It’s been a long time since I’ve seen my Pioneer A-717 amp. This was my pride and joy that I bought in High School while working at a stereo shop back in 89′ I used it all during college and when I moved out on my own after college. When I got my Elite components I put it in storage about 10 years ago when I simply had no space to set it up, but last night I decided its time to check up on it and to get it ready for a local audio group gathering in a few weeks. Plans are to compare it to an earlier Pioneer SA-9500 which is one heck of nice Integrated amp in its own right.
So last night I spent some time with mine checking to see if it all worked ok and to clean it off a bit. Thankfully it was fine since I stored it in its original box. However, I took the cover off to dust out the inside a bit, because when I put it away the last time, I hadn’t taken the cover off to do any cleaning on it in probably 7 years prior that. The front face was fine, but in the photos below I need to work on getting dust out of the notches at the top of each control. Last time I did that took an hour with a cotton swab.
Anyway, after cleaning the inside up, I put it up on the bench to do some tests and this is what she’s still able to do 🙂
Using a Scope and Signal Generator to monitor all this….
Input 600hz 1v peak to peak
dummy Load 4 ohm
measured output before clipping 72v peak to peak
Peak output voltage 72v/2 = 35v
RMS output voltage 35/sqr2=25v
Output Power in Watts = 25×25/4 ohm load = 156 Watts at 600 hz
Not bad considering the manual states 140 watts from 20 to 20khz and 150 watts at 1khz
Lucky for me, no Caps got warm during the initial turn on. I was really worried about having issues with the Capacitors sitting around for so long. Other then that I’m looking forward to our little face off with the SA-9500 in a few weeks with another enthusiast. This should be fun.
Here’s a nice Inside view. Notice the direct connect shaft to the volume control. The two black tubes below that are the flexible flat steel mechanisms that slide the Tape Record selector and Input Selector switch inside that Honeycomb box on the right side. All low voltage signal paths are inside that box, thus reducing noise from the high voltage power amp signals
Here’s a rear view of the amp connections…. I need to find my jumper cables for the adapter output. Just remembered that
I’ve held on to the original box since I bought this new in 1989. Still has my name addressed on one side as I ordered this direct from Pioneer through there employee purchase program back then.
And finally a nice front shot of the unit