Warwick Stereo Amplifier 153 User Manual

OFFICIAL WARWICK  
AMP OWNER MANUAL  
SWEET 15.3 - SWEET 25.2  
 
SAFETY HINTS  
- Please read these instructions  
- Please heed all warnings  
Caution: To reduce the risk of electric shock, do  
not open the amplifier’s case. Avoid exposure to  
rain or moisture. No user serviceable parts inside,  
refer all service to a qualified technician. No ves-  
sel filled with liquids, such as vases shall be pla-  
ced on top of the unit.  
This symbol, wherever it appears, alerts you to  
the presence of dangerous non-insulated voltage  
inside the case. Risk of electric shock!  
This symbol, wherever it appears, indicates to  
important operating and maintenance instruct-  
ions in this user manual. Please read the manual.  
!
This recycling logo informs the end user that it is  
forbidden to throw away the product in the trash.  
It has to be disposed of accordingly.  
Weee-Nr.: DE93670540  
CB Approved  
4
 
GENERAL INFORMATION  
For safe and reliable operation please follow these instructions:  
DO NOT open the amplifier case! You might receive an electrical shock. For any repair refer to qualified service personnel.  
Avoid dust, excessive moisture, direct sunlight and extremely high or low temperatures.  
Safeguard the device from impact. Always place the unit on a stable and horizontal surface.  
Do not block any of the ventilation openings.  
Avoid leaving the unit near radiators or other heat producing devices.  
Internal components should be adjusted or cleaned by qualified service technicians only. Make sure no object or liquid pene-  
trates the device through its cooling vents.  
Fuse must be replaced with one of the same type and value to avoid damaging the amplifier.  
the mains cable or mains switch have been damaged,  
objects or liquids have penetrated the device,  
it has been exposed to excessive moisture,  
malfunctions or abnormal operating conditions have occurred,  
the device has been dropped or the case has been damaged.  
Have the device examined by a qualified service technician in the following cases:  
- Make sure the unit is plugged into a socket outlet with a protective grounding connection.  
- Mains plug must be accessible at any time to disconnect it from mains in case of abnormal operation.  
- If the device shows any malfunction, immediately disconnect the mains cable from the mains socket.  
- Use effects pedals only between the instrument and the amplifier since these devices do not meet the electrical specifications  
of the effects loop.  
- Unplug the unit whenever changing a fuse.  
- Replace fuse only with one of the same type and value. Never bridge defective fuses.  
5
 
PROTECTIVE CIRCUITS (SWEET 15.3, SWEET 25.2 only)  
HF oscillation:  
This safety feature prevents from damages caused by frequencies above 20 kHz (feedback, etc.) by  
switching the power amp off.  
Temperature:  
Should the temperature controlled fan cooler prove to be insufficient in extreme conditions, this circuit  
protects the output stage transistors from destruction by switching the device off.  
Direct current (DC): This circuit continuously monitors the power amp output for direct current and protects the loud-  
speakers from overload in case a transistor burns out.  
GETTING STARTED  
1. Make sure that the mains lead is connected and all external devices (effects) are properly connected and working.  
2. Set the VOLUME control (Blue Cab 15.1, 30.1, 60.1) / MASTER control (Sweet 15.3, 25.2) to zero.  
3. Plug your bass guitar into the amplifier's INPUT using a shielded cable.  
4. Press the POWER switch to turn the device on.  
5. Switch off MUTE - the red LED will turn off. (Sweet 15.3, 25.2)  
6. Turn up all volume controls of your bass guitar.  
7. Adjust the GAIN control until the clip LED flashes. (Sweet 15.3, 25.2)  
8. Set VOLUME control (Blue Cab 15.1, 30.1, 60.1) / MASTER contol (Sweet 15.3, 25.2) to your desired volume.  
9. Use the sound controls / switches to adjust the sound as described in the respective chapters FRONT PANEL CONTROLS.  
10. If necessary readjust the GAIN. (Sweet 15.3, 25.2)  
6
 
FRONT PANEL CONTROLS  
INPUT  
GAIN  
socket to plug in a bass guitar.  
control + CLIP LED to adjust the input level.  
GRAPHIC EQ  
LOW BOOST  
HIGH BOOST  
EFF. LOOP  
8 band EQ to cut / boost the respective frequencies by +/- 12 dB.  
switch + LED to boost deep frequencies.  
switch + LED to boost high frequencies.  
for the insertion of effect units. Connect EFF. SEND with the input and EFF. RETURN with the output of the  
effect device.  
LINE OUT  
MASTER  
MUTE  
socket allows connecting additional power amplifiers, active cabinets or a mixing console.  
control determines the main level.  
switch + ON / MUTE LED mutes the signal of all outputs except the PHONES socket. To avoid switching noise  
use the MUTE switch only when no audio signal is beeing played back.  
socket for connecting headphones (min 200 Ohm).  
PHONES  
REAR PANEL  
MAINS IN AC  
POWER  
terminal with integrated fuse compartment for connecting the amplifier to mains.  
switch for turning the amplifier on and off.  
SPEAKER OUT to connect the amplifier to the speaker.  
HORN OFF switch to turn the horn off.  
The rear stand allows for a 45-degree tilt of the amplifier.  
10  
 
FRONT PANEL CONTROLS  
GAIN  
INPUT  
control + CLIP LED to adjust the input level.  
socket to plug in a bass guitar.  
COMPRESSOR switch to turn on the compressor and control to adjust the compression rate.  
CONTOUR  
BASS  
LOW MID  
HIGH MID  
TREBLE  
DEEP  
switch to turn on the contour and control to adjust the intensity. Boosts bass and treble, cuts mids.  
control to boost / cut deep frequencies.  
control to boost / cut low mid frequencies.  
control to boost / cut high mid frequencies.  
control to boost / cut high frequencies.  
switch + LED to boost low frequencies.  
BRIGHT  
MUTE  
switch + LED to boost high frequencies.  
switch + ON / MUTE LED mutes the signal of all outputs except the PHONES and TUNER socket. To avoid  
switching noise use the MUTE switch only while no audio signal is beeing played back.  
socket for connecting headphones (min 200 Ohm).  
PHONES  
MASTER  
control determines the main volume level.  
REAR PANEL  
GROUNDLIFT  
switch disconnects the protective ground line from signal ground. A humming loop may occour when  
several devices are hooked up to the same protective ground line and connected by line cables. Use  
GROUNDLIFT to eliminate humming loops.  
TUNER OUT  
LINE OUT  
EFF. LOOP  
to connect to a tuner, active when MUTE is enabled.  
socket allows connecting additional power amplifiers or active cabinets.  
for the insertion of an effects unit. Connect EFF. SEND with the input and EFF. RETURN with the output of the  
effects device.  
DI PRE / POST switch to route the signal to  
DI OUT socket PRE (pressed, direct signal from the bass) or POST (released, signal affected by equalizer or effects  
loop). Symmetric XLR out to connect to e.g. a mixing console.  
SPEAKER OUT to connect the amplifier to the speaker.  
POWER  
MAINS IN AC  
HORN OFF  
switch for turning the amplifier on and off.  
terminal with integrated fuse compartment for connecting the amplifier to mains.  
switch to turn the horn off.  
The rear stand allows for a 45-degree tilt of the amplifier.  
11  
 
TECHNICAL DATA  
SWEET 15.3  
SWEET 25.2  
INPUT  
25 mV  
25 mV  
PREAMP  
transistor  
fan cooled  
15”  
transistor  
fan cooled  
15”  
POWER AMP  
SPEAKER  
EQUALIZER  
8 band EQ  
HI / LO BOOST  
BASS, HI / LO MID,  
TREB, VARIABLE CON-  
TOUR, DEEP , BRIGHT  
COMPRESSOR  
HEADPHONE  
EFFECT LOOP  
-
adjustable  
min 200 Ohm  
min 200 Ohm  
mono serial  
send 0 dBu, 600 Ohm  
return 0 dBu, 10 kOhm  
mono serial  
send 0 dBu, 600 Ohm  
return 0 dBu, 10 kOhm  
REAR CONTROL  
NOMINAL POWER  
THD  
horn switch  
300 Watt  
< 0.1%  
horn switch  
500 Watt  
< 0.1%  
WEIGHT  
28 / 32  
32 / 36  
(NET / GROSS, kg)  
DIMENSIONS COMBO 53 x 33 x 63  
(cm)  
54 x 34 x 70  
68 x 48 x 86  
DIMENSIONS CART.  
BOX (cm)  
66 x 47 x 78  
9
 
CIRCUIT DIAGRAM  
106  
 
CIRCUIT DIAGRAM  
107  
 
For support information please refer to [email protected]  
Headquarters:  
Branch China:  
Branch UK:  
Warwick GmbH&Co.Music Equipment KG • Gewerbegebiet Wohlhausen • 08258 Markneukirchen/Germany • E-Mail: [email protected]  
Warwick Music Equipment (Shanghai) Ltd., Co.•Shanghai Waigaoqiao Free Trade Zone • Shanghai 200131/P.R.China • E-Mail: [email protected]  
Warwick Music Equipment Trading (Manchester UK) Ltd. • 75 Bridge Street • Manchester M3 2RH / Great Britain • E-Mail: [email protected]  
Branch Switzerland: Warwick Music Equipment Trading (Zurich) GmbH • Kriesbachstrasse 30 • 8600 Dübendorf / Switzerland • E-Mail: [email protected]  
Branch CZ:  
Warwick Music Equipment Trading (Praha CZ) s.r.o. • Spálená 23/93 • 11000 Praha 1 / Czech Republic • E-Mail: [email protected]  
 

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