Fishman OUTBOARD PREAMP User manual

USER GUIDE

OUTBOARD PREAMPS

Welcome

Thank you for making Fishman a part of your acoustic experience. We are proud

to offer you the ﬁnest acoustic ampliﬁcation products available: high-quality

professional-grade tools which empower you to sound your very best.

Preamp Formats

G II: For acoustic instruments including guitar, violin, viola, ’cello and mandolin.

B II: For upright acoustic bass and acoustic/electric bass guitar.

Pro-EQ II: More tone shaping EQ for all acoustic instruments, including bass.

Quick Start

Power: Install a 9V alkaline or lithium battery (not included).

Plug in: Use standard ¼” shielded instrument cables.

Set input gain: Play hard and

adjust gain for minimal clipping.

Dial it in: Adjust the level, tone

or EQ to taste.

Features

Power

Power may be supplied by either a 9V battery (battery compartment under the

device) or an AC adapter (sold separately). Insert a plug into either input jack,

and the preamp powers up. To conserve the battery, remove the plug(s) from the

input jack(s) when not in use.

For AC power, use the Fishman 910-R (for 110V) or other suitable 9V adapter.

The adapter must be ﬁltered, regulated and rated for at least 200mA. It must

also accept AC power appropriate for your country. Power-plug requirements:

5.5mm O.D., 2mm I.D., tip = negative.

Input

The input accepts all piezo and magnetic pickups (passive or active). It is a

good idea to turn down your amp or mixer before you plug into the input of

the preamp.

Output

Plug a standard instrument cable from the output to a stage amp, a DI or an

unbalanced microphone input on a mixer.

Input gain

You’ll ﬁnd this miniature rotary control recessed in the back of the preamp. Like

a trim control on a mixer, the input gain accommodates a variety of signal levels.

Use a slot head jeweler’s screwdriver to raise or lower the input level.

If the signal coming from your pickup is very weak, you may wish to turn the input

trim clockwise, which will raise the overall level and reduce system noise (hiss). If

you hear distortion when you play (with a new battery), lower the input trim until

it goes away.

Volume

For the cleanest signal, set this as high as possible without distorting your

amp or mixer.

Optional belt clip

Attaches to the back of the preamp with two screws.

Tone Controls (G II & B II)

The Tone controls are boost/cut shelving style, which means they affect bass and

treble in a way that is both musical and pleasing to your ears. With the sliders

at their center detent positions, the EQ is ﬂat and tone controls are out of the

circuit. Above center is boost and below is cut.

Bass

A boost here will add depth and weight to the sound of an instrument with

light bass response. Lower the bass to tighten up the big boomy tone of a

dreadnought or jumbo guitar.

Treble

A boost here will help to “cut through the mix.” Conversely, lowering the treble

will mellow and subdue your ampliﬁed tone.

Tone Controls (Pro-EQ II)

1. Bass

A boost here will add depth and weight to the sound of an instrument with light

bass response. Lower the bass a few dB to tighten up the big boomy tone of a

dreadnought or jumbo guitar.

2. Middle

Typically, a slight mid cut just will help bring out roundness in the bass and

unmask the treble. A deep midrange cut produces a “scooped out” tone that

works well at high volume levels and can help to reduce feedback.

3. Treble

A boost here will help to “cut through the mix.” Conversely, cutting the treble

will mellow and subdue your ampliﬁed tone.

4. Brilliance

This slider can add shimmer and sparkle to your sound when boosted. Lowering

it can help to reduce ﬁnger noise and fret buzz.

Low battery light (Pro-EQ II only)

This light has two distinct functions:

1. Power up indicator

The low battery LED will ﬂash brieﬂy when the unit turns on.

2. Low battery warning

When the low battery LED lights steadily, it is time to change the battery.

Phase (Pro-EQ II only)

This control works to suppress acoustic feedback and can drastically affect your

ampliﬁed tone. Flip the Phase switch back and forth until you ﬁnd a position that

sounds good and subdues feedback.

Speciﬁcations

Measured with all tone controls at center detent and volume at max.

Nominal Input Level: -20dBV

Input Overload (20 Hz to 20 kHz): +8dBV

Input Impedance: 10MOhm

Output Impedance: Less than 3.5kOhm

Output Level: -20dBV with input gain

control at minimum position

-8dBV with input gain

control at maximum position

THD: .01% at 1kHz, -10dBV input, -4dBV output

Signal to Noise Ratio: 91dB (A weighted, -10dBV input,

-4dBV output)

Power Supply (G II & B II): 9V alkaline battery

(estimated 1400 hours continuous use)

Regulated 9V AC Adapter

Tip = negative 9V

Power Supply (Pro-EQ II): 9V alkaline battery

(estimated 220 hours continuous use)

Regulated 9V AC Adapter

Tip = negative 9V

All speciﬁcations subject to change without notice.

This manual suits for next models

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