Chandler Limited AMP/DI - Manual (Page 2)

Controls and Features
GAIN/GERMANIUM DRIVE - This is your standard input gain control. It is a 10-position Elma
switch with 3db step increments. The full range of the unit is -5db, with the pad, to +65db, without the
pad and Germanium Drive and Feedback at full. The actual amount of overall gain, however, is affected
by feedback control. When the gain is at 0 and the feedback is at 0, the overall gain is +10db.
Increasing the feedback to 10 changes the overall gain to +40db, with all the tonal changes described
under the feedback control. Using different combinations of feedback and input gain is essential if you
want to take advantage of all the tones available from the Germanium pre amp.
FEEDBACK - The Feedback control is essential to the sound and function of this pre amp.
Audio amplifiers incorporate some amount of negative feedback which is where the output signal
of the amplifier is fed back to its input. This affects the sound and function of the amplifier in many
ways. THD, frequency response, gain, and amplifier stabilization change considerably with varying
feedback.
In use you will find these results: When feedback is at 0 the unit will produce more high frequency
information, less THD, less gain, and generally a more pristine clear tone. Pushing the feedback higher
will add THD, gain, a small bass rise, and a small hi end roll off.
PAD - A 15db pad switch. Do not be afraid to use the pad on the unit as you will not find the
adverse effects associated with many pads. The pad is also very helpful with discovering all the tonal
variations the Germanium is capable of producing. Use the pad when you are driving the Germanium
very hard to keep the output levels in a usable range. Another important use for the PAD is to drop
the gain to a line level while sending tape/disk tracks or line sources into the transformer balanced
rear input.
THICK - The thick switch adds a gentle low end rise to the signal. It sounds simple but all of our
beta testers commented about this being their favorite part of the unit. One said "Why don’t you just
wire it in permanently?" "It's great for making large, meaty guitars."