Description

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
Specifications
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