Fishman PREFIX PLUS-T - SCHEMA User manual

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USER GUIDE

PREFIX PLUS-T

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 to empower you to sound your very best. We are

conﬁdent Preﬁx Plus-T will both enhance and inspire your music making.

3

Quick Start

Before you begin, set the controls as shown:

1. Plug in • Use a ¼-inch instrument cable.

2. Tune up • Press the Tuner button. When

engaged, Tuner

mutes the output. Press again

to exit Tuner.

3. Turn up • Raise the Volume.

4. Pickup tone • Adjust tone controls.

4

Controls

Volume • For the cleanest signal, set the volume knob as high as possible,

without causing distortion or feedback.

Bass • Boost here to add depth and weight to the sound of the guitar.

Middle • Turn the middle knob all the way left for a smooth “scooped out”

tone at high volume levels. Raise the middle knob to the right of center to add

midrange “bite” to the sound.

Treble • Boost to cut through the mix. Cut to mellow and subdue the sound.

Brilliance • This slider can add shimmer and sparkle to your sound. It zeros in

on crisp high frequency tones, the realm of harmonics and acoustic string sound.

Lower the brilliance slider to reduce ﬁnger noise and fret buzz.

Notch • Tune the notch ﬁlter to remove low-end feedback. Raise the volume

until feedback occurs, then slowly turn the notch to the right until the feedback is

eliminated.

5

Tu n e r

Depress the Tuner button to turn the circuit on and off. This digital chromatic

tuner accommodates all standard and alternate tunings and mutes the output

when engaged. It can be activated without an instrument cable connected, in

which case it will turn itself off after three minutes.

Note: the tuner is calibrated to A=440.

6

Phase

Use the Phase switch to improve bass response at low volume and suppress

feedback at high volume. If feedback occurs, push the Phase switch. If feedback

recurs when you change your location, press switch again.

7

Power

Plug in the guitar, and the Preﬁx Plus-T switches on. The Battery LED will ﬂash

once at power-up to tell you the preamp is on.

Low Battery Indicator

When the Battery indicator lights steadily, it is time to change the battery. To

conserve power, unplug the instrument and turn off the tuner when not in use.

Replace the battery by ﬂipping open the preamp body using the latch located at

the top of the preamp. Be sure to observe the correct polarity during this instal-

lation.

8

Sample Settings

Fingerstyle “Scooped” Mid

This will add fullness to the bass This setting emphasizes extreme bass

and deﬁnition to the treble. and treble

9

Strummer Cut Through the Mix

A good setting for strumming chords. When you need to be heard through a

loud band.

10

Electrical Speciﬁcations

Nominal Input Level: -20dBV

Input Impedance: 20MOhm

Output Impedance: Less than 3.5kOhm

Nominal Output Level: -12dBV

THD: Less than .04 %, -20dBV input

Noise Floor: -97dBV

Dynamic range: 104dB

Battery Life: 150hrs. (tuner off)

Notch Filter Range: 30Hz – 300Hz (-15dB)

Bass control frequency: 60Hz

Treble control frequency: 10kHz

Contour control frequency: 250Hz – 3kHz; Q = 0.5

Brilliance control frequency: 10kHz; Q = 0.5

All speciﬁcations subject to change without notice.

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