NAD M3 Owner's Manual page 12

Setup
About the M3 Dual Mono Integrated Amplifier:
12
REAR PANEL CONNECTIONS AND CONTROLS (FIGURE 2)
1. DISC: Connect line-level audio Left and Right to this input from a video disc or DVD-player.
2. CD: Connect line-level audio Left and Right to this input from a CD-player
3. TUNER: Connect line-level audio Left and Right to this input from a tuner (radio).
4. INPUT 4-6: Connect any audio source to these line-level audio Left and Right inputs.
Reassign new names by following the Assigning User Names procedure under the Front
Panel Controls section.
5. BALANCED: Connect XLR audio source to these inputs. Make sure the configuration is
standard as follows; pin 1 is chassis ground (earth), pin 2 is signal live, and pin 3 is signal
return. Reassign a name to this input by following the Assigning User Names procedure
under the Front Panel Controls section.
6. MAIN IN/PRE OUT 1: The primary link between the M3's dual mono-block preamplifier
and dual mono-block amplifier is by these jumpers. This connection supplies the full
frequency range output.
NOTE: The biamp (Crossover Frequency Selection) settings do not affect this output.
PRE OUT 2: This secondary preamplifier output follows the volume level of the PRE OUT 1.
Adjust the biamp high pass frequency settings for PRE OUT 2 using the biamp (Crossover
Frequency Selection) to match the frequency response of the speakers connected to the
M3's speakers A or B terminals.
Biamp Connection: If you choose to use the biamp feature of the M3 first power off the
M3, and then disconnect the M3 from the mains voltage. Disconnect the MAIN
IN/PREOUT 1 jumper (Figure 9-1) for each channel. Connect the PRE OUT 1 output left
and right to an active subwoofer (Figure 9-2) using high quality RCA-type patch cables.
Using a set of short high quality RCA-type patch cables, jumper from PREOUT 2 to MAIN
IN both left and right channels (Figure 9-3).
If available on the subwoofer, match the subwoofer crossover settings with the biamp
crossover settings of the PRE OUT 2. Refer to Front Panel Controls section biamp control,
for the selection of crossover frequencies available.
FIGURE 9
1
INPUT 6 MAIN IN PRE-OUT 1 PRE-OUT 2 REC/Z2
L L
R R
L
ED INPUT
+ 12V TRIGGER RS-232
OUT
R
SUBW
L
2
INPUT 6 REC/Z2
MAIN IN PRE-OUT 1 PRE-OUT 2
L L
R R
L
ED INPUT ED INPUT
+ 12V TRIGGER RS-232
OUT
R
SUBW
L
3
INPUT 6 REC/Z2
MAIN IN PRE-OUT 1 PRE-OUT 2
RCA Jumpers
L L
RCA Jumpers
R R
L
+ 12V TRIGGER RS-232
OUT