Front Panel Buttons and Display

Power Button

Press the Power button once to turn the Model 2125 on, press it again to turn it off. The Power button is inoperative when the Auto Turn On switch is set to Audio or 12V.

Note: It is normal for the 2125 Protect indicator to flash briefly right after turn on.

Protect

Hi Temp

A B

A and B Speaker Select Buttons

These buttons turn on the speaker pairs connected to the corresponding Speaker Pair A and B terminals. They will also select two single mono speakers.

Note: The front panel buttons and switches activate relays which perform the actual speaker switching. The contacts in the relays will last longer if you don’t press the A and B buttons to turn speaker pairs on and off while the 2125 is playing at high volume.

Protect Indicator

The Protect indicator will illuminate red if the Model 2125 experiences an external fault condi- tion and the unit will stop playing. This prevents possible damage to the unit from continued operation. Examples of external fault conditions are short circuited speaker wires, excessive heat, and trying to drive too many speakers at high levels.

If Protect is illuminated you need to locate and correct the fault; for example, remove the short circuit, let the unit cool down, check the load impedance and the setting of the Load Impedance switch, lower the volume level. To reset the protection circuit you need to turn the unit off.

Turning it off:

•Auto Turn On switch (on the rear panel) in the Man position: press the Power button on the front panel.

•Auto Turn On switch in the 12V position: turn off the 12V trigger source; the 2125 will turn itself off right away. You can also turn it off by unplugging its AC power cord.

•Auto Turn On switch in the Audio position: turn off the preamplifier, surround controller or system controller that drives your 2125. You can also unplug the 2125’s AC power cord.

Note: It requires approximately 15 minutes after removing the audio source before the 2125 turns itself off. If you don’t want to wait and you have access to its AC cord, simply unplug it. Leave it off and/or unplugged for awhile to cool down and you’re confident the fault is corrected. If you unplugged its AC power cord to turn it off, plug it in again.

Hi-Temp Indicator

Hi-Temp will illuminate red when the Model 2125 exceeds its maximum safe operating tem- perature. If the heat persists, the unit will activate its protection circuit and stop playing. It will remain in this protection mode until the temperature drops and the unit is turned off to reset its protection circuit. Use the same turn-off procedure as above. If Hi-Temp appears, it’s likely the unit is been over-driven at too high a listening level or is attempting to drive a speaker load impedance that is too low. It’s probable the unit has not been provided with sufficient ventila- tion. These conditions must be corrected before turning it on again to resume operation.

L and R Channel Status Indicators

L and R will illuminate green when the Model 2125 power is on and it is operating normally. The L indicator will not light if a fault is only in the left channel; the R indicator will not light if a fault is only in the right channel. Neither L or R indicators will illuminate if there is a general fault or if the temperature is too high.

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.