I found this review of the Oppo player being discussed here, and don't know how accurate it might be, but thought it interesting. Would it be plausible to replace the opamps and caps in one of these and have a really good CDP? It looks as though the average selling price is around $66.00 and for a player that will play vertually anyformat, and can be "fixed" to play DVD's from any region, it may well be worth looking into. Has anyone takend one of these dwon and done any work on one? What do you think, and would it be worth the trouble?
This Oppo player is a non-Blu-Ray, but just about everything else player it does SACD's which most other DVD and other stuff players won't do. It also effectively doubles your on screen resolution through the use of: upscaling. One problem with the Oppo players in general is they are built to a price-point. In other words, they have a fixed cost for the "expensive" chips used in the circuitry, and to comply with the penny-pinching middle-management types as they tend to skimp on anything which doesn't show.
If you compare the DV-981HD (list price $229.) inside with the Oppo BDP-83 (list price $500.) the DV-981HD power supply is much simpler. The DV-981HD uses one 3-terminal regulator and several cheap under-rated zener diodes, while the BDP-83 is chock full of 3 terminal regulators, five or six of them mounted on heat sinks.
Another place where Oppo tends to go cheap is the Capacitors and Op-Amps in both the Power Supply, and in the audio section. This means that the DV-981HD and other similar older Oppo products (DV-970, DV-980, etc.) will start to fail after about one, or two years past the warranty period.
In the Audio section, I noted that the input and output caps for the six audio channels were all capacitors of the same value, voltage and type. I thought this extremely odd, as usually a typical value for the input cap of an IC Op-Amp would be between 1uF. and 10uF. and the output cap going to the outside world, typically would be: 100uF or maybe 220uF. Well Oppo uses 12 caps of 47uF./16 Volts for all the audio sections, which I'm sure compromises the Bass Response in both of the Stereo Channels and the Subwoofer on the 5.1 channel outputs. The same thing is seen in the Power Supply, not the best caps, but some cheap caps - seen in several places. So Oppo saved a few pennies on caps for sure!
All the Output dual Op Amps in the DV-981HD are Fairchild 4558's, a decent but rather cheap Op Amp, used on cheap consumer equipment, and costing well under 20 cents each in large quantities. Since the near-best of the best dual Op Amps are around $1.20 in production quantities, even with mediocre caps, the sound could have been the best it could be -- if Oppo had spent another two dollars, making those two of the three parts used top-notch.
There are also mechanical shortcuts, the three motors used in the disc loader and DVD mechanism, seem to be similar and from the same supplier. That might be fine for the disc load and slide motors which get relatively little use, but the spindle motor which likely approaches spinning a half a million times a day - tends to wear out, according to Oppo Technical Support.
So, the DV-981HD is a nice sounding, above average video-wise all disc player (except Blu-ray) but which won't sound quite as good as the higher priced Oppo's or anything not made to a stingy price point. Bearing in mind that the DV-970HD, DV-980HD, and DV-981HD tend to wear out after about 3 years use, those who know are currently selling them before the sets start to exhibit symptoms. Considering that these were primarily manufactured in 2006 and 2007, around 100% of sets soon will be dying, either now, or later in 2011 from both electrical and mechanical problems.
Definitely worth considering at prices UNDER fifty bucks, as Oppo will repair it for a flat fee of $50. plus bothways shipping (figure ~$90. total) and then you have an above average DVD/SACD/CD player which should be running good for another three or four years.