Philips CD650 or CD473?

homer09 · 2nd May 2004, 08:29 PM

I currently have a functional CD473 with a CDM2 tranport and tda1541 DAC. I also have a CD650 (same transport/DAC) which isnt working, probably the tranport is at fault. Since the parts inside both players are very similar, i will probably be able to salvage either player.

Now, my goal is tweak one player (non-oversampling, caps, clock, etc). Which is the better player to build from? Which one is the better model, which has the most potential?

TDA1540 · 2nd May 2004, 09:24 PM

650 has a good groundplane even under parts,nice small pcb.
The 473,for me, is a long time ago.I think it has one large pcb,that reaches under the cdm,but judging the time it was made,it probably has lots of holes in the groundplane.

given the fact the 473 still works,I would go ahead with that one.

homer09 · 2nd May 2004, 09:27 PM

You are totally right, the 650 is made up of a couple of small neat PCBs. the 473 is in fact a large pcb that reaches under the transport.
So, if i understood correctly, the 650 is the newer and better model?

TDA1540 · 2nd May 2004, 09:51 PM

oh no!
It is older!

homer09 · 2nd May 2004, 09:52 PM

so the 650 is older, but is it better?

Bernhard · 2nd May 2004, 09:59 PM

1541 is not good for non os.

Lots of strong odd order harmonics. Better get a 1541A for that.

If 473 has LM833 and 650 got NE5532, I would go for 650.

TDA1540 · 2nd May 2004, 10:02 PM

again,I can hardly remember the473 I once had,so without a picture of the pcb I can't answer.

The weakness of the 650 is in the interaction with the cdmboard.
The weakness of the 473 is the probable inconsistent use of the groundplane.

The rest can be solved.

650 has an extra filterboard,practical with nonOS

TDA1540 · 2nd May 2004, 10:03 PM

perhaps the 473 is equipped with motorolas!

homer09 · 2nd May 2004, 10:10 PM

my 650 already has a non oversampling mod done to it, as suggested by an italian site which seems to have disappeared...

so i should use the extra filtered outputs with my 650 since it is non oversampled?

What other mods should i do to it? It currently already boasts better opamps and some better electrolytes.

I was thinking about taping the i2s output from the CDM-2 instead of spidf. Is that a good idea, and how do i do it?

what other mods is this player dying for?

homer09 · 2nd May 2004, 10:13 PM

Quote:

Originally posted by TDA1540
perhaps the 473 is equipped with motorolas!

where? is this good or bad?

2nd May 2004, 08:29 PM	#1
homer09 diyAudio Member Join Date: Jan 2004 Location: Montreal	Philips CD650 or CD473? I currently have a functional CD473 with a CDM2 tranport and tda1541 DAC. I also have a CD650 (same transport/DAC) which isnt working, probably the tranport is at fault. Since the parts inside both players are very similar, i will probably be able to salvage either player. Now, my goal is tweak one player (non-oversampling, caps, clock, etc). Which is the better player to build from? Which one is the better model, which has the most potential?

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2nd May 2004, 09:24 PM	#2
TDA1540 diyAudio Member Join Date: Feb 2004 Location: Ehv	650 has a good groundplane even under parts,nice small pcb. The 473,for me, is a long time ago.I think it has one large pcb,that reaches under the cdm,but judging the time it was made,it probably has lots of holes in the groundplane. given the fact the 473 still works,I would go ahead with that one.

2nd May 2004, 09:27 PM	#3
homer09 diyAudio Member Join Date: Jan 2004 Location: Montreal	You are totally right, the 650 is made up of a couple of small neat PCBs. the 473 is in fact a large pcb that reaches under the transport. So, if i understood correctly, the 650 is the newer and better model?

2nd May 2004, 09:51 PM	#4
TDA1540 diyAudio Member Join Date: Feb 2004 Location: Ehv	oh no! It is older!

2nd May 2004, 09:52 PM	#5
homer09 diyAudio Member Join Date: Jan 2004 Location: Montreal	so the 650 is older, but is it better?

2nd May 2004, 09:59 PM	#6
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	1541 is not good for non os. Lots of strong odd order harmonics. Better get a 1541A for that. If 473 has LM833 and 650 got NE5532, I would go for 650.

2nd May 2004, 10:02 PM	#7
TDA1540 diyAudio Member Join Date: Feb 2004 Location: Ehv	again,I can hardly remember the473 I once had,so without a picture of the pcb I can't answer. The weakness of the 650 is in the interaction with the cdmboard. The weakness of the 473 is the probable inconsistent use of the groundplane. The rest can be solved. 650 has an extra filterboard,practical with nonOS

2nd May 2004, 10:03 PM	#8
TDA1540 diyAudio Member Join Date: Feb 2004 Location: Ehv	perhaps the 473 is equipped with motorolas!

2nd May 2004, 10:10 PM	#9
homer09 diyAudio Member Join Date: Jan 2004 Location: Montreal	my 650 already has a non oversampling mod done to it, as suggested by an italian site which seems to have disappeared... so i should use the extra filtered outputs with my 650 since it is non oversampled? What other mods should i do to it? It currently already boasts better opamps and some better electrolytes. I was thinking about taping the i2s output from the CDM-2 instead of spidf. Is that a good idea, and how do i do it? what other mods is this player dying for?

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