400 watts x 2 @ 8 Ω RMS, both channels driven

600 watts x 2 @ 4 Ω RMS, both channels driven

1200 watts x 1@ 8 Ω, in bridged mode

Circuitry designed by legendary John Curl

Ultra-high bias Class A/AB operation

12 watts per channel of pure Class A power

90 amperes peak current per channel

Stable with speaker impedance dips to 1.5 Ω

Balanced inputs with discrete circuits

CHK Infinium, custom 5-way speaker binding posts

Neutrik locking XLR input connectors

Vampire gold-plated RCA input & loop output jacks

Direct-coupled signal path, no capacitors or inductors

DC Servo and relay protection circuits

AC turn-on inrush surge protection with relay bypass

Dual-mono input stages with ±110 volt DC rails

JFET input stage, MOSFET driver stage

24 beta-matched 15 ampere, 60 MHz bipolar output transistors

1.7 kVA shielded toroid power transformer with independent windings for each channel

Independent power supplies for left & right channel input stages, driver stages, output stages

8,880 µF Nichicon Gold Tune filter capacitors for input stages

132,000 µF Rubycon filter capacitors for output stages

Full power is rated all the way down to 5Hz for unrestricted low-end bass

Harris hyper-fast soft-recovery bridge diode rectifiers

Automatic turn-on by 12 V trigger or audio sensing

4 rack space chassis with rear carry handles

Rack mount hardware is included

Available in silver or black

Power Output – Both Channels Driven
400 watts x 2, 8 Ω
600 watts x 2, 4 Ω

Power Output – Bridged Mode
1200 watts x 1, 8 Ω
Bridged 4 Ω operation is not recommended

Power measurement parameters are at 120 VAC:
0.05% THD, RMS continuous power,
full audio band (20 Hz - 20 kHz)

Current Capacity
90 amps peak, per channel

Slew Rate
> 130 volts per microsecond

Frequency Response
5 Hz - 100 kHz, +0/-3 dB
20 Hz - 20 kHz, +0/-0.25 dB

Total Harmonic Distortion (THD)
< 0.05 % at full power
< 0.03 % at typical listening levels

IM Distortion
< 0.04 %

TIM
Unmeasurable

Inter-channel Crosstalk
> 87 dB at 1 kHz
> 72 dB at 20 kHz

Input Impedance
Unbalanced: 33 kΩ
Balanced: 66 kΩ,(33 kΩ per leg)

Total Gain
29 dB

Input Sensitivity for 28.28 V Output into 8 Ω
Unbalanced: 1 V
Balanced: 1 V per leg

S/N Ratio
> 116 dB, input shorted, IHF A-weighted
> 111 dB, input shorted, unweighted

Damping Factor
1000 at 20 Hz

DC Trigger Requirements
+9 Vdc to +12 Vdc, 5 mA

Audio Trigger Requirements
2 mV - 10 mV

XLR Pin Identification
1 = Ground (Shield)
2 = Positive
3 = Negative (Return)

Dimensions
Width: 17-5⁄8" (448 mm)
Height without feet: 7-1⁄8" (181 mm)
Height with feet: 7-3/4" " (197 mm)
Depth: 20" (508 mm)
Depth with cables: 21-1⁄2" (546 mm)

Net Weight
73 lb. (33.1 kg)

Shipping Weight
90 lb. (40.8 kg)

Power Requirement
Standby: 1 Watt
Idle (no music playing): 225 Watts
Typical listening levels: 400 Watts
Maximum: 1500 Watts