Diamond MICROV2 Series Owner's Manual page 8

SET UP
Placing the x-over switch in the FULL position (MICRO4V2/MICRO5V2) sets the amplifier to Full Range. This setting allows
ALL frequencies to pass to the speakers. With the MICRO4V2/MICRO5V2, Placing the
switch in the HP or LP position activates the 12dB crossover, adjustable from 40Hz -
400Hz. . The MICRO1V2 mono is dedicated for Low Pass (LP) only with an adjustable
frequency from 40Hz - 400Hz. The MICRO5V2 (5 channel) amplifier offers full range
(FULL) or high pass (HP) selector switch for channels 1-4. Selecting the high pass
(HP) will activate a fixed 70Hz cross over for full range speakers. Channel 5 (on
MICRO5V2) is dedicated for subwoofers only but offers an adjustable LP crossover
from 25Hz – 250Hz.
Placing the switch in the HP sets the amplifier to the High Pass Filter mode, enabling frequencies above the cutoff point to
pass. Placing the switch in the LP position sets the amplifier to the Low Pass Filter mode, enabling frequencies below the cutoff
point to pass. For system tuning begin with the frequency set at approximately 80Hz and fine tune up or down based on
music choice and input level.
To adjust the gain setting, turn the amplifier gains all the way down (counterclockwise). If using a remote level control
(MICRO1V2/MICRO5V2), plug the level control into the amplifier and turn it to about "HALF-WAY" (approx. the 12 O'clock
position) this setups the bass boost so you can turn it UP ..OR...turn it DOWN when playing different music styles. Next turn
the source unit volume up to almost full volume (usually about 2/3rds of the way up) or until the output starts to distort on
an oscilloscope. This will be NEARLY full volume on most source units, perhaps one or two "clicks" down from maximum
volume. Next, increase the amplifier gain setting until adequate volume is achieved, or until distortion is audible and then turn
it down a bit until the distortion is inaudible.
The HP or LP crossover adjustment can now be fine tuned. If you are using the amplifier in a HP configuration and would like
the system to be a little bit louder you can increase the HP Filter frequency and reset the "Gain" of the amplifier. Raising the
HP frequency up to high however will cause a loss of mid range and bass. If you are using the amplifier in a HP filter configura-
tion and you hear voice or vocals coming from your subwoofer system you can turn the LP Filter frequency down (lower).
After setting the input gain adjustment and crossover, you may choose to add a small amount of "Bass Boost" (MICRO1V2)
in the low frequency region. Remember that the Bass Boost feature will not fix a poorly designed subwoofer enclosure or
subwoofers that didn't sound good to begin with.
1. Make sure any bass EQ or low frequency equalization from the source unit is set to OFF or FLAT.
2. While playing the same musical selections used during the gain setting process, slowly increase the level of the Bass EQ.
You should be able to notice a obvious change between 0 and +12dB. If you do not notice much difference, then it will
not serve any benefit to increase the boost further. 3. If the boost has audible benefits without adding appreciable
distortion, find a level that suits your taste. Remember: it's much easier to construct the right subwoofer enclosure for
your listening preferences than relying on a bass boost control to do the job!
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