Parasound HALO A23+ Power Amp
Two-Channel Power with Elegance and Precision
The Parasound A23+ brings studio-level amplification into your listening room—delivering clarity, depth, and control that defies its compact size.
Co‑designed by legendary engineer John Curl, it features a dual-mono Class A/AB architecture with independent transformers per channel. With 160 W per channel into 8 Ω (240 W into 4 Ω) and bridgeable to 500 W, along with balanced XLR and gold-plated RCA inputs, the A23+ integrates seamlessly into stereo or home theater systems.
Praised by reviewers:
- SoundStage! – “Parasound provides great value… I haven’t heard better sound or seen higher build quality at this price. An impressive power amplifier.”
- Home Theater Hi-Fi – “Solidly constructed and good‑looking amplifier… Balanced sonic characteristics with good presentation of musical details.”
- The Audio Tailor – Highlights “transparency from a sonorous 5 Hz sub-bass right through to 100 kHz,” pointing to exceptional clarity and signal purity.
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Specifications
- 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
- 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
- Width: 17-1/4" (437 mm) Depth: 15"-1/4" (388 mm) Depth, with cables 17" (432 mm) Height, with feet: 4-1/8" (105 mm) Height, without feet: 3-1/2" (89 mm), 2U
- Net Weight
- 27 lb. (12.2 kg)
- Shipping Weight
- 34 lb. (14.4 kg)
- Power Requirement
- Standby: <1 Watt Idle (no music playing): 75 Watts Typical Listening levels: 125 Watts Maximum: 800 Watts 110-125 VAC 60 Hz or 220-250 VAC 50 Hz
Manufacturer's Description — Parasound
Two-Channel Power with Elegance and Precision
The Parasound A23+ brings studio-level amplification into your listening room—delivering clarity, depth, and control that defies its compact size.
Co‑designed by legendary engineer John Curl, it features a dual-mono Class A/AB architecture with independent transformers per channel. With 160 W per channel into 8 Ω (240 W into 4 Ω) and bridgeable to 500 W, along with balanced XLR and gold-plated RCA inputs, the A23+ integrates seamlessly into stereo or home theater systems.
Praised by reviewers:
- SoundStage! – “Parasound provides great value… I haven’t heard better sound or seen higher build quality at this price. An impressive power amplifier.”
- Home Theater Hi-Fi – “Solidly constructed and good‑looking amplifier… Balanced sonic characteristics with good presentation of musical details.”
- The Audio Tailor – Highlights “transparency from a sonorous 5 Hz sub-bass right through to 100 kHz,” pointing to exceptional clarity and signal purity.
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Authorized dealers for Parasound HALO A23+ Power Amp
- Abt Electronics — online and in-store — Glenview, Illinois, United States (website)
- Acoustic Sounds — online and in-store — Salina, Kansas, United States (website)
- All Elite Audio — online and in-store — Perry Hall, Maryland, United States (website)
- All That Audio — in-store — Anaheim, California, United States (website)
- Alpha High End — online and in-store — Brasschaat, Vlaams Gewest, Belgium (website)
- Alta Fedelta — online and in-store — Lombardia, Italy (website)
- Analogue Seduction — online and in-store — Whittlesey, England, United Kingdom (website)
- Anointed Soundz — in-store — Cedar Hill, Texas, United States (website)
- Area Hifi — online and in-store — L'Eixample, Comunidad Valenciana, Spain (website)
- Audible Images — in-store — Melbourne, Florida, United States (website)
and 86 more verified dealers