speakers play the full range. Make sure that the preamplifier has been correctly set. If you are not using a subwoofer, set the speaker options to “Large” where possible.

•Check that the speaker wires have been connected correctly: Make sure that the positive of each speaker connects to a positive output of the amplifier, and the negative of each speaker connects to a nega- tive output. If one speaker is wired incorrectly, than it will be “out of phase” with the others, resulting in poor bass performance.

•If you have connected the amplifier using the XLR inputs, make sure that the XLR cables are wired cor- rectly. If one has the hot and cold reversed (pins #2 and #3), then this will also cause a speaker to be out of phase.

Turn-on and turn-off thumps

•Plug the amplifier into an un-switched AC outlet, and use the SIGNAL position of the turn on switch at the back of the amplifier. This will allow the amplifier to turn on and off silently.

“Hum” Noises in the Speakers

This problem is more than likely caused by a “ground loop” in your system, rather than a fault in the MPS-1. Follow these steps to isolate the main cause of the hum, there may even be more than one. Remember to turn off all components in your system, including the MPS-1, before disconnecting or connecting any cables.

•If your preamplifier has XLR balanced outputs, use them because they offer greater immunity to noise fields.

•Remember to turn off all components in your system, including the amplifier, before disconnecting or connecting any cables during troubleshooting.

•Try to have all of your equipment on the same electrical outlet or circuit. Group all the low power com- ponents (preamp, CD player, DVD etc.) on a single outlet or power strip. This is provided that the overall current draw from your equipment does not exceed the rating of the outlet or breaker.

•Disconnect all cables which come from outside the room, and check if the hum goes away. This includes such connections as cable TV, satellite TV, or roof top antennas. Make sure that they are disconnected where they first enter the room, so they are making no connection to the preamplifier or the TV, or any other component. If the hum is caused by the cable TV line, then you will need a “ground loop isolator.” This is an inexpensive device fitted in line with the coaxial cable feed. Contact your cable company or your Emotiva Dealer (unless purchased through AV123) for assistance.

•Disconnect all connections from the preamplifier to your TV, VCR or DVD.

•As a test, disconnect any other component which has a grounded power cord.

NOTE: Never remove the ground pin from any power cords (if present). This is very dangerous.

•If the hum persists, disconnect all the source components one at a time from the back of the preampli- fier, until you identify the problem.

•Try moving the speaker cables away from any power cords. Try just one speaker, connecting it to each amplifier channel and see if one channel is bad.

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Emotiva MPS-1 manual Turn-on and turn-off thumps
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MPS-1 specifications

The Emotiva MPS-1 is a powerful and versatile multi-channel amplifier designed to enhance audio performance in both home theaters and high-fidelity music systems. Known for its robust construction and high-quality sound output, the MPS-1 stands out as an ideal choice for audiophiles and home theater enthusiasts alike.

One of the defining features of the MPS-1 is its impressive power output. The amplifier delivers 200 watts per channel into 8 ohms and 300 watts into 4 ohms, providing ample headroom to drive even the most demanding speakers. This high power output ensures that users can enjoy dynamic sound without compromising on clarity or detail, making it suitable for both movies and music.

The MPS-1 utilizes advanced Class AB amplification technology, combining the efficiency of Class A with the thermal performance of Class B. This design minimizes distortion and maximizes linearity, ensuring that the sound remains clean and accurate across a wide frequency range. The amplifier also features a high-current output stage, allowing it to handle sudden peaks in audio without clipping, an essential quality for impactful sound reproduction.

Another significant aspect of the MPS-1 is its comprehensive connectivity options. It is equipped with both balanced XLR and unbalanced RCA inputs, providing flexibility for integration into various audio setups. The amplifier can also be configured to operate in a bridged mode, effectively doubling the output power to drive larger speaker setups or subwoofers, which enhances its versatility in custom installations.

In terms of build quality, the MPS-1 showcases Emotiva's commitment to durability. The amplifier features a heavy-duty steel chassis designed to minimize interference from external sources, while the high-quality components used in its construction—such as powerful power supplies and premium capacitors—ensure longevity and reliability.

The MPS-1 also incorporates intelligent thermal management features, including heat sinks and a built-in fan that operates only when necessary, keeping the unit cool during extended use without introducing unwanted noise.

Overall, the Emotiva MPS-1 represents a compelling choice for those seeking a high-performance multi-channel amplifier that combines power, flexibility, and exceptional audio fidelity, making it a worthy addition to any serious sound system.
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