Dual Monaural Power Amplifiers Operating Manual N 333 N 332 N 331

3 CONNECT ONE END OF THE BALANCED BRIDGING OUTPUT ADAPTER

TO TWO SIDE-BY-SIDE BLACK OUTPUT TERMINALS

All Mark Levinson amplifiers have two sets of output terminals per channel,

wired in parallel (for convenience when biwiring). You may use either the

upper or the lower black output terminals. Connect one end of the Bal-

anced Bridging Output Adapter to a black output terminal on one side of

the amplifier, and then connect the other end to a black output terminal on

the other side of the amplifier. (The two connections should be side-by-

side rather than one above the other.) Make sure these connection are snug

and secure.

4 CONNECT YOUR LOUDSPEAKER WIRE ACROSS TWO SIDE-BY-SIDE, RED

OUTPUT TERMINALS

In this case, you may use either the upper or the lower red output termi-

nals. Connect the positive/+/red binding post of your loudspeaker to the

red output terminal associated with the red (normal) side of the Input

Adapter. Connect the negative/–/black binding post of your loudspeaker to

the red output terminal on the other side of the amplifier, the one associ-

ated with the black (inverted) side of the Input Adapter.

Following this connection convention preserves the polarity of the signal

sent to the loudspeaker. In practice, the most important thing is to be con-

sistent throughout the system, as inconsistency will result in out-of-phase

loudspeakers. In turn, this results in unstable imaging and poor bass repro-

duction. (The effect is not dangerous, but neither is it subtle.)

5 CONNECT ONE OUTPUT CHANNEL OF YOUR PREAMPLIFIER TO THE IN-

PUT OF YOUR BRIDGED AMPLIFIER

The female XLR at the junction of the Balanced Bridging Input Adapter is

now the single input to this bridged amplifier.

6 POWER UP YOUR AMPLIFIER

Remember that your Mark Levinson power amplifier incorporates inrush

protection circuitry that allows its power supply to charge up gently, en-

hancing its longevity. Plug the amplifier back into the AC mains; press the

standby button once to bring the amp from off to standby; wait at least ten

seconds; and press the standby button again to bring it from standby to

operate.

7 REPEAT THIS PROCESS WITH YOUR OTHER AMPLIFIER(S)

Single-Ended Bridging If your preamplifier has only single-ended (RCA) outputs, a few details of

bridged operation will differ from the discussion above, all pertaining to the con-

nection of the preamp to the bridged amplifiers. For this discussion, we will as-

sume that you are using a Madrigal Single-Ended Bridging Adapter Kit for each

channel to be bridged. (Alternatively, you may have custom cables built using

your preferred wire and connectors, being careful to follow the wiring diagram

below.)