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Discover our SIQ amplifiers: a blend of Hi-Fi class A/B & D backed by 25+ years of audiophile expertise. Boasting top-tier components for crystal-clear sound, we offer these gems directly to you for exceptional value. Experience pristine power, from SIQ 75.4 to the robust SIQ 3000 D.
Hi-Fi class A/B and class D amplifiers are back with our SIQ amplifiers. Full bandwidth, zero filters, discrete gain knob per channel, zero crossovers, zero EQ. Purity at its finest. Being avid audiophiles for over 25 years we have always appreciated the finer performing amplifiers in mobile audio and with our growing presence in the mobile audio industry, we have been able to team up with talented amplifier engineers and finally produce our own hi-fi amplifiers. Audiophile components were used throughout construction and engineering to bring our amplifiers to fruition. And because we are a direct company (no dealers) the cost savings are passed directly to you, our customers.
All of our SIQ class A/B amplifiers utilize audiophile-grade T0-3 output transistors, clean board layouts, thick extruded aluminum chassis, copper anodized shielded transformer covers, and a large plexiglass viewing window. Coming inward we use UPC4570 op-amps followed by IRFPO64N power supply transistors, sand cast resistors, surface mount parts to save board space, and Tiffany-style RCA connections. All of the above FR and power graphs are from Audio Precision measurements.
Frequency Response Minimum | 5 Hz |
Frequency Response Maximum | 150,000 Hz |
Signal-to-Noise Ratio (SNR) | 92 dB |
Total Harmonic Distortion (THD) | 0.03 % |
Dimensions (W x H x D) | 14 x 8 x 2 Inches |
Rated RMS power output into 2 channels at 4 ohm | 200 Watts |
Rated RMS power output into 2 channels at 2 ohm | 400 Watts |
Bridged RMS power into 1 channel at 4 ohm | 800 Watts |
RCA Input Maximum | 16 Volts |
Idle Current Draw | 1.3 amps |
Maximum Current Draw | 85.6 amps |
Aaron –
I’m running a 3 way component set using passive crossovers.{In a pickup truck} I had them on a Rockford Fosgate 125 x 2 at 4ohms, no issues with the amp it’s just getting old. I came across a youtube video from Williston audio labs, he tested the 200.4 and was pleased. So I decided to replace my Rockford with a 200.2. I set the gains to deliver 180 watts at full power, I can’t even get to full volume it’s SO LOUD and absolutely crystal clear and my truck sounds so much better than it ever has. I’m blown away and extremely happy with my purchase. THANK YOU Stereo Integrity and THANK YOU Williston audio labs.