O Audio 500W BASH
®
Subwoofer Amplifier User
’
s Manual page 3 of 13
Copyright © 2005
INTRODUCTION:
Thanks for purchasing the O Audio 500W BASH
®
Subwoofer Amplifier. This amplifier
features BASH
®
technology which enables a high output power amplifier in a small
package.
Traditional Class AB amplifiers use a fixed voltage power supply. This approach is
wasteful and necessitates extensive heatsinking, particularly for very high power
amplifiers such as this one. Additionally, primitive unregulated power supplies are
typically used that require a substantial, and expensive, transformer to assure
stable supply voltages over a range of load conditions. Inexpensive subwoofer plate
amplifiers typically skimp on the transformer size in the interest of low cost.
BASH
®
amplifier technology marries a robust Class AB amplifier with a smart power
supply that adaptively provides the necessary output voltage required to produce
low-distortion output power. The O Audio 500W BASH
®
Subwoofer Amplifier will
produce up to 500W RMS into a 4
Ù
load at a Total Harmonic Distortion (THD) of less
than 0.3% and less then 0.05% between 5W
–
420W. With an 8
Ù
load, the amplifier
will produce up to 325W RMS at a THD less than 0.01%. Soft limiting circuitry is
active above 325W (into
an 8
Ù
load).
In addition to BASH
®
amplifier technology, the O Audio 500W BASH
®
Subwoofer
Amplifier includes all of the continuously variable controls (output level, phase,
crossover frequency, and parametric equalization) required to properly integrate a
subwoofer into your listening environment. Also, a subsonic filter/low end EQ
control is provided. The 14AWG, 8
’
long AC cable is long enough to facilitate
plugging the amplifier into a nearby AC outlet. The wire gauge of the provided AC
cable is the same as your house wiring, thus ensuring optimal performance.
