automatically as soon as safe operation is assured. An equally important muting circuit protects the loudspeakers from unexpected damage, by muting the amp during
The front panel presents essential user information and is recessed to prevent damage. The green power indicator serves as a pilot light and individual red clip indicators monitor overall performance of each channel. The AC switch and circuit breaker are front mounted for convenience and quick resetting. Except for the Model 1100, the Gain controls and input programming switches have been placed on the back of the amplifier to protect them from damage, inadvertent adjustment, or tampering. The Gain controls, as well as a pair of headphone jacks, have been placed on the front panel of the Model 1100 to allow easy access in monitoring applications.
The amplifiers use a separate bipolar power supply for each channel, for minimum crosstalk,
In order to interface properly with a variety of
The steel chassis, of the 1200, 1400 and 1700, is a 14 gauge, single piece design with integral rack mounting ears. The 1100 chassis features single piece aluminum extrusions that form the sides of the chassis and feature integral rack mounting ears and heatsinks. The extra strength chassis and rugged mounting of internal parts contributes greatly to QSC’s reputation for reliability by protecting the circuitry from years of road abuse.
All of these points are more fully explained in the following Sections.
1.4 SPECIFICATIONS
1100 | 1200 | 1400 | 1700 |
OUTPUT POWER (per channel) Both Channels Driven
8 ohms,
4 ohms,
8 ohms,
DYNAMIC HEADROOM dB
8ohms
4ohms
DISTORTION, THD @ 8 ohms
FREQUENCY RESPONSE
DAMPING FACTOR @ 8 ohms
NOISE
VOLTAGE GAIN, dB
SENSITIVITY, V RMS
(for rated power,
INPUT IMPEDANCE
CROSSTALK
CONTROLS
INDICATORS
COOLING 4
50w | 100w | 200w | 325w |
70w | 150w | 300w | 500w |
140w | 300w | 600w | 1000w |
2.0 | 2.0 | 2.0 | 1.9 |
2.3 | 2.5 | 2.5 | 2.9 |
Less than 0.1%, 0.01% typical
Less than 0.025%
Greater than 200
100 dB below rated power
26 | 29 | 32 | 34 |
1.0 | 1.0 | 1.0 | 1.0 |
10K unbalanced inverting
20K balanced or unbalanced non inverting
AC Switch, Circuit Breaker, Gain Knobs, Input Programming DIP Switches, and Bridging Switch
Power: Green LED | Clip: Red LED |
| ||
Convection | Convection | 2 speed fan | 2 speed fan |