Electro voice 7300 a brochure

Page 2

Damping Factor, Dual mode. 8 Ohms.
20 ~1 .000 Hz:
>200
20.000 HZ:
>75
Crosstalk (reference 1 kHz. 0 dBr -
rated output power into 8 ohms, single
channel operating):
<75 dBr
Noise (below rated output power, A-welght-
ing Iilter. 8 Ohm dual mode, 50/60 Hz ac line:
>100 dB
Amplifier Protectlon:
shorted output terminals
Over temperature,
HF interference
Load Protection:
Startuplshutdown transients,
dc faultsr
lnfrasonlc signals
Cooling,
Heatsink:
Thermally equalized 3/1 6-in.
black anodized aluminum
Fan:
Thermostatically controlled
dual speed, approximately 50 CFM
at low speed and 100
CFM at high speed;
ball bearing Ian has
minimum Iile rating of
50000 hours at 25° C
ambient temperature
Output Topology:
True complementary
symmetry with grounded
collectors (no mica insulators
means better heat transfer)
Output Type,
Dual Mode: Unbalanced. each channel
Bridge Mode: Balanced
Output Devices:
Total number: 15 dSVICBS
Pdmax rating: 250 watts

Vceo: 250 volts DC
lo: 16 amps DC
Timex: 200° C
Controls and Switches:
Rear: Mode swttch
Front: Two input level controls; power
switch
From-Panel Indicators:
Power LED
Clip LEDs (two)

Protect LED's (two)
Connections,
Input:
VA-in. phone jacks (two),
Female XLFMype connectors (two)
Octal accessory sockets (two),
powered with 115 volts DC at

25 mA
Output:
5«way binding posts (two)
Power:

3-terminal [EC ac line receptacle
Power Requirements:
120 V ac, 50/60 Hz. 1000 watts
(configurable to 240 V ac)

100-V. SOISO~H2 model available
Minimum ac Operating Voltage (at reduced
power ouput, 120~V nominal line):

90 volts
Power Consumption/Heat Produced:

(both channels operating in dual mode
with 1 kHz input slgnal at stated output
power Into 4 Ohm loads)

Idle:

72 wattsI0.245 kBTU/h
t/Bth max midband power:

720 watts/2.100 kBTU/h
1/3rd max midband power:

1,068 watts/2.702 kBTU/h

Rated output power:

1,464 watts/2,938 kBTU/h

Max midband power:

1.580 watts/2.873 kBTU/h
Maximum Ambient Operating Temperature:
60° C (140 F)
Dimensions Overall'

Height: 13.3 cm (5:25 in.)

Width: 48.3 cm (19 in.)

Depth (behind rack cars): 33 cm (13 in.)

Shipping Weight:
19.1 kg (42 lb)
Net Weight:
15.5 kg (34 lb)
Color:
Black
Enclosure:
16-GA steel rack-mount chassis
3/1 S-m. 5052 aluminum alloy lront panel
Supplied Items:

Operating instructions and
service manual

Four U' Jumper plugs for octal sockets

One detachable power cord

One 5-A1250-V fuse for 220/240-V use

Option-I Plug-In Accessory Modules:

APX 24-dB-per-octave Linkwitz-Riley
crossover, switch selectable on ISO
1/3-octave center frequencies form
5040.000 Hz

APXZ crossover, as APX but with
external high amplifiers

APX-200 dual-channel equalizer for FFiZOU
and $200 speaker systems

DESCRIPTION

The EV 7300A utilizes proven design
concepts in ooniunction with a new protection
circuit to provide the musician an ultra-
reliable ampliliar With unmatched partorm-
ance characteristics. lt achieves this without
increased complextty or cost, making it a real
value.

Each channel delivers 250 watts of continu.
ous average power at 1 kHz into 8 ohms, or
400 watts into 4 ohms. In the bridge mode,
the amplifier can deliver more than 800 watts
at 5 ohms.

Sixteen ZED-watt. 250-volt metal output tranA
sisters are utilited tor a total device power
dissipation ol 4.000 watts. A very quiet dual-
speed fan is incorporated as an added
reliability measure for the most demanding
conditions. The massive 3/1 6-inch heatsinks
specially engineered to minimize thermal
gradients. meaning that all of the output
devices will operate at appraiiimately the
same temperature. As a result, the amplifier
runs cooler than most. enabling it to operate
under the most adverse conditions without
failure.

Each channel is independently protected

against...
I Over temperature
I Excessive output voltage
, Excessive phase shift
I Radio-frequency interference
0 shorted loads

The load is also protected from startuplshut-
down transients, inlrascnic signals, low ac
line voltage and dc.

The proprietary Output Z protection circuit
guards against premature current limiting
and tlyback pulses and assures the amplifier
is stable With any load regardless of its reac-
tance.

The 7300A has electronically balanced
inputs (both XLR and A-inch TRS) and un-
balanced l/rinch inputs. lt also has octal
accessory sockets for Electra-Voice
modules. The output connectors are live-way
binding posts. The transformer allows
operation at 120 V ac and is configurable to
220/240 V ac. 50/60 Hz. A dedicated 100-V-
ac model is available. The power cable is
removable and utilizes an ISO connector.

Typical performance characteristics are
shown in Figures XX to W and each
amplifier ls measured for power and
distortion before shipment. The EV 7300A is
usable in any situation that demands high
power levels and superior.sonic perform-
ance.

ARCHITECTS' AND ENGINEEHS
SPECIFICATIONS

The power amplifier shall be a dual-channel
model ol solid~state design employing true
complementary-symmetry output circuin
with grounded collectors and capable of
operating from a 120/240-volts-ac. SOIGO-Hz
line. The amplifier shall contain sensing
circuitry to provide protection against over
temperature. shorted output terminals. and
radio lrequency interference. The load shall
be protected against infrasonic signals.
stamp/shutdown transients. and dc Iaultst

0n the rear panel shall be a two-position
mode switch for selecting between the dual-
channel mode or the bridged monophonic
mode. Input connections for each channel
shall include a powered octal accessory
socket for use with optional plug-in accessory
modules. a INIEEAPIH female XLR connector
and a /.-in. TRS connector. Output terminals
shall be binding posts.

Front panel indicators shall include an illumi-
nated power on/off indicator, individually illu-
minating clipping (CLIP) indicators, and in-
dividually illuminated protection-circuit-
actlvetlon (PROTECT) indicators. The front
panel controls shall include two detented
rotary potentiometers and the power on/off
smtch.

The power amplifier shall meet the Iollowing
performance criteria. Maximum input voltage:
7.75 V rms. Input sensitivity for rated output
power into 4 ohms: 0.784 V rms. Hated
power: 300 watts per channel into 4 ohms
from 20 Hz to 20 kHz at less than 0.05%