Ashly TRA-4150 Manual de instruções - Página 7

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REAR PANEL FEATURES

7.1

The Powerflex inputs use 1/4" tip-ring-sleeve (TRS) phone jacks, balanced XLR jacks, and balanced two piece

"Euroblock" style connectors. The three types of connectors are wired in parallel and may be used balanced or unbal-

anced. Use the euro-block connectors to daisy-chain multiple amps together . Input XLR jacks are pin 2 hot (+),

meaning that a positive voltage applied to pin 2 will result in a positive output voltage across the speaker terminals. Pin

2 of the XLR jack is equivalent to the tip of the 1/4" TRS jack.

Balanced Inputs

It is recommended that balanced input connections

be used whenever possible to take full advantage of the

amplifier's common mode rejection properties, and to reduce

ground-loop problems. The (+) signal is on pin 2 of the XLR,

and the tip of the phone jack. The (-) signal is on pin 3 of the

XLR, and the ring of the phone jack. If a hum problem per-

sists, try connecting a balanced signal to the Euroblock input

with the input cable's shield lifted at the amplifier end of the

cable (ie. no ground connection), but connected to ground at

the signal source. This eliminates potential ground currents

through the input cable yet preserves the benefits of shield-

ing.

Unbalanced Inputs

If an unbalanced XLR input connection is used, pin 3

should be connected to input ground (pin 1). If the 1/4" input

jack is used unbalanced, the use of a mono (tip-sleeve) plug

will automatically tie the (-) connection to input ground. Note:

Never float the (+) or (-) input connection when using an un-

balanced source. If connecting an unbalanced signal to the

Euroblock input, connect the signal to (+) and the cable shield

to both (-) and ground.

Operating Manual - Powerflex Multi-Channel Power Amplifier

* Powerflex 6250 shown - Powerflex 4400

only has channels 1-4.

Balanced Audio Connections

Unbalanced Audio Connections