Rear Panel

			right	right
			rec out 1	rec out 2
right balanced	right balanced	right balanced
main out	input 1	input 2
	PUSH	PUSH	right	right
	right main out		input 3	input 4

c o m m u n i c a t i o n p o r t s
slave	external	master

right	right	left		left
input 5	input 6	input	6	input	5

left	left
rec out 2	rec out 1
left	left
input 4	input 3

	PREAMPLIFIER Nº380S
	designed and manufactured in U . S . A .
	by MADRIGAL	S/N
	by MADRIGAL	S/N

left balanced		left balanced		left balanced
	input 2	input 1		main out
	PUSH	PUSH
			left main out

Note: All left-channel inputs and outputs are on the left of the rear panel as seen from the front, and all right-channel inputs and outputs are on the right of the rear panel as seen from the front. This design minimizes any possible confusion when changing connections once the unit is installed, while also maximizing channel separation in this dual monaural preamplifier.

1BALANCED MAIN OUTPUTS

If your power amplifier is equipped with balanced (sometimes called “dif- ferential”) inputs, it is best to use these balanced outputs on your Nº380S. A balanced signal from preamplifier to power amplifier will offer the highest possible performance with the best immunity from common-mode noise, such as radio frequency interference (RFI). The balanced output signal is made available by way of precision male XLR connectors (requiring female XLRs on the preamplifier end of the interconnecting cable).

The pin assignments of these XLR-type male outputs are:

	Pin 1: Signal ground
1 2	Pin 2: Signal + (non-inverting)

3Pin 3: Signal – (inverting)

Connector ground lug: chassis ground

Refer to your power amplifier’s operating manual to verify that the pin as- signments of its input connectors correspond to the Nº380S. If not, wire the cable so that the appropriate output pin connects to the equivalent input pin.

Connect the right-channel and left-channel balanced main outputs of the Nº380S to the appropriate balanced inputs of the power amplifier.