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FIGURE 3 — 7200 Typical Input Connections
Power
AWG
DCR/ft
Loss/ft
(GA)
(W/ft)
(watts/ft)
6
0.00081
0.0126
8
0.00121
0.0189
10
0.00204
0.0318
12
0.00324
0.0506
14
0.00515
0.0804
16
0.00819
0.1278
18
0.01302
0.2031
20
0.02070
0.3226
22
0.03292
0.5122
TABLE 1 — 7200 Power Losses in Two-Wire Speaker Cable
Output Type,
Dual Mode: Unbalanced, each channel
Bridge Mode: Balanced
Output Devices (8 devices),
Pd
: 150 watts
max
Ic: 15 A dc
Vceo: 180 V dc
Tj
: 150 °C
max
Controls and Switches:
Mode switch—rear
Input Level Controls (two)—front
Power switch—front
Front-Panel Indicators:
Power LED
Clip LEDs (two)
Protect LEDs (two)
Connections,
Input:
1
/
-inch phone (two)
4
Female XLR-type connectors (two)
Octal accessory sockets (two)
(powered with ±15 volts dc at 25 mA)
Output:
Five-way binding posts
Power:
1.83 m (6 ft), three-wire, 16 GA power
cord with NEMA 5-15 plug/IEC
Fuse Type:
4-A/250-V (for 120 V ac use)
Power Requirements:
120 V ac, 50/60 Hz, 400 watts
(configurable to 220/240 V ac)
100 V ac, 50/60 Hz model available
Power Consumption/Heat Produced (both
channels operating, dual mode, with 1 kHz
sinewave input signal at stated output
power into 4 ohm loads),
Cable
Cross-Sectional
DCR/meter
area (mm
2
)
(W/m)
13.30
0.00264
8.36
0.00421
5.26
0.00669
3.31
0.01063
2.08
0.01691
1.31
0.02685
0.82
0.04289
0.52
0.06764
0.33
0.10658
Idle:
70 watts/0.238 kBTU/hr
One-Eighth Maximum Midband Power:
400 watts/1.364 kBTU/hr
One-Third Maximum Midband Power:
600 watts/2.047 kBTU/hr
Rated Output Power:
900 watts/3.070 kBTU/hr
Maximum Midband Power:
970 watts/3.309 kBTU/hr
Operating Temperature Range:
Up to 50 °C (122 °F) ambient
Dimensions,
Height: 88.9 mm (3.5 in.)
Width: 482.6 mm (19.0 in.)
Depth: 406.5 mm (16.6 in.)
Color:
Gray and black
Enclosure:
Rack mount chassis
16-GA steel
3
/
-inch 5052 aluminum alloy front panel
16
Shipping Weight:
19.5 kg (43 lb)
Net Weight:
16.8 kg (37 lb)
Supplied Items:
Operating instructions and service manual;
four "U" jumper plugs for octal sockets; one
2-A/250-V fuse for 220/240-V ac use
Optional Plug-In Accessory Modules:
APX 24-dB-per-octave Linkwitz-Riley
crossover, switch selectable on ISO one-
third-octave center frequencies from 50-
10,000 Hz; APX-2 crossover, as APX but
with external nigh-pass output for other
amplifiers; APX-200 dual-channel
equalizer for FR200 speaker system.
FIGURE 4 — 7200 Typical Output Connections
DESCRIPTION
Power
The Electro-Voice 7200 stereo power amplifier
Loss/meter
utilizes proven design concepts to provide an
(watts/m)
ultra-reliable amplifier with virtually unmatched
performance characteristics. It achieves this
0.0412
success without increased complexity or cost,
0.0657
making it a real value.
0.1044
0.1658
Each channel delivers over 125 watts of con-
0.2636
tinuous average power into 8 ohms or over
0.4181
200 watts into 4 ohms over the full audio fre-
0.6665
quency range. In the bridge mode, the amplifier
1.0480
can deliver more than 400 watts into an 8-ohm
1.6434
load at less than 0.10% THD. The maximum
midband output power is 145 watts per channel
into 8 ohms and 230 watts per channel into
4 ohms at less than 1% THD.
Eight output devices are utilized for a total
device power dissipation of 1,200 watts. Be-
cause the large heatsink area allows more than
adequate dissipation, the amplifier is convec-
tion cooled and performs in total silence.
Each channel is independently protected against
excessive output voltage, excessive phase shift,
radio-frequency interference, shorted loads and
overtemperature.
The load is protected against startup and shut-
down transients, DC faults, low ac voltage and
subsonic signals.
A unique current-limiting circuit was designed
specifically for the amplifier. It features a vari-
able current limit which is a function of the
output signal voltage. As a result, the amplifier
can deliver the rated currents into rated loads,
but substantially limits the current into low
impedance or shorted loads (shorted output
terminals). Once the short is removed, how-
ever, the amplifier will resume normal opera-
tion.
The amplifier has "protect" LEDs for each chan-
nel which illuminate if the amplifier goes into
thermal protection or if an internal circuit fault
develops. The amplifier has octal accessory
sockets which will accommodate a variety of
crossover and equalizer modules, simplifying
system hookup and decreasing cost. These
electronic modules are powered from a bipolar
15-volt supply in the amplifier.
The amplifier has a 31-position detented gain
control and separate "clip" and "protect" LEDs
for each channel.
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