Anthony Gallo Reference 3 S.A. Amp - Manual (Page 7)

two individual speaker cables (one for each MPSB/DV) which are terminated with bare wire/bananas/spades on
the SA end and a ¼” plug on the subwoofer end. You won’t be making a double connection (full-range + 2
nd
voice
coil as on the Ref3s) but merely need a single cable to each subwoofer.
3/ Non-Gallo bi-wirable speakers + Reference³ SA xover/amplifier:
Connecting the SA to the woofer section of other makers’ bi-wirable speakers
The SA is ideally suited to actively bi-amplify multi-way speakers with a second set of loudspeaker
terminals for their bass sections. Because such woofer circuits will already include their own internal crossover
network, run the SA in full-range mode (crossover bypassed). Then use the SA’s gain controls to match your
speakers’ bass performance to their midrange and treble as driven by your main amplifier. If your
preamp/integrated lacks a second set of pre-outs, use the included Y adaptor. If your speakers connect their
woofers out-of-phase with the midrange/tweeter, be sure to set the SA phase controls to 180.
Since other speakers lack our Ref³s twin-drive woofer scheme, you can’t boost their bass performance via
any 2
nd
voice coils. In the absence of this unique Gallo feature, the SA’s EQ boost now becomes your unique tool
whereby to augment the bass reach below your speakers’ natural roll-off frequency, thus turning them into more
full-range designs than even their own designer dreamed of. Experiment by ear to achieve the most pleasing and
extended response.
4/ Non-Gallo subwoofers + Reference³ SA xover/amplifier:
Connecting the SA to a passive subwoofer or two
The SA can be used to power one or two passive subwoofers by other makers. Select mono operation for a
single sub, stereo operation for two subs and set the SA to low-pass. Take your SA input signal from either a
second (or Y’d) pre-out of your preamp/integrated or HomeTheater receiver. Connect the subwoofer/s from the
SA’s speaker outputs. In mono operation, you’ll use only the left gain and phase control. Refer to the rear panel
silk screen on how to make the mono speaker connection across the two red terminals.
To determine the best placement for your subwoofer, set the SA phase control to 0 and the subwoofer into
your listening position. Then walk your room while playing bass-heavy music to determine in which place you
hear the loudest and most even bass response from the subwoofer. Place the subwoofer into that spot. Now
experiment with the SA’s phase and volume controls to achieve the most seamless blend between your main
speakers and subwoofer/s.
5/ Non-Gallo passive speakers + Reference³ SA xover/amplifier:
In full-range mode (internal crossover bypassed), the SA can be used as either a high-quality stand-alone
amplifier or a single-input integrated amplifier. Simply connect your source outputs or preamp pre-outs to the RCA
inputs and your speakers to the SA’s speaker binding posts. If you use a preamp, set the SA gain controls to max to
let your preamp master volume handle the playback level. If you don’t use a preamp, the SA gain controls become
your dual-mono master volume. Now make sure to set the SA volume controls in their full counter-clockwise or 0
position before you select ‘play’ on your source for the first time. This will avoid excessive playback volumes until
you learn what setting on the SA equates to average sound pressure levels in your room. Remember, the SA is a
240wpc stereo amp. With that amount of power, it will play louder than you might expect so a little movement on
the volume controls could go much farther than you think until you learn from experience.