Cary Audio Design Cinema 2 Installation And User Manual page 2

Congratulations! You have just purchased one of the finest solid state power amplifiers made.
Whether two, three or five channels, your Cinema power amplifier is the perfect foundation
for your home stereo or theater system. In addition to the awesome power, the Cinema
power amplifier delivers flawless reproduction of musical detail and subtle special effects.
Cary Cinema power amplifier features include:
• Remote trigger (works with + 4.2 to + 32 Volts DC, see page 5)
• Short circuit protection,
• Thermal Protection circuits,
• DC offset protection,
• Matched Sanken, 50 Mhz multiple emitter output transistors.
• Soft start circuit prevents "Brown outs" when amplifier is turned on.
For the technically inclined, the following is an overview of the design characteristics of the
amplifier:
The input of the amplifier is fed into a high quality Burr-Brown op-amp for Balanced to Single-
Ended conversion. This input circuit is connected to a constant current source, differential
style with a current mirror. The pre-drive circuit is constant current Single-Ended Class A.
The output is a follower stage that uses special "designed for audio" high speed power
transistors that have excellent linearity characteristics. The power supply consists of a 700 or
1400 VA toroidal power transformer and either two or four 33,000uF/80V electrolytic
capacitors. Special attention was paid to circuit stabilization and speed of the amplifier to
reduce transient inter-modulation (TIM) distortion.
The Cinema power amplifier has three protection circuits to prevent damage to your speaker
and the power amplifier.
• AC Fuse - Fused with a 3.5A/7.5A for 240V and a 7.5A/15A for 120V.
• Thermal protection - if a channel overheats its output is disconnected until it cools down
to a safe operating temperature.
• DC offset sensor - If an amplifier malfunction or signal source malfunction occurs, the
potential exists for providing DC voltage to the loudspeaker. If this happens, the channel
will automatically shut down. No damage can occur.
In building the Cinema power amplifiers significant effort has been focused on building an
amplifier that delivers outstanding mechanical performance, is easy to use, and has sonic
properties that will delight the most demanding customer. Thank you for choosing Cary
Cinema Design and enjoy your new Cary Cinema power amplifier.
* Short circuit protection activates if load impedance is about 1.6 ohms or less. Constant tripping of short circuit
can degrade output transistors. To reset protection, turn the amplifier off, wait 10 seconds, then turn the
amplifier on.
Cary Cinema Power Amplifiers
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