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SQ4.1 Class A/B 4/3/2 Channel Bridgeable Stereo 12v Power Amplifier With DSP & PC Software Control 440w Verified RMS Power Output

World RRP: £390.99


Product code: SQ4.1

Featuring a Class A/B Amplifier section with hand selected transistors and circuit design to satisfy the most discerning audiophile the SQ4.1 has the ability to deliver the most refined and detailed sound, with breathtaking dynamics and accuracy. The SQ4.1 is also a fully equipped processor as well as a top of the line amplifier. A power output of 200w RMS per channel at 4ohms permits delivery of power to almost any car audio speaker currently on the market. Although primarily designed to be used as a four way speaker amplifier running either coaxial or component speakers, the amp can also be bridged to sensibly sized subwoofers or mid woofers (4ohm) When paired with the SQ1.1 monoblock subwoofer amplifier, it provides the heart of a truly unique and powerful amplified system. The Bassface SQ series of amplifiers are the next generation amplifier solution for the car audio market, created with professional installers and audio enthusiasts in mind – moving to digital provides completely repeatable adjustments and perfect accuracy, as well as on the fly adjustment and storage/recall of settings. Equalizer: Full 31 band graphic equaliser with adjustable Q factor and .1db increments of level adjustment – independent for every single channel on the amplifier. Compares to hit and miss analogue sliders or limited source unit EQ’s with less than 10 bands of equalisation even on the very best head units. Crossover: Selectable full range/high pass/low pass/band-pass digital crossover with selectable slope up to 24 db/octave and at an incredible resolution of 1Hz! Allows optimal setup even for advanced 3 way speaker systems with band-passed mid range or mid-bass speakers. Time Delay: Each channel also has programmable time delay to equalise the sound arrival time at the drivers ears from each speaker and to minimise the impact of poor factory speaker positioning, maximising the quality of the sound imaging and staging. On the PC software the delay is selectable in cm or inches as well as milliseconds making data input a cinch (SQC.1 time delay in milliseconds only) Control: Programming is via either the (free to customers) Windows PC software or the (cost option) SQC.1 handheld programmer, depending on operator preference. With SQC.1 it is possible to have up to 2 amplifiers plugged in at once, permitting full system control from one programmer which could even be installed in the cabin at the driver’s fingertips. This is especially useful when taking advantage of the 5 system sound presets (per amplifier). The PC software is comprehensive and very nicely designed to allow user friendly control of all functions. The SQ amps are built into a chassis made from an alloy with an exceptional density – this provides excellent heat sink performance. It is very heavy and beautifully finished with a gun metal colour anodise. RCA terminals are ring bolted and the gold plated power and speaker terminals are all conveniently recessed on one side of the chassis for easy and neat installation.

Technical Highlights

  • 31 Band graphic EQ per channel - +/- 20db variable Q
  • Full Control – Control Any DSP Feature
  • Blue Illumination
  • 30 Second Illumination Time Out
  • 5 Non Volatile Programmable User Data Presets
  • Optimised Transistor Matching for Enriched Tonal Balance
  • Super Heavy Duty Heatsink Chassis
  • 24 Carat Gold Plated Terminals
  • Heavy Duty bolted RCA inputs
  • THD @ 30% Power 4 Ohm - <0.03
  • TDOS Protection Circuitry
  • 0.2-6V Ready Pre-Amp Stage
  • White Illuminated Logo Panel



What's In The Box?

  • 1 x High Power 4 Channel DSP Amplifier
  • 4 x Self Tapping Screws
  • 2 x 35 Amp Spare Fuses
  • 1 x 1.5m USB Connecting Lead
What's In The Box?

Version History

The SQ series were a bit ahead of their time, and ours. Prototyping gave us exactly what we wanted but the technology involved is so exotic it really priced these out of the cost of market we were in. V1 – Production limited to approximately 200 pieces, worldwide. Marked as discontinued 13 March 2019. Product suppert ended 13 March 2021.

Key Facts

Product Category Amplifiers
Version 1
Series Classic
First Added 19/08/2016
Last Modified 13/03/2021
Barcode 617529407205
Production Status Discontinued
Product Net Weight (g) (For Pairs/Sets/Major Parts) 4260
Product Height (mm) 65
Product Length (mm) 315
Product Width (mm) 225
Complete Product Pack Weight (g) 4560
Warranty (Months) - Private Enjoyment Use Only 12
Sold As Single

Related products

Amplifier Data

Genuine Useable RMS Power, 4Ohm (Watts), < 1%THD, 14v 80x4
Genuine Useable RMS Power, 2Ohm (Watts), < 1%THD, 14v 110x4
Genuine Useable RMS Power, 4Ohm Bridge (Watts), < 1%THD, 14v 210x2
Frequency Response (Hz) 20hz-20khz
THD Continuous 4 Ohm 1Khz/100Hz (%) <0.5%
Signal To Noise Ratio (db) >100dB
LPF (Hz) 0-20khz
HPF (Hz) 0-20khz
Bass Boost (Db) 0-20dB
Boost Frequency (Hz) 0-20khz
Subsonic Filter (Hz) 0-20khz
Audio Signal Input Voltage (V) 0.2-6v
LPF Slope (Db/Oct) 12/24dB
HPF Slope (Db/Oct) 12/24dB
Subsonic Filter Slope (Db/Oct) 12/24dB
Amplifier Topology Class A/B
Fuse Rating (Amps) 70
Power Wire Input Gauge (AWG) 4
Recommended Wiring Kit and Accessories PWK4.1 RCA5.1
Minimum Recommend Final Load Per Channel (Ohms) 4

Extended Amplifier Data

Verified RMS 14.4V Per Channel 4Ohm (Watts)@(THD), (Amps), (Version) 72@0.1% (V1)
Verified RMS 14.4V Per Channel 2Ohm (Watts)@(THD), (Amps), (Version) 103@0.1% (V1)
Verified RMS 14.4V Bridge 4Ohm (Watts)@(THD), (Amps), (Version) 205@0.1% (V1)
Verified RMS 13.8V Per Channel 4Ohm (Watts)@(THD), (Amps), (Version) 67@0.1% (V1)
Verified RMS 13.8V Per Channel 2Ohm (Watts)@(THD), (Amps), (Version) 94@0.1% (V1)
Verified RMS 13.8V Bridge 4Ohm (Watts)@(THD), (Amps), (Version) 188@0.1% (V1)
Verified RMS 12.5V Per Channel 4Ohm (Watts)@(THD), (Amps), (Version) 53@0.1% (V1)
Verified RMS 12.5V Per Channel 2Ohm (Watts)@(THD), (Amps), (Version) 80@0.1% (V1)
Verified RMS 12.5V Bridge 4Ohm (Watts)@(THD), (Amps), (Version) 161@0.1%, (V1)