Manual

Horizontal Passive Bi-Amplification

Horizontal bi-amping allows you to use two differ-

ent types, models or brands of amplifiers (i.e. tubes

on top, transistor on the bottom). However, we rec-

ommend that you use two identical amplifiers (i.e.

same brand and model). If you must use two differ-

ent amplifiers, it is essential that they have the same

gain or that one of the two have adjustable gain

so that you can match their gain characteristics. If

the amplifiers of choice do not have the same gain

characteristics, then a sonic imbalance will occur.

With horizontal bi-amping, one amplifier drives the

high-frequency section of the speaker while the sec-

ond amplifier drives the low-frequency section. To

horizontally bi-amp your speakers 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 (Fig. 3).

Vertical Passive Bi-Amplification

The very nature of vertical bi-amping dictates that

both amplifiers be identical. With vertical bi-amp-

ing, each of the stereo amplifiers is dedicated to

one speaker. For instance, the left channel of each

amplifier drives the low-frequency section while the

right channel drives the high-frequency section. To

vertically bi-amp your speakers you must loosen the

binding posts and remove the jumper clips from

both speakers. Starting with one speaker, connect

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 preamplifier outputs to both inputs of the left

channel amplifier and the right preamplifier outputs

to both inputs of the right channel amplifier (Fig. 4).

ACTIVE BI-AMPLIFICATION

We do not recommend active bi-amplification. The

internal crossover can not be bypassed. This con-

nection method seriously degrades performance.

Fig. 3: Horizontal bi-amplification connection.

One channel shown.

Fig. 4: Vertical bi-amplification connection.

One channel shown.