•The negative output terminal of the right channel connects to the negative input post of the first speaker and to the negative post of the second speaker.

The total impedance of equal speakers in parallel is found by dividing the impedance of one speaker by the number of speakers. For example, two eight ohm speakers in parallel is a four ohm load (eight ohms divided by two), four eight ohm speakers in parallel is a two ohm load (eight ohms divided by four). Two ohm single channel loads are NOT RECOMMENDED for the UPA-2!

Running the UPA-2 below recommended impedance level can cause excessive heat and will eventually drive the amplifier into protection(blinking red LED’s on the front of the unit).

Parallel connections are harder on the amplifier than series connections, as the total impedance is lower compared to driving a single speaker, and the amplifier must produce more current to drive them.

Ideally, the total average impedance should be no less than 4 ohms per channel. You must make sure that the lower impedance does not cause the amplifier to overheat, shut down, blow the line fuse, or trip your circuit breaker. If this happens, you should reduce the number of speakers wired in parallel, rewire them in series, or use more than one power amplifier.

Technical Note about Multiple Speaker Connections

Although there are two possible connection types discussed in this manual, it is imperative that with either connection type that you use loudspeakers of the same type and nominal impedance for these connections. In doing so, you have the most predictable outcome for your installation. When speakers of different nominal impedances and/or different bandwidths are used, there are many other acoustic problems that come into play in addition to complex impedance at the amplifier’s speaker output terminals. If you must use multiple speakers on any individual amplifier channel, please use speakers as close to identical as possible.

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Emotiva UPA-2 manual Technical Note about Multiple Speaker Connections
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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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