Two-Rock ELI 1, ELI 2 Owner's Manual
Two-Rock
ELI 1
ELI 2
OWNERS MANUAL
Thank you for your purchase of a Two-Rock Effects
Loop Interface from K&M Analog Designs, LLC.
As a discerning guitarist, you know the road to
great tone begins with great components.
Our Classic Design, carefully selected parts and
hand-built approach combine to make an extremely
versatile and transparent interface for all outboard effects.
Please take the time to read this manual. We
hope it will answer any questions that you may have.
We extend a warm welcome to you as a member
of a select group of musicians who have chosen a
Two-Rock product.
Effects Loop Interface Overview
The Two-Rock buffered effects loop interface (ELI) is an effective tool for
the guitarist wishing to utilize a myriad of outboard effects with any guitar
amplifier having preamp output and power amp input jacks. Although not
shown in the interconnect diagrams, the unit can also be used at the front
end (preamp) of any guitar amplifier to buffer the signal fed to the amp.
The buffered interface eliminates the insertion loss of effects chains by
eliminating impedance mismatches created by various outboard effects
units. In addition, compensation for hi frequency signal loss resulting from
multiple effects being daisy-chained as well as long cable runs can be im-
plemented.
Signal Processing
There are 2 main sections to the Effects loop interface. The first stage
consists of a high impedance vacuum tube buffer with a +20dB signal in
-
crease capability as well as a high frequency boost via a bright switch if
desired. Signal is then fed to the effects chain.
Signal returning to the unit is processed by a second buffered tube stage
with controllable signal level attenuation and an additional bright switch.
Virtually any combination of effects, even with long cable runs, can ben-
efit from the correct application of this interface. In addition, tone shaping
via EQ and additional gain available can be used to alter or supplement
your sound. Experimentation with signal levels is encouraged as there are
a variety of settings that prove satisfactory.
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