Klipsch C-308ASWI Powered Subwoofer

Klipsch C-308ASWI is a powered subwoofer designed to extend the bass response of stereo and home cinema systems. Its forward-firing 8-inch Cerametallic driver is supported by side-firing passive radiators, helping the subwoofer retain a compact cabinet. The integrated BASH digital hybrid amplifier delivers 300 W of continuous power and 600 W of peak power.

Cabinet Design and Finish

The active driver and passive radiators work together to extend low-frequency reproduction while keeping the cabinet compact. This arrangement is useful when a system needs additional bass but there is not enough room for a larger enclosure.

The side-firing radiators must remain unobstructed, so the subwoofer should not be squeezed tightly between pieces of furniture. A hand-polished high-gloss piano finish gives the cabinet a seamless, mirror-like surface.

Connection Options

Two RCA line-level connections are provided for a source or amplifier with a suitable line output. This is usually the simplest wired connection method. Choose one signal path before connecting the subwoofer, and do not use multiple inputs for the same source.

The balanced XLR connection is suitable for equipment with a compatible balanced output. This connection can be useful with a longer cable or in an environment where electrical interference may occur.

A high-level speaker connection allows the subwoofer to receive a signal from an amplifier’s speaker output. This method can be selected when the amplifier does not have a suitable line-level output.

The subwoofer also supports 2.4 GHz wireless connectivity and is compatible with the Klipsch WA-3 transmitter. Check whether the transmitter is included or must be purchased separately before buying; the available information confirms compatibility only with the WA-3.

Controls and Initial Setup

This model was designed to be controlled and configured through the Klipsch LowControl app, which was offered for iOS and Android devices. Current app availability and support for newer operating systems are not guaranteed.

Automatic room correction is intended to adjust the bass response for the listening environment. Run the correction process only after choosing the subwoofer’s final position. Moving the cabinet changes how the room affects its bass output.

If an AV receiver manages the crossover, set the initial crossover point according to the capabilities of the main speakers. A setting that is too high may reveal the subwoofer’s location, while one that is too low may leave an audible gap between the frequency ranges reproduced by the speakers and subwoofer.

Placement

Begin with a position near the front speakers, while keeping both sides of the cabinet unobstructed. A corner often increases bass output, but it can also make the response less even. If the bass becomes overly pronounced, move the cabinet farther away from the wall or corner.

Judge the final result from the main listening position. Even small placement changes can significantly alter the bass balance. Once you have found a suitable position, perform the automatic room-correction procedure.

Technical Specifications

FAQ

What type of audio system is this subwoofer designed for?

It is intended for a stereo or home cinema system that needs a separate powered bass channel. Its integrated amplifier drives the active driver, so the subwoofer does not require a separate power amplifier.

Which connection should I use with an amplifier or AV receiver?

Use the output provided by your equipment. Choose RCA for a line-level RCA signal and XLR for a balanced signal. The high-level connection is intended for an amplifier without a suitable line-level output.

Does the wireless connection work without an additional transmitter?

Wireless operation requires a Klipsch WA-3 transmitter compatible with this model. Check whether the transmitter is supplied or must be purchased separately before buying; the available information confirms compatibility only with the WA-3.

What is the difference between continuous and peak power?

Continuous power describes the amplifier’s ability to sustain output over a longer period. The peak rating describes short-term power capacity, so the two figures should not be treated as equivalent measurements.

When should I run automatic room correction?

Run the correction process again whenever the subwoofer is moved, because changing its position also changes the room’s effect on bass reproduction.

Can the subwoofer be placed on a tight shelf?

A confined shelf may obstruct the side-firing passive radiators. Leave free space around both sides of the cabinet and assess the result from the listening position.