Листовка для Crown ma-12000i
Crown International
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8200
FAX: 574-294-8FAX
Customer Service: 800-342-6939
or 574-294-8200.
www.crownaudio.com
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8200
FAX: 574-294-8FAX
Customer Service: 800-342-6939
or 574-294-8200.
www.crownaudio.com
4/08 140535-2
Specifi cations
Performance
Frequency Response (at 1 watt, 20 Hz - 20 kHz
into 8 ohms): ±0.25 dB.
into 8 ohms): ±0.25 dB.
Signal to Noise Ratio (below rated full-bandwidth
power, A-weighted): > 110 dB.
power, A-weighted): > 110 dB.
Total Harmonic Distortion (THD) (at 2 watts into 8
ohms): < 0.1%.
ohms): < 0.1%.
Total Harmonic Distortion (THD) Plus Noise (at
full rated power): < 0.35%, 20 Hz to 20 kHz.
full rated power): < 0.35%, 20 Hz to 20 kHz.
Intermodulation Distortion (IMD) (60 Hz and 7
kHz at 4:1, from full rated output to –30 dB):
< 0.35%.
kHz at 4:1, from full rated output to –30 dB):
< 0.35%.
Damping Factor (20 Hz to 100 Hz at 8 ohms):
> 5000.
> 5000.
Crosstalk (below rated power, 20 Hz to 1 kHz):
> 80 dB.
> 80 dB.
Common Mode Rejection (CMR) (20 Hz to 1
kHz): 55 dB, typically >70 dB.
kHz): 55 dB, typically >70 dB.
DC Output Offset (shorted input): < ± 3 mV.
Input Impedance (nominal): 10 kilohms balanced,
5 kilohms unbalanced.
5 kilohms unbalanced.
Maximum Input Level: +20 dBu typical.
Network: Onboard HiQnet™, compatible with
standard 100 Mb Ethercom hardware.
standard 100 Mb Ethercom hardware.
Load Impedance: (Note: Safe with all types of
loads)
Stereo: 1/2/4/8/16 ohms.
Bridge Mono: 2/4/8 ohms.
loads)
Stereo: 1/2/4/8/16 ohms.
Bridge Mono: 2/4/8 ohms.
Input Sensitivity (referenced to 8 ohm rated
output): 1.4V, 32 dB gain, and 26 dB gain.
output): 1.4V, 32 dB gain, and 26 dB gain.
Voltage Gain (referenced to 8 ohm rated output):
MA-5000i: 37.1 dB to 22.2 dB
MA-9000i: 37.9 dB to 23.0 dB
MA-12000i: 39.3 dB to 24.5 dB
MA-5000i: 37.1 dB to 22.2 dB
MA-9000i: 37.9 dB to 23.0 dB
MA-12000i: 39.3 dB to 24.5 dB
Required AC Mains: Universal AC input, 100-
240VAC, 50/60 Hz (±10%). Maximum AC mains
voltage 264VAC.
240VAC, 50/60 Hz (±10%). Maximum AC mains
voltage 264VAC.
AC Line Connector: Five cordsets supplied with
amplifi er (USA, UK, European, Australia, India).
amplifi er (USA, UK, European, Australia, India).
Front Panel Controls and Indicators
Bridge Mode Indicator: Amber LED illuminates
when the amplifi er is set to Bridge-Mono mode.
when the amplifi er is set to Bridge-Mono mode.
Ready Indicator: Green LED, one per channel.
On (bright): Ready.
On (dim): Onset of compression.
Off: Thermal failure.
On (bright): Ready.
On (dim): Onset of compression.
Off: Thermal failure.
Signal Indicators: One green LED per channel.
Solid green: Input signal is above –40 dBu.
Bright green: Channel’s output signal has reached
the onset of audible clipping.
Solid green: Input signal is above –40 dBu.
Bright green: Channel’s output signal has reached
the onset of audible clipping.
Power Indicator: Blue LED indicates amplifi er has
been turned on and AC power is available. The
been turned on and AC power is available. The
LED will fl ash when the AC line voltage is 10%
above or below the nominal rated value.
above or below the nominal rated value.
Data Indicator: Yellow LED on front panel indi-
cates network data activity. Data indicator fl ashes
only when the amplifi er is polled for data, or is
polled to see whether it is online
cates network data activity. Data indicator fl ashes
only when the amplifi er is polled for data, or is
polled to see whether it is online
Power Switch: Push-on/push-off switch with
built-in green AC mains present indicator.
built-in green AC mains present indicator.
Volume Control: Precision detented attenuator
with 31 steps, press-and-hold mute function.
with 31 steps, press-and-hold mute function.
Volume Control LED Ring: A ring of green LEDs
around each volume control show the position of
the control. Entire ring fl ashes when channel is
muted. Can be converted to be a level meter.
around each volume control show the position of
the control. Entire ring fl ashes when channel is
muted. Can be converted to be a level meter.
Back Panel Controls, Indicators and Con-
nectors
nectors
Power Cord Connector: Detachable 20 amp IEC
inlet. Cord locks with supplied cord retention clip.
Voltage range is indicated above IEC inlet.
inlet. Cord locks with supplied cord retention clip.
Voltage range is indicated above IEC inlet.
Reset Switch/Circuit Breaker: If the current draw
of the amplifi er exceeds safe limits, this breaker
automatically disconnects the power supply
from the AC mains. The switch resets the circuit
breaker.
of the amplifi er exceeds safe limits, this breaker
automatically disconnects the power supply
from the AC mains. The switch resets the circuit
breaker.
Output Connectors: Two high-current, 50A Neu-
trik
trik
®
Speakon
®
NL4MLP (mates with NL4FC or
NL4), one per channel. Ch 1 Speakon
®
is wired
with Ch 1 and Ch 2 outputs for use with single
4-conductor cable. Two pairs of high-current,
60A color-coded 5-way binding posts (for banana
plugs, spade lugs or bare wire).
4-conductor cable. Two pairs of high-current,
60A color-coded 5-way binding posts (for banana
plugs, spade lugs or bare wire).
Analog Input Connectors: A 3-pin female XLR
connector for each channel.
connector for each channel.
Analog Loop Thru Connectors: Two male XLR
passive analog loop through.
passive analog loop through.
Mode Switch/Indicator: Sets amplifi er to Stereo,
Bridge, or Input Y mode. OFF=Stereo, YEL=Bridge,
GRN=Y.
Bridge, or Input Y mode. OFF=Stereo, YEL=Bridge,
GRN=Y.
Network Connector: This Neutrik
®
Ethercon con-
nector accepts an RJ-45 connector for HiQnet™
networking. Next to the connector is a yellow
LINK ACT indicator that shows network activity,
and a green 100Mb indicator that shows a 100Mb
network connection.
networking. Next to the connector is a yellow
LINK ACT indicator that shows network activity,
and a green 100Mb indicator that shows a 100Mb
network connection.
Data Indicator: Yellow LED on back panel indi-
cates network data activity. Data indicator fl ashes
only when the amplifi er is polled for data, or is
polled to see whether it is online.
cates network data activity. Data indicator fl ashes
only when the amplifi er is polled for data, or is
polled to see whether it is online.
Preset Indicator: Green/yellow LED fl ashes to
signal the number of the current preset. LED is
green if current preset is active, or is yellow if cur-
rent preset is modifi ed.
signal the number of the current preset. LED is
green if current preset is active, or is yellow if cur-
rent preset is modifi ed.
Input Sensitivity Switch: Three-position switch
providing 1.4V, 32 dB, and 26 dB settings for both
channels.
providing 1.4V, 32 dB, and 26 dB settings for both
channels.
Firmware/Software
Firmware can be updated at www.crownaudio.com
> Support > Downloads.
> Support > Downloads.
Software features: User Presets, Clip Event
Monitor, Input Signal Level Monitor, Output Signal
Level Monitor, Thermal Headroom Level Monitor,
Power/Standby Control, Signal Mute, Polarity
Inverter, Input Signal Fader, Dynamic Gain Moni-
tors (Ghost Faders), Amplifi er Information, User
and Channel Labels, Amplifi er Mode, Amplifi er
Output Mode, Line Voltage Monitor, Error Report-
ing, Auto Standby, Input Signal Compressor/Lim-
iter, Peak Voltage Limiter, Average Power Limiter,
Clip Eliminator, Thermal Limiter, Limiter Tie, Load
Supervision.
Monitor, Input Signal Level Monitor, Output Signal
Level Monitor, Thermal Headroom Level Monitor,
Power/Standby Control, Signal Mute, Polarity
Inverter, Input Signal Fader, Dynamic Gain Moni-
tors (Ghost Faders), Amplifi er Information, User
and Channel Labels, Amplifi er Mode, Amplifi er
Output Mode, Line Voltage Monitor, Error Report-
ing, Auto Standby, Input Signal Compressor/Lim-
iter, Peak Voltage Limiter, Average Power Limiter,
Clip Eliminator, Thermal Limiter, Limiter Tie, Load
Supervision.
Construction
Cooling: Dual-zone, microprocessor controlled,
continuously variable speed fans, front-to-back
airfl ow.
continuously variable speed fans, front-to-back
airfl ow.
Front Panel: Cast aluminum with integrated
handles.
handles.
Dimensions: 19 in. (48.3 cm) W x 3.5 in. (8.9 cm)
H x 16.2 in. (41.1 cm) D.
H x 16.2 in. (41.1 cm) D.
Weight: 28 lbs (12.7 kg) net, 36 lbs (16.3 kg)
shipping.
shipping.
Protection: Amplifi er is protected against reactive
loads, faults and shorts. If one channel experi-
ences a catastrophic failure, the entire amplifi er
will shut down.
loads, faults and shorts. If one channel experi-
ences a catastrophic failure, the entire amplifi er
will shut down.
Included Accessories: Rear rack ears, rack
screws, operation manual, power cords, foam air
fi lter.
screws, operation manual, power cords, foam air
fi lter.
Note: All measurements apply to units in Stereo mode
with 8-ohm loads and rated input sensitivity unless oth-
erwise specified.
with 8-ohm loads and rated input sensitivity unless oth-
erwise specified.
Specifi cations subject to change without prior notice. Latest
information available at www.crownaudio.com.
information available at www.crownaudio.com.
Crown, Macro-Tech and Crown Audio are registered
trademarks; HiQnet is a trademark of Crown International.
Other trademarks are the property of their respective owners.
Printed in U.S.A.
trademarks; HiQnet is a trademark of Crown International.
Other trademarks are the property of their respective owners.
Printed in U.S.A.
© 2008 Crown Audio
®
Inc
Macro-Tech
®
i Series