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SIQ 75.4 (Class A/B)
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…
Description
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.
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MIrageB. –
So far I have only purchased the SIQ-75.4, but I plan to build my next front 3-way setup plus a subwoofer on SI components, in general, everything on SI components except the DSP.
What can I say about SIQ-75.4? This is a great-sounding amplifier that can accurately and reliably amplify a signal without introducing any distortion or embellishment to the sound. Built on audiophile components and with competent circuit design. Made from thick aluminum alloy, which means cooling should be fine, although it is always better to use additional cooling depending on the installation. Great looks. Probably the best price/quality ratio in terms of sound quality out of many car amplifiers I have listened to.
I highly recommend it to those who value sound quality.
Steve Schwartz –
I don’t usually take sides in the class/topology wars as I generally think that you get good sound from well designed somewhat pricier amplifiers, regardless of topology. I put this side by side with a very good Focal FDP 600.4 and a Soundigital GaNFET 2000.8 and still walked away preferring the sparkle of this SIQ 75.4 amp – Very pleased indeed.