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PRICE: £8000

RD4-700M is a highly flexible, powerful andintelligent 4-Channel power amplifier delivering upto a total of 4x700W @ 8ohm

RD4-700M is a highly flexible, powerful and intelligent 4-Channel power amplifier delivering up to a total of 4x1500W @ 8ohm, or able to drive 70V Constant Voltage Lines. Designed to meet the most demanding portable and fixed installation sound systems, it provides a full set of value added features such as high output power, efficient cooling system, on board DSP and USB/Ethernet for monitoring and control via PC software.

RD4-700M includes a highly efficient Switch Mode Power Supply, which provides power to the output stages. The 4 output stages use Class D amplifier module-full bandwith PWM modulator obtaining ultra low distortion, high efficiency and also equipped with a full set of circuit protections. Furthermore the Clip/Limiter function provides output monitoring to prevent speaker damage with gentle gain reduction at clip threshold, in addition to the efficient heat dissipation system and Over-Heat protection which themselves ensure uncompromised reliability.

RD4-700M is more than just an amplifier. It is also a capable and sophisticated loudspeaker processor, thanks to its powerful STOXsound DSP running 96 kHz / 24 bit [ 96 bits precision for the internal intermediate processes] and high performance 24bit AD/DA Converters. It offers 4 channels of slope up to 48dB/Oct IIR HP/LP crossover filters, or up to 512 taps FIR filters[FIR coefficients can be imported as .txt file from external application] , RMS compressor, parametric Eqs , alignment delay and white/pink noise internal generator, everything needed to optimize a loudspeaker system.

Moreover, RD4-700M allows a 12dB headroom on processes overflow. User can also set the parameters, select input source, load presets, etc with the extraordinary touchscreen LCD in front panel. Apart from regular analog and digital source input, DANTE™ is also optional.

Top-grade DSP Engine
12 band parametric equalization per input channel
4 band parametric equalization per output channel
Each band can be switched to Bell, Low/High Shelving variable Q
Warm Backup is available, by setting source priority  and activating "Auto switch" function in PC Sw
FIR or IIR Filters for X-Over:
The X-Over can be implemented both by FIR filters or IIR HP/LP, selectable in the dedicated PC software
FIR: Crossover filter can be created by the user selecting from 256 up to 512 taps, with sortable type and the Out Band attenuation
        FIR Coefficients can be imported as .txt file from external applications
IIR: Crossover filter with slopes from 6 ~ 48 dB/Octave, including Butterworth, Bessel, Linkwitz-Riley and customized configurations.
Each output channel is equipped with a precious Peak Limiter with sortable ratio, attack/release time 
Adjustable Delay time up to 500.998ms for input channel, and 340.998ms for output channel
Each input channel includes a Pink/White noise internal generator, noise gate function, RMS compressor with variable knee, and powerful 12-band PEQ
Model RD4-700M      
Output power (AC 220V / 50Hz. ±10%, All channels driven output power, THD=0.09%)
8Ω stereo 700Wx4      
4Ω stereo 1000Wx4      
2.67Ω stereo NC      
8Ω bridge                               NC      
4Ω bridge        
Other specification
Frequency response 20Hz-40kHz(+1/-1dB)      
THD+N ≤0.001%@0dBu 1KHz      
S/N rate ≥ 113dB      
Input sensitivity 21dBu
Input impedance(bal/unbal) 20kΩ/10kΩ
Voltage gain (8 ohm) 34dB      
Output circuitry Class D
Dimension / Weight
Product Dimension(mm) 482x410x88  
Packaging Dimension(mm)    
G.W. 16.5kg