Parasound Halo A31 for sale. Design and Setup of the Parasound Halo A 31 Power Amplifier Offering the same 250 WPC into 8 ohms and 400 WPC into 4 ohms that the A21 and A 51 do, the A 31 makes an ideal mate for your front three speakers without having to spend money on … Support. Like other Halo models, the A 31 is solidly built and has a clean, attractive, brushed-aluminum faceplate. After many years of dreaming about purchasing the A21, I have it now, and it is a truly remarkable amplifier. > 78 dB at 1 kHz; 400 watts RMS x 3, 20 Hz - 20 kHz, 4 Ω, all channels driven, Current capacity: Matched JFET inputs, MOSFET drivers, and high-current bipolar outputs contribute to its exceptional performance. It's fantastic for powering the front three channels of a home theater. Downloads. It has adjustable gain for up to +6 db over THX Reference level. The 1.5 kVA encapsulated toroidal power transformer with independent secondary windings for each channel and 98,400 µF power supply filter capacitance delivers an impressive current capacity of 60 amps per channel. < 0.2 % at full power, IM distortion: balanced 16 V rms You might also want to use the A 31 to power the center channel and two surround channels of your home theater. 5 Hz - 100 kHz, +0/-3 dB at 1 watt, Total harmonic distortion: "Remarkable definition…clean, luminous sound. However you employ the A 31, you will be delighted by its impeccable sonics, striking authority, and faithful reproduction of the smallest details. With its four feet removed, the A 31 chassis and front panel height occupies four rack spaces (7" or 176 mm). This allows the left and right front speakers to be powered by a dedicated two-channel power amp, such as the Halo A 21, or better yet, two JC 1 monoblock amps. The sound was so much fuller, deeper and smoother than the previous lineups of Denon All available for free download. Specifications. ", Secrets of Home Theater and High Fidelity Here are some of the practical Optional brackets are available for The A 31 is identical in performance and sound to the award- winning Halo A 51. Use the A 31 to power the front three channels in an AV receiver-based system. 60 amperes peak per channel, Power bandwidth: The complementary MOSFET driver stage relies on the firepower of 24 beta-matched 15 amp, 60 MHz bipolar output transistors and works in combination with a JFET input stage. OMG!! |. The component under review, the $2000 Halo A 21 stereo amp, is slotted in further down the Parasound line. AC present, channel status, and high temperature indicators team up with DC Servo and relay protection circuits to keep this powerhouse running safely at peak performance for years of reliable service. Add to that its prodigious power output and rock-solid build quality, and I can assure you: It's the real deal. Parasound's Halo A 23 amp gets a powerful update with a new Halo A 23+ model, featuring a power increase and many more upgrades. Here's one more suggestion. • 250 watts rms per channel into 8Ω, all channels driven. This is evident with the release of the new Parasound A 21+ stereo power amp ($3150), the successor to the A 21, which was originally launched in 2003. Now I'm This is the Parasound Halo A31. From a look the A21 seems to have similar specs but a cleaner layout (not so many caps strewn about the place) From the specs, the + adds about 25% more power,20% more uF (whatever that does for you) 50% reduction in Very high bias allows greater Class operating range than others. Beautifully implemented high-bias Class A / AB operation makes the most of an impressive 250-watt-per-channel power output at 8 ohms and 400-watts-per-channel at 4 ohms. 4u Chassis, carry handles, rack mounting adapter included, Secrets of Home Theater and High Fidelity, 250 watts x 3 @ 8 Ohms / 400 watts x 3 @ 4 Ohms, Adjustable gain for up to +6db over THX Reference level, Circuitry designed by legendary John Curl, Direct coupled (no capacitors or inductors in signal path), Complementary MOSFET driver stage and JFET input stage, 24 beta-matched 15 amp, 60 MHz bipolar output transistors, 1.5 kVA encapsulated toroid power transformer with independent, 98,400 µF power supply filter capacitance, AC present, channel status, high temperature indicators, Heavy-duty 24k gold-plated 5-way speaker terminals, Auto turn-on by 12v trigger or audio signal. ", Stereophile September 2012 Photos. Parasound emphasizes that their products are supported from their San Francisco headquarters, and at dozens of authorized service centers across the US. Reviews. On the rear panel are three groups of connectors/controls, one per channel, including balanced and unbalanced inputs and gain controls. The Parasound Halo A 31 was designed in response to increasing demand for a three-channel power amplifier that holds nothing back in power or performance. This blend of qualities made it a joy to listen to. Samsung Galaxy A31 Android smartphone. Specs. "Based on circuitry developed by John Curl for the highly praised Halo JC 1, the three-channel A 31 power amplifier is rated to deliver 250Wpc into 8 ohms or 400Wpc into 4 ohms. The sound quality of the A31 connected to a Yamaha cxa5100 was a start in the right direction. ", - Roger Kanno, SoundStage! You get a switchable phono stage, a headphone output and even tone controls. Parasound opted to give the A 52+ a basic, black look. The surround or back channels can then be powered by a smaller two-channel Parasound power amplifier, such as the Halo A 23. Unbalanced RCA and balanced XLR inputs. Firm and extended bass. You'll find lots of uses for the three-channel A 31. This blend of qualities made it a joy to listen to. Still, the slightly curved, anodized front panel lends it a degree of flair. • THX Ultra2 certified. Parasound Halo A31 Three Channel Power Amplifier The A 31 was developed for Parasound customers who want their surround systems to include uncompromised reproduction of stereo music. Auto turn-on by 12-volt trigger or audio signal simplifies home theater and multi-room operation. Parasound Halo A23 Stereo Amplifier Review In light of our slow shift toward two channel audio (no, we are not abandoning personal audio), I decided it would be a good idea to start with something basic, like a stereo amplifier. And despite what the purists say, on occasion, for example when playing a poorly engineered recording, they can be useful. Special relays bypass the AC "soft start" circuitry after it's done its job for the purest AC and the purest sound. "The Halo A 31 is able to drive any speaker you are going to throw at it and not complain, as well as being impeccably built and beautiful in appearance," notes Chris Heinonen in his December 5, 2012 review for Secrets of Home Theater and High Fidelity. ", - Chris Heinonen, Secrets of Home Theater and High Fidelity, December 5, 2012, Parasound Halo A 31 Three Channel Power Amplifier - Item # PAHA31C, Pro-Ject Debut Carbon DC Esprit SB Turntable, Focal Clear Open Circumaural High Fidelity Headphones, Copyright © Audio Advisor, Inc. 1981-2021, Parasound Halo A-31 3-Channel Amp Manual (PDF Format), 2019 Parasound Halo Product Line Brochure (PDF Format), Parasound Halo A 31 Three Channel Power Amplifier Product Reviews, 250 watts x 3 @ 8 Ohms / 400 watts x 3 @ 4 Ohms, Adjustable gain for up to +6db over THX Reference level, Circuitry designed by legendary John Curl, Direct coupled (no capacitors or inductors in signal path), Complementary MOSFET driver stage and JFET input stage, 24 beta-matched 15 amp, 60 MHz bipolar output transistors, 1.5 kVA encapsulated toroid power transformer with independent secondary windings for each channel, 98,400 µF power supply filter capacitance, AC present, channel status, high temperature indicators, Heavy-duty 24k gold-plated 5-way speaker terminals, Auto turn-on by 12v trigger or audio signal, 4u Chassis, carry handles, rack mounting adapter included, Parasound 5 year parts, 5 years labor warranty (USA purchases only), Power output: 250 watts RMS x 3 continuous, 20 Hz - 20 kHz at 8 ohms; 400 watts RMS x 3 continuous, 20 Hz - 20 kHz at 4 ohms, Current capacity: 60 amps peak per channel, Frequency response: 5 Hz - 100 kHz, +0/-3 dB at 1 watt, Total harmonic distortion: <0.2% at full power, <0.03% at typical listening levels, Signal-to-noise ratio: >112 dB, input shorted, IHF A-weighted; 102 dB, input shorted, unweighted, Interchannel crosstalk: >78 dB at 1 kHz, >63 dB at 20 kHz, Input sensitivity (for 28.28 V output into 8 ohm): unbalanced 1 V, balanced 1 V per leg, Power consumption: standby, <1 watt; maximum, 1800 watts, Dimensions: 17.5" wide, 19.125" deep, 7" high (7.625" with feet), Manufacturer's limited warranty: 5 years parts, 5 years labor. 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