Page 1
Power-Tech .1 Series Power Amplifiers
page 2Operation Manual Important Safety
Instructions
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 NY A PAS DES PAR-
TIES SERVICEABLE Ã- LINTÉRIEUR. TOUS REPA-
RATIONS DOIT ETRE FAIRE PAR PERSONNEL
QUALIFIÉ SEULMENT.
IMPORTANT
Power-Tech .1 Series amplifiers 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.
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Power-Tech .1 Series Power Amplifiers
page 3 Operation Manual
Important Safety Instructions .............................................. 2
Table of Contents ................................................................. 3
1 Welcome ................................................................................... 4
1.1 Features.......................................................................... 4
2 How to Use This Manual ....................................................... 4
3 Setup.......................................................................................... 5
3.1 Unpack Your Amplifier ............................................... 5
3.2 Install Your Amplifier .................................................. 5
3.3 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 Connect to AC Mains .................................................. 9
3.9 Startup Procedure ....................................................... 9
4 Operation ................................................................................. 9
4.1 Precautions .................................................................. 9
4.2 Front Panel Controls and Indicators ......................... 10
4.3 Back Panel Controls and Connectors ............................. 11 5 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 Option ........................................................................... 14
5.2.1 MT-BB................................................................. 14
6 Troubleshooting ...................................................................... 15
7 Specifications ......................................................................... 16
8 Service ..................................................................................... 17
8.1 Worldwide Service ...................................................... 18
8.2 US and Canada Service .............................................. 18
8.2.1 Service at a US or Canada Service Center ............. 18
8.2.2 Factory Service ..................................................... 18
8.2.3 Factory Service Shipping Instructions................... 18
9 Warranty .................................................................................. 19
Factory Service Information Form ........................................... 21
Table of Contents
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Power-Tech .1 Series Power Amplifiers
page 7 Operation Manual
3.5 Choose Output Wire and Con-
nectors
Crown recommends using pre-built or profes-
sionally wired, high-quality, two-conductor,
heavy gauge speaker wire. Use bare wire, a dual
banana plug or spade lugs on the amplifier end
of each speaker cable (Figure 3.5). To prevent
the possibility of short-circuits, wrap or other-
wise insulate exposed loudspeaker cable con-
nectors.
Using the guidelines below, select the appropri-
ate size of wire based on the distance from
amplifier to speaker.
CAUTION: Never use shielded cable for
output wiring.Distance Wire Size
up to 25 ft. 16 gauge
26-40 ft. 14 gauge
41-60 ft. 12 gauge
61-100 ft. 10 gauge
101-150 ft. 8 gauge
151-250 ft. 6 gauge
Figure 3.5 Output Connector Wiring
3 Setup
