Chandler Limited AMP/DI User Manual

Thank you for purchasing the Chandler Limited Germanium Pre amp/DI. This unit is proudly hand
wired and assembled in the USA. This unit is made with a 100% discrete transistor circuit and
specially wound transformers. Included are item descriptions and hints to get you on your way.

Connections - All connections on the Germanium are transformer balanced with pin 2 hot.

Power supply - This is designed to be used with Chandler Limited PSU-1 MKII power supply.

The power pin out is as follows:

1) chassis and audio ground

2) 48 volt

3) +28 volt

4) -28 volt

Notes on Grounding - The back of the power supply has two black banana connectors. These

join the audio ground to the earth ground with a solid wire between them. Depending on your studio
you may want to connect or disconnect this. Turn up your monitors or headphones to experiment
with which has a lower noise floor in your system. You may also need to join the audio banana plug
to other sections of your studio to obtain the lowest noise floor. The connectors are located near the
closest edge of the power supply case. Use something simple, like a guitar cord, and touch the tip
to other portions of your studio to find the best results.

GERMANIUM PRE AMP/DI

For peak performance, please allow the unit to warm up for at least 25 minutes before use.

Prior to sending in your gear for repair, please contact our shop at the number below. We will assist
you in troubleshooting the problem and if needed, we will issue you an RMA# to send in the gear.

Please feel free to call our shop anytime for help or questions.

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."