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SR 1.500 Amplifier | 1000 W total power | 1 x 1000 W @ 1ohm | D-class

The Audison SR 1.500 is a 1-ohm stable mono amplifier with a built-in crossover featuring compact dimensions and an impressive RMS power of 1000 W.  

Amplifier Tech Data

Channels 1
Class D-Class
Hi Level Input Yes
Low Level Input Yes
Digital Input No
Power supply voltage / fuse 11 ÷ 15 VDC / 2 x 35A
Operating power supply voltage 6.5 ÷17 VDC
Idling current 0.8 A
Idling current when off 0.02 mA
Consumption @ 14.4 VDC, 2Ω, Max Musical Power 40 A
Remote OUT 6.5 ÷ 15 VDC (150 mA)
Remote IN 6.5 ÷ 15 VDC (1 mA)
ART - Automatic Remote Turn on/off from OUTPUT BTL speakers (Selectable) 1.5 ÷ 7 VDC

Amplifier Stage

Distortion - THD @ 100 Hz, 4Ω, 70% Rated Power 0.1 %
Bandwidth A (-3 dB, 2 VRMS, 4 Ω): 10Hz ÷ 500 Hz
S/N ratio A (A weighted @ 1 V): 100 dBA
Damping factor A > 300
Input sensitivity Pre-In 0.2 ÷ 5 VRMS
Input sensitivity Speaker-In 0.8 ÷ 20 VRMS
Total Power RMS 1000 W
Minimum load impedance
Output Power (RMS) @14.4 VDC, 1% THD 1Ch 500 W x 1 (4Ω)

1Ch 800 W x 1 (2Ω)

1Ch 1000 W x 1 (1Ω)
Adjustable Crossover No

CEA Specifications

Output power @ 4Ω, 1% THD+N, 14.4 V 500 W x 1 Ch
SN ratio (ref. 1W output) 75 dBA


Input Type Pre-In / Speaker-In
Filters Outputs PRE OUT Hi-Pass filtered 50 ÷ 250Hz @ 12 dB/Oct.
Filter Pass A Filters: Full LP 50 ÷ 250Hz @ 24 dB/Oct.
Inputs/Outputs Phase (0 ÷ 180) deg
Inputs/Outputs Bass Boost (0 ÷12) dB
Inputs/Outputs Subsonic 25 Hz @ 24 dB/Oct.
Remote Sub Volume (-20 ÷ 6) dB


Weight 2.23 kg


SR 1.500
Dimension A 264 mm
Dimension B 234 mm
Dimension C 155 mm
Dimension D 135 mm
Dimension E 47.5 mm


The optional VCR-S2 subwoofer volume control provides the ability to adapt the subwoofer level to any personal preference and favorite music genre. VCR S2 features a bulletproof Molex connector.
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  • Elegant and functional design with rounded corners to minimize space, facilitating installation.
  • Built-in USS (Universal Speakers Simulator).
  • Full built-in crossover section.
  • Optional VCR-S1 remote control offers the possibility to adjust the subwoofer level (-20 / + 6 dB) to your musical preference.
  • Balanced high-level inputs for connecting to the OEM head unit speaker output
  • Low-level RCA for after-market speakers.
  • ART (Automatic Remote On/Off) function.
  • Remote IN / OUT socket to allow control of multiple amplifiers.
  • PRE-OUT allows for system expansion.


USS - Universal Speakers Simulator

Thanks to the integration of Audison USS technology (Universal Speakers Simulator) in the high-level inputs, the SR amplifiers can also be appropriately connected to OEM sources featuring the “speaker load detection” function that monitor the presence of a low-impedance load to enable audio outputs.

ADT - Audison D-Class Technology

Class D amplifiers are also called “switching amplifiers”, since their efficiencies are arrived at by rapid on and off switching of the output transistors. Audison Class D uses a much higher switching frequency than most other amplifiers. You might think the switching frequency for all Class D amps are the same, but Class D chipsets allow significant latitude in many design aspects, such as switching frequency and timing. Most companies use as low a switching frequency as possible – this makes the timing easier to manage, and allows the use of lower-precision components which cost less. ACD uses a switching frequency twice as fast as many other modern Class D amplifiers. Higher switching frequencies require incredibly precise timing, which require higher-tolerance components to be used in order to keep the timing pulses from overlapping (that causes catastrophic failure of the output transistor). Audison uses very high-tolerance component parts to keep the timing correct even during temperature extremes (temperature changes shift the values of analog components). To Audison, this is worth the cost, since the higher switching frequency of Audison Class D moves noise much farther away from the audible band. Audison Class D also uses a steeper 4th-order analog lowpass filter, rather than the simpler 2nd-order lowpass filters usually used in competing designs. The steeper filter will keep noise much lower in amplitude – which is good for controlling EMI and for preventing infrasonic noise getting to the tweeters. It also keeps phase shift outside the audible range. The cost is higher – twice as many components are needed for a 4th order filter compared to the usual 2nd-order filter, and each output channel needs its own filter – but Audison determined through exhaustive listening testing that this design was the best-sounding approach.

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