MartinLogan Source Speakers Specifications download pdf (Page 7)

amplifiers of choice do not have the same gain charac-

teristics, then a sonic imbalance will occur.

With horizontal bi-amping, one amplifier drives the high

pass (ESL) section while the second amplifier drives the

low pass (WOOFER) section. To horizontally bi-amp your

Odysseys you must loosen the binding posts and remove

the jumper clips. Connect the low frequency amplifier to

the lower set of binding posts of both speakers. Connect

the high frequency amplifier to the upper set of binding

posts. Next, connect the left and right preamplifier outputs

to the appropriate left and right inputs of both amplifiers

(See Figure 4).

Vertical Passive Bi-Amplification

The very nature of vertical bi-amping dictates that both

amplifiers be identical. With vertical bi-amping, each of the

stereo amplifiers is dedicated to one speaker. For instance,

the left channel of each amplifier drives the low pass

(WOOFER) section while the right channel drives the high

pass (ESL) section. To vertically bi-amp your Odysseys you

must loosen the binding posts and remove the jumper

clips from both speakers. Starting with one speaker, con-

nect the right channel to the lower binding posts and the

left channel to the upper binding posts. Repeat the same

procedure for the other speaker. Connect the left pream-

plifier outputs to both inputs of the left channel amplifier

and the right preamplifier outputs to both inputs of the

right channel speaker (See Figure 5).

Bass Control Switch

On the rear panel of the Odyssey electronics module,

beside

the Signal Input binding posts, is a two position Bass

Control

switch that allows you to select the type of low fre-

quency response you desire.

The flat position is considered the normal setting for most

rooms. However, if you feel that the bass in your system

too strong relative to the mid and high frequencies,

simply

select the -3 dB position. This switch position will decrease

the output of the woofer by 3 dB centered around 150Hz.

Some experimentation with these two switch settings will

allow you to find the optimal tonal balance for your specific

taste, room and equipment.

Figure 4. Horizontal passive bi-amplification. One Channel shown.

High Amplifier

speaker output

Low Amplifier

speaker output

ESL

Woofer

Jumper clips

removed

ODYSSEY

Bass Control

-3dB

flat

Figure 5. Vertical passive bi-amplification. One Channel shown.

Left Channel Amplifier

speaker output

ESL

Woofer

Jumper clips

removed

DYSSEY

Bass Control

-3dB

flat

Operation 7

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MartinLogan Source Speakers Specifications Page 7

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