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#1: Integrated Amp or Receiver
WITHOUT subwoofer
(or preamp) outputs
Connection using
speaker cables & speaker level converters. Also
used for stereo subs.
Please note: For the sake of clarity, only one channel is
shown.
This is
sometimes referred to as "bass augmentation". The main
speakers are run full-range and the subwoofer is used to augment or
fill in just the lower bass. Connect a second set of speaker cables
in parallel with your existing speaker cables. This set of cables is
run to our speaker level converters, which plug into the subwoofer
left and right inputs. (If using stereo subs you will run one cable
to each sub). Set crossover, the input level, and phase control to get a seamless blend with your main speakers.
#2: Integrated Amp or Receiver
WITHOUT subwoofer (or preamp)
outputs
Same as # 1 but using shielded RCA interconnects
instead of speaker cables. Also used for stereo subs. (Preferred over #1 in situations where noise or hum pickup
might be a concern).
Please note: For the sake of clarity, only one channel is
shown.
Connect
speaker level converters in parallel with your main speakers.
Connect a female to female RCA adapter to the speaker level
converter and use shielded RCA interconnect cables to connect to the
subwoofer. (If using stereo subs you will run one interconnect to
each sub.) (DH Labs Subsonic Cable is perfect for this
application.)
#3: Integrated Amp or Receiver WITH preamp outputs and main
amp inputs
Please note: For the sake of clarity, only one channel is
shown.
Use Y-Adapters to split the signals from the left and right
preamp outputs. Connect one end of each Y-Adapter to left or right
main amp input, (using a short RCA interconnect). Use proper lengths
of shielded interconnects to connect the other ends of the
Y-Adapters to the right & left inputs on the sub. (If using
stereo subs you will run one interconnect to each sub).
Your main speakers will receive a full range signal. To reduce low
frequency content to your main amp and speakers, use optional High
Pass Filters plugged into the main amp inputs.
#4: Separate Preamp & Amp
Please note: For the sake of clarity, only one channel is
shown.
Shown with
Y-Adapters. If your preamp has two sets of outputs you will not need
the Y-Adapters. Use proper lengths of shielded interconnects to
connect one set of outputs to your main amplifier and one set of
outputs to your sub left and right inputs. (If using stereo subs you
will run one interconnect to each sub).
Your main speakers will receive a full range signal. To reduce
low frequency content to your main amp and speakers, use optional
High Pass Filters plugged into the main amp inputs.
Stereo (Two-Channel) - Adjustments
Adjusting the Maestro XL for Stereo:
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Set Initial Adjustments: Crossover
frequency: 80Hz, Phase: 0 degrees with lowpass, Level: 1/2
way.
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Adjust Phase: Adjust volume level
so sub is audible with an 80Hz test tone from the included
test CD. Switch between 0 and 180 degrees to find maximum
output at the listening position. This is most easily
accomplished with an extra person to work the switch /
control. If using an SPL meter such as the Radio Shack, it
might be easier to track the change with the 80Hz Warble
tone rather tha the 80Hz Sinewave.
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Adjust Level: Start with input
level all the way down and set crossover frequency filter
to 35Hz. As you play music with a repetitious bass line,
adjust the input level upward until it is just
consistently audible. The low bass should fill in
naturally. You are looking for bass that goes deeper, not
necessarily louder.
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Adjust Crossover Frequency: With
the frequency filter at 35Hz, gradually adjust upward
until the bass seems full, without any missing notes, and
then back off just a bit. Adjust up or down until the
subwoofer best matches the cutoff of your main speakers.
The most natural results will be with the lowest crossover
point that doesn't leave a "gap" in the
response. Lower crossovers will allow the subwoofer to
audibly "disappear" and placement is less
critical.
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Fine-tune: Sit back and listen with
a variety of music. Make any changes on at a time to fully
assess the effect. Take your time!
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