Single 8 Ohm Speaker, Two 8 Ohm Speakers

How to set the Speaker Load switch when the Model 2125 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 2125 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 2125 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 2125 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 2125 v.2’s L channel Input jack to then you’ll need a short RCA cable to connect the 2125 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 2125 the flexibility to drive very low impedance loads. Such situations can occur when the Model 2125 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 2125 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.

2125 V.2 specifications

The Parasound 2125 V.2 amplifier stands out as a premier choice for audiophiles seeking high-quality sound reproduction combined with solid build quality. It is well-regarded for its ability to deliver powerful, clear audio while maintaining the signature warmth that is often associated with high-end audio equipment. With a sleek design and robust features, the 2125 V.2 is an excellent addition to any home theater or audio system.

One of the primary features of the Parasound 2125 V.2 is its high-power output. The amplifier is capable of delivering 125 watts per channel into 8 ohms and 185 watts into 4 ohms, allowing it to drive a wide range of speakers with ease. This power output supports dynamic sound reproduction, crucial for producing the subtleties in both music and movie audio tracks.

The amplifier employs a linear power supply with a toroidal transformer, which is known for its efficiency and low noise. This design choice enhances the overall performance by reducing electromagnetic interference and ensuring a clean power delivery to the amplification stages. The use of high-quality components throughout the amplifier, such as durable capacitors and low-noise transistors, further contributes to its reliability and auditory fidelity.

In terms of technology, the Parasound 2125 V.2 incorporates a class AB amplifier topology. This hybrid design offers the benefits of both class A and class B amplifiers, delivering robust performance with minimal distortion. This results in a smooth, warm sound signature that is pleasing for extended listening sessions. The amplifier also features a low-frequency filter for optimized performance when used in home theater setups, allowing it to handle various audio formats without compromising on quality.

Additionally, the Parasound 2125 V.2 is equipped with a variety of connections, including balanced XLR inputs as well as unbalanced RCA inputs. This flexibility makes it easy to integrate the amplifier into different audio systems while ensuring compatibility with a wide range of equipment. For added versatility, the amplifier includes a trigger input, enabling remote operation when paired with compatible devices.

The build quality of the 2125 V.2 is another standout characteristic. Housed in a rigid metal chassis, the amplifier not only looks elegant but also protects its sensitive internal components. The front panel features a straightforward design with easy access to volume control and indicator lights that provide real-time feedback on the amplifier’s status.

In conclusion, the Parasound 2125 V.2 amplifier offers a potent blend of power, sound quality, and flexibility, making it an excellent choice for music lovers and cinephiles alike. Its well-thought-out design and engineering reflect Parasound's commitment to delivering exceptional audio equipment that can satisfy even the most discerning listeners.