Emotiva UPA-2 manual Turn-on and turn-off thumps, Hum Noises in the Speakers

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•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!!

Turn-on and turn-off thumps

•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 UPA-2), plug it into a different 115VAC outlet than the UPA-2 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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Contents UPA-2 Table of Contents UPA-2 Technical Specifications Limited Warranty Safety Precautions Toll Free 877 EMO-TECH Antenna Grounding Outside the House NEC National Electrical Code StandardsThank You for your UPA-2 Purchase Inventory Unpacking the UPA-2Recording the Serial Number Front Panel Layout Emotiva UPA-2 Stereo Power AmplifierRCA Audio Inputs/Outputs Rear Panel LayoutAC Power Considerations Installation and ConnectionsPhysical Placement Output Connection Considerations Input Connection ConsiderationsConnection Tips for Superior Sound Connecting a 7.1 Preamp/Processor Connection DiagramsConnection using a 7.1channel preout to UPA-2 Connection using a 7.1 channel preout to UPA-2 12V Trigger Connections Series Series and Parallel Speaker ConnectionsParallel Technical Note about Multiple Speaker Connections No Sound from one or more speakers connected to the UPA-2 Troubleshooting GuideHum Noises in the Speakers Turn-on and turn-off thumpsOther Probable Causes of Noise Problems with the whole A/V SystemOne or more RED lights on the Front Panel are Blinking UPA-2 Technical Specifications Emotiva Audio Corp Emotiva Disclosure Limited WarrantyEmotiva Audio Corp

UPA-2 specifications

The Emotiva UPA-2 is a versatile and powerful two-channel power amplifier designed to elevate your audio experience. Offering a combination of high-performance specifications and exceptional build quality, it is an ideal choice for both music enthusiasts and home theater aficionados looking to enhance their sound systems.

One of the standout features of the UPA-2 is its robust power output. It delivers a continuous power of 125 watts per channel into 8 ohms, and an impressive 200 watts per channel into 4 ohms. This high power output ensures that even the most demanding speakers can be driven with ease, providing clarity and detail across the audio spectrum. Whether you are listening to intricate orchestral compositions or thumping bass-heavy tracks, the UPA-2 is designed to reproduce audio accurately and without distortion.

The UPA-2 employs a high-quality Class A/B amplifier design, which combines the best characteristics of both Class A and Class B technologies. This results in efficient operation without compromising sound quality. The amplifier features an advanced Thermal Management System, ensuring it remains cool and reliable even during extended listening sessions. Additionally, its dual mono construction minimizes crosstalk between channels, leading to a clearer stereo image.

Another noteworthy characteristic of the UPA-2 is its solid build quality. Encased in a sturdy chassis, it is designed to withstand the rigors of daily use while providing a sleek and modern aesthetic. The amplifier features gold-plated RCA inputs and a detachable power cord for added convenience and connectivity. Furthermore, the UPA-2 is equipped with a comprehensive protection circuitry system, safeguarding against potential overcurrents, overheating, and short circuits.

In terms of compatibility, the Emotiva UPA-2 can seamlessly integrate into a variety of audio setups. It pairs well with both high-efficiency speakers and demanding high-fidelity systems, making it a versatile choice for various listening environments. The amplifier's balanced XLR inputs also support professional-grade equipment, further enhancing its utility.

Ultimately, the Emotiva UPA-2 stands out for its combination of power, efficiency, and sound quality. Its thoughtful engineering and feature set make it an exceptional choice for anyone looking to enhance their audio experience, proving that it truly deserves a place in any serious music lover's setup.
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