Mirage Loudspeakers BPS-400 - Manual (Page 6)

Pulse Width Modulation
Your new BPS-400 incorporates a revolutionary new power amplifier technology called
Pulse Width Modulation (PWM).
The 400 watt PWM amplifier used in the BPS-400 has much higher efficiency (90%) than
typical analog amplifiers (20%) and thus generates much less heat (typically 1/5).
The PWM amplifier can generate much higher power output than comparable analog
amplifiers (400W vs 100-200W).
The 400 watt PWM amplifier is capable of generating very high sound pressure levels
125dB @ 18Hz.
Low-Level RCA Input Jacks
The RCA input jacks allow you to connect your subwoofer to any of the following:
(a) Pre-amplifier outputs
(b) Audio/Video processor outputs
(c) The "subwoofer output" from an Audio/Video receiver
(d) Any integrated receiver with pre-out facilities
(e) The audio output from your stereo television or computer sound cards
(f) An External Active Crossover.
See "Subwoofer Connection to your Audio/Video System".
OPERATING CONTROLS
Subwoofer Level Control
This rotary control adjusts the output level of your Mirage subwoofer and should be
used to balance the level of the subwoofer with that on your main/satellite speakers.
See “Set-up Calibration”.
LP Filter (Low-pass) Control
This rotary control adjusts the high frequency roll-off of the subwoofer. Continuously
variable from 50Hz to 100Hz, it is used to precisely match the subwoofer bass
reproduction with that of your main/satellite speakers. See “Set-up Calibration”.
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