Rear Panel Connections and Controls, Jacks | Parasound 2125 instruction

4REAR PANEL CONNECTIONS AND CONTROLS

Connection Precautions

Disconnect the AC cord before making or changing any input, trigger, or speaker wire connections. Make sure there is no strain or tension on any wires that could cause them to pull loose.

CAUTION

WARNING

To Prevent Electric Shock, Do Not

Remove Cover. No User-Serviceable

To Prevent Fire Or Shock Hazard,

2125 Two Channel Amplifier

Parts Inside. Refer Servicing To

Do Not Expose This Unit To Rain

Parasound Products, Inc.

Qualified Service Personnel.

Or Moisture.

San Francisco, CA U S A

Input

Loop

Level

Speaker Pair A

Speaker Pair B

High Pass Filter

Load

Auto Turn On

THX

Manual

Ground

Flat 20Hz

40Hz

Impedance

Voltage

Audio Sens 12V Trigger

In Loop

Stereo

Mono

Audio 12V

Max Min

Lift Norm

THX

Bridging

2-3

4-8

115V

230V

Ohms

60Hz

50Hz

Power Consumption: 550W

AC 115V/60Hz

AC 230V/50Hz

In Jacks

Connect the shielded audio cables from your preamplifier or system controller’s output jacks to the Model 2125’s L and R audio Input jacks. Use only the R channel jack for mono operation.

Loop Jacks

The jacks replicate the audio input signals to facilitate connections of other power amplifiers to the same preamplifier or system controller. Loop connection of multiple power amplifiers is called a “daisy chain.”

Note: You may loop the trigger connections of multiple Parasound power amplifiers without overloading the surround controller or preamplifier trigger outputs.

Input	Loop	Level			Spe
			High Pass Filter		R
	L
		THX	Flat 20Hz	40Hz
			Flat 20Hz	40Hz
	R		Stereo	Mono
	Mono		Stereo	Mono
		THX	Bridging
		THX

R (Right) and L (Left) Level Knobs

You can adjust the listening level for each channel by turning its Level knob clockwise to increase gain or counter-clockwise to reduce gain. The maximum settings correspond to THX Reference Level where the gain is 29: 1 volt at the input jacks corresponds to a 28.28 volts at the speaker terminals. THX recommends this setting whenever the 2125 is installed with other THX-certified components.

Note: You may wish to experiment with different gain settings on your preamp or a non-THX surround controller and on the Model 2125 to find a combination of gain settings where your system’s background noise is lowest. Sound professionals call these adjustments “gain staging.”

Note: Only the R channel Level knob is used for bridged mono operation.

2125 specifications

The Parasound 2125 is a high-performance power amplifier that has carved out a niche for itself among audiophiles and home theater enthusiasts. Renowned for its impressive sound quality and robust design, it serves as a reliable option for those seeking to drive their loudspeakers with precision and power.

One of the standout features of the Parasound 2125 is its high current capability, which ensures that the amplifier can deliver ample power even to low-impedance speakers. With a power output of 125 watts per channel into 8 ohms and 220 watts per channel into 4 ohms, it provides headroom for dynamic peaks in music and movie soundtracks. This makes the 2125 an excellent choice for a wide variety of speaker types and listening environments.

The design of the Parasound 2125 is characterized by its Class AB operation, which combines the efficiency of Class A and the power of Class B. This results in an amplifier that can reproduce audio with minimal distortion and noise, thus enhancing the listening experience. The unit features a toroidal transformer, known for its low electromagnetic interference and high efficiency, contributing to the 2125's clean and detailed sound signature.

In addition to its powerful output, the Parasound 2125 comes equipped with a range of advanced technologies. For example, its multi-layered, aluminum chassis not only adds to its aesthetic appeal but also reduces unwanted resonance and vibration, further preserving audio fidelity. The amplifier features a comprehensive protection circuit that safeguards against overheating and short circuits, ensuring longevity and reliability.

The 2125 also includes flexible connectivity options, with both balanced XLR and unbalanced RCA inputs, allowing users to tailor their audio setup according to their preferences. The amplifier's rear panel includes gold-plated binding posts that facilitate secure and efficient speaker connections.

Overall, the Parasound 2125 stands out as a formidable power amplifier that boasts impressive specifications and features designed to appeal to discerning listeners. Its combination of powerful output, sophisticated design, and high-quality components make it an ideal solution for those looking to enhance their audio systems, whether for music playback or home theater applications. With the Parasound 2125, users can expect an immersive listening experience that brings their favorite sounds to life.