Ta-500, User manual – Turbosound TA-500DP User Manual

Page 66

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user manual

TA-500

TA-500 user manual

Page 66

of performance may be experienced if connected to unbalanced sources. If it is unavoidable,

however, the following wiring convention should be used.

Pin 1

Screen - connect to chassis of the unbalanced equipment,

or left disconnected at the unbalanced end

Pin 2

signal hot

Pin 3

Signal cold

Polarity

In accordance with international standards, T series amplifiers are supplied with Pin 2 hot (+),

so a positive (+V) input gives a positive (+V) output from the positive (+) output terminals.

Input Impedance

Each amplifier channel has an input impedance of 10kΩ, seen between pins 2 & 3 of the XLR.

When used with the LMS-D6 Loudspeaker Management System, distribution amplifiers are
not required when a large number of T-25 or T-45 amplifier inputs are driven in parallel.

Gain and Sensitivity Settings

Gain settings are changed internally by simple jumper links. Two rows of pins marked - GAIN
A and GAIN B - are situated on the input PCB (PCB701). A jumper link sets the gain and the

settings are as follows:

Link 1 & 2

Gives 32dB gain

Link 3 & 4

Gives 26dB gain

Link 2 & 3

Gives approx 37.5dB gain

NOTE: Factory setting is normally link 1 & 2 = 32dB gain.

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