Specs

Continuous power output, 20Hz - 20 kHz:

• 400 watts RMS x 1, 8 Ω
• 800 watts RMS x 1, 4 Ω
• 1200 watts RMS x 1, 2 Ω

Class A power output, 20Hz - 20 kHz:

• 25 watts, bias set to high
• 10 watts, bias set to low

Current capacity: 135 amperes peak

Power bandwidth: Hz - 120 kHz, +0/-3 dB at 1 watt

Total harmonic distortion:< 0.15 % at full power

IM distortion: balanced 16 V rms: < 0.03%

S/N ratio:

• >120 db, IHF A-weighted, bias set to high
• >122 dB, IHF A-weighted, bias set to low

Slew rate:> 130 V/µsecond

Dynamic headroom: > 1.8 dB

Input sensitivity:1 V for 28.28 V, THX Reference Level

Input impedance:100 k Ω

Damping factor: > 1200 at 20 Hz

Power Requirement: 

• 250 watts idle
• 1280 watts full power into 4 Ω

DC trigger output capacity:12 Vdc, 150 mA

Dimensions:17-1/2" w x 7-5/8" h x 20" d, 7" h without feet

Net weight: 64 lb.

JC1+ Manual

Spade Terminal Compatibility

TheAbsoluteSound.com, August 2022
TAS recommends power amplifiers in the $10K-$20K MSRP price range

Spare Change, June 2022

PARTTIME AUDIOPHILE BEST AMPLIFIERS, SUMMER 2022 GUIDE—
Parasound JC 1+ Monoblocks
"The first update from Parasound on the 20-year-old JC 1s, the Plus is Richard Schram and John Curl's effort to make a worthy successor that will stand the test of time. Powerful, clear and quite a lot of value when you compare it to more esoteric monsters, the JC 1+ is very neutral. "There was no major sense of lack of color or excitement, they simply tell a speaker to move like the music moves," we observed."

Tone Audio, October 2021
"I have yet to hear a pair of solid-state amplifiers that offer anywhere near this much sonic excellence and sheer power for anywhere near the price of these amplifiers. If someone whispered in my ear, "you're listening to a six-figure pair of amplifiers," I would believe them. The JC 1+ monos are that good, that refined, that musical."

Hi Fi Review (Hong Kong), August, 2021
"Even the harmonics and the hall ambiance have a vivid sensation and benefit from the JC 1+ lack of background noise. To let the sound and music in the signal appear more detailed and exquisite, picturing details of this solo violin recording are richer, and the interpretation is like constructing a more three-dimensional Zen garden and more encompassing."

The Absolute Sound, June 2021
"No doubt you can spend a lot more money on amplifiers ranging from $50,000 and up, and I'd be the last to dissuade anyone from chasing audio rainbows as vigorously as they please. The gains will be there in tonality, dynamics, and filigree of detail, particularly in the treble. But the JC 1+ monoblocks come so darned close to the best, in so many categories, that for more than a few listeners it may seem an otiose pursuit to look elsewhere. Parasound and John Curl deserve a rousing round of applause for producing a real-world-priced amplifier that delivers otherworldly sound."

Stereophile (John Atkinson), May 2020
"With JC 1+ amplifiers, the feeling of listening to a Steinway D in a real space was very satisfying. High frequencies were smooth and clean, more like what I experience from a good tube amplifier. Dynamics were extraordinary. Low-frequency power and delicacy! The improvement in its sound quality and the recent explosion of the prices of high-end, high-power amplifiers keep the JC 1+ competitive. This is a superb-sounding amplifier that will get the best from every loudspeaker with which it is partnered. Well done, Mr. Curl."
Manufacture Comments to the Stereophile Review

Secrets of Home Theater & High Fidelity (John Johnson), June 2020
"Parasound has long been admired for their preamplifiers and power amplifiers. The JC 1+ power amplifier is truly an achievement to the highest degree. The sound is exemplary and reflects its amazing design, while parts quality is a statement on its own. Proof of Performance for the Parasound has been verified. They are worth the price."

Positive Feedback May 2020
"I cannot think of a pair of monoblocks that offer a view anywhere near this close to the top of the heap for anywhere near their asking price. I can tell you that if I were shopping for a pair of monoblocks under $25,000, the Parasound Halo JC 1+ would be my first choice. Go give these new over-achievers a listen and be prepared to be bowled over by what you will hear. Most enthusiastically recommended."