O Audio BASH - Introduction

O Audio 300W BASH
®
Subwoofer Amplifier User’s Manual V1.2 page 3 of 12
Copyright © 2008
INTRODUCTION:
Thanks for purchasing the O Audio 300W 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 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 300W BASH
®
Subwoofer Amplifier will
produce up to 300W RMS into a 4Ù load at a Total Harmonic Distortion (THD) of less
than 0.09% and less then 0.04% between 0W – 275W. With an 8Ù load, the
amplifier will produce up to 150W RMS at a THD less than 0.05%. Soft limiting
circuitry is active above 150W (into an 8Ù load).
In addition to BASH
®
amplifier technology, the O Audio 300W BASH
®
Subwoofer
Amplifier includes the essential continuously variable controls (output level, phase,
and crossover frequency) necessary to integrate a subwoofer into your listening
environment.