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I have one of the d912k's, bought it a while back while I was still in school. I now have a Spectron MIII MKII SE. I like the Spectron better in all areas when it replaced my Red Wine amps, I also tried the d912k for kicks to see if it lived up to Gedde's thoughts on it, I thought it sounded fine but the Spectron was noticeably more transparent, especially in the highs. I'll do another back to back comparison when I have time, the d912k is currently in my HT setup.
Quote from: IronLion on 17 Jun 2009, 07:23 pmI have one of the d912k's, bought it a while back while I was still in school. I now have a Spectron MIII MKII SE. I like the Spectron better in all areas when it replaced my Red Wine amps, I also tried the d912k for kicks to see if it lived up to Gedde's thoughts on it, I thought it sounded fine but the Spectron was noticeably more transparent, especially in the highs. I'll do another back to back comparison when I have time, the d912k is currently in my HT setup.I've been repeating this over & over & here it is again:The 912 is rated only for 8 Ohm loads. The farther below 8 Ohms is the load the worse will sound the 912. Comparing the 912 on a difficult load to any amp w/ four or five times the current capability is purely misleading for the purpose of this thread.The 912 is a 100W amp rated at 8 Ohms ONLY. Check the speaker load. The farther it strays from 8 Ohms flat the worse will sound the 912. In fact, it's not rated to drive less than 8 Ohms. I suppose the speaker must be quite an easy load for the 912 to work as a power amp/integrated. For systems w/ too-difficult a speaker load, the only known use for the 912 would be as a preamp. BUT THERE IS ONLY A SUM TOTAL ONE PURE ANALOG INPUT, BEING LABELED "DVD 7.1" requiring an external switchbox for multiple analog inputs. One can easily imagine that no one would ever consider using the 912 as a high end preamp in a well thought out system above average in cost. It doesn't fit in cosmetics or gestalt in any way. Yet, it would apparently make a great performing preamp as long as the amp was no more difficult a load vs. the SA-50 mk3. It might even work well as a preamp driving a more difficult load, but that's the only amp I drove w/ it, so it's the only one I can speak to. I doubt the manual quotes the output impedance of the pre outs. If you wanted to use the 912 as a pre driving a difficult amp load, I'd suggest at least trying it. If the pre outs didn't sound right, I'd try driving the external power amp w/ the speaker outs of the 912 through a 9k series resistor then a 1k parallel resistor (1/8 w OK) at the input to the external power amp.
What do you think is the 912s power output at 4-Ohms? Just curious. Also, my coming speakers will be 16 Ohm but they will be bipolar meaning about +3 dB sensitivity & double the power handling. What is the 912s estimate max output into 16 Ohms?
Maybe you should be specific about your complaint. What's extroardinary? That two amps are of similar design schematic? If so, are you serious?
owner and service manuals can be found at:http://www.hifiengine.com/Looks like the PAC011A amplifier modules are also used in these models:Pioneer VSX-D209Pioneer VSX-D409Pioneer VSX-D414Pioneer VSX-D509Pioneer VSX-D510Pioneer VSX-D511Pioneer VSX-D514Pioneer VSX-D710Pioneer VSX-D712Pioneer VSX-D714Pioneer VSX-D810Pioneer VSX-D811Pioneer VSX-D812Pioneer VSX-D814Pioneer VSX-D912
I've also been thinking of buying a Dr. Geddes type receiver to try. I"m very curious!What would I do with all that money though.....???? Stress free and inexpensive to operate. No power conditioner.
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