Atlantic Technology 642e SB instruction manual Features,  a high-efficiency 300 watt amplifier

Features

Instruction Manual

Features

Your Atlantic Technology powered subwoofer has been engineered using the latest technology and finest components available. It features:

A long-throw 12” composite cone driver with a vented 9-pound motor structure and 2” high temperature, 4-layer voice coil.

This powerful driver has a very stiff cone that acts like a piston throughout its operating range. Its massive magnetic motor assem- bly and high temperature component parts deliver exceptional per- formance and reliability.

Sealed enclosure design for low distortion and deep bass output

Sealed enclosure woofer designs are inherently low in distortion,and deliver deep smooth bass response with a gradual and predictable roll-off below resonance.As with all Atlantic Technology subwoofers, we have paid close attention to providing accurate musical bass repro- duction along with terrific special effects.

A high-efficiency 300 watt amplifier

This 642e SB utilizes the latest in amplifier technology . The output stage is capable of very high current delivery with maximum effi- ciency for exceptional driver control and cool operation. As a custom designed amplifier it has been precision matched and equalized to our 12” driver. Together they deliver powerful, controlled bass with great articulation and authority.

A useful in room working frequency range of 20Hz to 150Hz

Many subwoofers offer specifications that look great on paper, but in real world use deliver less than promised. Atlantic Technology sub- woofers are over-designed to ensure that they will deliver their rated performance in your room, when properly placed and adjusted.

An adjustable (40Hz to 140Hz) @ 18dB per octave LowPass crossover

The steep upper end roll-off slope of 18dB per octave allows for much better bass integration with the satellite speakers while making the woofer less localizable.

Note: If you are using a surround Processor/Receiver that includes its own filtered subwoofer output (or a THX Certified Processor/ Receiver), we strongly recommend that you set the 642e SB cross- over control to the Bypass position.

Two low level inputs, two low level outputs

The outputs allow daisy chaining of multiple subwoofers, or as a return path back to the processor.

A Phase Invert switch (Normal/Invert)

This switch allows precise acoustic matching with satellite speaker systems whose output may be phase reversed.This switch also allows you to compensate for unusual room acoustics that occur when the woofer is physically separated from the main speakers.Be sure to try the Phase switch in both positions when you set up the 642e SB.Even if you’ve simply changed the built-in crossover settings it’s a good idea to try the Phase switch in both positions, since the crossover control and the Phase switch acoustically interact with each other.Pay partic- ular attention to the transition of bass from the woofer to the satellites, listening for smooth and well defined bass throughout the range.

A convenient front panel mounted Level Control

Automatic standby operation, LED indicator

Automatic standby features signal sensing turn-on with 7-10 minute turn-off delay. There’s a front panel multi-color LED status indica- tor that lets you know when the unit is on or in standby. Automatic Standby can be defeated by placing the rear mounted switch in the ON position.

An AC cord power input socket.

Your subwoofer comes supplied with a heavy-duty detachable power cord.

Designed and built to meet all current UL/CSA and European safety requirements