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For this reason, we strongly recommend using the balanced analog interconnections between your Classé components wherever possible.

The pin assignments of these XLR input connectors are:

Pin 1: Signal ground

Pin 2: Signal + (non-inverting)

Pin 3: Signal – (inverting)

Connector ground lug: chassis ground

These pin assignments are consistent with the standard adopted by the Audio Engineering Society (AES14-1992).

If you are using your Classé power amplifier with a Classé preamplifier, you’re all set – just take standard balanced interconnect cables and plug them in.Then engage that input on the power amplifier by configuring it as described in Initial Setup.

If you are using another brand of preamplifier, please refer to the operating manual of your balanced-output preamplifier to verify that the pin assignments of its output connectors correspond to those of your amplifier. If not, have your dealer wire the cables so that the appropriate output pin connects to the equivalent input pin.

2Single-Ended (RCA) Input

Single-ended cables using RCA connectors are the most common form of analog connection used in consumer electronics. When implemented carefully and with use of high quality interconnecting cables, this standard can provide excellent performance. Classé has gone to extraordinary effort to ensure that the single-ended (RCA) input of your power amplifier is as good as possible. However, this connection standard cannot offer the immunity from interference that balanced interconnection does—hence our recommendation to use the balanced inputs when possible.

If you elect to use the single-ended input of your Classé power amplifier, you need to engage it by configuring the amplifier as described in the section Initial Setup.

3Speaker Outputs

Two pairs of high quality five-way binding posts are provided on the amplifier, in order to facilitate bi-wiring.

In practice, bi-wiring involves connecting two (preferably identical) sets of speaker cables between each amplifier channel and its corresponding loudspeaker. In many cases, the benefit is a subjectively improved level of clarity and detail from the speaker, as a result of being able to feed the two separate sections of its crossover and driver complement with identical, yet separate signals.

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Classe Audio CA-M400 owner manual Single-Ended RCA Input, Speaker Outputs
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CA-M400 specifications

The Classe Audio CA-M400 is a high-performance power amplifier that encapsulates the essence of quality sound engineering and sophisticated design. Hailing from the renowned Canadian audio manufacturer Classe Audio, this amplifier is designed for audiophiles who demand both power and precision in their audio playback.

One of the standout features of the CA-M400 is its impressive power output. Delivering 400 watts per channel into 8 ohms and 800 watts per channel into 4 ohms, this amplifier is capable of driving a wide range of speakers with ease, ensuring that even the most demanding systems receive ample power. This power is supplemented by Classe's proprietary Current Feedback topology, which allows for high-speed response and minimal distortion, resulting in clear and dynamic sound reproduction.

The CA-M400 employs a dual-mono design, ensuring that each channel operates independently for enhanced imaging and soundstage depth. This configuration not only contributes to the clarity of audio reproduction but also minimizes crosstalk between channels, delivering a more immersive listening experience. The use of high-quality components and a robust power supply further enhances performance, providing exceptional stability and reliability even during peak demands.

Another defining characteristic of the Classe Audio CA-M400 is its system control capabilities. It features a comprehensive range of input options, including balanced XLR and single-ended RCA connections, allowing for flexible integration into various audio setups. Additionally, the amplifier supports remote power control, making it user-friendly and easy to manage within a home theater or stereo system.

Furthermore, the design of the CA-M400 exudes elegance and sophistication. Its sleek chassis is crafted with meticulous attention to detail, featuring a brushed aluminum finish and an intuitive front panel. The amplifier also features a highly efficient thermal management system, ensuring it remains cool during extended listening sessions without compromising performance.

In summary, the Classe Audio CA-M400 is a power amplifier that combines raw power with cutting-edge technology to deliver an unparalleled audio experience. With its formidable power output, innovative design, and exceptional build quality, it stands as a remarkable choice for anyone looking to elevate their audio setup to new heights. Whether it be for critical listening or high-octane movie nights, the CA-M400 promises to deliver an impressive sonic performance that will satisfy even the most discerning audiophiles.
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