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r Recommended SA Settings for Biamplification:
1. SUBWOOFER PHASE: O'. lf the main amplifier inverts phase, use 180". lf you are unsure
about this, select the setting that results in higher bass output with the volume control
unchanged.
2. SUBWOOFER VOLUME: Adiust for aecuracy, listening for seamless blending between
upper and lower frequency ranges. When changing electronics, it may become necessary to
re-adjust the SA's volume ievel, since the correct volume setting depends on the sensitivity of
partnering electronics.
3. SATELLITE / HIGH-PASS Fc (High-pass filter): Set to lowest position (50H2 on SA-2;
65Hz on SA-3). THIS SETTING ONLY APPLIES TA BIAMPLIFICATION METHOD #1. IF
YOU ARE USING METHOD #2 OR #3, IGNORE THIS SETTING.
Set the SA's high-pass filter to its lowest setting to ensure that the SA's high-pass filter does
not interfere with the tower speaker's passive crossover. In other words, the SA sends only
information from 50Hz-up to the main amplifier (and consequently the speaker's upper range
drivers). The speaker itself then filters the signal further, according to the low-pass filter
designed into its passive crossover.
4, SUBWOOFER / LOW-PASS Fc (Low-pass filter): Set to highsst position (l50Hz), Setthe
SA's low-pass filtsr to its highest setting so that the SA's low-pass filter does not interfere with
the tower spsaker's passive crossover. In other words, the SA sends only information below
150H2 to the speakels subwoofer section, The speaker itself then filters the signal further,
according to th6 high-pass lilter designed into its passive crossover,
r BassTuning Functions
The following two bass tuning functions can be employed to further "dial in" a tower speaker's
bass response, using the SA's onboard low-pass filter
1. ll there is excessive mid-bass, lower the SA's low-pass setting (SUBWOOFER / LOW-PASS
Fc) until the mid-bass response is smoothed out. Lowering the SA's low-pass setting allows
gradually increased filtering of the bass information before the signal reaches the speaker's
passive crossover network.
2. ll there is not enough low bass output, lower the SA's low-pass setting and increase its vol-
ume. This bass tuning method allows the listener to decrease the mid-bass response, but in
conjunction with increased output from the subwoofer amplifier. This effectively increases the
audibility of low bass information.
3. Experiment with phase.
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