The Article
Halo JC5 stereo power amplifier From Parasound
22nd July 2018
Designed by John Curl, the Halo JC5 combines two Halo JC 1 monoblock power amplifiers into a single chassis running via Class A/AB topography
High bias class A/AB provides 12W per channel pure class A power and class AB to its 400W 8 ohm rating. The Halo JC5 can deliver 600W per channel into 4 Ohms and can be bridged to mono for 1,200W into 8 ohms. The output stage employs 24 beta-matched, 15 ampere, 60MHz bipolar transistors to deliver a peak current of 90 amperes.
The power supply employs a 1.7kVA shielded toroid power transformer with a H18 grade steel core. It has independent secondary windings for its dual-mono power supply. Independent power supplies for left and right channel input stages employ filter capacitors totalling 8,880µF. Driver and output stages employ Rubicon filter capacitors totalling 132,000µF.
The Halo JC 5 is direct-coupled, protected by DC servo circuits to eliminate coupling capacitors, to extend bass response down to 5Hz. Its balanced inputs use discrete circuits with Neutrik locking XLR connectors.
The connecting hardware includes Vampire 24k gold-plated RCA input and loop output jacks. Five-way “propeller” speaker binding posts are custom-manufactured for Parasound by CHK Infinium. They are 24k gold-plated and accept 7-gauge bare wire.
The Halo JC 5 is available in silver or black. Rack mount hardware for its four rack space chassis is included. The net weight is 33kg and the price is £6,999
For more information on the Halo JC5, click www.connecteddistribution.com or call 01242 511133
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Very nicely built. Hopefully the extra outlay enables UK/USA manufacture?
Attention all power-amplifier ‘hunters’ -consider only competent designs utilizing the speed, alacrity, slew-rate, linearity and current delivery of models utilizing bi-polar output devices.
There is a reason why the finest amplifiers (of all time) utilize this type of output transistor.
Right then, carry on … (lol)
pj