MartinLogan Sequel II - Manual (Page 12)

Page 12 Sequel II User's Manual
Operation
Figure 3. Horizontal Passive Bi-amplification. One channel shown.
Passive Bi-Amplification Passive Bi-Amplification Passive Bi-Amplification Passive Bi-Amplification Passive Bi-Amplification
For those of you that desire ultimate perfor-
mance, the Sequel II may be passively bi-
amplified using the existing internal passive
crossover elements.
WARNING! WARNING! WARNING! WARNING! WARNING!
Only after the jumper clips are removed
may you connect individual runs of speaker
cable from your amplifiers to the High-pass
and Low-pass Signal Input binding posts.
Damage will occur to your amplifiers if the
jumper clips are not removed!
This method takes the bi-wiring concept one
step further. Now you will have a dedicated
channel of amplification directly connected
to the high and low pass sections of the
Sequel II crossover. There are two different
methods for bi-amping with two stereo
amplifiers. The first and most common is
referred to as Horizontal Bi-amping
Horizontal Bi-amping Horizontal Bi-amping Horizontal Bi-amping Horizontal Bi-amping. The second method
is referred to as Vertical Bi-amping Vertical Bi-amping Vertical Bi-amping Vertical Bi-amping Vertical Bi-amping. With either method
you may use two stereo amplifiers or four mono amplifiers, or
two mono amplifiers and one stereo amplifier. Get the
idea? With either form of passive bi-amplification, your pre-
amplifier must have dual outputs. If your pre-amplifier is not
so equipped, you must either purchase or construct a "Y"
adaptor.
Horizontal Bi-amping Horizontal Bi-amping Horizontal Bi-amping Horizontal Bi-amping Horizontal Bi-amping allows you to use two different
types, models or brands of amplifiers (i.e. tubes on top,
transistor on the bottom). However, we recommend that you
use two identical amplifiers (i.e. same brand and model). If
you must use two different 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 character-
istics, then a sonic imbalance will occur.
With Horizontal Bi-amping Horizontal Bi-amping Horizontal Bi-amping Horizontal Bi-amping Horizontal Bi-amping, one amplifier drives the high
pass section while the second amplifier drives the low pass
section. To Horizontally Bi-amp Horizontally Bi-amp Horizontally Bi-amp Horizontally Bi-amp Horizontally Bi-amp your Sequel II's you must
loosen the 5-way binding posts and remove the jumper clips.
Connect the low frequency amplifier to the LO+
LO+ LO+ LO+ LO+ and LO- LO- LO- LO- LO-
binding posts of both speakers. Connect the high frequency
amplifier to the HI+
HI+ HI+ HI+ HI+ and HI- HI- HI- HI- HI- binding posts. Next connect the
left and right preamplifier outputs to the appropriate left and
right inputs of both amplifiers (See Figure 3).