Parasound HALO A31

Overview

The Parasound Halo A31 is a three channel power amplifier built around a John Curl designed circuit topology, making it a natural anchor for a high performance stereo or the front three channels of a serious home theater. It delivers substantial continuous power to each channel with the kind of high current headroom that keeps low impedance and reactive loudspeaker loads under firm control.

Balanced and single ended inputs, independent DC servo circuits, and a beefy toroidal transformer support a presentation that is dynamic, composed, and quiet. The Halo character leans toward musical honesty with authority in the low end and clean extension up top, so the amplifier reveals what the source and preamplifier feed it rather than imposing a heavy signature.

Practical touches include automatic turn on options, a front panel that fits neatly in a rack, and generous binding posts. As an authorized Parasound dealer, All Elite Audio supports the A31 with full factory backing.

Key Features

• John Curl designed Halo circuit topology for low distortion and refined sound
• Three independent high current channels ideal for stereo plus center or three channel front stages
• Large toroidal power transformer for strong dynamic headroom
• Balanced XLR and single ended RCA inputs on every channel
• High damping factor for tight, controlled bass on demanding speakers
• DC servo and relay protection circuitry for reliability and quiet operation
• Auto turn on via 12V trigger or audio sensing plus manual mode
• Heavy duty gold plated binding posts for secure speaker connections

How the A31 Compares

Parasound A31 vs Parasound JCM250 Monoblock

The JCM250 sits above the A31 as a monoblock, dedicating an entire chassis and power supply to a single channel for maximum isolation and current delivery. Choose the JCM250 pair when you want the ultimate in channel separation and headroom for a two channel system. The A31 remains the smarter choice when you need three channels in one box for a stereo plus center configuration. See the Parasound JCM250 Monoblock.

Parasound A31 vs Parasound A23+

The A23+ is the step down two channel Halo amplifier, offering the same family character in a lighter, lower power package. The A31 provides an additional channel and greater current reserves for larger rooms or harder to drive speakers. Pick the A23+ for an efficient two channel setup and the A31 when you want more power or three channel flexibility. See the Parasound A23+.

Parasound A31 vs Parasound HALO A51

The A51 shares the Halo lineage but spreads its design across five channels for a complete surround front stage. The A31 concentrates similar engineering into three channels, which suits stereo with a center or a smaller theater. Move to the A51 when you need full multichannel amplification in one chassis. See the Parasound HALO A51.

Parasound A31 vs Parasound JC5

The JC5 is a two channel amplifier that pushes the John Curl approach further with higher rated output and reference level ambitions. The A31 answers a different brief with three channels and strong all around performance for mixed music and theater duty. Consider the JC5 for a dedicated high output stereo rig and the A31 for versatile multichannel use. See the Parasound JC5.

Recommended Speakers and Preamplifier

The A31 has the power and grip to drive both easy standmounts and demanding floorstanders, so it pairs well with a range of speakers and a matching Parasound preamplifier.

• Parasound Halo P6 Preamplifier The natural control center for the A31, offering balanced outputs, bass management, and a built in DAC that matches the amplifier's character and connections.
• Parasound Halo P6 Preamplifier Silver Identical performance to the P6 in a silver finish for those who want a cohesive Parasound stack in a lighter cosmetic scheme.
• Spendor A7.2 Floorstanding Loudspeaker The A31 has ample current to open up the A7.2, delivering a refined, room filling sound with controlled bass in medium to large spaces.
• Klipsch Forte IV Highly efficient and dynamic, the Forte IV lets the A31 run relaxed while trading on its clean power for effortless, lively presentation.
• Amphion Argon 3X A precise standmount that benefits from the A31's grip and quiet backdrop, ideal for a near to mid field listening room.

Frequently Asked Questions

What is the Parasound Halo A31?
It is a three channel power amplifier from Parasound's John Curl designed Halo series, suited to high performance stereo or the front channels of a home theater.

How much power does the A31 deliver?
It is rated at 250 watts per channel into 8 ohms and 400 watts per channel into 4 ohms with all channels driven.

Who designed the A31?
The circuit topology was designed by legendary audio engineer John Curl as part of Parasound's Halo line.

Does the A31 have balanced inputs?
Yes, each channel offers both balanced XLR and unbalanced RCA inputs.

Can I use the A31 for home theater?
Yes, its three channels are ideal for driving left, center, and right in a theater front stage, and it can be paired with additional amps for surrounds.

Can the A31 be used as a two channel amplifier?
Yes, you can use two channels for stereo and leave the third unused or dedicate it to a center or subwoofer feed.

What is the damping factor of the A31?
It exceeds 800 at 20 Hz, giving tight control over the woofer and reliable bass performance.

How does the A31 handle low impedance speakers?
Its high current design and stable power supply allow it to drive demanding 4 ohm and reactive loads with composure.

Does the A31 have automatic turn on?
Yes, it offers 12V trigger and audio sensing auto turn on, plus a manual power mode.

How heavy is the A31?
It weighs approximately 60 pounds, reflecting its large toroidal transformer and robust build.

Will the A31 fit in a rack?
Yes, it uses a standard width chassis and can be rack mounted with the supplied hardware where included.

What preamplifier should I pair with the A31?
The Parasound Halo P6 is the natural match, providing balanced outputs and features that complement the amplifier.

How does the A31 differ from the A23+?
The A23+ is a two channel amp with lower power, while the A31 adds a third channel and greater current reserves for larger systems.

How does the A31 compare to the JCM250?
The JCM250 is a monoblock that dedicates a full chassis to one channel, while the A31 puts three channels in one box for greater flexibility.

What speakers pair well with the A31?
It matches well with efficient floorstanders like the Klipsch Forte IV, refined models like the Spendor A7.2, and precise standmounts like the Amphion Argon 3X.

Does the A31 include a DAC?
No, it is a pure power amplifier. Digital conversion is handled by a preamplifier such as the Halo P6.

What is the warranty on the A31?
Parasound USA covers the Halo series with 3 years parts and labor, with cooling fans, remotes, and displays covered for 1 year.

Does the A31 run hot?
It uses a substantial heat sink and cooling design to manage temperature, and it should be given adequate ventilation for reliable operation.

Is the A31 a good foundation for future upgrades?
Yes, its power and flexibility let it anchor a growing system, and it pairs naturally with additional Parasound components.

Why buy from All Elite Audio?
All Elite Audio is an authorized Parasound dealer in Maryland, offering full factory warranty support, expert guidance, and in stock availability.