Asystems SR 707
SR 703 707 backSR 707 sideSR 707 app

SR707    700 Watt Power Amplifier


The feature-packed SR series of power amplifiers is versatile, rugged and time-tested. The Asystems SR707 power amplifier is specifically designed with the needs of sound contractors in mind. Output is selectable between low-impedance, or 25V, 70V and 100V Line operation, dependent on wiring. Looking to expand your system? An XLR thru output is also available on each channel for line-level signals to additional amplifiers. Each amplifier channel has a separate toroidal secondary transformer that provides full electrical isolation and ensures maximum audio separation. Features like power up muting, full short-circuit, temperature, DC offset protection and a built-in 45 Hz subsonic filter help make the SR series an attractive, attractive solution for any audio installation.



  • Output power: 2 x 350W at 4 ohms, 70V or 100V
  • Low impedance output (2 ohms): 550W per channel
  • Stereo, bridge or parallel operation modes selectable via rear mounted switch
  • XLR and barrier strip input connectors
  • Line-level XLR ‘thru’ output connectors
  • Output via covered barrier strips
  • Wide range of protection circuitry and rumble/electrical filters for complete peace of mind
  • Toroidal output transformers provide full electrical isolation and meet worldwide safety standards
  • Rack mountable design taking up 3 standard rack spaces (19″ rack)
  • Automatic dual-speed, high-efficiency cooling fan



Direct Power Out
8 ohm 240 Watts x 2
4 ohm 400 Watts x 2
2 ohm, 1kHz, 1%THD 550 Watts x 2
Bridged mono 8 ohm, 1kHz, 1%THD 800 Watts
Bridged mono 4 ohm, 1kHz, 1%THD 1100 Watts
Isolated Constant Voltage Out
200V or 140V Bridge 400 Watts
100V or 70V 350 Watts x 2
25V 280 Watts
Frequency Response
Direct Outputs (+0/-2dB) 50Hz – 50kHz
Isolated Outputs (+0/-2dB) 50Hz – 16kHz
Total Harmonic Distortion <0.05
Sensitivity (for full output) 1.02V
Voltage Gain 28dB
Input Impedance
Balanced/Unbalanced 20k/10k ohm
Damping Factor >200 (direct output)
S/N Ratio Less than 100dB below rated output (20Hz – 20kHz)
Protection Circuits Output offset voitage protection
Heat sink overheat protection
Transformer overheat protection
Load shorting protection
Power on/off protection
Front Panel Power Switch
Rear Panel Ch 1 & Ch 2 gain controls (41 click); Parallel/Stereo/Bridge Switch
Input XLR Jack x 2, Barrier Strip x 1
Output Covered Barrier Strip x 2; Heavy-Duty Binding Post
Cooling One dual speed fan
Indicators Clip: Red
Signal: Green
Protect: Yellow
Power: Red
Dimensions (HxWxD) 132 x 480 x 428mm (5.2” x 19” x 16.9”)
Net Weight 24.7 Kg (54.6 lbs)

Click here to download Asystems SR 703 & SR 707 Power Amplifiers Brochure

Click here to download Asystems SR703 & SR707 Power Amplifier user manual

$25.99 $15.99

Tour tough built, sleek design, impressive specs, excellent cost per watt performance, efficient under any application. With these credentials, FBT proudly presents the new AX series of power amplifiers, the perfect power mates for sound reinforcement speaker systems. The AX series consists in four 2HU rack mount models, from 800 to 3000 watts, all designed with sophisticated power amp circuits for improved quality, stability and reliability, all equipped with Stereo-Parallel-Bridge operation mode, dB sensitivity switch (26-29-32dB), limiter, ground lift, XLR/Jack inputs (plus extra RCA input on AX 800), Speakon/Binding posts outputs.