Set Up
8
The crossovers are ALWAYS engaged. Meaning “ON” ..you CANNOT turn them off. It is NOT an issue as the lowest HPF
Frequency is 15Hz(CVPM4004D) which is, in reality, fis ull range. The HPF is used to protect Coaxial and Component
speakers from damage. In actuallity NO Co-axial or Component speaker system is “full range”. Be careful and protect
your speakers. Begin by tuning the HPF frequency control between 60Hz and 80Hz for your Hi Pass Speakers (coaxial
or Component).
On the other hand the LPF control (only on the CVPM10001D amplifier) enables frequencies below the cutoff point to
pass. For a subwoofer system begin tuning with the frequency set between 80Hz and 120Hz.
To adjust the gain setting, turn the amplifier gains all the way down (counterclockwise). If using a remote level control
(CVPM10001D/CVPM4004D) plug the remote level control into the amplifier and turn it to about 1/2 way up. 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.
NOTE:
Ideal signal to noise and dynamic range are achieved with the gain at minimum. Most users find adequate gain and volume
is achieved at less than halfway in the adjustment range. Avoid setting the amplifier gain very high as noise and distortion will
increase significantly. For a more in depth level setting (gain adjustment) procedure AND system designs, visit the CVM website.
The HPF or LPF crossover adjustment can now be fine tuned. If you are using the amplifier in a HPF configuration and would like
the system to be a little bit louder you can increse the HP Filter frequency and reset the “Gain” of the amplifier. Raising the HPF
frequency up too high, however will cause a loss of mid range and bass. If you are using the amplifier in a HPF filter configuration
and you hear voice or vocals coming from your subwoofer system you can turn the LPF Filter frequency down (lower).
After setting the input gain adjustment and crossover, you may choose to add a small amount of “Vega Bass Boost” 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, loudness 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 Boost.
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!
