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PARASOUND A23+ Stereo Power Amplifier
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PARASOUND A23+ Stereo Power Amplifier PARASOUND A23+ Stereo Power Amplifier PARASOUND A23+ Stereo Power Amplifier PARASOUND A23+ Stereo Power Amplifier PARASOUND A23+ Stereo Power Amplifier PARASOUND A23+ Stereo Power Amplifier PARASOUND A23+ Stereo Power Amplifier

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PARASOUND A23+ Stereo Power Amplifier

160 Watt per channel Stereo Power Amplifier

As low as $3,195.00
SKU
parasound-a23+
OPTIONS

 "Parasound provides great value in the Halo A 23+. I haven't heard better sound or seen higher build quality at this price. An impressive power amplifier."

Soundstage Network  July 2019
Reviewer's Choice

Changes from the original A 23→A 23+

  • 125 → 160 Watts (8Ω)
  • 225 → 240 Watts (4Ω)
  • 400 → 500 Watts (bridged)
  • Filter cap: 40,000 uF →54,400 uF
  • Crosstalk (20kHz): 63dB → 70dB
  • Transformer size: 1.0 kVA → 1.1 kVA
  • Refined Halo cosmetic with aluminum end caps & gold highlights
  • Updated rear panel with heavy duty speaker terminals from HINT 6
  • Upgraded internal gold on gold audio connections
  • Updated auto turn on circuit
  • 160 watts x 2 @ 8 Ω RMS, both channels driven
  • 240 watts x 2 @ 4 Ω RMS, both channels driven
  • 500 watts x 1 @ 8 Ω, in bridged mode
  • Circuitry designed by legendary John Curl
  • High bias Class A/AB operation
  • 45 amperes peak current per channel
  • Stable with speaker impedance dips below 2 Ω
  • Balanced inputs with discrete circuits
  • Heavy-duty 24k gold-plated 5-way speaker binding posts
  • Gold-plated RCA input & loop output jacks
  • Direct-coupled signal path, no capacitors or inductors
  • DC Servo and relay protection circuits
  • AC turn-on inrush surge protection with relay bypass
  • JFET input stage, MOSFET driver stage
  • 12 beta-matched 15 ampere, 60 MHz bipolar output transistors
  • 1.1 kVA shielded toroid transformer w/ independent windings for each channel
  • Independent power supplies for input stage, driver stage and output stage
  • 54,400 µF filter capacitors for output stages
  • Full power is rated all the way down to 5Hz for unrestricted low-end bass
  • Harris hyper-fast soft-recovery bridge diode rectifiers
  • Automatic turn-on by 12 V trigger or audio sensing
  • 2 rack space chassis with rear carry handles
  • Rack mount hardware available separately
  • Available in silver or black

Power Output – Stereo Mode (0.06% THD)

  • 160 watts x 2, 8 Ω both channels driven
  • 240 watts x 2, 4 Ω both channels driven

Power Output – Stereo Mode (0.9% THD)

  • 210 watts x 2, 8 Ω both channels driven
  • 300 watts x 2, 4 Ω both channels driven

Power Output – Bridged Mode (0.06% THD)

  • 500 watts x 1, 8 Ω
    • Bridged 4 Ω operation is not recommended

Power Output – Bridged Mode (0.9% THD)

  • 600 watts x 1, 8 Ω
    •  Bridged 4 Ω operation is not recommended
    • All Power measurement are at 120 VAC, RMS continuous power, full audio band (20 Hz - 20 kHz)

Current Capacity

  • 45 amps peak, per channel

Slew Rate

  • > 130 volts per microsecond

Frequency Response

  • 5 Hz - 100 kHz, +0/-3 dB
  • 20 Hz - 20 kHz, +0/-0.25 dB

Total Harmonic Distortion (THD)

  • < 0.06 % at full power
  • < 0.03 % at typical listening levels

IM Distortion

  • < 0.04 %

TIM

  • Unmeasurable

Inter-channel Crosstalk

  • > 85 dB at 1 kHz
  • > 70 dB at 20 kHz

Input Impedance

  • Unbalanced: 33 kΩ
  • Balanced: 66 kΩ,(33 kΩ per leg)

Total Gain

  • 29 dB

Input Sensitivity for 28.28 V Out (8 Ω Load)

  • Unbalanced: 1 V
  • Balanced: 1 V per leg

S/N Ratio

  • > 112 dB, input shorted, IHF A-weighted
  • > 107 dB, input shorted, unweighted

Damping Factor

  • > 800 at 20 Hz

DC Trigger Requirements

  • +9 Vdc to +12 Vdc, 5 mA

Audio Trigger Requirements

  • 2 mV - 10 mV

XLR Pin Identification

  • 1 = Ground (Shield)
  • 2 = Positive
  • 3 = Negative (Return)

Dimensions

  • 437mm Width
  • 388mm Depth (432 with cables fitted)
  • 105mm Height

Net Weight

  • 12.2kg

Shipping Weight

  • 14.4kg

Power Requirement

  • 1 Watt Standby
  • 75 Watt Idle (no music playing)
  • 125 Watt Typical Listening Levels
  • 800 Watt PEAK
  • 110-125VAC 60Hz or 220-250VAC 50Hz (AC mains voltage switch on rear panel)

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