Specifications

(2) Input and Output Connectors

The input and output connectors are wired as follows:

XLR Pin # Function

Pin 1 Earth & Chassis Ground

Pin 2 Signal + DIFFERENTIAL INPUT

Pin 3 Signal - DIFFERENTIAL INPUT

Connector Case Earth & Chassis Ground

A positive signal applied to pin 2 of the XLR will result in a positive acoustic

pressure wave (excursion) appearing at the front of the drivers in the speak-

er system. Conversely, a positive signal appearing at pin 3 of the XLR will

result in a negative acoustic pressure wave (recursion) appearing at the front

of the speaker system’s drivers.

Overview

The internal amplification package consists of dual, fully-independent power

supplies and dual, fully-independent 400-watt RMS, 1400-watt peak, digital

amplifiers. One channel is utilized for the low frequency driver and the other

channel is used for the high frequency driver, hence the term "bi-amped."

These amplifiers and power supplies use numerous, proprietary design fea-

tures that result in extremely low distortion, high reliability, and a very low

heat by-product. No fans are used or needed, eliminating the risk of a

mechanical device becoming noisy during a quiet performance due to bear-

ing wear or contamination.The absence of fans also greatly simplifies main-

tenance, by eliminating the need to regularly check and clean air intake filters.

Unlike some competing designs, the amplifiers used in Apogee powered loud-

speakers are designed to drive normal 4- and 8-ohm loads. Due to an excep-

tionally high voltage swing, the Apogee design does not require unusually low

impedance drivers in order to develop full power.Very low impedance driv-

ers (1- or 2-ohm) have a low BL-product and typically exhibit poor damp-

ening and transient response, resulting in a loss of clarity.

The amplifiers use a patented, almost instantaneous correction algorithm.

About 300,000 times per second, the amplifier control law compares input

and output signals ensuring nearly flawless signal reproduction.This radically

reduces distortion, improves linearity, and decouples the audio output from

power supply ripple.The result is a clean, clear sound quality that is normal-

ly associated with only large, esoteric hi-fi amps. However, the high-efficiency

design allows the amplifier to be of very small size and weight, ideally suited

for use in a powered loudspeaker system.

Amplifiers