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Setup of the Subwoofer Amplifier
Proper setup of the subwoofer amplifier in Strata Mini loudspeakers ensures that the
blend of low to high frequency will be optimized when you finally sit down to enjoy them.
Setting the Subwoofer Level
Although you
can
setup levels by ear, accurate calibration of subwoofer
levels relative to the other speakers in the Strata Mini require an SPL
meter. Radio Shack sells a digital meter that works very well for this
purpose (P/N 33-2055) and it’s about $50. Set the meter on ‘slow’ and
“C” weighting. The dial should be set at either 70 or 80 depending on
your preamplifier/processor or receiver’s test tone reference output level.
Consult your owner’s manual to determine what reference point your unit
uses (most use 75, so the 70 setting on the meter would be appropriate
in that example). If you do not have a built in test tone generator, you
can use a test CD that contains Pink Noise.
Each range setting on the Radio Shack 33-2055 meter will cover 20dB (10 above and
10 below). So a setting of 70dB would cover between 60-80dB range. If you are using
another meter, consult the owner’s manual for proper operation.
Configuration and Reference Settings
1) Begin by reviewing the calibration menu settings of your receiver or preamplifier/
processor. If there is a speaker configuration menu, be sure the outputs for Strata Mini
speakers are set to “LARGE”.
2) Unplug the subwoofer input on each Strata Mini speaker. Exactly how this is done
depends on whether you are using line level or speaker level inputs.
Establishing the Reference Levels of the Full Range Speakers
3) Set the volume control on your preamplifier/processor to the “00 dB” level. If your
unit uses a positive number scale for volume instead of a minus-to-plus scale,
just watch the meter until it reaches 75 or 85dB (depending on the recommended
reference level of 70 or 80dB in the receiver or preamplifier/processor’s owner’s
manual). Note this volume position because you will need to get back to it shortly.
4) Turn the volume way down and unplug the binding posts inputs that feed the high
frequency speakers on both of the Strata Minis.
Setting Subwoofer Level
5) Reconnect the subwoofer inputs that you disconnected in Step 2 to both Strata Mini
loudspeakers.
6) The crossover on the each Rocket Strata Mini subwoofer should be set between 80Hz
to 100 Hz as a starting point unless you have used the LFE Subwoofer Output on your
preamp/processor) - in which case the crossover will be left at the highest setting.
Radio Shack
Digital SPL
Meter
Summary of Contents for Strata mini
Page 1: ...Enjoyment Guide...
