รายละเอียดย่อ :
เครื่องขยายเสียง 4 channels, 170 watts/ch at 8Ω, 250 watts/ch at 4Ω, 450 watts/ch at 2Ω
รายละเอียดทั้งหมด :
QSC CX254 เครื่องขยายเสียง 4 channels, 170 watts/ch at 8Ω, 250 watts/ch at
4Ω, 450 watts/ch at 2Ω
FEATURES
- Three models that range in power from 170 watts to 450 watts per channel
- Compact size-all models only 2 RU and 14" deep for reduced rack cost and floor space
- Channels 1&2 and 3&4 bridgeable for maximum flexibility
- Active Inrush Limiting eliminates AC inrush current, removing the need for expensive power sequencers
- HD15 DataPort connector for Q-Sys and QSControl computer control and monitoring
- Custom integrated security cover for tamper-proof installations
- Variable speed fan for low noise
- 1 dB detented gain controls for fast and accurate gain settings
- Detachable Euro style input connectors
- DIP switch control for clip limiters, high pass filters, bridge mono and parallel operation
- Exclusive PowerLight switch-mode power supply technology for high performance and compact size
- Selectable high-pass filters protect speakers and prevent speaker transformer saturation with minimaleffect on program material (33 Hz or 75 Hz on non-V models, 50 Hz or 75 Hz on V models)
- Comprehensive front panel indicators including signal, clip, protect and QSC's exclusive bridge monoand parallel input LEDs
- Barrier strip output connector
- Comprehensive protection circuitry including DC, infrasonic, thermal overload and short circuit protection
- High-performance Class AB+B complementary bipolar output circuitry
- Light weight-all models only 21 pounds (9.5 kg) for easier racking and shipping
- 3-year warranty plus optional 3-year extended service contract
- All CX Series amplifiers meet the European Union's, 2006 RoHS directive to restrict the use of hazardous materials used in electronic devices.
| SPECIFICATIONS |
CX204V |
CX254 |
CX404 |
| |
STEREO MODE (All Channels Driven) |
| 8 ohms 20 Hz-20 kHz 0.05% THD |
- |
170W |
250W |
| 4 ohms 20 Hz-20 kHz 0.05% THD |
- |
250W |
400W* |
| 2 ohms 1 kHz 1% THD |
- |
450W |
not recommended |
| 70V 20 Hz-20 kHz 0.05% THD |
200W |
- |
- |
| 70V 1 kHz 0.05% THD |
220W |
- |
- |
| 70V 1 kHz 1% THD |
300W |
- |
- |
| |
BRIDGED MONO MODE |
| 16 ohms 20 Hz-20 kHz 0.1% THD |
- |
340W |
500W |
| 8 ohms 20 Hz-20 kHz 0.1% THD |
- |
500W |
800W* |
| 4 ohms 1 kHz 1% THD |
- |
900W |
not recommended |
| 140V 20 Hz-20 kHz 0.1% THD |
400W |
- |
- |
| 140V 1 kHz 0.05% THD |
440W |
- |
- |
| 140V 1 kHz 1% THD |
600W |
- |
- |
| Noise, 20Hz-20kHz |
|
| Input Sensitivity |
1.26Vrms |
1.22Vrms |
1.22Vrms |
| Gain (for full-rated output power) |
35 dB @ 70.7V |
29 dB @ 8 ohms |
31 dB @ 8 ohms |
| Input Clipping |
10 Vrms (+22 dBu) |
10 Vrms (+22 dBu) |
10 Vrms (+22 dBu) |
| Output Circuitry |
AB+B |
AB+B |
AB+B |
| Distortion (SMPTE-IM) |
Less than 0.02% |
Less than 0.01% |
Less than 0.01% |
| |
ALL MODELS |
Distortion (Typical)
20 Hz-20 kHz: 10 dB below rated power
1.0 kHz and below: full rated power |
Less than 0.01% THD
Less than 0.01% THD |
| Frequency Response (typical) |
20 Hz-20 kHz, ± 0.2 dB 8 Hz-50 kHz, +0/-3 dB |
| Damping Factor |
Greater than 500 (1 kHz and below)
|
| Input Impedance |
6k ohms unbalanced, 12k ohms balanced
|
| Cooling |
Variable speed fan, rear to front airflow through tunnel heat sink
|
Connectors, each channel
|
Input: 3 position Euro-style detachable barrier block, Ch 1,2,3 & 4
DataPort: HD-15 Connector, Ch 1+2, Ch 3+4
Output: Six-position barrier strip with monitor connections, Ch 1+2, Ch 3+4
|
Amplifier Protection
|
Full short circuit, open circuit, thermal, ultrasonic, & protection. Stable into reactive or mismatched loads.
|
| Load Protection |
On/off muting, DC-fault power supply protection
|
| Indicators |
PARALLEL INPUTS: Red LED
BRIDGED: Yellow LED
PWR-ON: Green LED
|
CLIP/PROT: Red LED (1 per channel)
LEVEL-10 dB: Yellow LED (1 per channel)
LEVEL-20 dB: Yellow LED (1 per channel)
SIGNAL -35 dB: Green LED (1 per channel)
|
Controls
|
Controls Front: AC switch, Ch.1 and Ch.2 gain knobs
Rear: DIP switch for Ch.1 and Ch.2: clip limiter on/off, LF filter on/off,
LF filter freq select 33 Hz or 75 Hz for non-V models; 50 Hz or 75 Hz for V models; inputs parallel or stereo; bridge mode
|
Dimensions
|
19" (48.3 cm) rack mounting, 3.5" (8.9 cm) tall (2 rack spaces),
14" (35.6 cm) deep (from front mounting rails)
|
| Weight |
21 lb (9.5 kg) net, 27 lbs (12.3 kg) Shipping
|
| Power Requirements |
100, 120, 230 Vac, 50-60 Hz
|
|
| CURRENT CONSUMPTION |
|
CX204V |
CX254 |
CX404 |
Idle current
(Multiply currents by 0.5 for 230V units.) |
0.8A |
0.7A |
0.7A |
1/8 Power (Pink Noise)
(typical of program material
at maximum unclipped power) |
8 ohms
4 ohms
2 ohms
70 volts |
-
-
-
8.3A |
5.8A
9.2A
14.3
- |
8.1A
12.4A
not rated
- |
1/3 Power (Pink Noise)
(typical of program material with severe clipping) |
8 ohms
4 ohms
2 ohms
70 volts |
-
-
-
12.7A |
8.8A
14.2
21.7A
- |
12.2A
19.3A
not rated
- |
|
|
