Esteemed designer John Curl helped make the Halo JC 1 monoblock power amplifier Parasound’s flagship product for nearly decades.

Now, after a five-year collaboration by Curl and Parasound, the company is ready to roll out a successor to that ultra-successful audiophile component: the Halo JC 1+ monoblock amplifier.

Built to Beef Up Power

The impressive new component features several circuit improvements, according to the company. It delivers 450 watts into 8 ohms, 850 watts into 4 ohms, 1,300 watts into 2 ohms, and a peak current of 180 amperes, Parasound says.

Parasound adds that the Halo JC 1+ operates in pure Class A up to 25 watts and Class AB to full power, showcasing Curl’s attention to detail and sound quality.

“In early 2003, the JC 1 was an immediate success,” says Richard Schram, Parasound’s president. “We couldn’t imagine how to improve it. I was surprised and excited when John called me in early 2014 to discuss his ideas for a new amplifier that would significantly outperform the JC 1.”

Following the initial conversation, Parasound and Curl spent time in 2015 and 2016 to build prototypes to confirm Curl’s theories, and the sonic improvements he’d predicted, Schram says.

“The results were outstanding. We decided to create a new amplifier to honor the JC 1’s legendary reputation. The JC 1+ is a technological masterpiece, raising the bar for amplifier performance and value for years to come,” he enthuses.

At 83 pounds, the new JC 1+ is 30% heavier than the JC 1, the company notes. Its new power transformer offers 20% higher capacity, and additional Nichicon power-supply filter capacitors increase from 132,000 uF to 198,000 uF.

The amped-up new amplifier incorporates Sanken 15A/230V output transistors compared to 18 — a 33% peak current increase, Parasound adds.

Low Noise, Enhanced Circuitry

Meanwhile, the Halo JC 1+ is the first commercially built component to employ active high-frequency noise filtering with Bybee Music Rails, which the company says eliminating input stage noise that compromises sound quality.

Curl’s newly-designed driver stage utilizes a cascode circuit with “greater open-loop bandwidth and increased linearity,” according to the company. In another advancement for the JC 1+, the input and driver stages reside on FR-408 printed circuit board material, and the input-stage power supply is totally independent from the main power supply, Parasound points out.

Other sound improvements come from the proprietary design of Wilson Audio REL capacitors, which resists micro-vibrations that typically degrade the sound quality of other caps, the company says. The addition of an XLR Loop Out as well as a 12V-trigger/delayed turn-on augment the connectivity and utility when multiple JC 1+s are used in bi-, tri-, and quad-amp configurations, according to Parasound.

In terms of connections, Neutrik balanced locking XLR connectors, and Vampire unbalanced RCA output connectors facilitate bi-amping. Parasound-designed CHK Infinium speaker terminals handle spade lugs up to 16mm wide, banana plugs, and 5-AWG bare speaker wire.

Aesthetically, Parasound says the front panel not only matches the updated Halo family appearance, but also complements “the inner beauty” of the JC1+.

In black or silver finish, the Halo JC 1+ will be available from authorized Parasound dealers in Q1 2020, with a U.S. retail price of $8,495 each.