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Was A Great Buy, now DEAD..review originally written
on February 13, 2011
Today is June 20, 2012, Below is the initial review I wrote for the Dayton Audi SA70 Subwoofer Amplifier. Today the amplifier is dead as dead can be. I got one year and a few month's use. The cost and time of repair would exceed replacement cost. I will avoid Parts Express's house brand, Dayton Audio in the future.
I have two audio systems in my home, one is a 5.1 system; the other stereo. The 5.1 system, which I built for Blu-ray on a Sony 500 watt RMS foundation, for theater surround sound has a Polk 100 watt 12" subwoofer. It's nice and while it wasn't super high-end audiophile gear, it wasn't cheap.
For the stereo system in my bedroom, I decided I "needed" more bass response than what I was getting from my Polk monitors. Already on hand, I had a 12" Pioneer woofer that was purchased some time ago for use in an automobile. Those auto woofers generally require relatively smaller cabinets than for home audio use. And I had a remnant cabinet of a Samsung woofer from a 5.1 system from an old computer. I'd planned on powering the cobbled together powered subwoofer by using a Pyle PCA3, 75 watt stereo amplifier, but after reading the true specs on the Pyle, it became clear that it was 75 watts PEAK power, only 15 watts RMS, with relatively high distortion characteristics. I keyed "subwoofer amplifier" into Amazon's search engine and it took me directly to the Dayton Audio SA70 70W Subwoofer Amplifier. Using the template from the Pioneer woofer's instructions and making one from the rear of the Dayton Audio SA70 70W Subwoofer Amplifier, I made the proper cutouts in the Samsung cabinet. Then I wired and installed the woofer and subwoofer amplifier. It was a nice clean installation that took less than an hour. I did reduce the free space inside the cabinet with audio acoustical foam. Wired up, this Rube Goldberg subwoofer sounds better to my 66-year-old ears than my Polk.
I suppose that I should add that I've been a licensed broadcast engineer since 1974, so this design and installation may have appeared to be a bit easier than it may be for those who haven't previously worked with audio gear. It was easy. In fact, it took me more time to get my scroll saw properly working than to make the cutouts for the woofer and amp.