Madrigal Imaging Dual Monaural Power Amplifier User Manual download pdf (Page 10)

If your preamplifier is equipped with a balanced main output, it's best

to wire the Nº29 for balanced operation, particularly if long cable

lengths are required between the preamplifier and the Nº29. (See

Figure 3 for the pin assignments of the Nº29's XLR-type inputs.)

Connect the XLR-type male line-mount connector to the preamplifier,

carefully observing pin assignments. (Refer to your preamplifier's

operating manual to verify that the pin assignments of its output

correspond to the diagram above. If they don't, wire the connector so

that the appropriate output pin connects to the equivalent input pin.)

When complete, connect the main outputs of the preamplifier to the

left- and right-channel XLR-type inputs on the rear panel of the Nº29.

Be sure to remove the shorting strap between Pins 1 and 3 before

inserting the output cable connectors.

Note: For proper balanced operation, no connector (pre-

shorted or otherwise) should be inserted into the RCA-type

inputs on the rear panel of the Nº29.

Balanced normal

(non-inverting) operation

+ – – +

– ++ –

Left

Loudspeaker

Right

Loudspeaker

Nº29

From preamplifier

balanced

main output

PUSHPUSH

Right

channel

Left

channel

Figure 5: Connections for

balanced normal

(non-inverting) operation

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 19 20

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Madrigal Imaging Dual Monaural Power Amplifier User Manual Page 10