The Datasat RA7300 Multi-Channel Power Amplifiers bring a new level of quality and flexibility to high-end home theatre and multi-channel music systems. Perfect for anything from small media systems to dedicated top of the line home cinemas or even to outfit an entire home or estate, its advanced circuitry and careful design delivers one of the industry's most powerful, versatile and quietest power amplifiers.

The fully balanced differential design of the RA7300 doubles amplifier speed (slew rate) while reducing noise by 50%. Dual thermal sensors control very low speed fans with substantial heat sinks. The fan only operates when program material requires additional cooling to ensure fan noise is always masked by the content. In addition, dual DC servos ensure DC offset is minimised and thermal track transistors maintain the amplifier at its optimum bias point independent of its temperature.

The result is consistently low distortion and extremely quiet operation that provides highly accurate and refined music and soundstage reproduction. The RA7300 can support the latest multi-channel digital surround sound formats for outstanding audio quality even in the most demanding operating conditions.

The RA7300 is designed to be versatile and is rated for 4 and 8 ohm loads. With a rated output of 300 watts RMS into seven channels at 8 ohms, the RA7300 is powerful enough to deliver consistently excellent performance in any system.

The RA7300 amplifier is deigned to complement Datasat's RS20i high-end audio processor as well as the RA2400 stereo amplifier providing the ultimate listening experience for luxury home cinema.

 

The quietest amplifiers available

Dual thermal sensors, one for each channel or channel bank, control a very low speed fan with substantial heat sinks. The fan only operates when program material requires additional cooling to ensure any fan noise is always masked by the content. In this way, the RA7300 delivers a signal-to-noise ratio of >125dB ('A' weighted, referenced to full output).

Innovative, modular design

Each RA7300 amplifier channel is designed complete with the power supply on a single printed circuit board. Separate power supplies for each channel minimise crosstalk, noise and distortion. This approach provides for ease of replacement and system maintenance.

Enhanced versatility

The RA7300 is rated for 4 and 8 ohm loads. It delivers 7 channels of 300 watts RMS power at 8 ohms. It delivers 450 watts RMS at 4 ohms.

Extended connectivity

The RA7300 features DB25 connectors with pass-through and channel ID selections that mate perfectly with the Datasat RS20i audio processor. It also includes balanced XLR and unbalanced RCA connectors.


The RA2400 features DB25 connectors with pass-through and channel ID selectionsthat mate perfectly with the Datasat RS20i audio processor. It also features balanced XLR and unbalanced RCA connectors.

Consistent, thermal-independent operations

The RA7300 amplifier uses dual-DC servos to ensure that DC offset is at a minimum and thermal-track transistors maintain the amplifiers at their optimum bias point independent of amplifier temperature. The amplifiers operate without current limiting.

Advanced circuitry

The fully balanced differential topology of the RA7300 doubles amplifier slew rate and reduces noise by half. It uses current feedback to increase amplifier speed. 

Efficient standby

The Datasat RA7300 amplifier meets or exceeds all international standards for standby power consumption including the new 122 watt standard.



 

Datasat RA7300 Stereo Power Amplifier

Power Output

300 watts RMS x 7 channels @ 8ohms
450 watts RMS x 7 channels @ 4ohms

Frequency Response: 20Hz-20kHZ, +0, -0.25dB
THD, 20Hz-20kHz: <0.05%
THD, 1kHz, rated power: <0.005%
IMD: <0.05%

Dual AC cords

Channels
User selectable for any of 8 channels from DB25 input connector via rear panel gold-plated sealed DIP switches.

Power Bandwidth, 10Hz-80kHz: minus 0.6dB @ 80Hz

Voltage Gain: 27.1dB
Slew Rate: >40/us
Crosstalk @ 1kHz: >80dB
Input impedance: 50kΩ (Balanced, 25kΩ each leg)
Input Sensitivity: 2.16V

Circuit topology
Fully balanced design utilizing thermal track, current feedback and DC Servo.

Connectivity
Input: RCA unbalanced, XLR balanced, DB25 balanced
Output: 5-way binding posts, DB25 pass through

Remote Trigger Voltage: 3-24V


 

Signal-to-Noise ratio (20Hz-20kHz)
Reference rated output, 'A' weighted: >125dB
Reference rated output, unweighted: >123dB
Residual noise, 'A' weighed: <30 microVolts

Damping Factor: >200 to 2kHZ       

Dimensions
Fan cooled, 5 Rack Chassis
H/W/D: 22.23cm x 43.18cm (48.26cm with rack ears) x 53.34cm
       Uses 5RU (Feet removed)
Weight: 123lbs
Weight shipping: 163lbs
Power requirements: 120V, 60Hz & 230V,50Hz

 

Datasat Digital Consumer Product Brochure
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