Today I was given a brand new cheapie AUS $200 MAKASU DVD-3000A DVD player.
After an hours listening the lid came off and I fitted better quality (2) op-amp supply bypassing and (2) audio output coupling capacitors (Nichicon smps electros) plus 0.1 mFd smd ceramic cap across each new cap.
This I did as a first change before more listening and further mods.
The smd op-amps are 4558 (drop in suggestions ?) so they will likely change, as will more caps.
The result is firmer bottoms and sweeter highs, and overall nicer.
Not too bad really, but maybe it needs a better master clock.
I need to do a back comparison tomorrow to see how it stacks up pleasantness and dynamics and detail wise with respect to my reference souped up old heavy solid Philips player and my factory bog standard (this is deliberate) Marantz CD-46, but certainly before and after mod sounds are different.
I had a close look, and the DA Convertor is an smd 28 pin Wolfson WM8746 containing 3 stereo DA convertors with a bunch of interesting features.
Some features run under pin select stand alone operation, more extensive are under external system uP control (PIC and lcd ?)
These features include interesting things like multiple sample rates and word lenghts, multiple serial data formats, polarity flip for each pair of channels, volume control down to -127.5 dB in 0.5 dB steps for all channels together or individually with zero crossing detection, and the ability to switch each of the three stereo pairs into stereo/reverse/L only/R only/L 2 ch mono/R 2 ch mono/L+R 2 ch mono modes ala old hifi amps, and some intelligent muting functions.
I have no idea of prices or availabilities, but it seems like a most usefull device for stereo or surround systems.
Anybody have experience of this chip ?.
Regards, Eric.
After an hours listening the lid came off and I fitted better quality (2) op-amp supply bypassing and (2) audio output coupling capacitors (Nichicon smps electros) plus 0.1 mFd smd ceramic cap across each new cap.
This I did as a first change before more listening and further mods.
The smd op-amps are 4558 (drop in suggestions ?) so they will likely change, as will more caps.
The result is firmer bottoms and sweeter highs, and overall nicer.
Not too bad really, but maybe it needs a better master clock.
I need to do a back comparison tomorrow to see how it stacks up pleasantness and dynamics and detail wise with respect to my reference souped up old heavy solid Philips player and my factory bog standard (this is deliberate) Marantz CD-46, but certainly before and after mod sounds are different.
I had a close look, and the DA Convertor is an smd 28 pin Wolfson WM8746 containing 3 stereo DA convertors with a bunch of interesting features.
Some features run under pin select stand alone operation, more extensive are under external system uP control (PIC and lcd ?)
These features include interesting things like multiple sample rates and word lenghts, multiple serial data formats, polarity flip for each pair of channels, volume control down to -127.5 dB in 0.5 dB steps for all channels together or individually with zero crossing detection, and the ability to switch each of the three stereo pairs into stereo/reverse/L only/R only/L 2 ch mono/R 2 ch mono/L+R 2 ch mono modes ala old hifi amps, and some intelligent muting functions.
I have no idea of prices or availabilities, but it seems like a most usefull device for stereo or surround systems.
Anybody have experience of this chip ?.
Regards, Eric.
