Fishman Musical Instrument Pro Eq User Manual

USER GUIDE  
PRO-EQ PLATINUM BASS  
 
Quick Start  
1. Place XLR Pre/Post switch to “post” position.  
ꢀ. Adjust the Input Gain so that the Clip/Low Battery light barely flickers with strong playing.  
ꢁ. For acoustic bass only: Set Phase switch to position that sounds best and suppresses feedback.  
4. Set Compression and Depth to 10:00.  
5. Set EQ and re-adjust Input Gain if necessary (Clip LED should barely flicker with strong playing).  
 
Power Options  
1. 9-Volt Battery  
Squeeze the tabs on top of the preamp together and the battery drawer will pop out. Snap in a fresh 9-Volt  
alkaline. To conserve the battery, unplug the input of the Platinum Bass when you are not using the preamp.  
2. 48-Volt Phantom Power  
Use an XLR cable to connect the Platinum Bass to a mixing board with 48V phantom power. When you turn  
on the 48V phantom at the mixer, the green 48V phantom LED lights up, the 9V battery shuts off and the  
Platinum Bass draws power through the XLR cable.  
The green 48V phantom LED may not light up once you switch on phantom power. This means the phantom  
power from the mixer is not delivering enough voltage. For insurance, keep a fresh 9V battery in the preamp.  
The battery will take up the slack if the phantom power is too low.  
3. AC Adapter Input  
(center = negative)  
Use only a well filtered and regulated AC adapter with a 9-Volt DC output. We  
recommend the Fishman 910-R. Use of a non-recommended adapter may void  
the warranty and damage the unit.  
Input—Plug your bass in here  
When you plug into the input jack, the 9-Volt battery switches on. Remember to unplug the input jack when  
you are not using the preamp to save the battery. Turn down your amp or mute your mixer input before you  
plug into the Platinum Bass input to protect your speakers (and your ears) from loud pops.  
4
 
Input Gain  
For the cleanest possible signal, adjust the Input Gain so that the Clip/Low Battery LED barely flickers with  
strong playing. If the Clip LED lights up brightly as you play, your bass signal is overdriving the circuit and  
you will hear distortion. Not every instrument will have enough signal to engage the Clip light on your  
Platinum. This is perfectly acceptable.  
Clip/Low Battery Indicator  
This light has three distinct functions:  
1. Power Up Indicator  
The LED flashes briefly when you plug into the input—it is telling you that the unit is powering up.  
2. Clip Indicator  
Flashes brightly when your bass signal overloads the preamp. Adjust the Input Gain so that the Clip LED  
barely flashes with strong playing.  
3. Low Battery Warning  
When the red LED lights with no signal present it is time to change the battery. If the Low Battery light  
comes on while you’re playing don’t worry, you’ll have enough power to get through a gig (at least 4 hours).  
Volume  
For the cleanest sound, set the Volume as high as you can without distorting your amp or mixer.  
Compression  
This allows you to alter the attack, sustain and dynamics of your bass. Set the Input Gain before you turn on  
the compressor (compression is off at 7:00).  
5
 
Compression (continued)  
To gently smooth out your instruments all-around response, set the Compression between 8:00 and 11:00.  
For more punch set the Compression between 1ꢀ:00 and ꢀ:00. This is especially effective for tumbao and  
walking bass styles.  
For heavy compression with lots of sustain set the Compression knob between ꢁ:00 and 5:00 (for best results  
set the Input Gain as high as possible without lighting the red Clip light).  
Depth  
Tighten up your sound, or dial out deep-bass feedback with the Depth control. The Depth control works hand  
in hand with the Bass control to bring out tight and articulate lows:  
1. Start with the Depth turned up full (5:00) with the EQ set flat on your bass amp and/or PA.  
ꢀ. Set the Bass control to full boost.  
ꢁ. Play the bass and back off the Depth (counter-clockwise) until you hear the sound tighten up,  
usually between 9:00 and 1ꢀ:00.  
4. Re-set the Bass slider to taste.  
Phase Switch  
Use the Phase switch hand in hand with the Depth control to suppress feedback for upright bass and acoustic  
bass guitar.  
Electric bassists (solid body) can ignore this section—just leave the Phase switch in either position and go!  
Unlike electric bass, acoustic bass tends to feed back when you amplify it at high volumes.  
Feedback generally occurs in two different ranges: deep-bass feedback (open D and below) and mid-bass  
feedback (above open G).  
 
Fighting Feedback  
1. Start with the Phase switch in the left position and the Depth control at 5:00.  
ꢀ. Turn your amp or PA up so that it is on the verge of feedback.  
ꢁ. Flip the Phase switch back and forth until you find the position that sounds good and  
doesn’t feed back from open G and above (mid-bass feedback).  
4. Turn up the amp some more until you get feedback around open D and below (deep-bass  
feedback).  
5. Move the Depth control counter-clockwise until deep bass feedback goes away. (usually  
between 9:00 and 10:00).  
Deep-bass Feedback  
(Open D and Below)  
Mid-bass Feedback  
(Open G and Above)  
7
 
Tone Controls  
Bass - We carefully voiced this control to give you the deep bass you need for your lowest notes, with plenty  
of mid-bass punch for the D and G strings. If the sound becomes boomy when you raise the Bass control,  
lower the Depth control until the sound tightens up.  
Low-mid - Boost here to thicken up the low end. Cut low mids for a more transparent tone or to reduce  
feedback with acoustic bass.  
Mid - This control subtly affects how well the instrument blends in or stands out in the mix.  
Hi mid - This control zeroes in on click, fret buzz and string handling sounds produced by your fingertips.  
Treble - The Platinum Bass’ circuitry ensures smooth and sweet treble. Cut treble for a vintage “flatwound”  
sound.  
Output (1/4" unbalanced)  
Signal Path: Bass signal Input Gain Depth EQ Compression Volume Phase Switch Output  
Plug a standard instrument cable from the Platinum Bass output to your bass amp or an unbalanced input  
on a mixer.  
XLR (balanced) Out  
Plug a standard mic cable from the XLR out into a PA or recording console.  
Note that the Platinum Bass can be powered by a 48V phantom supply through this output.  
(See Power Options on page 4)  
8
 
XLR Pre/Post Switch  
Choose between a true D.I. (pre EQ) or an affected XLR output (post EQ).  
1. XLR Post  
Signal Path: Bass Signal Input Gain Depth EQ Compression Volume Phase Switch XLR Out  
Post is useful in live venues (especially if you are mixing from onstage) where you want your personal  
“dialed-in” sound to come through the PA.  
2. XLR Pre  
Signal Path: Bass Signal Input Buffer Phase Switch XLR Out  
You’ll find that this true direct or “DI” output produces a warm and uncluttered signal that is exceptional  
for recording. Set the Pre/Post switch to the Pre position when you want a “flat” DI signal going to the  
board and you wish to leave it to the sound-person or recording engineer to dial up the bass tone from  
the console.  
XLR Ground Lift  
Use this switch to eliminate AC ground loop hum. When you use the XLR and one of the other outputs  
together and you hear hum from the speakers, put the switch in the Lift position and the hum should go  
away. If you use all three outputs (XLR, 1/4" output and tuner/send) to three separate AC powered devices,  
the “lift” position may not completely eliminate ground loop hum.  
Note: When you use only the XLR out, leave the Gnd/Lift switch in the “gnd” position. In these cases, if you move the switch to the “lift”  
position, you will hear a “pop” through your speakers and phantom power to the unit may be compromised.  
Tuner/Send  
Signal Path: Bass Signal Input Buffer Tuner/Send  
Use the tuner/send output when you need an unbalanced direct signal that is not affected by any of the  
front panel controls. Use it for an external tuner or as an aux send to a stage amp or a second mixer for  
broadcast/live recording.  
9
 
Sample EQ Settings  
Here are a few suggested settings for the Pro-EQ Platinum Bass:  
Dub/Reggae  
Tumbao  
Fretless Jazz  
Classic Thumb-style  
10  
 
Studio Acoustic  
Motown  
Five String  
Fishman BP-100-pizz/arco  
11  
 
Stage Setups  
1. Set the XLR Pre/Post switch to  
ꢀ. Plug into a bass amp. Start with the  
amps tone controls set flat. Primary  
equalization is performed by the  
Platinum Bass EQ.  
“post” when you want your personal  
“dialed in” sound to come through  
the PA.  
1/4" Instrument Cable  
plugged into Active Input  
XLR Cable  
XLR Out  
Input  
Input  
Output  
XLR Switch  
set for POST EQ  
PA System  
Bass Amplifier  
1ꢀ  
 
ꢀa. Alternate into bass amp (especially  
for upright)  
ꢁ. Splitter/Transparent” DI:  
If you wish, you may bypass all  
the Platinums controls for a true  
buffered DI into both the PA and  
a bass amp.  
For a cleaner and less colored  
sound, try bypassing the preamp in  
your bass amp and plug the output  
from the Platinum Bass directly into  
the effects return or the power amp  
input at the back of your amp.  
PA System  
1/4" Instrument Cable  
plugged into Effects Return  
XLR Cable  
Send Return  
Input  
XLR Out  
Input  
Output  
Tuner / Send  
Back of Bass Amplifier  
Bass Amplifier  
XLR Switch set for PRE EQ  
1ꢁ  
 
Block Diagram  
input  
input gain  
depth  
tuner / send  
output  
phase  
low  
mid  
mid  
hi  
mid  
volume  
compression  
bass  
treble  
pre  
lift  
gnd  
post  
14  
 
Specifications  
Nominal Input Level:  
Input Overload Level:  
Input Impedance:  
-14dBu  
+10dBu  
10MΩ  
Nominal Output Levels and Impedances  
Amp Out::  
-ꢀ0dBu to +10dBu (1kΩ)  
-14dBu to +10dBu (1kΩ)  
-ꢁ0dBu to -ꢂdBu (ꢂ00Ω)  
Tuner/Send Out:  
XLR Out :  
Tone Controls  
Bass:  
1ꢀdB @ ꢁ0Hz  
Low mid:  
+ꢂdB, -1ꢀdB @ ꢀ00Hz  
+ꢂdB, -1ꢀdB @ 1.ꢀ5kHz  
9dB @ 5kHz  
Mid:  
Hi Mid:  
Treble:  
1ꢀdB @ 10kHz  
All tone controls within 1 dB of nominal.  
Depth Control:  
Range:  
1ꢀdB/octave low cut filter  
15Hz (5:00) to 1ꢀ5Hz (7:00)  
max gain reduction: -14dB  
Less than .05%, -14dBu input level  
-89dBu (-91dBV)  
Compressor  
THD @ 1kHz:  
A weighted S/N:  
Noise:  
ꢀ7µV (A weighted)  
Power Options  
9 Volt Alkaline Battery:  
(Battery life est. 80+ hours continuous)  
Current draw: 4.5mA typical  
Low Battery light comes on when approx 4 hours of battery life remain  
OR  
48 Volt phantom power via XLR cable  
OR  
Fishman 910 AC adapter (center negative)  
15  
All specifications subject to change without notice.  
 
Technical support, troubleshooting tips and other product information can be found at www.fishman.com/support/  
www.fishman.com  
 
009-091-00ꢀ Rev B 1ꢀ-07  

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