Owner`s manual

Conversely, constant sensitivity demands that as
the power increases, so must the gain. Yes, the output
noise of the amplifier will increase, but you maintain in
the critical headroom available from your mixer. The
additional noise is generally not a problem in live
sound reinforcement situations. If it is, you can turn
down the GAIN control a few clicks to find a happy
compromise between noise floor and headroom
available. As an added benefit, you can drive multiple
amplifiers with the same signal and get the maximum
power available from all of them.
The gain structure of the BMB DX-333 Stereo
Mixing and Digital Key Control Amplifier is designed
so that a 4 dBu (1.23V rms) input signal drives the
amplifier to 425 watts into 4 ohms. This is how the
sensitivity of an amplifier is defined. In this case, it
equates to a voltage gain of about 20 dB.
You can set the GAIN controls as low as you like.
However, reducing GAIN controls requires an
increased input level to reach full power at the
amplifier's output. Like all amplifier controls, you'll
typically determine the optimal settings during
installation or sound check, then leave them alone,
using your signal source to control listening level as
you work.
Automatic Zero Volume Adjustment
The special function of the automatic volume
adjustment automatically sets both of the MIC MASTER
VOL and MUSIC MASTER VOL to zero volume level
when the power is turned on. This would avoid sudden
painfully loud sound to damage hearing power for
ear. You can switch it to for manual operation.
However, we recommend you to use this function to
protect your hearing power.
Adjustable Built- In Equalizer
The BMB DX-333 Stereo Mixing and Digital Key
Control Amplifier has low, mid peaking, and high
built-in equalizer.
HI-EQ
This control provides from -15 dB to + 15 dB of
boost of cut, and it is also flat at the detent. Use it to
add sizzle to cymbals or an overall sense of
transparency or edge to keyboards, vocals, guitar,
and bacon frying.
MID-EQ
Short for "midrang," it provides from -12 dB to +12
dB of boost or cut, also flat at the center detent.
Midrange EQ is often considered the most dynamic
because the frequencies that define any particular
sound are almost always found in this range.
LOW-EQ
This control provides from -15 dB to + 15 dB of
boost. The circuit is flat (no boost or cut) at the center
detent position. This frequency represents the punch in
bass drums, bass guitar, fat synth patches, and
high-testosterone male singers.
Smart Fan
The fan at the back of the BMB DX-333 Stereo
Mixing and Digital Key Control Amplifier automatically
turns on to cool down the heat when the temperature
reaches 60 degree Fahrenheit.
Music Key Control
You can adjust the music key for Karaoke singing.
Increase the music keys from #1 to #4 and decrease
the music keys from b1 to b4.
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