Parasound JCM250 Compact Monoblock Amplifier

The JCM250 is a high-performance monoblock amplifier designed for listeners who want serious power without excessive size. Whether you’re driving demanding full-range speakers or crafting a powerful home theater front-end, it delivers authority and finesse—even when the music gets intense. Designed by John Curl, the JCM250 runs high-bias Class A/AB with up to 8 W in pure Class A (High Bias; 4 W in Low Bias) and delivers 250 W into 8 Ω, 450 W into 4 Ω, and 800 W into 2 Ω with 100 A peak current. The circuit is direct-coupled (no capacitors in the audio path) with a JFET input stage and MOSFET driver stage, plus XLR/RCA inputs and loop-outs for effortless bi-amping.

Integration is simple with 29 dB / 23 dB gain options, 12 V trigger or audio-sense auto-on, and a 2U chassis that’s easy to rack. Parasound also equips the input stage with Bybee Music Rails™ high-frequency filters. Circuitry designed by legendary John Curl, Ultra-high bias Class A/AB operation, Stable with speaker impedance dips below 1Ω, Bybee Music Rails™

– active high frequency filters for input stage, John Curl driver stage employs a cascode circuit for greater open loop bandwidth & superior linearity, Gain switch to select 29 dB or 23 dB gain for optimum compatibility with high gain preamps or extremely efficient speakers, CHK Infinium, custom 5-way speaker binding posts for easy bi-wiring, Neutrik locking XLR balanced input & loop output jacks, Vampire 24k gold-plated RCA input & loop output jacks, Direct-coupled signal path, no capacitors or inductors in the audio path, JFET input stage, MOSFET driver stage, 16 beta-matched 15 ampere, 230V, 60 MHz bipolar output transistors, Independent power supplies for input stage & driver stage, Full power is rated all the way down to 2Hz for unrestricted low-end bass, Harris hyper-fast soft-recovery bridge diode rectifiers, REL & Nichicon Muse capacitors, DC servo & relay protection circuits, AC turn-on in rush surge protection with relay bypass, Automatic turn-on by 12 V trigger or audio sensing, 2 rack space chassis with rear carry handles.