Audison SR 1.500 Review: Compact Mono Amp Rated to 1000 W RMS at 1 Ohm
The Audison SR 1.500 is a compact mono Class D amplifier rated at 500 W RMS into 4 Ω, 800 W into 2 Ω and 1000 W into 1 Ω (14.4 V, 1% THD), with a built-in low-pass filter and speaker-level inputs. Its Indian MRP is ₹49,990, below the SR 5.600 and SR 6.600 in Audison's SR range. This review covers the published figures, what the manual says about heat and fusing, the two owner reviews we found, and how it compares with the Zapco ST-1000XM III, Hertz DP 1.500 and Forza AF M1D. The amplifier and its current price are on our Audison SR 1.500 product page.
Quick summary
Audison rates it at 500 W into 4 Ω, 800 W into 2 Ω and 1000 W into 1 Ω RMS (14.4 V, 1% THD); 1 Ω is the listed minimum load.
Audison lists balanced speaker-level inputs for OEM head units, with USS and ART turn-on, alongside RCA inputs.
Fanless extruded-aluminium body, 264 x 155 x 47.5 mm and 2.23 kg; the manual asks for clear air around it.
We found two short owner reviews from 2024, one praising its quality and heat behaviour and one calling it too expensive for the sound. That is too little to call a consensus.
Audison SR 1.500 specifications
Specification | Audison SR 1.500 |
|---|---|
Type | Mono Class D amplifier (ADT) |
Output power, RMS (14.4 V, 1% THD) | 500 W x 1 at 4 Ω / 800 W x 1 at 2 Ω / 1000 W x 1 at 1 Ω |
Minimum load | 1 Ω |
THD | 0.1% (100 Hz, 4 Ω, 70% rated power) |
Signal-to-noise ratio | 100 dBA |
Damping factor | More than 300 |
Bandwidth | 10 Hz – 500 Hz |
Input sensitivity | Pre-in 0.2–5 V RMS; speaker-in 0.8–20 V RMS |
Low-pass filter | 50–250 Hz at 24 dB/oct |
Subsonic filter | 25 Hz at 24 dB/oct |
Bass boost | 0–12 dB at 50 Hz |
Phase | 0–180° |
Power supply | 11–15 V DC (operating 6.5–17 V DC) |
Fuses | 2 x 35 A |
Dimensions | 264 x 155 x 47.5 mm |
Weight | 2.23 kg |
India MRP | ₹49,990 |
Figures come from Audison's SR 1.500 page and its technical sheet, and match our listing. Audison's product page gives the low-pass range as 50–250 Hz, but the tech sheet's feature list says 50–500 Hz and its tables show other ranges, so treat the top of the range as unconfirmed when planning a crossover near it.
What 500, 800 and 1000 W mean for your subwoofer
Output rises as impedance falls, so the load you build decides which rating you get. A single 4 Ω voice coil gets 500 W. Two single 4 Ω subwoofers in parallel make 2 Ω and 800 W. Four 4 Ω coils in parallel, such as two dual-coil subwoofers with every coil paralleled, reach 1 Ω and 1000 W.
Start from the subwoofer, not the amplifier. Check its continuous power handling and the wiring its coils allow, choose the wiring that lands near that power, then read the amplifier's rating at that impedance. A subwoofer rated for 300 W will not enjoy 1000 W, and one that can take far more than 500 W gets only 500 W from a 4 Ω hookup. Audison measures at 14.4 V, so treat the numbers as a ceiling: a car idling with the AC on may sit lower, and output drops when the supply voltage drops.
The controls suit a bass amplifier: a 24 dB/oct low-pass, a switchable 25 Hz subsonic filter, bass boost and phase. The optional VCR-S2 remote adds a remote level control, which Audison gives as −20 to +6 dB. Use the bass boost sparingly, because 12 dB asks for far more power at 50 Hz and can drive the amplifier into clipping.
Feeding it from a factory head unit
Many cars with factory touchscreens have no RCA outputs, so the signal has to come from speaker wires. Audison lists balanced speaker-level inputs, a built-in USS for OEM sources that use speaker-load detection, and ART, which switches the amplifier on and off from that signal when enabled. Audison describes the pre-out as being for system expansion. Which speaker pair to tap, and how your head unit's output behaves, depends on the car, so confirm both before anything is cut.
What owners and reviewers say about the Audison SR 1.500
This is what we found when we checked in October 2026, and it is thin. OnlineCarStereo's SR 1.500 page carried two short customer reviews, dated March and May 2024, with no star ratings or average. The page does not say whether reviews are moderated.
The earlier reviewer called it a high-quality amplifier that did not overheat after hours of use. The later one found it small and light, which made setup easier, but thought it too expensive for the sound they were getting and believed cheaper amplifiers perform better. Neither says which subwoofer or settings were involved. Sound of Tristate's page showed no reviews, and Audison's own pages are promotional, so we have not counted them as opinions. If you own an SR 1.500, we would like to hear how it behaves in your car.
Audison SR 1.500 vs Zapco ST-1000XM III, Hertz DP 1.500 and AF M1D
The Zapco ST-1000XM III has the same ₹49,990 MRP. Zapco lists 500 W at 4 Ω, 700 W at 2 Ω and 1000 W at 1 Ω, so Audison's 800 W at 2 Ω is higher on paper. Zapco lists 325 mm overall length against the Audison's 264 mm. Zapco's catalogue lists RCA inputs, and its website lists a variable crossover and an adjustable bass-boost centre frequency. The Audison lists speaker-level inputs with USS and ART, which matter with a factory head unit.
The Hertz DP 1.500, from Audison's sister brand, has an MRP of ₹24,990. Hertz rates it at 280 W at 4 Ω and 500 W at 2 Ω (1% THD, 14.4 V), with a 2 Ω minimum load. The Audison is rated higher at both loads and adds the 1 Ω option for ₹25,000 more. If one subwoofer needs no more than the Hertz's rating, the Hertz costs roughly half as much.
The Audison AF M1D (₹99,990 MRP) is rated 600 W, 1000 W and 1200 W at 4, 2 and 1 Ω, with a low-pass that tops out at 150 Hz against 250 Hz in the SR 1.500's table. For four channels from the SR range, see our SR 4.300 and SR 4.500 posts; both carry correction notes, so rely on Audison's published ratings.
Who should buy it, and who shouldn't
Buy the SR 1.500 if you want one compact mono amplifier for a single subwoofer or a pair, may want a 1 Ω load, or have a factory head unit without RCA outputs. At 47.5 mm tall it may suit tight spots, but it still needs the clearance the manual asks for, so measure first.
Look elsewhere if your subwoofer needs only a few hundred watts at 4 Ω, where the Hertz DP 1.500 is rated for 280 W and costs less. If your crossover plan depends on the top of the low-pass range, treat that figure as unconfirmed.
Installation notes for Indian cars
Heat is the first constraint. Audison's manual says to install the amplifier where the temperature stays between 0 °C and 55 °C, keep its outline at least 5 cm from walls, allow good air circulation and never cover the heat sink, or it goes into protection. It also warns that the amplifier can reach about 80 °C. In an Indian summer, a fanless amplifier buried under luggage in a closed boot is the case to avoid. Choose a mounting board with open air around it, out of direct sun, and keep it away from the engine compartment, water, humidity and dust, as the manual says.
Audison asks you to check that the alternator and battery can handle the extra consumption, and says the fuse at the battery must be rated 30% higher than the amplifier's built-in fuse. This model has two 35 A fuses inside and Audison lists a draw of 40 A at maximum musical power, so size the cable from the manual's tables rather than guessing. The manual's text puts the fuse holder within 40 cm of the battery's positive terminal while one diagram says 20 cm, so keep it as close as the car allows. VA3 Car Studio in Ghaziabad offers professional installation, and we build custom subwoofer enclosures to the volume your subwoofer specifies.
Price and where to buy
The Audison SR 1.500 has an MRP of ₹49,990 in India. Check the current price and availability on the Audison SR 1.500 product page. Warranty is per Audison's published terms; confirm India terms with us. The optional Audison VCR-S2 remote volume control has its own listing, and Audison's VCR-S2 page names the SR 1.500 among the amplifiers it works with.
The bottom line
The Audison SR 1.500 is a compact mono amplifier rated to 1000 W at 1 Ω, with speaker-level inputs for factory head units. The owner feedback we found is two short reviews, one praising quality and heat behaviour and the other calling it too expensive for the sound. Plan the subwoofer wiring first, give the amplifier air and a correct fuse, and build around the numbers on the sheet.
Audison SR 1.500 FAQ
Is the Audison SR 1.500 stable at 1 ohm?
Yes. Audison lists 1 Ω as the minimum load and rates the amplifier at 1000 W RMS into 1 Ω at 14.4 V and 1% THD. Check that the subwoofer can handle that power.
Can the Audison SR 1.500 work with a factory head unit?
Audison lists balanced speaker-level inputs for OEM head units, a built-in USS and ART automatic turn-on from the speaker signal. Whether it works cleanly depends on the car, so confirm before you buy.
How is the Audison SR 1.500 different from the Hertz DP 1.500?
The Audison is rated 500 W at 4 Ω and 800 W at 2 Ω and goes down to 1 Ω. The Hertz is rated 280 W at 4 Ω and 500 W at 2 Ω with a 2 Ω minimum, and its MRP is ₹24,990 against ₹49,990.
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