Turn-on and turn-off thumps

•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 negative output. If one speaker is wired incorrectly, than it will be “out of phase” with the others, resulting in poor bass performance. DOUBLE CHECK ALL THE SPEAKER CONNECTIONS!!

•Plug the ampliﬁer into an un-switched AC outlet, and use the 3.5mm Trigger Input connection with a trigger between 5-12VDC from the source unit or preampliﬁer (such as the Emotiva LMC-1 Preampliﬁer/Processor). This should allow the ampliﬁer to turn on and off silently.

•If your powered subwoofer is the cause of the “thump” sound (not the other speakers connected to XPA-1), plug it into a different 115VAC outlet than the XPA-1 ampliﬁer so there is no power surge conﬂict.

•Install a line conditioning device.

“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 XPA-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 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 components (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 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 preampliﬁer, 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.

•Check that the interconnect cables to the ampliﬁer do not have any broken connections. The best way to do this is to substitute a known good connection for the suspect connection. If you reverse the cables and the problem goes away, the cable may be damaged or broken. This is possible even if you can’t physically see the break as the strain for pulling on audio cables can sometimes break the wire internally.

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XPA-1 specifications

The Emotiva XPA-1 is a powerful and sophisticated monoblock amplifier designed for audiophiles who demand high performance and exceptional sound quality. With a power output of 1000 watts per channel into 8 ohms, and doubling the power to 2000 watts into 4 ohms, the XPA-1 is engineered to drive even the most demanding speakers with ease.

One of the key features of the XPA-1 is its fully balanced design. This configuration minimizes distortion and improves dynamic range by reducing the noise floor, allowing for a cleaner and more detailed sound. The amplifier employs a Class A/B topology, ensuring that sound quality remains pristine while delivering the high power needed for demanding audio applications. This hybrid design combines the efficiency of Class B operation with the low distortion characteristics of Class A amplification.

Thermal management is another critical aspect of the XPA-1. The amplifier is equipped with a robust heat sink and thermal protection circuitry, ensuring that it operates safely and efficiently even during extended listening sessions. The design allows for quiet operation, minimizing the impact of fan noise, a common concern with high-power amplifiers.

The XPA-1 features high-quality components, including custom-wound toroidal transformers, which provide a stable power supply. This contributes to the amplifier's impressive transient response and dynamic capability, allowing it to handle complex musical passages and peak demands effortlessly. Additionally, the use of high-grade capacitors further enhances performance, ensuring that audio playback is not only powerful but also accurate and lifelike.

Another notable feature is the XPA-1's RCA and XLR inputs, providing versatile connectivity options for various audio sources. This enhanced flexibility allows users to integrate the amplifier seamlessly into their existing audio systems, whether for home theater setups or high-end stereo configurations.

Emotiva's attention to detail extends to the build quality of the XPA-1. With a sleek and sturdy chassis, the amplifier is designed to endure the rigors of everyday use while complementing any high-end audio environment. The front panel features a unified design with neatly arranged controls, making it user-friendly and aesthetically appealing.

In summary, the Emotiva XPA-1 is a high-performance monoblock amplifier that combines advanced technology, exceptional power output, and robust build quality. Its fully balanced design, powerful Class A/B amplification, and high-quality components make it an attractive option for audiophiles looking to elevate their sound systems to new heights. Whether for music or home theater applications, the XPA-1 delivers an uncompromising listening experience that truly captivates.