Crown ma-1200 Guía De Referencia

Congratulations on your purchase of the renowned
Macro-Tech

®

professional power amplifier. Macro-Tech

amplifiers are designed to provide enormous levels of
pure, undistorted power in a rugged low-profile pack-
age—making them 

the choice for pro sound reinforce-

ment. They utilize our patented ODEP

®

 protection

circuitry to 

keep the show going long after other ampli-

fiers have shut down. And with their PIP expandability,
Macro-Tech amplifiers can be easily customized with
one of our many optional input modules (see Section 8
for a list of available PIP

™

s).

This manual will help you successfully install and use
your new amplifier. Please read all instructions, warn-
ings and cautions. Be sure to read Sections 3.3.2 and
3.3.3 if you plan to use one of the amplifier’s two mono
modes. Also for your protection, please send in your
warranty registration card today and save your bill of
sale because it is your official proof of purchase.

Please unpack and inspect your new amplifier for any
damage that may have occurred during transit. If dam-
age is found, notify the transportation company imme-
diately. Only you, the consignee, may initiate a claim for
shipping damage. Crown will be happy to cooperate
fully as needed. Save the shipping carton as evidence
of damage for the shipper’s inspection.

Even if the unit arrived in perfect condition, as most do,
save all packing materials so you will have them if you
ever need to transport the unit. NEVER SHIP THE UNIT
WITHOUT THE FACTORY PACK.

Macro-Tech amplifiers use cutting edge technology to
deliver the ultimate in power and value for their size,
weight and price. They offer numerous advantages
over conventional designs and provide benefits you
can’t get in amplifiers from any other manufacturer.

Here are some of their many features:

Crown’s Grounded Bridge

™ 

design delivers large voltage

swings without using easily stressed output- transistor
configurations like conventional amplifiers. The results are
lower distortion and superior reliability.

Patented ODEP  (Output Device Emulation Protection) cir-
cuitry compensates for overheating and overload to keep
the amplifier working when others would fail.

IOC

®

 (Input/Output Comparator) circuitry immediately

alerts of any distortion exceeding 0.05%, providing dy-
namic 

proof of distortion-free performance.

PIP (Programmable Input Processor) connector accepts
accessories that tailor the amplifier to suit specific appli-
cations.

Two mono modes (Bridge-Mono and Parallel-Mono) for
driving a wide range of load impedances.

Very low harmonic and intermodulation distortion result in
the best 

dynamic transfer function in the industry.

High damping factor provides superior control over low-
frequency drivers for a clean, accurate low end.

Full protection against shorted outputs, mismatched
loads, input/output DC, general overheating, high-fre-
quency overloads and internal faults.

Dedicated power supply transformers isolate channels in
Stereo mode for superb crosstalk characteristics and reli-
ability—each channel is virtually a separate amplifier.

Balanced inputs with internal three-position sensitivity
switch and adjustable front-panel level controls.

Versatile 5-way binding posts make it easy to connect out-
put wiring.

Ground lift switch isolates the AC power and phone jack
audio grounds.

Efficient heat sinks and a self-contained forced-air cooling
system dissipate heat quickly and evenly for extra ampli-
fier protection and greater power output.

Extra rugged, extruded aluminum front panel with ODEP
and signal presence/IOC indicators for each channel, and
an Enable indicator.

Mounts in a standard 19-inch (48.3-cm) equipment rack
(units can also be stacked).

Three year “No-Fault” full warranty completely protects
your investment and guarantees its specifications.

Fig. 1.1  Macro-Tech Amplifier