Emotiva RPA-1 manual Technical Note about Multiple Speaker Connections

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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 RPA-1! Running the RPA-1 below recommended impedance level can cause excessive heat and will eventually drive the amplifier into protection (blinking red LED 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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Contents USER’S Guide Table of Contents RPA-1 Technical Specifications Trademark Disclosure Safety Precautions Page NEC National Electrical Code Standards Antenna Grounding Outside the HouseThank You for your RPA-1 Purchase Unpacking the RPA-1 InventoryRecording the Serial Number Emotiva RPA-1 Reference Power Amplifier RPA-1 Front Panel LayoutRPA-1 Rear Panel Layout RCA Audio InputsInstallation and Connections AC Power ConsiderationsPhysical Placement Input Connection Considerations Output Connection ConsiderationsConnection Tips for Superior Sound Connection of a Preamp Level Device using XLR Inputs Connection DiagramsConnecting a Preamp Connection of a Preamp Level Device using RCA InputsConnecting Speakers Connection of a Stereo SpeakersBiamped Connections Low Pass and High Pass 12V Trigger Connections Series and Parallel Speaker Connections SeriesParallel Technical Note about Multiple Speaker Connections Speaker Placement Tips Tips Before BeginningFront Speakers Subwoofer Location for 2.1 SystemsBass music Troubleshooting Guide No Sound from one or more speakers connected to the RPA-1Turn-on and turn-off thumps Hum Noises in the SpeakersRED light on the front panel blinks from blue to red Problems with the whole Audio SystemOther Probable Causes of Noise RED light on the front panel is illuminated solid redRPA-1 Technical Specifications Raw Weight Shipping Weight DimensionsTrademark Disclosure Emotiva DisclosureLimited Warranty Service Assistance for the RPA-1Emotiva Franklin, TN

RPA-1 specifications

The Emotiva RPA-1 is a high-performance power amplifier designed for audio enthusiasts who demand exceptional sound quality and reliability. This amplifier is a part of Emotiva’s RPA series, known for their outstanding engineering and sonic performance. The RPA-1 delivers impressive power output, with the ability to drive demanding speakers effortlessly, making it ideal for both music and home theater applications.

One of the main features of the RPA-1 is its robust power output. It provides 200 watts per channel into 8 ohms and an even more powerful 400 watts per channel into 4 ohms, ensuring that it can handle dynamic music passages and movie soundtracks with ease. This amplifier employs Class AB amplification technology, which combines the benefits of both Class A and Class B amplifiers, resulting in low distortion, high efficiency, and a very clean sound.

The RPA-1 is equipped with a high-quality, custom-designed power supply, which features a large toroidal transformer and multiple large filter capacitors. This design ensures that there is ample power for transient peaks in the audio signal, leading to improved dynamics and headroom. The amplifier also includes a sophisticated protection circuit to prevent damage from short circuits or overheating, ensuring longevity and reliability.

Another characteristic of the Emotiva RPA-1 is its exceptional build quality. The chassis is constructed from heavy-duty steel, providing a solid and stable foundation that minimizes resonances. The sleek, modern design features a brushed aluminum front panel with easy-to-read indicators, creating an aesthetically pleasing addition to any audio setup.

In terms of connectivity, the RPA-1 features multiple RCA inputs for connecting to various audio sources, as well as binding post outputs for speaker connections. This versatility allows users to integrate the amplifier into a wide range of systems, from stereo setups to multi-channel home theaters.

Overall, the Emotiva RPA-1 is a powerful, reliable, and versatile amplifier that delivers exceptional audio performance. Its combination of high power output, robust build quality, and advanced technologies makes it an excellent choice for audiophiles and home theater enthusiasts alike. Whether you are listening to music or watching movies, the RPA-1 is sure to provide an immersive and satisfying audio experience.
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