Parasound
Parasound Halo A 31 Three Channel Power Amplifier
Best three-channel amplifier for high-end home theater enthusiasts.
Experience uncompromising power and pristine audio with the Parasound Halo A 31. This three-channel amplifier delivers exceptional sonics and authority, perfect for powering the front three channels of your home theater or enhancing your AV receiver setup. Designed by legendary John Curl, it features high-bias Class A/AB operation for superior sound quality. With 250 watts per channel into 8 ohms and 400 watts into 4 ohms, plus THX Ultra 2 certification, the A 31 ensures a captivating, movie-theater-like experience with faithful reproduction of every detail.
$4000.00
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Owner Satisfaction
4.7
/ 5
Category Rank
421
/ 1684
#421 in Power Amplifiers
Price vs Category Average
-52%
Below average
Power Output
25038
/ watts RMS x channels into Ω
Who it's for
- Audiophiles seeking transparent and highly detailed sound reproduction
- Home theater owners using power-hungry, demanding speaker systems
- System builders requiring versatile front-stage or bi-amping configurations
Who should skip it
- Budget-conscious buyers prioritizing value over premium performance
- Users with limited rack space or small media cabinets
- Owners unable to provide adequate ventilation for heat dissipation
Performance breakdown
Power Delivery
Massive current reserves drive demanding speakers with effortless authority and control.
Sonic Transparency
John Curl’s circuit design preserves the delicate nuances of every recording.
Build Integrity
Heavy-duty construction ensures long-term stability and vibration-free performance.
Cinematic Dynamics
THX Ultra 2 certification guarantees reference-grade impact for home theater setups.
System Integration
Balanced inputs and adjustable gain offer flexible matching with high-end processors.
Thermal Management
High-bias operation maintains cool, consistent performance during extended listening sessions.
Key Specs
Power Output
250 watts RMS x 3 channels into 8Ω
Power Output
400 watts RMS x 3 channels into 4Ω
Frequency Response
5 Hz - 100 kHz, +0/-3 dB at 1 watt
Total Harmonic Distortion
< 0.2% at full power
Signal-to-Noise Ratio
> 112 dB, IHF A-weighted
Input Impedance
Unbalanced: 47k Ω, Balanced: 94k Ω
Input Connection Type
RCA, XLR
Output Connection Type
Binding Posts
Features
- Legendary John Curl design for audiophile performance.
- High-bias Class A/AB operation for optimal sound.
- Direct-coupled design for pure audio.
- Robust power supply for high current capacity.
- THX Ultra 2 certified for cinematic sound.
- Adjustable gain for customized output.
- Automatic turn-on for convenience.
- Heavy-duty gold-plated speaker terminals.
What customers say
Customers consistently praise the Parasound Halo A 31 for its exceptional sound quality and robust build. Many highlight its ability to deliver powerful, clean audio, bringing a noticeable improvement to their speaker systems. Users frequently commend its detailed, dynamic presentation and its reliable performance over time. The amplifier is often seen as a significant upgrade, offering a premium audio experience that justifies its investment. Its solid construction and impressive sonic clarity are recurring positive themes.
Know before you buy
The A 31 is a three-channel power amplifier specifically designed to drive the front left, center, and right speakers in a high-performance home theater system. It is an ideal upgrade for users looking to offload the power demands from their AV receiver to achieve cleaner, more authoritative sound.
Yes, the A 31 is fully capable of driving 4-ohm speakers. It delivers 400 watts per channel into 4 ohms, ensuring it maintains stable performance even with more demanding speaker loads.
Yes, the A 31 features both balanced XLR and unbalanced RCA inputs. Using the balanced XLR inputs is recommended if your pre-amplifier or processor supports them, as they provide better noise rejection over longer cable runs.
No, the A 31 is not bridgeable. It is designed as a dedicated three-channel amplifier, and its internal architecture is optimized for high-current, high-bias operation across those specific channels.
Yes, the A 31 is rack-mountable. Its dimensions and chassis design allow it to be integrated into standard professional or home audio equipment racks.
THX Ultra 2 certification indicates that the amplifier meets rigorous standards for power output, low distortion, and thermal stability. Essentially, it guarantees that the unit can reproduce cinematic soundtracks at reference volume levels without audible strain or clipping.
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$4000