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"Editors' Choice Award" 2012 - The Absolute Sound Magazine
"Rhythmically Right" THX Ultra 2-Certified Amp
Parasound's Halo A 23 stereo amplifier combines superior technology, incredible sound, advanced features, and attractive industrial design. With high current Class A/AB amplification, smooth sounding MOSFET drivers, and balanced XLR inputs, it will bring out the best in any source material from Franz Schubert to The Avengers
The A 23 won the coveted "Editors' Choice Award" in the October 2007 issue of The Absolute Sound magazine, which calls it "musically involving."
"It was so rhythmically right," marvels Shane Buettner in The Absolute Sound. "The subtlest aspects of musical timing were always apparent..." According to Buettner, "I was impressed with the A23's resolution, which was really quite astonishing."
Auditioning the Halo A23 power amp and the P3 preamp together, Eric Hetherington writes in December 1, 2004 GoodSound! review, "I found the Parasounds’ sonic virtues to be many and their overall value to be greater than their prices. Good value and good sound: a winning combination!" He concludes, "Anyone seeking a new pre-power pair within the GoodSound! price range owes it to him- or herself to check these out."
The A 23 boasts 125 watts of THX Ultra 2 certified power per channel at 8 ohms and includes an adjustable audio sensitivity trigger as well as a 12-volt trigger for ease of operation with other hi-fi and home theater components. At 4 ohms, the Halo delivers 200 watts per channel, and can also be operated in bridged mono for a power delivery of 400 watts.
Advanced John Curl-Designed Circuitry
The circuitry of the A23 was engineered by legendary audio designer John Curl. Its direct-coupled topology uses no capacitors or inductors in the signal path for pure, uncolored sound. Balanced inputs with discrete circuits and XLR connectors yield dead quiet operation. The complementary JFET input stage and MOSFET drive stage incorporates 12 beta-matched 15 amp, 60 MHz bipolar output transistors for pristine sound. The high-bias "Class A"/"Class AB" operation blends best sound with highest efficiency performance.
The A23's custom-made, high-current power supply is specially designed for exceptionally quiet operation along with ample power for climactic music passages. The 785VA encapsulated toroidal power transformer uses independent secondary windings for each channel along with a 48,000 µF power supply filter capacitance. DC servo and relay protection circuits keep operation safe and reliable. And Parasound backs the A23's reliability with an impressive 10-year warranty for parts and five years for service.
No Need for a Remote
The front panel of the A23 looks great even when the unit is turned off. When you switch the Halo on, LEDs display AC-present, channel, and high temperature status. Adjustable signal sensing can be set to automatically power up the A23 when it receives a signal from your preamp or other compatible component (or when it receives a 12-volt trigger command), eliminating the need for yet another wireless remote! The rear panel includes gain controls, heavy-duty 24k gold-plated five-way speaker binding posts, and a ground lift switch that can help eliminate any audible hum caused by the presence of ground loops in your hi-fi or home theater system.
"You'll Have to Spend a Whole Lot More for Better"
"You'll have to spend more money to get better performance, in many cases a lot more," cautions Shane Buettner in The Absolute Sound. "This Halo P3 / A23 combo is the kind of system that should be celebrated as an invitation to participate in high-end audio as a hobby. And it continues Parasound's tradition of giving people more performance for the money than they have any right to expect."
Parasound products cannot be shipped outside the USA.