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Com-Tech 200/400/800/1600 Power Amplifiers
®
Commercial
Audio
LL 32521C
®
Fire Protective
Signaling
S5206
®
Commercial
Audio
E106377
120 VAC
North
American
Units:
Approved for
THX Theatre
Systems
(CT-400 & 800)
6 Specifications
The following specifications apply to all models in Dual mode
with 8 ohm loads and an input sensitivity of 26 dB unless
otherwise specified. In Fire Protective Signaling Applica-
tions, the specifications in Section 9 supersede several of
the specifications that follow.
Standard 1 kHz Power: This term refers to maximum average
power in watts at 1 kHz with 0.1% THD.
Full Bandwidth Power: This term refers to maximum average
power in watts from 20 Hz to 20 kHz with 0.1% THD.
120 VAC, 60 Hz Units: These North American units have
dedicated transformers for 120 VAC, 60 Hz power mains.
100/120 VAC Units: These units have two-tap transformers
that accept a 50 or 60 Hz AC line, and can be configured for
100 or 120 VAC mains.
220/240 VAC Units: These units have two-tap transformers
that accept a 50 or 60 Hz AC line, and can be configured for
220 or 240 VAC mains.
Performance
Frequency Response: ±0.1 dB from 20 Hz to 20 kHz at
1 watt (see Figure 6.9).
Phase Response: ±10 degrees from 10 Hz to 20 kHz
at 1 watt (see Figure 6.12).
Hum and Noise: A-weighted, 105 dB below full band-
width power; No weighting, 100 dB below full band-
width power.
Total Harmonic Distortion (THD): Less than 0.05% at
full bandwidth power from 20 Hz to 1 kHz increasing
linearly to less than 0.1% at 20 kHz.
Intermodulation Distortion (IMD): (60 Hz and 7 kHz
4:1) Less than 0.05% from less than 166 milliwatts to
full bandwidth power.
Damping Factor: Greater than 1000 from 10 Hz to
400 Hz (see Figure 6.10).
Crosstalk: See Figure 6.13.
Common Mode Rejection Ratio (CMRR): Better than
70 dB.
Slew Rate: Greater than 17 volts per microsecond.
Voltage Gain: (At the maximum level setting) 20:1 ±3%
or 26 dB ±0.25 dB. 90:1 ±12% or 39 dB ±1 dB with the
input sensitivity set to 0.775 volts for 70 volt output. The
following voltage gain specifications are for units with
the input sensitivity set to 0.775 volts for 8/4 ohm output:
Com-Tech 200
: 38:1 ±12% or 32 dB ±1 dB.
Com-Tech 400
: 55:1 ±12% or 35 dB ±1 dB.
Com-Tech 800
: 64:1 ±12% or 36 dB ±1 dB.
Com-Tech 1600
: 85:1 ±12% or 39 dB ±1 dB.
Power
Output Power:
The following are guaranteed minimums
for standard 1 kHz power from 120 VAC, 60 Hz North
American units. For more information or specs on inter-
national units, see the power matrices that follow.
Com-Tech 200
Dual mode (with both channels driven):
150 watts into 4 ohms.
110 watts into 8 ohms.
110 watts with 70 volt output.
Bridge-Mono mode:
300 watts into 8 ohms.
220 watts into 16 ohms.
205 watts in 70 volt mode (140 volt output).
Parallel-Mono mode:
295 watts into 2 ohms.
215 watts into 4 ohms.
210 watts with 70 volt output.
Com-Tech 400
Dual mode (with both channels driven):
240 watts into 4 ohms.
220 watts into 8 ohms.
225 watts with 70 volt output.
Bridge-Mono mode:
475 watts into 8 ohms.
450 watts into 16 ohms.
455 watts in 70 volt mode (140 volt output).
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