Model 2125 v.2

  • THX Ultra2 certified
  • 150 watts x 2 into 8 Ω (all channels driven)
  • 225 watts x 2 into 4 Ω or 2 Ω (all channels driven)
  • 400 watts x 1 bridged into 8 Ω or 4 Ω
  • 35 amps peak current per channel
  • 2 Ohm stable operation with load selector switch
  • Two pairs of speaker outputs with front panel A/B buttons
  • Rear-mounted lockout switch disables front A/B buttons
  • High pass filter, switchable for 20Hz or 40Hz
  • Automatic on/off by DC trigger with looping output
  • Automatic on/off by audio signal with 2 sensitivity settings
  • Fully discrete circuitry with high current toroid transformer
  • Bridging switch for stereo or mono operation
  • Efficient, low heat design
  • DC Servo and relay protection circuits
  • Rear-mounted left and right gain controls
  • Standby, channel status and high temperature indicators
  • Gold-plated RCA input jacks
  • Heavy duty 24k gold-plated 5-way speaker terminals
  • 115/230v selector on rear panel
  • 2U rack mount kit available separately (Model RMK22)

All Channels Driven
150 watts x 2, 8Ω
225 watts x 2, 4Ω
225 watts x 2, 2Ω (Load switch set to 2-3Ω)

Bridged Mono
400 watts x 1, 8Ω
400 watts x 1, 4Ω (Load switch set to 2-3Ω)

Current Capacity
35 amps peak per channel

Frequency Response
20 Hz - 50 kHz, +0/-3 dB, 1 watt
Dynamic Headroom - 1.3 dB

Total Harmonic Distortion
0.25% at full rated output
0.015% at average listening levels

IM Distortion - 0.05 %
Transient IM Distortion - Not measurable

S/N Ratio
114 dB at rated output, IHF A-weighted
106 dB at rated output, unweighted
93 dB at 2.828 V output, IHF A-weighted
84 dB at 2.828 V output, unweighted

Input Impedance - 33 k Ω

Input Sensitivity
1 V in for 28.28 V out, THX standard

Inter-Channel Crosstalk
85 dB @1 kHz, 73 dB @10 kHz, 67 dB @ 20kHz
Damping Factor - Over 150 at 20Hz
12V Trigger Turn On - DC 9 – 12V, 15 mA

Audio Turn On
Quieter: 1 mV
Louder: 6 mV

AC Power Requirement
110 - 120 V / 220 -240 V, 50 - 60 Hz
0.5 watts standby
32 watts Idle (no audio)
550 watts full output

Dimensions
   171/4" Wide
   16" Deep, with cables connected
   4.25" High with feet, 3.5" panel only (2U)
   (437 x 406 x 107mm, 88.2 mm panel only)

Net Weight - 27 lbs (12.3 kg)

Rack Mount Accessory
May be Purchased Separately: RMK22

HiFi Voice (Czech Republic) October 2015
"This combination of audio performance without the use of tone controls or filters is dynamic, precise and detailed. Control is evident across the audio spectrum even at high volume where there is sufficient power in reserve. Futhermore, there is no loss of resolution, even with quieter music and low level listening. Parasound manages to reproduce the essence of the vast majority of commercial recordings and various genres on CD or the stereo audio tracks on DVD or BluRay that would satisfy even the most demanding listener. I think the audience appreciated the especially strong, dynamic sound with superb control of bass at all volume levels and an imperceptible loss of the finest details on several audiophile SACDs."

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