Crown-audio MT-2400 User Manual download pdf

Crown International

1718 W. Mishawaka Rd.

Elkhart, IN 46517-9439

TEL: 574-294-8200

FAX: 574-294-8FAX

www.crownaudio.com

MT 2400

04/05 138312-1

Speciﬁcations subject to change without prior notice. Latest

information available at www.crownaudio.com.

Crown and Crown Audio are registered trademarks of Crown

International, Inc. Printed in U.S.A.

, Inc.

Architectural & Engineering Speciﬁcations

M I C R O T E C H S E R I E S

Micro-Tech 2400 (120 V, 60 Hz models)

The Crown

Micro-Tech 2400 power ampliﬁer shall be a solid-state two-

channel model employing multi-mode (AB+B) grounded bridge(TM) output

circuitry.

The outputs shall be switchable as stereo, bridged-mono or parallel-mono

modes of operation. The bridged-mono mode shall bridge the outputs to

provide increased output voltage. The parallel-mono mode shall parallel the

outputs to provide increased output current.

The output impedance of each channel shall be less than 10 milliohms in

series with less than 2 microhenries in stereo mode.

The ampliﬁer shall contain protection circuitry which limits the drive level

placed on the output devices before their SOA (Safe Operating Area) is

exceeded. This protection circuitry shall calculate the instantaneous volt-

age across and current through the output devices while factoring in their

simulated junction temperatures to predict how close they are to their

operating limits. This protection will be called “ODEP.”

The ampliﬁer shall contain controlled slew-rate voltage circuitry to protect

it against radio frequency interference burnouts. It shall also be protected

from current overload at its output stage. The slew rate of the ampliﬁer

shall be greater than 13 volts per microsecond in stereo mode.

The ampliﬁer shall temporarily go into a stand-by mode if its power trans-

former becomes excessively hot and shall automatically resume normal

operation once it has cooled to a safe operating temperature.

Front-panel controls shall include an enable on/off switch.

Rear-mounted controls shall include a ground lift switch to isolate the

signal ground from the chassis ground, a switch which selects between

stereo, bridged-mono and parallel-mono modes of operation, a gain

control for each channel, and two push-button reset switches to reset the

circuit breakers for the high-voltage power supplies.

Internal controls shall include an input sensitivity switch to select between

0.775 V, 1.4 V or a ﬁxed voltage gain of 26 dB for full rated output.

Front panel indicators shall include an amber power enable indicator and

an amber protection system indicator (ODEP) for each channel which shall

normally be illuminated to conﬁrm the availability of reserve thermody-

namic energy and which shall dim in proportion to limiting when the power

demands of the output stages have been exceeded.

The power ampliﬁer shall meet or exceed the following performance

criteria. Input sensitivity for rated output: 26 dB voltage gain (unbalanced).

Rated FTC output in stereo mode with less than 0.1% THD: 685 watts per

channel (20 Hz to 20 kHz) into 4 ohms; 495 watts per channel (20 Hz to

20 kHz) into 8 ohms. Rated FTC output in bridged-mono mode with less

than 0.1% THD: 1355 watts (20 Hz to 20 kHz) into 8 ohms; 955 watts (20

Hz to 20 kHz) into 16 ohms. Hum and noise: at least 105 dB (A weighted)

below full rated output power. Phase response: 10 degrees from 10 Hz to

20 kHz at 1 watt. Frequency response: 20 Hz to 20 kHz, 0.1 dB at 1 watt

into 8 ohms per channel in stereo mode. Damping factor: greater than

1000 from 10 to 400 Hz into 8 ohms. Intermodulation distortion (SMPTE):

less than 0.05% from 163 milliwatts to rated power into 8 ohms in stereo

mode. Harmonic distortion at rated power into 8 ohms per channel (stereo

mode): less than 0.05% from 20 Hz to 1 kHz and increasing linearly to less

than 0.1% at 20 kHz.

The ampliﬁer shall be safe when driving any kind of load—even highly

reactive ones.

The power requirements shall be 120 VAC at 60 Hz. At idle, the ampliﬁer

shall draw 100 watts or less.

The ampliﬁer chassis shall be constructed of steel with a durable black

ﬁnish and shall be designed for ﬂow-through fan-assisted ventilation from

the front panel to the side panels. The ampliﬁer shall have an aluminum

front panel with Lexan overlay and air ﬁlter media.

The dimensions of the ampliﬁer shall allow for 19 inch (48.3 cm) EIA stan-

dard (RS-310-B) rack mounting. The ampliﬁer shall be 3.5 inches (8.9 cm)

tall and 16 inches (40.6 cm) deep behind the rack-mounting surface.

The ampliﬁer shall weigh 46 pounds, 14 ounces (18.6 kg) and shall have a

center of gravity approximately 6 inches (15.2 cm) behind the front panel.

The ampliﬁer shall be designated the Crown Micro-Tech 2400.

Summary of Contents

Page 1

Crown International1718 W. Mishawaka Rd.Elkhart, IN 46517-9439TEL: 574-294-8200FAX: 574-294-8FAXwww.crownaudio.comMT 240004/05

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