Parasound Troubleshooting Common Issues for Stereo Amplifiers
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Problems and Remedies

Unit Will Not Turn On

•Check the setting of the Turn On Options switch. (The front panel Power button will be disabled if the switch is set to Audio or 12V). First try the Manual position and see if the unit will turn on by pressing the front panel Power button.

•If using Audio Turn on, try increasing the sensitivity of the audio trigger by setting the Turn On Option switch to the ―Quieter‖ position.

•If using Audio Turn on and you need the Model 2125 v.2 to turn on at an even lower volume level, simply turn down its L and R Level controls. Try setting the level controls at 12 o’clock and see if the volume level is low enough when the amp turns on.

•Check that the AC power is live.

No Sound From the Speakers (but amp turns on)

•Ensure that the front panel speaker buttons for A and B are turned on (button pressed in).

•Try turning up the Level controls for the Left and Right channel.

•Check that input cables and speaker wires are secure at both ends (turn amp off first).

•Make sure the preamp is switched to the correct input.

•Is the Protect light illuminated? Check for excessive temperature, short-circuited speaker wires, very low impedance speaker load, and inadequate ventilation.

Background Hum or Hiss

•If you have cable or satellite TV, try disconnecting the incoming TV or satellite cable; if the hum is eliminated you will need a ―cable TV ground isolator‖ or contact your TV service provider for assistance.

•Make sure insulating shoulder washers are used if unit is rack mounted.

•Make sure all equipment is plugged in to the same AC outlet to eliminate ground loops.

•Try turning down the input Level controls.

•Move audio cables and AC cords away from each other.

•Try different routes for the audio cables and AC cords.

The Amp is Overheating or the Hi-Temp Indicator is Illuminated

•Increase ventilation around the Model 2125 v.2.

•Check speakers for faults.

•Change the Speaker Load switch to the 2-3Ω setting.

•Remove any nearby external sources of heat such as other audio equipment or heaters.

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Contents Model 2125 Important Safety Instructions Table of Contents Thank You for Choosing Parasound Important Warranty informationParasound Staff Keeping Records for Future Reference Unpacking Your Model 2125 Placement GuidelinesVentilation Requirements Rear Panel Connections and Controls AC Mains VoltageBridged Mono Switch Front Panel Speaker Selector Lockout SwitchHigh Pass Filter Switch Right and L Left Level KnobsSetting Up the Model 2125 v.2 for Bridged Mono Operation Speaker Wire Length and Gauge thicknessBridged Mono Operation Speaker TerminalsSingle 4 or 6 Ohm Speaker Single 8 Ohm SpeakerTwo 8 Ohm Speakers Manual Position Turn On Options SwitchAudio Position Automatic on/off 12V Position Automatic on/off12V Loop Out Jack Volt Input Jacks5mm and 2.5mm trigger jacks Front Panel Operation Amp is Overheating or the Hi-Temp Indicator is Illuminated Problems and RemediesUnit Will Not Turn On No Sound From the Speakers but amp turns onAre You Having Difficulty? Repair or ServiceSpecifications Parasound Products, Inc McKinnon Ave, San Francisco, CA

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.
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