Crown Audio CTs Series (2 Channel) - Manual (Page 3)

Operation Manual
CTs Power Amplifiers
page 4 page 5
CTs Power Amplifiers
Operation Manual
Important Safety Instructions ......................................2
Declaration of Conformity ...........................................3
1 Welcome .........................................5
1.1 Features ...........................................................5
2 How to Use This Manual ........................6
3 Setup ..............................................7
3.1 Unpack Your Amplifier .....................................7
3.2 Install Your Amplifier ........................................7
3.3 Ensure Proper Cooling .....................................7
3.4 Choose Input Wire and Connectors ..................8
3.5 Choose Output Wire and Connectors ...............8
3.6 Wire Your System .............................................9
3.6.1 Dual 8/4/2 Mode ......................................9
3.6.2 Bridge-Mono 16/8/4 Mode .......................9
3.6.3 Dual 70V/100V Mode ...............................10
3.6.4 Bridge-Mono 140V/200V Mode ...............10
3.6.5 Dual Mode with “Y” Input .........................11
3.7 Connect to AC Mains .......................................12
3.8 Startup Procedure ............................................12
4 Operation .........................................12
4.1 Precautions ......................................................12
4.2 Front Panel Controls and Indicators .................13
4.3 Back Panel Controls and Connectors ...............14
5 advanced Features and Options ...............15
5.1 Protection Systems ..........................................15
5.1.1 Thermal Level Control (TLC) ....................15
5.1.2 Junction Temperature Simulation (JTS).....15
5.1.3 Fault .........................................................15
5.1.4 High-Pass Filters .....................................15
5.1.5 Low-Pass Filters ......................................15
5.1.6 AC Under/Over Voltage Protection ...........15
5.1.7 Circuit Breaker .........................................15
5.1.8 DC Output Servo ......................................15
5.1.9 Inrush Limiting .........................................15
5.1.10 Variable-speed Fans ...............................15
5.2 Advanced Features ...........................................15
5.2.1 Switching Power Supply ..........................15
5.2.2 Input Compressor ....................................15
5.2.3 Sleep Circuit .............................................15
5.2.4 Input Sensitivity Switches ........................16
5.3 Options ............................................................16
5.3.1 Nominal Attenuation Settings ...................17
6 Troubleshooting ..................................18
7 Specifications ....................................20
8 ac Power draw and Thermal dissipation .....24
9 Service ............................................28
9.1. International and Canada Service ....................28
9.2 US Service .......................................................28
9.2.1 Service at a US Service Center ..................28
9.2.2 Factory Service ........................................28
9.2.3 Factory Service Shipping Instructions .......28
9.2.4 Packing Instructions .................................28
9.2.5 Estimate Approval .....................................28
9.2.6 Payment of Non-Warranty Repairs.............28
10 Warranty ........................................29
Factory Service Information Form ...............................31
Product Registration Form ...........................................33
Table of Contents
1 Welcome
Building on the foundation of the Com-Tech ®
Series, the Crown ® CTs Series offers new
flexi bility and value for installed sound. The
Com-Tech Series was the first to offer
independent selection of high- and low-
impedance opera tion for a specific channel, and
CTs Series amplifiers continue that tradition,
with power levels and features carefully chosen
to perfectly integrate into fixed install design
requirements.
Modern power amplifiers are sophisticated
pieces of engineering capable of producing
extremely high power levels. They must be
treated with respect and correctly installed if
they are to provide the many years of reliable
service for which they were designed.
In addition, CTs Series amplifiers include a
number of features which require some
expla nation before they can be used to their
maxi mum advantage.
Please take the time to study this manual so that
you can obtain the best possible service from
your amplifier.
1.1 Features
• Switching Power Supply for reduced
weight.
• High power-density, with all two-channel
models in a 2U chassis.
• Direct constant-voltage
(70V/140V) or low-impedance (2/4/8 ohm)
operation. No switch required.
• Input sensitivity is independently
select able for each channel. Choose low-
imped ance (4/8 ohm), constant-voltage
(70V/100V/140V/200V), or 26 dB.
• TLC protection circuitry protects the
amplifier from long-term excessive heat by
subtly and dynamically reducing the gain
only when necessary.
• JTS circuitry (CTs 600/1200 only) quickly
protects BJT output transistors from unsafe
operating conditions without shut ting the
channel down. (Not applicable to BCA
amplifiers as they are inherently pro tected.)
• PIP2™ (Programmable Input Processor)
connector accepts accessory modules that
tailor the amplifier to suit specific
applica tions.
• Removable terminal block input
connec tors, with “Y” Input Switch in the
standard PIP2-BBY module.
(Continued on next page)