K&K Sound Trinity Pro Preamp Manual

K&K Sound Ikke kategoriseret Trinity Pro Preamp

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92798 Cape Arago Hwy, Coos Bay, OR 97420 | 541-888-3517 | Toll Free 1-800-867-6863 | kksound.com

TRINITY PRO PREAMP

This 2-channel preamp is an extremely powerful yet

small mixer in a belt clip box. It is designed for

mixing a combination of a transducer and an

electret condenser microphone on one instrument to

achieve the best possible transmission.

It offers volume, gain, bass, mid, and treble controls

on each individual channel, and a phase switch on

the mic channel. The tone controls feature an

extended range of up to +/- 20 dB, which exceeds

many mixers on the market today. To keep the box

as small as possible, the gain and tone controls are

trim pots inside the unit (small potentiometers for

adjustment with a supplied tiny screwdriver).

During performance, the musician can conveniently

balance the two channels on the volume control

knobs.

Before first use, please insert a 9-volt battery. To

switch the battery off, always unplug the

MAIN/MIX OUT jack.

SETTING UP YOUR PREAMP

1. Remove the snap-off lid by simply lifting it

off. There is no need to undo any screws.

Important: Please do not tamper with the

screw on the bottom of the preamp!

2. Insert 9-volt battery into the designated

compartment.

3. There is a diagram for the internal trim pot

controls on the inside of the lid. In the box

you will find a little screwdriver for the

adjustment of the trim pots. It is attached

with a velcro fastener.

4. Connect your pickups to the stereo input via

a shielded ¼” stereo cable (not supplied)

and connect MONO/MIX OUT via a mono ¼”

guitar cable into an amplifier.

5. If a second mono cable is inserted into MIC

OUT, the channels will be carried

separately. In other words, MIC OUT will

carry only the microphone and MAIN/MIX

OUT will carry only the pickup. A cable must

be inserted in the MAIN/MIX OUT in order

to switch on the battery power.

6. Set your amp to a flat setting first. Our

preamps are shipped with a factory setting

that gets you started. Adjust the gain trim pot

the transducer channel. Adjust bass and

treble trim pots to your preference.

HOW THE PHASE SWITCH WORKS

The Trinity Pro Preamp has a miniature phase

switch mounted inside, next to the battery. It is a

sliding switch and you can slide the little tab up or

down with your finger. There are only two settings.

Phase switches are usually marketed as a feedback-

controlling device, but they accomplish more than

just that. Phase determines at what point in time a

sound wave has its peak or trough.

This picture shows two (basically identical) waves,

but the wave on the right (2) is inverted with respect

to the wave on the left (1). Interestingly, if these two

waves were played back simultaneously from the

same speaker source with the same volume, they

would completely cancel each other out and no

sound would be heard. There would be silence.

You know when an amplified signal just doesn’t

“sound right”? In a dual-source system, chances are

it’s a phase-match problem when the sound waves

coming from one source are partially canceling out

the waves coming from another source.

In pickup/mic combination systems, it’s actually a

very common problem that the mic is out of phase

with the pickup. The phase switch allows you to

simply “flip” the sound waves of the mic so that

they match the pickup. The result is that “aaaaahh”

smooth tone that just sounds right.

An out-of-phase problem is indicated by early

feedback and tinny, unbalanced sound. This may be

tolerable in some tone ranges (positions on the fret

board) and quite noticeable in others, even resulting

in sound cancellations on some notes.

The phase switch allows for instant correction of this

problem. By toggling the phase switch back and

forth, you will notice fuller, warmer and nicely

balanced tone with less feedback in one setting.

This is the correct phase switch setting. Keep in

mind that it may be different with different

amplification systems.

PREAMP TECHNICAL DATA

Frequency response: 10-30,000 Hz

Inputs: Instrument jacks 1 Mega Ohm

Output: Instrument jack 10 Kilo Ohm

Battery consumption: 4.5 Milli Amp

Battery life: about 50 hours

All K&K products are designed, assembled and

packaged in USA using mainly US and European

components. Thanks again for choosing K&K.

Produkt Specifikationer

Mærke:	K&K Sound
Kategori:	Ikke kategoriseret
Model:	Trinity Pro Preamp

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