilateral triangle, is intended to alert the user to the

presence of uninsulated ‘dangerous voltage’ within the product’s enclosure that may be of suﬃcient magnitude to

constitute a risk of electric shock to persons.

e exclamation point within an equilateral triangle is intended to alert the user to the presence of important

operating and maintenance (servicing) instructions in the literature accompanying the product.

CAUTION: In Canada and the USA, to prevent electric shock, match the wide blade of the plug to the wide slot in the

socket and insert the plug fully into the socket.

Many of these items are common sense precautions but, for your own safety and to ensure that you do not damage the unit, you must read them.

5. Ventilation

10. Power sources

15. Damage requiring service

e equipment should be serviced by qualiﬁed service

personnel when:

A. the power-supply cord or the plug has been

damaged, or

B. objects have fallen, or liquid has spilled into the

equipment, or

Important safety instructions

Do not place the equipment on a bed, sofa, rug or

similar soﬅ surface, or in an enclosed bookcase or

cabinet, since ventilation may be impeded.

Only connect the equipment to a power supply of

the type described in the operating instructions or as

marked on the equipment.

is product is designed and manufactured to meet

strict quality and safety standards. However, you should

be aware of the following installation and operation

precautions.

Keep a minimum of 5cm (2 inches) clear around the

apparatus to allow suﬃcient passage of air.

e primary method of isolating the equipment from

the mains supply is to remove the mains plug. e

equipment must be installed in a manner that makes

disconnection possible.

1. Follow all instructions

6. Heat

You should read all the safety and operating instructions

before operating this equipment. Retain this handbook

for future reference and adhere to all warnings in the

handbook or on the equipment.

C. the equipment has been exposed to rain, or

Locate the equipment away from naked ﬂames or heat-

producing appliances such as radiators, stoves or other

appliances that produce heat.

11. Power-cord protection

D. the equipment does not appear to operate

normally or exhibits a marked change in

performance, or

E. the equipment has been dropped or the enclosure

damaged.

Power supply cords should be routed so that they are not

likely to be walked on or pinched by items placed upon

or against them. Pay particular attention to the point

where they exit from the equipment.

7. Climate

2. Water and moisture

e equipment has been designed for use in moderate

climates and in domestic situations. Unplug this

equipment during lightning storms to prevent possible

damage from a strike or mains surge.

e presence of electricity near water can be dangerous.

Do not use the equipment near water – for example next

to a bathtub, washbowl, kitchen sink, in a wet basement

or near a swimming pool, etc.

12. Non-use periods

Safety compliance

is equipment has been designed to meet the IEC/EN

60065 international electrical safety standard.

is device complies with Part 15 of the FCC Rules.

Operation is subject to the following two conditions:

(1) is device may not cause harmful interference, and

(2) this device must accept any interference received,

including interference that may cause undesired

operation.

If the equipment is not being used for an extended

period, we recommend that you unplug the power cord

of the equipment from the outlet, to save power.

8. Cleaning

3. Object or liquid entry

Unplug the unit from the mains supply before cleaning.

Take care that objects do not fall and liquids are not

spilled into the enclosure through any openings. Liquid-

ﬁlled objects such as vases should not be placed on the

equipment.

13. Abnormal smell

e case should normally only require a wipe with a soﬅ,

lint-free cloth. Do not use chemical solvents for cleaning.

If an abnormal smell or smoke is detected from the

equipment, turn the power oﬀ immediately and unplug

the equipment from the wall outlet. Contact your dealer

and do not reconnect the equipment.

We do not advise the use of furniture cleaning sprays or

polishes as they can cause permanent white marks.

4. Liﬅing and placing the equipment

is ampliﬁer weighs 37.2kg, so take extreme care when

liﬅing or moving this unit. We recommend that two

people are available to liﬅ this unit.

9. Grounding

Ensure that the unit is grounded (‘earthed’) properly at

all times

14. Servicing

You should not attempt to service the equipment.

Contact your dealer to arrange servicing.

Only use a rack or shelf that is stable and strong enough

to support the weight of this equipment.

E-2

ank you and congratulations for purchasing your Arcam FMJ P777 Multichannel power

ampliﬁer.

Contents

safety guidelines.......................................E-2

Arcam has been producing specialist audio products of remarkable quality for over three

decades and the P777 is the latest in a long line of award winning HiFi equipment. e design

of the FMJ range draws upon all of Arcam’s experience as one of the UK’s most respected audio

companies and is built to give you years of trouble-free listening enjoyment.

Important safety instructions........................... E-2

Safety complianc e ................................................ E-2

welcome......................................................E-3

installation .................................................E-4

welcome

Overvie w .................................................................. E-4

Placing the unit ..................................................... E-4

Room acoustics...................................................... E-4

12V Trigger input .................................................. E-4

Power......................................................................... E-4

Connecting to a pre-ampliﬁer ......................... E-4

Interconnect cables.............................................. E-5

is handbook has been designed to give you all the information you need to install, connect

and use the Arcam P777. It may be that the P777 has been installed and set up as part of your

Hi-Fi or home cinema installation by a qualiﬁed Arcam dealer. In this case, you may wish to

skip the sections of this handbook dealing with installation and setting up the unit. Use the

Contents list to guide you to the section of interest.

We hope that your multichannel power ampliﬁer will give you years of trouble-free operation.

In the unlikely event of any fault, or if you simply require further information about Arcam

products, our network of dealers will be happy to help you. Further information can also be

found on the Arcam website at www.arcam.co.uk.

speakers......................................................E-6

Speaker placement .............................................. E-6

Speaker wiring options....................................... E-6

Single wiring........................................................... E-7

Bi-wiring ................................................................... E-7

Bi-amping ................................................................ E-7

e FMJ development team

operatio n ....................................................E-8

Front panel control............................................... E-8

Operating procedure........................................... E-8

trouble-shooting ......................................E-9

Fault status indicators .......................................E-10

speciﬁcation s .......................................... E-11

product guarantee ................................ E-12

MULTICHANNEL POWER AMPLIFIER

E-3

overview

e P777 Multichannel Power Ampliﬁer is built

to Arcam’s traditional high quality design and

manufacturing standards. It is an extremely high-

performance multichannel power ampliﬁer obviously

well suited to multichannel home cinema ampliﬁcation,

although it also provides superb quality stereo

performance with two-channel sources. e P777 is an

ideal partner for the FMJ AV888 Pre-amp Processor.

Each power ampliﬁer module is identical, and is

electrically isolated from the other modules by opto-

isolated circuitry which ensures that each ampliﬁer

module has its own isolated supply. is allows the

ampliﬁer to give excellent channel separation and very

low distortion.

Placing the unit

Power

Place the P777 on a level, ﬁrm surface, avoiding

direct sunlight and sources of heat or damp.

e P777 is supplied with a moulded mains plug already

ﬁtted to the lead. Up to 3kW is drawn at maximum

levels, so a heavy duty IEC mains cable is supplied.

e P777 is a powerful ampliﬁer and a source of

considerable heat output when driven hard. Take

this into consideration when placing the unit.

Check that the plug supplied ﬁts your supply – if your

mains supply voltage or mains plug is diﬀerent, or you

need a new mains lead, please contact your Arcam

dealer.

installation

Do not place the unit in an enclosed space such as

a bookcase or closed cabinet unless there is very

good provision for ventilation.

Do not place any other component or item on top

of the P777 as this may obstruct airﬂow around

the unit, causing the P777 to run hot.

Do not place your record deck on top of this

unit. Record decks are very sensitive to the noise

generated by mains power supplies which will be

heard as a background ‘hum’ if the record deck is

too close.

Push the IEC plug end of the power cable into the socket

on the back of the P777, making sure that it is pushed in

ﬁrmly. Plug the other end of the cable into your mains

socket and, if necessary, switch the socket on.

Connecting to a pre-amplifier

Two diﬀerent connection types are provided for

receiving signals from your pre-ampliﬁer: phono

sockets and XLR connectors. e connection type to use

depends on the set-up that you have.

e P777 also has input and output phono sockets

for the signal being fed to each channel, to allow the

signal to be passed on to additional power ampliﬁers

to drive loudspeakers in other rooms or to bi-amplify

any of the speakers. If the P777 is being used to drive

a ﬁve-channel surround sound system, then the spare

two modules (SBL and SBR) can be used in conjunction

with the main (L and R) modules to bi-amplify suitable

front leﬅ and right speakers.

Room acoustics

If the cables to be used to connect your pre-

ampliﬁer to the P777 are less than 3m long, we

recommend connecting your pre-ampliﬁer to the

AudIo IN phono (RCA) sockets of your P777. To

use the phono connections, make sure that all the

channel input switches are not depressed.

e shape of your room and how it’s furnished will aﬀect

the sound you hear. For instance, too many bare surfaces

can cause reﬂections that may add harshness to the

sound. Adding carpeting and drapes can help.

If you have a choice of rooms, avoid ones that are

perfectly square or have one dimension exactly twice

another. ese rooms can aggravate resonances that

colour the sound.

e customised installation of the P777 to a listening

room is an important process which requires care at

every stage. For this reason, the installation information

is very comprehensive and should be followed carefully.

is manual has been written with the assumption that

the installer is familiar with the installation of high-end

audio/video systems.

If the cables to be used to connect your pre-

ampliﬁer to the P777 are 3m or longer and your

pre-ampliﬁer has balanced XLR outputs, we

recommend using these instead of the phono

(RCA) connections. Performance will also be

improved in electrically-noisy environments

by using these connections. To use the XLR

connections, make sure that the ^{INPuT sElEcT}

switches are depressed for each channel.

12V Trigger input

If your pre-amp provides a 12V Trigger output, it can

be connected to the 12V TRIGGER IN socket using a mono

3.5mm jack. is enables the P777 to be turned on

remotely from the pre-amp.

Female XLR

Male XLR

tip: 12V trigger signal

sleeve: ground

Function

Chassis ground (cable shield)

‘Hot’ (normal polarity)

Note that the trigger input is only active when the

central power button on the front panel is depressed.

‘Cold’ (inverted polarity)

In normal use there is no need to make any connections

to this input.

E-4

Interconnect cables

We recommend the use of high-quality screened cables

that are designed for the particular application. Other

cables will have diﬀerent impedance characteristics

that will degrade the performance of your system (for

example, do not use cabling intended for video use to

carry audio signals). All cables should be kept as short as

is practically possible.

It is good practice when connecting your equipment to

make sure that the mains power-supply cabling is kept

as far away as possible from your audio cables. Failure to

do so may result in unwanted noise in the audio signals.

Speaker terminals

Input select switch

e P777 is equipped with seven pairs of

speaker terminals. See page 7 for information

on the diﬀerent ways of connecting

loudspeakers.

Depress this switch to take the audio source

from the BAlANcEd XlR INPuT connector for

each channel; if the switch is not depressed,

the audio source is taken from the AudIo IN

RCA (phono) connector.

CH.7 / SBR

4Ð16

OHMS

CH.6 / SR

4Ð16

OHMS

CH.5 / RIGHT

CH.4 / CENTRE

CH.3 / LEFT

CH.2 / SL

4Ð16

OHMS

CH.1 / SBL

4Ð16

OHMS

4Ð16

OHMS

4Ð16

OHMS

4Ð16

OHMS

CLASS 2

WIRING

CLASS 2

WIRING

CLASS 2

WIRING

CLASS 2

WIRING

CLASS 2

WIRING

CLASS 2

WIRING

CLASS 2

WIRING

XLR audio input

BALANCED

XLR INPUT

BALANCED

XLR INPUT

BALANCED

XLR INPUT

BALANCED

XLR INPUT

BALANCED

XLR INPUT

BALANCED

XLR INPUT

BALANCED

XLR INPUT

Balanced XLR connectors for each

of seven channels, from an XLR-

equipped pre-ampliﬁer.

XLR

RCA

XLR

RCA

XLR

RCA

XLR

RCA

XLR

RCA

XLR

RCA

XLR

RCA

INPUT

SELECT

INPUT

SELECT

INPUT

SELECT

INPUT

SELECT

INPUT

SELECT

INPUT

SELECT

INPUT

SELECT

OUT

AUDIO

POWER INLET

220V

- 240V

Power inlet

Check the mains

50Ð60Hz

1800VA

MAX

XLR CONNECTIONS:

PIN1: CABLE SCREEN

PIN2: ÔHOTÕ SIGNAL

PIN3: ÔCOLDÕ SIGNAL

supply voltage matches

the values printed on

the back panel before

connecting the mains

cable here.

12V TRIGGER

12V Trigger input

audio input and output

See page 4 for details.

AudIo IN from a pre-ampliﬁer for each of

seven channels. AudIo ouT may be used to

bi-amplify a set of speakers (see page 7).

E-5

speakers

Speaker placement

Speaker wiring options

notes on making speaker

connections

e P777 allows connection of up to seven

loudspeakers. All speakers, with the exception of the

subwoofer, should be arranged around your normal

viewing/listening position (see diagram). e subwoofer

can be placed almost anywhere and we recommend

experimenting with it in various positions to obtain the

best result.

e surround leﬅ (SL) and right (SR) speakers

reproduce the ambient sound and eﬀects present in a

multichannel home cinema system.

Single wiring

Single wiring is the conventional wiring method of

running a single cable per channel between the ampliﬁer

and the speaker; this is the easiest technique.

Do not make any connections to any ampliﬁer

while it is switched on. We recommend that

your ampliﬁer is completely disconnected

from the mains supply before starting.

e surround back leﬅ (SBL) and surround back right

(SBR) speakers are used to add extra depth, a more

spacious ambience and sound localisation.

bi-wiring

Before switching your ampliﬁer on for the

ﬁrst time aﬅer connecting to speakers, please

check all connections thoroughly. Ensure

that bare wires or cables are not touching

each other or the ampliﬁer’s chassis (which

could cause short circuits), and that you

have connected positive (+) to positive and

negative (–) to negative. Be sure to check the

wiring for both the ampliﬁer and the speaker.

Bi-wiring is running two separate cables between the

ampliﬁer and each speaker, with one cable carrying

the low-frequency information, the other the higher-

frequency signals.

A subwoofer (SW) will greatly improve the bass

performance from your system. is is useful for

reproducing special cinema eﬀects, especially where

a dedicated LFE (Low-Frequency Eﬀects) channel is

available, as with Dolby Digital or DTS Digital Surround

encoded discs.

e closer you place a speaker to intersecting room

surfaces (corners, wall and ceiling, wall and ﬂoor),

the stronger the bass output. is can help bass-shy

speakers, but it can also add too much bass. Again, just

moving a speaker a few inches can oﬅen make a big

diﬀerence in sound.

Bi-wiring can improve the sound of your system because

the separation of high- and low-frequency signal

currents into diﬀerent speaker cables avoids distortions

caused by the diﬀerent currents interacting with one-

another within a single cable, as occurs in single-wired

systems.

Position your front leﬅ (L) and right (R) speakers

to achieve a good stereo image for normal musical

reproduction. If they are placed too close together there

will be a lack of spaciousness. Alternatively if they are

placed too far apart the stereo image will appear to have

a hole in the middle and will be presented in

halves.

Aﬅer making connections: switch the

ampliﬁer on, with the pre-ampliﬁer volume

set to a low setting. Select a source signal, then

gradually increase the volume to the required

listening level.

If you are unsure as to how your system

should be connected, or need advice on

bi-wiring or bi-amping, please contact your

Arcam dealer who will be happy to help you.

e P777 is designed to allow easy bi-wiring, but you

will need to connect to loudspeakers that provide

separate terminals for the two cables. Each speaker

must have two pairs of terminals; one pair labelled ^HF

or ‘High Frequency’, the other pair labelled lF or ‘Low

Frequency’.

two

e centre speaker (C) allows for a more

realistic reproduction of dialogue and

centre sounds as well as wider and

better imaging for stereo eﬀects

and background sounds for

bi-amping

Bi-amping is the separation of the ampliﬁcation of

low- and high-frequency signals over two ampliﬁers.

Bi-amping requires the use of two ampliﬁers per

channel.

home cinema use. Do not

compromise on the quality

of your centre speaker as it

carries all the dialogue for a

home cinema system.

SBL

SBR

E-6

Single wiring

...etc...

If each speaker has more than one pair of connecting terminals, use the terminals labelled

lF or ‘Low Frequency’ for each speaker.

Connect the positive terminal of the right speaker connection on the ampliﬁer (coloured

red and labelled +R) to the positive terminal of your right speaker. Similarly, connect the

negative terminal of the ampliﬁer (coloured black and labelled with R–) to the negative

terminal of your speaker. Repeat the process for the leﬅ speaker, using the ampliﬁer

terminals labelled +l and l–.

Arcam P777

IN OUT

Single wiring speaker

connections

If your speakers support bi-wiring, then there is a strip of conductive metal on the

speakers connecting the low-frequency terminals to those for the higher-frequencies; this

MUST NOT BE REMOVED in a single-wired system.

SBR

SBL

Outputs from multichannel pre-amp (e.g AV888)

bi-wiring

Bi-wiring is performed in the same way as single wiring except that, for each speaker, a

pair of cables are used to connect the ampliﬁer to each speaker.

Follow the instructions given for single wiring; then perform the same actions, this time

connecting the upper set of speaker terminals on your ampliﬁer to the terminals labelled

HF or ‘High Frequency’ for each speaker. Please refer to the illustration.

Arcam P777

Speakers that support bi-wiring have a strip of metal on the speakers connecting the low-

frequency terminals to those for the higher-frequencies; this MUST BE REMOVED in a

bi-wired system.

IN OUT

Bi-wiring using one ampliﬁer

channel per speaker

bi-amping

Bi-amping requires the use of two ampliﬁer channels per speaker. Using this method will

prevent you from using seven surround speakers.

Connect two channels of the P777 with a phono cable between the ^{AudIo ouT}socket on

one channel to the AudIo IN channel of another. One channel should then be connected to

the speakers as described for single wiring, with the exception that this channel should be

connected to the speaker terminals labelled HF or ‘High Frequency’. e second channel must

then be connected to the ^lFor ‘Low Frequency’ terminals, as in the diagram.

Note that the strip of metal on the speakers connecting the lower terminals to the upper

terminals MUST BE REMOVED. Failure to do so will result in damage to both ampliﬁers,

which will not normally be covered under warranty.

IN OUT

Bi-amping using two ampliﬁer

channels per speaker

Arcam P777

Arcam recommends that the phono connections are use for bi-amping. If you prefer to use the

XLR connectors, use a Y-lead with one female XLR to two male XLRs, so that two ampliﬁer

channels may be fed from a single source. Contact your dealer if you need assistance.

E-7

MULTICHANNEL POWER AMPLIFIER

operation

In the unlikely event that the LEDs do not follow this

sequence when the unit is powered up, or they behave

abnormally at any time during use, then refer to the

‘Fault status indicators’ table on page 10 to discover why

the ampliﬁer is in protection mode.

Front panel control

operating procedure

Once the relevant connections have been made, the

P777 can be switched on using the central button on the

front panel.

e front panel has a single control: a centrally located

power on/oﬀ button.

PoWER

Switching on

It is recommended that you switch on your pre-ampliﬁer

or controller before powering up the power ampliﬁer.

Switching oﬀ

To shut down, switch the power ampliﬁer oﬀ ﬁrst,

followed by the pre-ampliﬁer or controller.

is eliminates the chance of any ‘thumps’ or power

spikes being fed through to the power ampliﬁer and

potentially causing damage to the system.

Switches the unit on and oﬀ. Note that the modules are

turned on individually to stagger the surge created when

a powerful ampliﬁer is switched on (i.e., it provides a

‘soﬅ start’). is reduces the surge current drawn from

the domestic power supply.

Normal powering up is indicated by the following

sequence of front panel LED indicators:

1. On pressing the power switch, all LEDs turn red.

2. Aﬅer a short delay (about half-a-second), the

centre LED turns amber.

3. e LEDs continue turning amber from the

centre to the edges in pairs, at about one second

intervals.

4. e centre LED turns green and a relay ‘click’ is

heard.

5. e LEDs continue turning green from the centre

to the edges in pairs, along with relay ‘clicks’, at

about one second intervals.

Status LEds

A separate LED indicates the status of each of the seven

channels of the P777.

e LEDs cycle through red, orange, then green to

indicate the status from powered-up (initialised),

stabilised and active respectively.

All LEDs are oﬀ in standby mode.

E-8

trouble-

shooting

the signal (interconnect) leads are not wrapped

around a mains lead.

try switching the ground liﬅ on the back panel of

the processor (if available).

no Lights on the Unit

Check that:

Sound only comes from some of the speakers

Check that:

the power cord is plugged into the P777 and the

mains socket outlet it is plugged into is switched

on.

all speakers in the system are connected to the

P777.

you have conﬁgured your pre-amp to include all

the speakers in your system.

you have an appropriate surround sound source

selected and playing through the pre-amp.

for digital sources, check the player is outputting

multichannel data. With some DVD players you

are able to select in what format multi-format

encoded discs are outputted, and whether

multichannel data is down-mixed to PCM

(stereo).

There is radio/television reception

interference

e P777 has been designed to a very high standards of

electromagnetic compatibility.

the plug fuse has not failed, or a circuit-breaker

earlier in the power supply path has not opened.

the power button is pressed in.

Check that:

Red LEd present

Refer to the ‘Fault status indicators’ table (overleaf) if

you have an unusual sequence of LEDs.

the aerial/dish cable is routed as far as possible

from your ampliﬁer and its cabling.

the cabling used from the aerial/dish is of high

quality and screened.

repositioning the receiving aerial/dish as far as

possible from your ampliﬁer and its cabling may

bring an improvement.

if the problem persists, contact your aerial

contractor.

no sound is produced

Check that:

the disc you are playing is a multichannel

recording and that the processor is outputting

multichannel audio.

the correct input has been selected on the pre-

ampliﬁer.

you have assigned the digital input to the correct

input source.

the volume is turned up to a reasonable level and

‘MUTE’ is not displayed on the front panel display

on the pre-ampliﬁer.

your speaker balance is correct.

all ampliﬁers are turned on and all channels are

working correctly.

you are using high quality screened audio cable

between your equipment and that no cables are

broken or damaged.

all units are turned on. If the audio is ‘daisy-

chained’ from the P777, make sure that the unit

being fed is turned on.

your power ampliﬁer(s) are turned on and

working correctly.

Hum on an ampliﬁer output

Check that:

Sound is poor and badly distorted

Check that:

all cables are making a good connection. If

necessary withdraw the cable from the connector

and plug it back in again. (Turn the power oﬀ

before doing this.)

all cables are making a good connection. If

necessary withdraw the cable from the connector

and plug it back in again. (Turn the power oﬀ

before doing this.)

if the hum originates from a ground loop caused

by an aerial, satellite dish or cable supply, you

should contact your aerial contractor.

you have selected the correct size of speakers

to suit your system in the setup menu of the

processor or pre-amp.

E-9

Fault status indicators

e LED patterns below indicate the following fault conditions:

LED status

All LEDs are green

Description

is is the normal operating state of the ampliﬁer.

Ampliﬁer action

None

During power up all LEDs stay red for an extended time e ampliﬁer is waiting for the DC oﬀset fault lines to

clear. A DC oﬀset fault can occur if an excessive DC

To verify excessive DC oﬀset voltage, remove the

interconnect leads (with the P777 switched oﬀ) and turn

on the P777. e fault should have cleared.

voltage is present at the output of the pre-amp feeding

the P777. Normal operation resumes if the lines clear in

20 seconds.

During power up or normal operation, one or more

e DC fault cannot be cleared. e channels with the

e ampliﬁer shuts down. e power switch must be

LEDs are ﬂashing green, with the remaining LEDs solid ﬂashing green LEDs represent the ampliﬁer modules that cycled to reset the ampliﬁer (cycling the trigger does

red

have a DC oﬀset fault. Alternatively, a DC oﬀset fault has NOT reset the ampliﬁer).

reoccurred on the same channel within 12 seconds of a

previous DC oﬀset fault clearance.

During power up or normal operation, one or more

e ampliﬁer is attempting to clear a DC oﬀset fault on a e ampliﬁer mutes the channel with the fault and its

LEDs are ﬂashing green, with the remaining LEDs NOT channel with the ﬂashing green LED.

paired channel. e ampliﬁer stays in this state for up

to two seconds or until the fault clears (whichever is

sooner).

solid red

During power up or normal operation, one or more

LEDs are ﬂashing red, with the remaining LEDs solid

red

A short circuit fault cannot be cleared. e ﬂashing red

e ampliﬁer shuts down. e power switch must be

LEDs represent the ampliﬁer modules with a short circuit cycled to reset the ampliﬁer (cycling the trigger resets the

fault. Alternatively, a short circuit fault has reoccurred on ampliﬁer).

the same channel within 12 seconds of a previous short

circuit fault clearance.

During power up or normal operation, one or more

LEDs are ﬂashing red, with the remaining LEDs NOT

solid red

e ampliﬁer is attempting to clear a short circuit fault on e ampliﬁer mutes the channel with the fault and its

a channel with the ﬂashing red LED.

paired channel. e ampliﬁer stays in this state for up

to half-a-second or until the fault clears (whichever is

sooner).

During power up or normal operation, one or more

LEDs are ﬂashing amber

e ampliﬁer is attempting to clear an over temperature

fault on a channel with the ﬂashing amber LED.

e ampliﬁer mutes the channel with the fault and its

paired channel and the fan is set to maximum speed. e

ampliﬁer stays in this state until the channel has cooled.

During power up or normal operation, one LED is

ﬂashing amber, with the remaining LEDs solid red

An over temperature fault has reoccurred on the same

e ampliﬁer shuts down. e power switch must be

channel within 12 seconds of a previous over temperature cycled to reset the ampliﬁer (cycling the trigger resets the

fault clearance. e ﬂashing amber LEDs represent the

ampliﬁer modules with an over temperature fault.

ampliﬁer).

During power up or normal operation, all the LEDs are

ﬂashing amber

e ampliﬁer is attempting to clear an over temperature

fault on more than one channel, or the power

transformers have overheated.

e ampliﬁer mutes all channels and the fan is set to

maximum speed. e ampliﬁer stays in this state until all

channels have cooled, or the transformer has cooled.

During normal operation, all the LEDs are solid red

An over temperature fault has reoccurred on one or more e ampliﬁer shuts down. e power switch must be

channels, or the power transformers have overheated

within 12 seconds of a previous over temperature fault

clearance.

cycled to reset the ampliﬁer (cycling the trigger resets the

ampliﬁer).

During power up or normal operation, one or more

LEDs are ﬂashing amber, with the remaining LEDs

ﬂashing green

A DC oﬀset fault occurred on one or more channels

while attempting to clear a multiple over temperature

fault.

e ampliﬁer shuts down. e power switch must be

cycled to reset the ampliﬁer (cycling the trigger does

NOT reset the ampliﬁer).

During power up or normal operation, one or more

LEDs are ﬂashing amber, with the remaining LEDs

ﬂashing red

A short circuit fault occurred on one or more channels

while attempting to clear a multiple over temperature

fault.

e ampliﬁer shuts down. e power switch must be

cycled to reset the ampliﬁer (cycling the trigger resets the

ampliﬁer).

E-10

speciﬁcations

All measurements are with 230V/50Hz mains power

Maximum continuous output power

Continual improvement policy

Arcam has a policy of continual improvement for its

products. is means that designs and speciﬁcations

are subject to change without notice.

All channels driven, 20Hz–20kHz, 8Ω

All channels driven, 20Hz–20kHz, 4Ω

One or two channels driven at 1kHz, 8Ω

One or two channels driven at 1kHz, 4Ω

Total harmonic distortion

160W per channel; 1.05kW total

270W per channel; 1.62kW total

170W per channel

Radio interference

e P777 is an audio device which has been

designed to very high standards of electromagnetic

compatibility.

290W per channel

At any level up to rated power, into 4Ω or 8Ω

Frequency response

Typically <0.004% at 1kHz

e unit can radiate RF (radio frequency) energy.

In some cases this can cause interference with FM

and AM radio reception. If this is the case, keep the

P777 and its connecting cables as far from the tuner

and its aerials as possible. Connecting the P777 and

the tuner to diﬀerent mains sockets can also help to

reduce interference.

Less than –0.3dB (10Hz—20kHz)

–3dB at 100kHz

Residual hum and noise

Ref. full power

–108dB, 20Hz–20kHz, unweighted

x37 (31.5dB), Arcam standard

470pF in parallel with 22kΩ

EC Countries – ese products have been designed

to comply with directive 89/336/EEC.

Voltage gain

USA – ese products comply with FCC

requirements.

Input impedance

General

Power requirements

115V or 230VAC, 50/60Hz, 1200W maximum via heavy

duty IEC C20 mains inlet (requires IEC C19 plug).

A soﬅ start system eliminates large inrush currents at

switch on.

Physical

E&OE

Dimensions: W430 x D450 x H180mm

Weight: 37.2kg net; 40kg packed

NOTE: All speciﬁcation values are typical unless otherwise stated

E-11

Worldwide Guarantee

is entitles you to have the unit repaired free of charge, during the ﬁrst two years

aﬅer purchase, at any authorised Arcam distributor provided that it was originally

purchased from an authorised Arcam dealer or distributor. e manufacturer can take

no responsibility for defects arising from accident, misuse, abuse, wear and tear, neglect

or through unauthorized adjustment and/or repair, neither can they accept responsibility

for damage or loss occurring during transit to or from the person claiming under the

guarantee.

product

guarantee

The warranty covers:

Parts and labour costs for two years from the purchase date. Aﬅer two years you must pay

for both parts and labour costs. e warranty does not cover transportation costs at any

time.

Claims under guarantee

is equipment should be packed in the original packing and returned to the dealer from

whom it was purchased, or failing this, directly to the Arcam distributor in the country of

residence.

It should be sent carriage prepaid by a reputable carrier – not by post. No responsibility

can be accepted for the unit whilst in transit to the dealer or distributor and customers are

therefore advised to insure the unit against loss or damage whilst in transit.

For further details contact Arcam at:

Arcam Customer Support Department,

Pembroke Avenue, Waterbeach,

CAMBRIDGE,

CB25 9QR, England

or via www.arcam.co.uk.

Problems?

If your Arcam dealer is unable to answer any query regarding this or any other Arcam

product please contact Arcam Customer Support at the above address and we will do our

best to help you.

on-line registration

You can register your product on-line at www.arcam.co.uk.

Correct disposal of this product

is marking indicates that this

product should not be disposed with

other household waste throughout

the EU.

To prevent possible harm to the

environment or human health from

uncontrolled waste disposal and to

conserve material resources, this

product should be recycled responsibly.

To dispose of your product, please use your local

return and collection systems or contact the retailer

where the product was purchased.

E-12

E-13

A&R cAMBRIdGE lTd, PEMBRokE AVENuE, WATERBEAcH, cAMBRIdGE cB25 9QR, ENGlANd

SH213E Issue 2

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