pT2-500 Microphone Preamplifier OPERATION MANUAL
Version 1.0 9 ©2010 TRUE SYSTEMS
A Word About Cables…
Most users of the pT2-500 have invested much time and money in their selection of
microphones and preamplifiers. We recommend that you give some consideration to the
microphone, instrument and output cables you select, as well.
Use high-quality, low capacitance cable. Braided shielding and “star quad” type mic
cables will perform better in electrically noisy environments. Manufacturers such as
Canare, Mogami (and others) make high performance cable of this type.
Some “house brand” cables are made by quality manufacturers, but others can be
inferior. Be careful. Use cables with high-quality connectors (Neutrik, Switchcraft,
etc.).
Our studio testing has shown that some of the more esoteric guitar/instrument
“super-cables” do, indeed, sound better. Noticeable improvement, but at a stiff price.
Try before you buy!
Avoid excessive cable length.
Replace damaged connectors.
Cable Types
There are two styles of audio cables used for connections to the pT2-500 in a 500-
series rack:
Shielded / single-conductor type for unbalanced signals (Instrument cables)
Shielded / twisted-pair type for balanced signals ( Microphone / Line level cables)
We recommend that all interconnecting cables are wired according to the following
standards. Failure to do this can result in malfunction or audible distortion.
For Instrument cables (unbalanced)
on TS connectors:
Tip = positive (+) signal
Sleeve = shield
TS connector (¼” plug, mono)
For Microphone and Line level cables (balanced)
on XLR connectors:
Pin 1 = shield
Pin 2 = positive (+) signal
Pin 3 = negative (-) signal
female male
XLR connector (front side)
Output cable connection – unbalanced
NOTE: When connecting an XLR output from
to a subsequent
audio device with an unbalanced input, the negative signal lead (from Pin 3)
must be wired to shield (Sleeve) at the TS connector. For this type of
connection, the Maximum Output Level is reduced to +23dBu.
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