How to set the Speaker Load switch when the Model 275 v.2 is configured for Bridged Mono operation:

Single 8 Ohm Speaker

In this case the Speaker Load switch should be set to 4-8Ω.

Single 4 or 6 Ohm Speaker

In this case the Speaker Load switch must be set to 2-3Ω.

Two 8 Ohm Speakers

In this case the Speaker Load switch must be set to 2-3Ω. Connect the + wire of the first speaker to the Speaker Output A red R channel positive terminal and connect the speaker’s – wire to the red L channel positive terminal. Connect the second speaker similarly to the Speaker Output B red R and L positive terminals.

Note: Never connect two 4 ohm speakers for bridged mono operation. This results in a 1 ohm load on each channel which could cause the amp to overheat and shut down.

Bi-Amping Using Two Model 275 v.2 Amplifiers

If your speakers have separate input terminals for their Low and High frequencies there is usually a greater sonic advantage using two Model 275 v.2 amplifiers to ‖bi-amp‖ your speakers rather than bridge them as monoblocks. When bi-amping the Bridged Mono switch must be set to its Normal (Stereo) position.

When set up for bi-amping you will use one channel of one 275 v.2 to power the high frequency drivers and the second channel of the same amp to power the low frequency drivers. Since both channels of the amp need the same audio signal you will need to connect the Loop Out jack of one channel to the input of the second. If you connected your preamp to the 275 v.2’s L channel Input jack to then you’ll need a short RCA cable to connect the 275 v.2’s L channel Loop Out jack to its R channel Input jack.

A + B Speaker Load Switch

The Speaker Load switch gives the Model 275 the flexibility to drive very low impedance loads. Such situations can occur when the Model 275 is asked to drive multiple pairs of speakers.

For a single pair of 4 ohm or 8 ohm speakers the Speaker Load switch may be set to its 4-8Ω position. The Speaker Load switch must be set to 2-3Ω whenever the load will be lower than 4 ohms. Speaker loads below a 4 ohm impedance can cause the Model 275 v.2 to rapidly overheat and cause audible distortion.

These are examples that require the 2-3 Ω setting:

1.Driving two pairs of speakers whose impedances are unknown.

2.Driving two pairs of speakers whose impedances are each lower than 8 ohms. For example, two pairs of 4 ohm speakers driven simultaneously = 2 ohm load.

3.Driving three pairs of 8 ohms speakers simultaneously = 2 .66 ohm load.

4.Driving a single 4 ohm speaker in Bridged Mono operation = 2 ohm load

5.Driving two 8 ohm speakers in Bridged Mono operation = 2 ohm load

Note: For the coolest possible operating temperature we recommend setting the Speaker Load switch to 2-3 ohms even if you are using a single pair of 8 ohm speakers.

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Parasound 275 V.2 manual Single 8 Ohm Speaker, Single 4 or 6 Ohm Speaker, Two 8 Ohm Speakers
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275 V.2 specifications

The Parasound 275 V.2 is a powerful and versatile amplifier that stands out in the crowded landscape of audio equipment. Known for its robust construction and high-quality performance, it has become a favorite among audiophiles and home theater enthusiasts alike.

At the heart of the 275 V.2 is its impressive power output. Delivering 2 x 60 watts into 8 ohms and 2 x 90 watts into 4 ohms, this amplifier can easily drive a variety of speakers efficiently. This output is achieved with a toroidal transformer and high-capacity filter capacitance, ensuring a clean and dynamic sound. The amplifier's ability to provide high current allows it to maintain performance under demanding conditions, making it a reliable choice for both music and movie playback.

One of the standout features of the Parasound 275 V.2 is its use of high-quality components. The amplifier employs discrete, low-noise, high-speed transistors for an ultra-linear frequency response, resulting in low distortion across all frequencies. Additionally, it features a full complement of protection circuitry that shields the amplifier and connected speakers from potential damage, which is a crucial aspect of long-term reliability.

The design of the 275 V.2 also places a strong emphasis on versatility. It includes both unbalanced RCA inputs and balanced XLR inputs, allowing it to seamlessly integrate into a variety of audio systems. This flexibility is particularly beneficial for users with high-end source components that utilize balanced outputs.

User-friendly features like a 12V trigger input and output enable easy integration into automated systems, while the inclusion of a remote trigger output means the amplifier can work in conjunction with other powered devices. Furthermore, the amplifier has a front-panel power switch, which can be beneficial for quick access.

Aesthetically, the Parasound 275 V.2 is designed with a modern look, featuring a sleek chassis that is both durable and stylish. It also sports an elegant, minimalist front panel, which reflects the brand's commitment to quality.

In summary, the Parasound 275 V.2 is a high-performance amplifier that combines impressive power, superior build quality, and versatile connectivity options. Its innovative technologies and thoughtful engineering make it a top contender for anyone looking to elevate their audio experience, whether in a home theater or a dedicated listening room. With its balance of reliability and performance, the 275 V.2 is a commendable choice for discerning audio enthusiasts.
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