S1-1250 S Series Monoblock Amplifier


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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!


Model S1-1250
Class Class D
Channels 1 channel
Working Voltage 8.5V to 16 V
Power @ 4 Ohm 14.4V 530 Watts RMS
Power @ 2 Ohm 14.4V 860 Watts RMS
Power @ 1 Ohm 14.4V 1260 Watts RMS
Frequency Response 10 Hz - 200 Hz
S/N Ratio Greater than 80
Damping Factor Greater than 100
Input Sensitivity 5V~0.15V
Subsonic Filter 10 - 50 Hz
Low-Pass Filter 20Hz - 200 Hz
Dimensions in (LxWxH) 11.8 x 7.8 x 2.2
SoundQubed warrants all products to be free from defects in materials and workmanship for normal use and service for a period of time not to exceed 12 months for subwoofers, components, earbuds and coaxial and 12 months for amplifiers from the original date of retail purchase. Parts returned must be determined by SoundQubed to be defective prior to any warranty credit or replacement is issued. SoundQubed’s obligation under warranty shall be limited to repairing or replacing, at its discretion, any part proven defective. The customer must prepay transportation charges. Final determination of the suitability of the products for the use contemplated by the buyer is the sole responsibility of the buyer. Warranties are non transferable. Warranty Exclusions Burnt or open coils Customer abuse or competition use and power in excess of rating Amplifiers used in competition or run below rated ohm loads or voltage Improper wiring, including size/gauge, paths, termination method, and series/parallel configuration SoundQubed shall not be liable for any special, direct, indirect, incidental or consequential damages that might be claimed as a result of the failure of any part, including claims for delay, loss of profits, or labor SoundQubed shall not be liable for any damages or injuries to persons or property resulting from improper installation or misuse of any part subject to this warranty