Page 1
Micro-Tech Series Power Amplifiers
page 2Operation Manual
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with a dry cloth.
7) Do not block any ventilation openings. Install
in accordance with the manufacturers instruc-
tions.
8) Do not install near any heat sources such as radiators, heat registers, stoves, or other
apparatus that produce heat.
9) Do not defeat the safety purpose of the polar- ized or grounding-type plug. A polarized plug
has two blades with one wider than the other.
A grounding-type plug has two blades and a
third grounding prong. The wide blade or the
third prong is provided for your safety. If the
provided plug does not fit into your outlet,
consult an electrician for replacement of the
obsolete outlet.
10) Protect the power cord from being walked on or pinched, particularly at plugs, convenience
receptacles, and the point where they exit from
the apparatus.
11) Only use attachments/accessories specified by the manufacturer.
12) Use only with a cart, stand, bracket, or table specified by the manufacturer, or sold with the
apparatus. When a cart is used, use caution
when moving the cart/apparatus combination
to avoid injury from tip-over.
13) Unplug this apparatus during lightning storms
or when unused for long periods of time.
14) Refer all servicing to qualified service person- nel. Servicing is required when the apparatus
has been damaged in any way, such as power-
supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to
rain or moisture, does not operate normally,
or has been dropped.
15) To reduce the risk of fire or electric shock, do
not expose this apparatus to rain or moisture. TO PREVENT ELECTRIC SHOCK DO NOT REMOVE
TOP OR BOTTOM COVERS. NO USER SERVICE-
ABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
Ã- PRÉVENIR LE CHOC ÉLECTRIQUE NENLEVEZ
PAS LES COUVERCLES. IL N Y A PAS DES PAR-
TIES SERVICEABLE Ã- LINTÉRIEUR. TOUS REPA-
RATIONS DOIT ETRE FAIRE PAR PERSONNEL
QUALIFIÉ SEULMENT.
IMPORTANT
The Micro-Tech 2400/2401 requires Class 1
output wiring. The Micro-Tech 600/601/ &
1200/1201 require Class 2
output wiring. MAGNETIC FIELD
CAUTION! Do not locate sensitive high-gain equip-
ment such as preamplifiers or tape decks directly
above or below the unit. Because this amplifier has
a high power density, it has a strong magnetic field
which can induce hum into unshielded devices that
are located nearby. The field is strongest just above
and below the unit.
If an equipment rack is used, we recommend locat-
ing the amplifier(s) in the bottom of the rack and the
preamplifier or other sensitive equipment at the top.
WATCH FOR THESE SYMBOLS:
The lightning bolt triangle is used to alert the user
to the risk of electric shock.
The exclamation point triangle is used to alert the
user to important operating or maintenance instruc-
tions.
Important Safety
Instructions
Page 2
Micro-Tech Series Power Amplifiers
page 3 Operation Manual
Table of Contents
Important Safety Instructions ........................... 2
1 Welcome .......................................................... 4
1.1 Features ...................................................... 4
1.2 Unpacking Your Amplifier ........................... 4
2 How to Use This Manual ............................... 4
3 Setup ................................................................. 5
3.1 Unpack Your Amplifier ............................... 5
3.2 Install Your Amplifier ................................. 5
3.2 Ensure Proper Cooling .............................. 5
3.4 Choose Input Wire and Connectors ........... 6
3.5 Choose Output Wire and Connectors ........ 7
3.6 Wire Your System ...................................... 8
3.6.1 Stereo Mode ..................................... 8
3.6.2 Bridge-Mono Mode .......................... 8
3.6.3 Parallel-Mono Mode ........................ 8
3.7 Set Input Sensitivity ................................... 9
3.8 Set Ground Lift Switch ............................... 9
3.9 Connect to AC Mains ................................ 9
3.10 Startup Procedure .................................... 9
4 Operation ........................................................ 10
4.1 Precautions ................................................ 10
4.2 Controls, Indicators and Connectors .......... 11
4.2.1 Front Panel Facilities ......................... 11
4.2.2 Rear Panel Facilites ............................ 125 Advanced Features and Options ...................................... 13
5.1 Protection Systems ........................................................ 13
5.1.1 Odep ..................................................................... 13
5.1.2. Ultrasonic and Radio Frequency Protection ......... 13
5.1.3 Drive Protection .................................................... 13
5.1.4 Transformer Thermal Protection ........................... 13
5.1.5 Fuses and Circuit Breakers ................................... 13
5.2 Accessories ................................................................... 14
5.2.1 Cooling Fan Options ............................................ 14
5.2.2 Input Connectors Option ..................................... 14
5.3 Filter Cleaning ............................................................... 14
6 Principles of Operation ..................................................... 15
6.1 Overview ....................................................................... 15
6.2 Circuit Theory ............................................................... 15
6.2.1 Stereo Operation ................................................... 16
6.2.2 Bridge-Mono Operation ........................................ 17
6.2.3 Parallel-Mono Operation ...................................... 17
7 Troubleshooting .................................................................. 18
8 Specifications ..................................................................... 19
9 AC Power Draw and Thermal Dissipation ..................... 21
10 Service .............................................................................. 23
10.1 Worldwide Service ........................................................ 23
10.2 US and Canada Service ................................................ 23
10.2.1 Service at a US or Canada Service Center .......... 23
10.2.2 Factory Service ................................................... 23
10.2.3 Factory Service Shipping Instructions ................ 23
11 Warranty ............................................................................. 24
Crown Factory Service Information Form ................................... 27
