MA-3600VZ Service Manual
Specifi cations 2-2
130366-1 Rev. A
©2000 Crown International, Inc.
2.7 Construction
Durable black powder coated steel chassis and aluminum
front panel with Lexan overlay; specially designed “fl ow-
through” ventilation from front to side panels.
Cooling: Forced-air with custom heat diffusers and patented
circuitry to promote uniform dissipation.
Dimensions: 19 inch (48.3 cm) standard rack mount (EIA
Std. RS-310-B), 3.5 inch (8.9 cm) height, 16 inch (40.6 cm)
depth behind mounting surface and 2.5 inches (6.4 cm) in
front of mounting surface (see Figure 2.2).
Approximate Weight: Center of gravity is 6 inches (15.2 cm)
behind the front mounting surface.
120 VAC, 60 Hz Units:
Net weight 55 lbs, 1.5 ounces (25.0 kg); shipping weight
63 lbs, 10 ounces (28.9 kg).
100 VAC International Units:
Net weight 54 lbs, 5 ounces (24.7 kg); shipping weight 63
lbs, 0.5 ounces (28.6 kg).
120 VAC International Units:
Net weight 55 lbs, 1.5 ounces (25.0 kg); shipping weight
63 lbs, 10 ounces (28.9 kg).
230 VAC International Units:
Net weight 53 lbs, 6 ounces (24.2 kg); shipping weight 61
lbs, 15 ounces (28.1 kg).
ence. In the unlikely event the output waveform differs from
that of the input by 0.05% or more, they fl ash brightly to indi-
cate distortion. As sensitive distortion indicators they provide
proof of performance. Note: It is normal for the Channel 2 IOC
indicator to remain on in Parallel-Mono mode.
ODEP: Each channel has a multifunction LED (light emitting
diode) indicator that shows the channel’s energy reserve
status. Normally, the LEDs are brightly lit to show that reserve
energy is available. An indicator will dim proportionally as the
energy reserve for its channel decreases. In the rare event
that a channel has no reserve energy, the indicator turns
off and ODEP proportionally limits the channel’s output drive
level so the amplifi er can continue safe operation even when
conditions are severe.
2.5 Input/Output
Input Connector: Balanced ¼-inch phone jacks on chassis
and internal PIP connector. (Balanced 3-pin XLR connectors
are provided on the P.I.P.-FX which is a standard feature.)
Input Impedance: Nominally 20 k ohms, balanced. Nominally
10 K ohms, unbalanced.
Input Sensitivity: Switchable between 0.775 V (unbalanced)
for rated output or a fi xed voltage gain of 26 dB.
Output Connector: Color-coded dual binding posts (banana
jacks).
Output Impedance: Less than 10 milliohms in series with
less than 2 microhenries.
DC Output Offset: (Shorted input) ±10 millivolts.
Output Signal;
Stereo: Unbalanced, two-channel,
Bridge-Mono: Balanced, single-channel. Channel 1 controls
are active; Channel 2 controls are inactive and not removed
from operation,
Parallel-Mono: Unbalanced, single-channel. Channel 1
controls are active; Channel 2 controls are inactive but
notremoved from operation.
2.6 Protection
Macro-Tech amplifi ers are protected against shorted, open
or mismatched loads; overloaded power supplies; excessive
temperature, chain destruction phenomena, input overload
damage and high-frequency blow-ups. They also protect
loudspeakers from input/output DC and turn-on/turn-off tran-
sients.
If unreasonable operating conditions occur, the patented
ODEP circuitry proportionally limits the drive level to protect
the output devices, particularly in the case of elevated tem-
perature. Transformer overheating results in a temporary
shutdown of the offending channel. When it has cooled to a
safe temperature, the transformer automatically resets itself.
Controlled slew rate voltage amplifi ers protect against RF
burnouts, and input overload protection is provided by cur-
rent-limiting resistance at the input.
Turn On: The four second turn-on delay prevents dangerous
turn-on transients. Turn-on occurs at zero crossing of the
AC waveform, so power sequencers are rarely needed with
multiple units. Note: The turn-on delay time may be changed.
Contact Crown’s Technical Support Group for details.
Circuit Breaker: Circuit breaker current ratings vary based
on the AC operating power.
Figure 2.1 Typical Crosstalk
Figure 2.2 Dimensions
100 1 K 10 K 20 K
FREQUENCY (Hz)
dB
TEF
®
To Next Page
Loading...
Need help?
General