14
EN
TD-000077-00-K
Specifications
4-Channel Low-Impedance Models
CX254 CX404
Output Power (Watts)
20 - 20k Hz, 0.03% THD, 8 Ohms/Ch. 170 250
20 - 20k Hz, 0.05% THD, 4 Ohms/Ch. 250
1k Hz, 1.0% THD (EIA), 8 Ohms/Ch.
1k Hz, 1.0% THD (EIA), 4 Ohms/Ch. 450
1k Hz, 1.0% THD (EIA), 2 Ohms/Ch. 450
Bridge Mono, 20 - 20k Hz, 0.1% THD, 16 Ohms 340 500
Bridge Mono, 20 - 20k Hz, 0.1% THD, 8 Ohms 500
Bridge Mono, 1k Hz, 1.0% THD, 8 Ohms 900
Bridge Mono, 1k Hz, 1.0% THD, 4 Ohms 900
Distortion, SMPTE-IM <0.01% <0.01%
Frequency Response 20 - 20k Hz, ±0.2dB at 10dB below rated output power, all models (-3dB points: 8 Hz and 100 kHz)
Signal To Noise, Unweighted, 20 - 20K Hz -106 dB -106 dB
Voltage Gain 29.0x (29dB) 36.5x (31dB)
Input Sensitivity, Vrms
For Rated Power Into 8 Ohms
For Rated Power Into 4 Ohms
1.28 (+4.4dBu)
1.08 (+2.9dBu)
1.22 (+3.9dBu)
EIA: 1.16 (+3.5dBu)
Output Circuit Type AB AB
Input Impedance 6k ohms unbalanced, 12k ohms balanced, all models
Dynamic Headroom 2 dB at 4 Ohms, all models
Damping Factor >500 at 8 Ohms, all models
Amplifier Protection Short circuit, open circuit, thermal, ultrasonic and RF protection. Stable into reactive or mismatched loads
Cooling Continuously variable speed fan; back-to-front air flow through heat sink tunnel
Controls
Front
Back
AC POWER switch, gain controls (1 control per channel, 21 detents)
10-position DIP switch (1 per channel pair) with Clip Limiter (1 per Ch.), LF Filter on/off (1 per Ch.) LF filter select: 33 or
50 Hz (1 per Ch.), Stereo/Parallel/Bridge mode selection switches (1 set per Ch. pair)
Led Indicators POWER (green, 1 each), SIGNAL, -10dB, -20dB (green, 1 each per Ch.), CLIP (red, 1 each per channel), BRDG and PAR
(yellow, 1 each per Ch. pair)
Connectors
Input
Output
Other
3-pin terminal block ("euro" or "Phoenix" type)
barrier strip connectors with protective shroud, one barrier trip per Ch. pair
two QSC DataPort connectors (supports full “V1”feature set), one DataPort per Ch. pair
Load Protection Turn-on/turnoff muting, AC coupling (DC fault blocking), Clip limiting.
Power Requirements Refer to rear panel serial number label. Configured at factory for 100, 120 or 220-240 VAC, 50- 60 Hz.
Dimensions 19.0" (48.3 cm) W, 3.5" (8.9 cm) H, 14" (35.6 cm) D (from front mounting rails, including rear support ears)
Weight 21 pounds (9.5 kg) net; 27 pounds (12.3 kg) shipping