Crown CTS 600 - Manual (Page 57)

RECORDING & BROADCAST
• 57
www.crownaudio.com
T he D-45 and D-75A are long-term standards. They are perfect for moderate power applications
such as recording or broadcast studio near-field monitoring, video suite audio monitoring, a
recording/broadcast headphone amp or a small paging system. Convection cooled, the highly reli-
able D Series is protected against shorted, open, mismatched or low-impedance loads.
SPECIFICATIONS
Performance
Frequency Response (at 1 watt) 20 Hz to 20 kHz:
±0.1 dB.
Phase Response (from 20 Hz to 20 kHz at 1 watt):
+10 to –15 degrees.
Signal-to-Noise Ratio below rated power (20 Hz
- 20 kHz): 106 dB.
Total Harmonic Distortion (THD) at full bandwidth
power: 0.05% from 20 Hz to 20 kHz.
Intermodulation Distortion (IMD) (60 Hz and
7 kHz at 4:1)
from 0.25 watts to full bandwidth power: < 0.01%.
from 0.01 to 0.25 watts: < 0.05%.
Damping Factor, from DC to 400 Hz: > 400.
Crosstalk (below rated power): 100 Hz to 1 kHz,
>100 dB.
Input Impedance (nominally balanced, nominally
unbalanced): 20 k ohms, 10 k ohms.
Input Sensitivity: Configurable for 26 dB gain or
0.775-volt sensitivity.
Load Impedance: Safe with all types of loads.
Rated for 4 to 16 ohms in Dual mode, 8 to 16
ohms in Bridge-Mono mode.
AC Line Voltage and Frequency Configurations
Available (±10%): 100, 120, 220 and 240 VAC,
50 to 400 Hz for international units (depend-
ing on the transformer configuration). North
American 120 VAC, 60 Hz units are not convert-
ible and can only be used at the specified voltage
and frequency. All units draw 15 watts or less
when idle.
Front Panel Controls and Indicators
Power: A two-position rotary on/off switch.
Level: An independent detented front-panel level
control for each channel.
Dual/Mono: A jumper located inside the amplifier
selects between dual and mono operation.
Signal Presence: The green front-panel indicator
for each channel flashes synchronously with the
channel’s output signal to indicate its presence.
Input/Output Comparator: The red Input/Output
Comparator (IOC) indicator for each channel flash-
es if any type of distortion reaches 0.05%.
Back Panel Connectors
Input Connectors: A balanced 3-pin female Neutrik
combination XLR and 1/4-inch phone connector for
each channel.
Output Connectors: Barrier block terminals and
stereo headphone jack. The headphone output is
unpadded, and in parallel with the main amplifier
outputs.
Protection
Input: The inputs have series resistance that
provides input overload protection. Controlled
slew rate voltage amplifiers protect against radio
frequencies. The AC line is fused to protect against
excessive current draw.
Output: Instantaneous limiting protection for short
circuits, open circuits and mismatched loads.
Turn-On: Minimum thumps. Power-up is instanta-
neous with no program delay.
Construction
Durable black finish on aluminum front panel
with gray suede Lexan insert. Aluminum chassis
provides maximum heat conduction and mini-
mum weight.
Cooling
The amplifier is totally convection cooled. The
entire aluminum chassis acts as a conductor to
dissipate heat. The covers and front-panel extru-
sion also act as heat sinks. Much of the unit’s heat
is conducted through the extruded front panel. This
design is used so the front panel contact with the
equipment rack will also dissipate heat.
Dimensions
EIA Standard 19-inch (48.3-cm) rack mount width
(EIA RS-310-B), 1.75-inch (4.5-cm) height and 8.5-
inch (21.6-cm) depth behind the mounting surface,
and a 0.625-inch (1.6-cm) protrusion in front of the
mounting surface.
Weight
Net Weight
D-45: 8 lb 11 oz (3.9 kg).
D-75A: 9 lb 7 oz (4.3 kg).
Shipping Weight
D-45: 10 lb 9 oz (4.8 kg).
D-75A: 11 lb 4 oz (5.1 kg).
Regulatory Certifications
Other Applications
Note: All measurements apply to units in Dual mode
with both channels driven into 8-ohm loads and an
input sensitivity of 26 dB gain unless otherwise speci-
fied.