Bridged Mono Operation, Speaker Terminals

Speaker Connections

Speaker Terminals

There are separate speaker terminals for two pairs of speakers, labeled Speaker Pair A and Speaker Pair B. The speaker terminals accept speaker wires with banana plugs, spade connectors or bare wire.

Correct Speaker Polarity is Important

Polarity refers to + and – connections. Speaker wires are coded with color, printing or a ridge on the insulation on one of the leads so you know which lead was connected to the + and – terminals at the other end. This coding will help you keep the + and - polarity consistent for all channels. If some of the speakers are wired with incorrect polarity you will significantly affect sound quality.

Speaker Wire Length and Gauge (thickness)

When selecting speaker wire, follow these guidelines:

•Keep the length of your speaker wire as short as possible.

•Use the thickest wire practical. For lengths greater than 50 feet, use speaker wire with an AWG (gauge) of 14 or lower. The smaller the AWG number, the thicker the wire.

•Do not use speaker wire that is thinner than 16 AWG.

•Keep wire lengths for both channels as close to equal as possible.

Bridged Mono Operation

Bridged operation configures the Left and Right channels to function as a single higher powered amplifier channel to drive a single speaker. This is how two Model 275 v.2 amps are used as monoblocks to power a pair of speakers. It’s also effective for powering a single passive subwoofer.

Careful attention must be paid to the total impedance of all speakers wired to the unit when it is set for bridged mono operation. When set to mono the Model 275 v.2 uses its R channel to amplify only the positive half of the audio signal and its L channel to amplify only the negative half of the audio signal. In effect, each channel ―sees‖ only half of the speaker’s rated impedance, so that a single 8 ohm speaker is actually a 4 ohm load when the amp is bridged to mono. A 4 ohm speaker is a 2 ohm load in bridged mono. This is why bridged mono power output can be much higher than the sum of the L and R channel outputs for stereo operation. When the Speaker Load switch is set to the 4-8Ω position the speaker impedance must be 8 ohms for bridged mono operation. This switch must be set to its 2-3Ω position if the speaker impedance is less than 8 ohms.

Setting Up the Model 275 v.2 for Bridged Mono Operation:

1.Turn the unit off and remove the AC cord.

2.Connect the single RCA cable from the preamp or audio controller to the R channel Input jack.

3.Set the Bridged Mono switch to the Bridged (Mono) position.

4.Set the Speaker Load switch to the correct position (see instructions on next page).

5.Connect the positive + lead of the speaker wire to the red R+ channel terminal of speaker pair A.

6.Connect the - negative lead of the speaker wire to the red L+ channel terminal of speaker pair A.

7.Do not connect the L- and R- speaker terminals.

8.If you have a second mono speaker repeat steps 4 - 6 with the speaker pair B terminals.

9.Reconnect the AC cord.

Note: Stereo sound will be faint and distorted if you accidentally leave the Bridging switch in its Mono position and a stereo pair of speakers are attached.

Note: The Model 275 v.2 will create more heat when it drives a bridged mono speaker or multiple speaker pairs. Lower impedance speakers will make it run even hotter. Heat buildup greatly reduces the life of the amplifier and nearby components. Please pay attention to the instructions for setting the Speaker Load switch to avoid overheating.

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.