Emotiva RPA-1 manual Series and Parallel Speaker Connections

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Series and Parallel Speaker Connections

Whenever connecting more than one speaker per channel to an amplifier (regardless of the brand), you must consider the way in which the amplifier will be impacted by adding the additional speaker(s). Additionally, speakers with dual voice coils also apply to this consideration. Two voice coils in a single speaker also cause different reactions from an amplifier depending on the way in which they connect to the amplifier.

The connection of more than one speaker per channel will tend to degrade the speaker’s frequency response and may make the amplifier run hot. For the best sonic results, use one speaker per amplifier channel. If you must connect more than one speaker per channel, there are two methods in which to do so: Series or Parallel.

Series

A series connection is established when voice coils are connected in a string – end to end – so there’s only one way for audio signals to flow “in” and only one way for audio signals to flow “out”. For example, if you were to series-connect two speakers to the front right channel of the amplifier:

•The positive output terminal of the right channel connects to the positive input post of the first speaker.

•The negative input post of the first speaker connects to the positive input post of the second speaker.

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

An example of a SERIES connection between two speakers

The total impedance of speakers in series is found by adding their impedances together. For example, two four ohm speakers in series is an eight ohm load. Series connections are easier on the amplifier than parallel connections as the total impedance is higher than driving a single speaker.

Parallel

A parallel circuit is established when voice coils are connected in a way that there are multiple paths for audio signals to flow “in” and multiple paths for audio signals to flow “out”. When speakers are connected in parallel, the total resistance at the amplifier is proportionally divided based on the value of each individual voice coil resistance. The term “divided” simply means all of the values together in parallel are a SMALLER value than each all by itself. For example, if you were to parallel connect two speakers to the front right channel of the amplifier:

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

•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.

An example of a PARALLEL

connection between two

speakers

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Contents USER’S Guide Table of Contents RPA-1 Technical Specifications Trademark Disclosure Safety Precautions Page Antenna Grounding Outside the House NEC National Electrical Code StandardsThank You for your RPA-1 Purchase Recording the Serial Number Unpacking the RPA-1Inventory RPA-1 Front Panel Layout Emotiva RPA-1 Reference Power AmplifierRCA Audio Inputs RPA-1 Rear Panel LayoutPhysical Placement Installation and ConnectionsAC Power Considerations Connection Tips for Superior Sound Input Connection ConsiderationsOutput Connection Considerations Connecting a Preamp Connection DiagramsConnection of a Preamp Level Device using XLR Inputs Connection of a Preamp Level Device using RCA InputsConnection of a Stereo Speakers Connecting SpeakersBiamped Connections Low Pass and High Pass 12V Trigger Connections Parallel Series and Parallel Speaker ConnectionsSeries Technical Note about Multiple Speaker Connections Tips Before Beginning Speaker Placement TipsSubwoofer Location for 2.1 Systems Front SpeakersBass music No Sound from one or more speakers connected to the RPA-1 Troubleshooting GuideHum Noises in the Speakers Turn-on and turn-off thumpsOther Probable Causes of Noise Problems with the whole Audio SystemRED light on the front panel blinks from blue to red RED light on the front panel is illuminated solid redRaw Weight Shipping Weight Dimensions RPA-1 Technical SpecificationsEmotiva Disclosure Trademark DisclosureEmotiva Limited WarrantyService Assistance for the RPA-1 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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