Crown MT-1200 User Manual download pdf (Page 2)

Crown International

1718 W. Mishawaka Rd.

Elkhart, IN 46517-9439

TEL: 574-294-8200

FAX: 574-294-8FAX

www.crownaudio.com

Speciﬁ cations subject to change without prior notice. Latest

information available at www.crownaudio.com.

Grounded Bridge is a trademark and Crown, Crown Audio,

ODEP and Micro-Tech are registered trademarks of Crown

International. Other trademarks are the property of their

respective owners. Printed in U.S.A.

, Inc.

7/05 136733-1B

Crown’s Three-Year, No-Fault, Fully Transferable Warranty

Crown offers a Three-Year, No-Fault, Fully Transferable Warranty for every new Crown ampli-

ﬁ er—an unsurpassed industry standard. With this unprecedented No-Fault protection, your new

Crown ampliﬁ er is warranted to meet or exceed original speciﬁ cations for the ﬁ rst three years of

ownership. During this time, if your ampliﬁ er fails, or does not perform to original speciﬁ cations,

it will be repaired or replaced at our expense. About the only things not covered by this warranty

are those losses normally covered by insurance and those caused by intentional abuse. And the

coverage is transferable, should you sell your ampliﬁ er.

See your authorized Crown dealer for full warranty disclosure and details. For customers outside

of the USA, please contact your authorized Crown distributor for warranty information or call

574-294-8200.

Controls and Connectors

Level: A back panel rotary potentiometer for

each channel used to control the output level.

Power: A front panel rocker switch used to turn

the ampliﬁ er on and off.

Stereo/Mono: A three-position back panel

switch used to select Stereo, Bridge-Mono or

Parallel-Mono mode.

Sensitivity: A three-position switch inside the

back cover plate used to select the input sensi-

tivity for both channels: 0.775 volt or 1.4 volts

for standard 1 kHz power into 8 ohms, or 26

dB gain.

Ground Lift: A two-position back-panel switch

used to isolate the phone jack input grounds

from the AC ground.

Reset: A back-panel pushbutton switch (one

per channel) that resets the circuit breaker.

Indicators

(all located on front panel)

Enable: This amber indicator shows the on/off

status of the low-voltage power supply and

cooling fan.

ODEP: Each channel has an amber front panel

indicator that shows thermal-dynamic energy

reserve. Normally, each ODEP indicator is lit to

show available reserve energy. The indicator

will dim proportionally as the energy reserve

for its channel decreases. In the rare event

that a channel has no reserve, its indicator

will turn off and the ODEP circuitry will limit

the channel’s output drive. They remain off

if the power is turned off, disconnected, or if

the low-voltage power supply fuse blows. A

channel’s ODEP indicator will also remain off if

its high-voltage supply fuse blows (or breaker

opens) or if transformer thermal protection is

activated.

Input/Output

Input Connector: Two balanced 1/4-inch (6.35-

mm) phone jacks in parallel with two XLR

connectors.

Input Impedance: Nominally 20 k ohms, bal-

anced. Nominally 10 k ohms, unbalanced.

Input Sensitivity: Settings include 0.775 volt

and 1.4 volts for standard 1 kHz power, or

26 dB gain.

Output Connectors: Two sets of color-coded

binding posts for banana plugs, spade lugs

or bare wire (European models do not accept

banana plugs).

Output Impedance: Less than 10 milliohms in

series with less than 2 microhenries.

DC Output Offset: (Shorted input) ±10 mil-

livolts.

Output Signal:

Stereo: Unbalanced, two-channel.

Bridge-Mono: Balanced, single-channel.

Channel 1 controls are active; Channel 2

should be turned down.

Parallel-Mono: Unbalanced, single-channel.

Channel 1 controls are active; Channel 2 is

bypassed.

Protection

The Micro-Tech Series ampliﬁ er is protected

against shorted, open or mismatched loads;

overloaded power supplies; excessive tem-

perature, chain destruction phenomena, input

overload damage and high-frequency blowups.

It also protects loudspeakers from input/output

DC and turn-on/turn-off transients.

If unreasonable operating conditions occur,

the patented ODEP circuitry will proportionally

limit the drive level to protect the output stages,

particularly in the case of elevated temperature.

Transformer overheating will result in a tempo-

rary shutdown of the affected channel; when

it has cooled to a safe temperature, the trans-

former will automatically reset itself. Controlled

slew rate voltage ampliﬁ ers prevent RF burn-

outs, and input overload protection is provided

by the input current limit.

Turn On: The four-second turn-on delay pre-

vents dangerous turn-on transients. Turn-on

occurs at zero crossing of the AC waveform, so

power sequencers are rarely needed with mul-

tiple units. Note: To change the turn-on delay

time, contact Crown’s Technical Support Group.

Construction

Steel chassis with durable black ﬁ nish, front

panel Lexan overlay and specially designed

“ﬂ ow-through” ventilation from front to side

panels.

Cooling: Internal heat sinks with forced-air

cooling for rapid, uniform heat dissipation.

Dimensions: EIA Standard 19-inch

(48.3-cm) rack mount width (EIA RS-310-B),

3.5 inches (8.9-cm) high and 16 inches (40.6-

cm) deep behind front mounting surface.

Weight:

Micro-Tech 600: 36 lb, 4 oz (16.5 kg) net.

41, lb 2 oz (18.7 kg) shipping.

Micro-Tech 1200: 41 lb, 1 oz (18.6 kg) net.

45, lb 3 oz (20.5 kg) shipping.

Micro-Tech 2400: 46 lb, 14 oz (21.3 kg) net.

55lb, 12 oz (25.3 kg) shipping.

MT-600

MT-1200

MT-2400

The MT-600 is shown. The MT-2400 is the same but has two reset switches near the power cord.

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