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

This professional stereo power amplifier, working in class-H mode, provides 2x800W, at an efficiency of around 85%.

A passive transformer based power supply and hand selected components makes this power rating possible with exceptional audio quality and absolute reliability, even in the 2 Ohm mode. The output stage is fully protected against over-temperature, short circuit, RFI and equipped with soft start circuit and temperature-controlled fan cooling.  The integral soft clip limiter protects against damage to the connected loudspeakers.  The activity of a protective circuit, signal and limiter is shown for each channel by LEDʼs.

- Power levels matched to the most popular speakers used by entertainers
- Optimized for maximum real-world headroom into 4 ohm and 8 ohm speaker systems
- Inputs: XLR, 1/4" TRS and phono input connectors for compatibility with any source
- Outputs: Speakon(R) combo accepts, 1/4" (TS) plugs or Speakon 2-pole and 4-pole plugs (connects 2 poles only). Binding posts support all other speaker wiring systems
- Minimum depth chassis (10.1“/257 mm) fits in compact, inexpensive effects racks
- Lightweight - GX7 is only 15.5 lbs (7 kg)
- Detented gain controls for precise setting and matching of sensitivity
- GuardRail(TM) automatically protects the amplifier and loudspeakers from damage due to temperature rise or overdrive without shutting down the show
- Front panel LEDs monitor Power, Signal and Clipping
- Subwoofer/Satellite crossover built-in
- 230V 16.5 lbs (7.5 kg)

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.

• Output power: 750W @ 4 Ohms stereo, 500W @ 8 Ohms stereo
• High-current toroidal transformers for greater power and low noise
• Independent user-defeatable peak limiters reduce distortion
• Selectable High-Pass filter at 30Hz or 50Hz
• XLR and 1/4\' TRS input jacks
• Binding post and Speakon?-type outputs
• Front mounted gain controls for easy access
• Signal and Peak LED indicators to monitor performance
• Short circuit, thermal, subsonic, RF protection, output DC offset
• Power on/off muting