RAM CB series – 2×560 Watt Amplifier

CB Series ?  CB 1402
Rugged Power Amplifier

Presentation
The CB Series is a medium cost ensemble of amplifiers covering the most used power specifications. The four offered models share the well proven RAM Audio topology for ease of servicing.

The latest breakthrough in component assembly and manufacturing processes are present in this new Series.

All the models are equipped with high efficiency toroidal transformers and long life capacitors in a common, sturdy two U steel chassis.

The sum of these specs put them on the front row of cost/effectiveness for all fixed and mobile uses.

Features
 2U heavy duty steel chassis
 Modular construction for easy servicing
 Symmetrical layout for even weight distribution
 High efficiency toroidal main transformer
 Oversized, high energy, linear power supply
 Dual, parallel or bridged operation
 Twin balanced inputs (Neutrik XLR connectors)
 Three dedicated Speakon outputs
 High quality components used throughout
 Efficient back to front cooling
 Dual, continuously variable speed axial fans
 Fault, signal, and clip indicators
 Functional integrated front panel design
 Heavy duty alloy carrying handles

Protections
 Calibrated mains fuse
 Independent channel supply fuses
 Input signal muting at turn on
 Continuous short-circuit protection (CSP)
 Thermal overload protection
 Intelligent clip-limiter (ICL)
 Progressive Ramp input signal
 Currentless relay operation (CRO)

Technical Specifications
Output Power  
Continuous Average Power RMS, 1kHz, 1.0%THD+N

@ 2 ohms: 2x 710W
@ 4 ohms: 2x 560W
@ 8 ohms: 2x 390W
Bridge @ 4 ohms: 1420W
Bridge @ 8 ohms: 1120W

Pink Noise 12dB Crest Factor

@ 2 ohms: 2x 1100W
@ 4 ohms: 2x 750W

Frequency Response
Power Bandwidth ±0.25dB  20Hz - 20kHz

Phase Response
@ 1watt 20Hz - 20kHz  Â±15deg

Total Harmonic Distortion
20Hz - 20kHz  
Intermodulation Distortion
SMPTE  
Crosstalk
20Hz - 20kHz  >75dB

Voltage Gain
dB  33dB

Sensitivity
Rated Power@4ohms  1V

Signal-to-Noise-Ratio
A weighted  110dB

Required AC Mains 230V/50Hz or 120V/60Hz
1/8 rated power (230V@4ohms)  3.7A

Dimensions
W x H x D  483 x 89 x 450 mm
19 x 3.5 x 17.7 in

Weight
Shipping: 18.8 Kg - 41.5 Lbs
Net: 18 Kg - 39.7 Lbs

Protections
Soft-start, Turn-on Turn-off transients, Muting at turn-on, Over-heating, DC, RF, Short-circuit (CSP), Open or mismatched loads, Overloaded power supply, Input overload (ICL), CRO

Crownʼs new CTs series of power amplifiers are remarkable for their loud, punchy sound; sustained, tight bass; and superior protection against overheating and overload. This paper explains the design features behind those advantages. After reading this information, youʼll know why Crown CTs amps sound better than the competition. CTs amplifiers can provide large amounts of power into various loads, such as 2, 4, 8 ohms and 70V. With most power amps, the maximum output power tends to drop as the load impedance increases. But with the CTs series, the power stays the same at almost any impedance. 2-ohm Dual (per Ch.) 250W 4-ohm Dual (per Ch.) 600W 8-ohm Dual (per Ch.) 600W 16-ohm Dual (per Ch.) 300W 70V Dual (per Ch.) 600W 4-ohm Bridge 500W 8-ohm Bridge 1200W 16-ohm Bridge 1200W 140V Bridge 1200W Crown switching power supply for less weight Sustained Power on long-duration signals due to regulated, "stiff” power supplies with incredible energy storage (huge filter capacitors). Extra Hidden Power during high-level transients and during incomplete use of all the channels. Overheating and overload protection thanks to the sophisticated TLC circuitry which compresses the signal only when needed. Compression is controlled not by temperature, but by signal voltage. This keeps the loudness up during compression more than with competitive amps.

A full model revision takes Yamaha's high-end PC-N power amplifiers to the next level - the PC-1N
Series. The new PC-1N Series amplifiers feature an extraordinarily solid low end, rich midrange,
and superbly defined highs. They also deliver fast response and exceptional stability even in the face
of serious power supply limitations. Refinements throughout this expanded five-model lineup make
these amplifiers the new benchmarks for quality, reliability, and versatility in professional applications.
Frequency Response: 10 Hz – 40 KHz. Output Power: 2 x 400 Watt / 8Ω RMS, 2 x 700 Watt / 4Ω RMS,
1400 Watt / 8Ω bridge RMS. Weight: 13 Kg.