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Home Mobile Electronics Amplifiers S1-1250 Monoblock Amplifier

S1-1250 Monoblock Amplifier

(6 customer reviews)


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  • Single channel
  • 1260 Watts @ 1 Ohm
  • Class D
  • 1 Ohm stable
  • 4 AWG inputs

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The S1-1250 is a class D mono amp boasting a phenomenal load of almost 1500 watts on 1 ohm at 16 volts. It can drive any two SoundQubed HDS2.2 Series Subwoofers, or any one HDS3.1 or HDS3.2 Series Subwoofers with headroom to spare, so you can feel the bass like it’s midnight on the dance floor.

The S1-1250’s on-board low pass filter will give you precise control over which frequencies you amplify, ensuring maximum fidelity out of your subwoofer amp. The subsonic filter will elongate amp life by reducing extreme distortion-inducing low resonance.

The included clipping indicator on the bass knob makes this the perfect subwoofer amplifier for your HDS2.2 build.

Increasing the loudness of the music, like a double shot of something strong, elevates the intensity of the listening experience. Loud music wakes you up! It enhances emotion, provides you with motivation, and bassy, bodily sensations.

Listeners feel significant, observable changes in mind-body states because loud music is a stronger stimulant than quiet music and deep bass makes us feel good.

The single-channel S1-1250 has 4 gauge set screw power terminals for a clean current flow. 10 gauge speaker terminals ensure your subwoofer maintains optimum sound quality and consistent voltage.

If you need more from your car stereo than this cost-effective jewel provides, the S1-1250 mono amp is strappable for even more dominating bass to drive larger builds!

You’ll have a greater connection to your sound by unlocking the power of low frequencies- Feeling those vibrations in your body deepens the connection to your music.

Don’t waste another morning drive without the power, resonance, and frequency boost that the S1-1250 monoblock will provide your car audio system.

Save money, get more bass. Get your S1-1250 mono amplifier today!

Additional information

Weight 10 lbs
Dimensions 18 × 8 × 3 in

Default Title

6 reviews for S1-1250 Monoblock Amplifier

  1. tdmitch

    AGAIN, I cannot believe that I am the first review on the website but, I’LL TAKE IT.
    Beautifully crafted and designed. The amp I purchased was a refurbished unit but I cannot tell. It looked BRAND NEW to me. Performs very well and stays very cool. I am pushing 4-Infinity 8″ SVC subs @ 1 OHM and this AMP doesn’t miss. I think I could push 4 12″s with this amp (if i wanted).I am a sound quality guy and it does just what I need it to do.

  2. Christopher Wilborn (verified owner)

    Quality is outstanding. Customer service is second to none. The amp i purchased does way more than listed conservatively. Im about to get my speakers from here as well. New Sound Quebed member for life!!

  3. Bill

    Great amp, pushing 2 1200w infinity kappa 12 inch subs at 1ohm for past year and amp has been flawless. 100% happy with this amp, has a good amount of overhead so bass hits great and sound quality is perfect. The bass knob is high quality and clipping light is all I used to set my gains. Price vs performance this 1250 amp is worth it.

  4. Samir Plivac (verified owner)

    Just hooked it up and it is a real beast, only running it at a 4ohm load so it will probably last forever. No doubt in my mind that it slams at the other ratings as well. 10/10

  5. Spencer Hellwich (verified owner)

    This little amp is running stable @ .8ohm on stock alt. Powering an Fi Xv3 12 (1kw rms) with a triple spider. Pushing with ease. Amp runs a little warm but to be expected given the resistance running in this system. Might move to a 4ohm sq build with the hds3.2 15″ to test the SQ. Smooth bass knob is responsive enough for daily driving. The filters work as advertised. Slope isn’t crazy but it does the job. build quality is solid. For under $200 bucks, you get a no frills monoblock.

  6. Christopher Gaddis (verified owner)

    This is a great amp. I have it on two 12″ Rockford P3’s and it delivers. Does every bit of rated power on good electrical, decent sound quality as well. I love that it’s strappable too so I can apply it to bigger setups in the future. This was my first Soundqubed product, and they just gained a new returning customer, I will be back for more of their amps.

Add a review
ClassClass D
Channels1 channel
Working Voltage8.5V to 16 V
Power @ 4 Ohm 14.4V530 Watts RMS
Power @ 2 Ohm 14.4V860 Watts RMS
Power @ 1 Ohm 14.4V1260 Watts RMS
Frequency Response10 Hz - 200 Hz
S/N RatioGreater than 80
Damping FactorGreater than 100
Input Sensitivity5V~0.15V
Subsonic Filter10 - 50 Hz
Low-Pass Filter20Hz - 200 Hz
Dimensions in (LxWxH)11.8 x 7.8 x 2.2

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