motorola dcp501

Bearman said:
Annonymous, can you hook one of those Entech's to a plain old simple computer cdrom drive using the 2 pin connectors on the back of the cd drive?

You should be able to connect the SPDIF out to the coax in on the Entech.

So remind us - how was it? !!😀 !!

theAnonymous1 said:
I really didn't want to give a long drawn out subjective opinion of how it sounded. I believe I said it was as good as any of the other quality Tripath stuff out there and that it was quieter than my AMP1-B's. The only amps I have to compare it to is more Tripath stuff so....

😉:razz:
 
I have been listening to the new set-up using the moto as a pre amp with the T-amp. I checked the volume level of the T-amp and it was set closer to 95% volume! I tried 100% and then 95% again kinda takes the edge off a little, then I tried 98% it may just be about right. interesting stuff.

I'm serious this is GREAT sounding!

I will be ordering a couple of Charlize amps next, and I can't wait to try them out, and also try Charlize with the moto. Should be fun!
 
Tripeth Stock Death or Resurrection?

Whoa, Tripath Stock is showing some signs of life...maybe not yet over? Increased 300% in three days - well, .05/shr to .17/shr.

Too bad. Great product, bad buisness/stock.

Maybe a Cirrus Logic or Texas Instruments buyout? Who else is around that would be interested in Tripath?

Any shareholders out there?
 
Re: TRPH

This has been a wild two days! The Friday open was wild, and continued most of the day, I didn't get a lot of work done in the am on Friday. Up from .05 to .10 on Thursday, we thought it might be a pump and dump. But then it opened at .14 on Friday and closed at .179. News must be close, imo. So just maybe the good doctor my have pulled some sort of deal out out his you know what!

I hope the deal or whatever it is saves the company. I can't wait to see what's up!
 
Anyone else having issues with dying dcp501's?

I have one that won't even turn on (I played it for less than 10 minutes and set it in my basement for a few months).

The other turns on but cannot make any noise through the speakers. (the headphone jack still works).

Anyone have any ideas on what is wrong with these?
 
I figured since this thread got bumped I would post a closeup shot of the DSP board. There is a lot of electrolytic DC blocking going on:dead:. It could be the reason why some don't like the sound.

The bottom right little cluster of stuff is the analog inputs using CS5360.

I have two of these DSP boards if anyone wants them. If not they will end up in the trash. If your good at de-soldering there are some good chips waiting to be put to use.

I also have an extra remote up for grabs.

http://i13.tinypic.com/2cdaf6b.jpg
 
Well, I finally fiished my basement and got around to modding the DCP-501. Took it apart and got the power supply, toroid and amp board out. I did the input cap mod ( a Bennic 2.2uF polypropolene from Madisound replaced the teeny 2.2uF electrolitics), and soldered in the SMD resistors to get around that irratating overload issue. Thanls to AnonymousOne for sending me those resistors...

I didn't really want to do anything else to the amp board and power supply, so the next decision was to either put it all back in the existing case or rehouse. It was late last night and I decided to put all back in the original chassis, since I have another DCP-501 I wanted to rip and rehouse. I elected to keep the crappy spring clips, so I may return to at least upgrade them someday...

The new unit sounds very good. No more overload, and it sounds great. Definitely better than stock. I will keep it just as it is. Not as clear as my Panny XR45/50/55 or my UCD180, but it does have...well, for lack of a better term, body. It's thick, powerful and warm sounding with my modded KEFs and my Maggie MMGs.

Anyway, I will leave the unit as is and rehouse the other one and feed it directly from a DAC. Maybe bridge four to two channels and keep it a high power 2 channel amp. Without all the upstream junk (which really doesn't sound That bad), i anticipate the standalone Ampboard fed by the DAC to sound even better.

For $70, it was a steal. Up there with the $19 T-amp I bought...

More later on the other Amp..
 
john65b said:
Well, I finally fiished my basement and got around to modding the DCP-501. Took it apart and got the power supply, toroid and amp board out. I did the input cap mod ( a Bennic 2.2uF polypropolene from Madisound replaced the teeny 2.2uF electrolitics), and soldered in the SMD resistors to get around that irratating overload issue. Thanls to AnonymousOne for sending me those resistors...

I didn't really want to do anything else to the amp board and power supply, so the next decision was to either put it all back in the existing case or rehouse. It was late last night and I decided to put all back in the original chassis, since I have another DCP-501 I wanted to rip and rehouse. I elected to keep the crappy spring clips, so I may return to at least upgrade them someday...

The new unit sounds very good. No more overload, and it sounds great. Definitely better than stock. I will keep it just as it is. Not as clear as my Panny XR45/50/55 or my UCD180, but it does have...well, for lack of a better term, body. It's thick, powerful and warm sounding with my modded KEFs and my Maggie MMGs.

Anyway, I will leave the unit as is and rehouse the other one and feed it directly from a DAC. Maybe bridge four to two channels and keep it a high power 2 channel amp. Without all the upstream junk (which really doesn't sound That bad), i anticipate the standalone Ampboard fed by the DAC to sound even better.

For $70, it was a steal. Up there with the $19 T-amp I bought...

More later on the other Amp..

It will definitely sound better with a good DAC.

The DAC board of the 501 that I posted above is full of cheapy electrolytics that ALL of the signals in the unit pass through.:dead:

I still havn't done much to my stripped units yet do to lack of time and money. The amp board I'm using now is just sitting on top of my HTPC all naked.

I'm trying to save up for some 1.5KVA transformers to unleash this boards full potential. I would REALLY like two SPS80 switching supplies but they are way out of my price range at nearly $300 each.
 

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AnonymousOne,

What are you driving/plan on driving with these amp boards? Can't imagine relatively efficient speakers driven by these amps with a 1.5KVA Trannie...needing some seious power, huh?

I should be tearing into the other receiver later tonight...
 
john65b said:
AnonymousOne,

What are you driving/plan on driving with these amp boards? Can't imagine relatively efficient speakers driven by these amps with a 1.5KVA Trannie...needing some seious power, huh?

I should be tearing into the other receiver later tonight...

Actually no, I don't "need" all that power.😀

This is going to be my permanent main setup so I want it to "be all it can be". Having all that headroom and knowing I will never be playing anywhere near clipping will be nice.

The setup.......

Amp 1: 4-channels bi-amping my yet to be bought Silver Iris combo.

Amp 2: 4-channels each powering one 15" driver in a Ripole configuration.

Front end: HTPC with SBAudigy + kxdrivers -> 3 Entech DAC's.

It will probably be another year or so before I can afford/complete everything. I need about $1,000 to buy the remaining pieces.
 
theAnonymous1 said:


It will definitely sound better with a good DAC.

The DAC board of the 501 that I posted above is full of cheapy electrolytics that ALL of the signals in the unit pass through.:dead:

I still havn't done much to my stripped units yet do to lack of time and money. The amp board I'm using now is just sitting on top of my HTPC all naked.

I'm trying to save up for some 1.5KVA transformers to unleash this boards full potential. I would REALLY like two SPS80 switching supplies but they are way out of my price range at nearly $300 each.


Are only the 2 boards shown and the torroid necessary to be used as the amplifier? I had one that died 2 days after use and I'm trying to strip it down to the bare minimums to see if I can get it working.
 
XDVD said:



Are only the 2 boards shown and the torroid necessary to be used as the amplifier? I had one that died 2 days after use and I'm trying to strip it down to the bare minimums to see if I can get it working.

Yes, just the stuff in the pic is needed.

The board needs to be wired up a specific way to power on and work correctly. When you get to that point; if you need help I'll draw up a pic of how I have mine and post it for you.
 
Hey Ananymous1, you mentioned you modded the Entech Number Cruncher - bypassed the filter I think - can you give a little push in the right direction?


I am liking this Entech more and more every day...the CS8412/CS4329 combo is definitely better than the CS8414/TDA1543 setup - even if the TDA1543 has a better receiver...
 
john65b said:
Hey Ananymous1, you mentioned you modded the Entech Number Cruncher - bypassed the filter I think - can you give a little push in the right direction?


I am liking this Entech more and more every day...the CS8412/CS4329 combo is definitely better than the CS8414/TDA1543 setup - even if the TDA1543 has a better receiver...

I did the "Monkey filter" mod and built new power supplies.

The filter can be found in this thread; post #7......

http://www.diyaudio.com/forums/showthread.php?s=&threadid=68644&highlight=monkey+filter

Here is a pic of the board with new filter components and sitting next to a new supply.....

http://i13.tinypic.com/2hdsdco.jpg

I don't know if you have noticed, but when there is no digital signal there is quite a bit of noise on the output of the DAC. I plan on using the small relay in the pic to disconect the output of the DAC and short the input of the amp its connected to when there is no signal locked.

If you would like, I can send you the 2 caps and 1 resister needed for the filter. I have extras I don't plan on using for anything.
 
john65b said:
Did it have an impact?

I will take you up on your offer...

:scratch:.... errrrrrm, I dunno. I didn't really bother comparing before and after. It was only a few cents worth of parts and others claim it made a difference, so I figured what the heck, I'll do it.

I still have your address from before, so I'll send the parts out today.
 
I'm a newbie here, and have been looking for a class d multichannel amp for a long time. This really looks like an ideal way to get one inexpensively.

I plan to use an Auzentech X-Meridian soundcard as the preamp for my home theater PC. For those that have done it, how difficult was it to pull the amp and power supply out of the DCP-501 and re-case it? My electronics design skills are non-existant, but my electronic assembly and soldering skills are excellent so I hope I'd be up to the task (with you guys help, hopefully😱 ).

What are the pitfalls of doing this? And finally, if you had to do it again - would it be worth it or would you have gone a different route?

Thanks!

-PGPfan
 
For me the hard part was extracting the amp & board out without damaging anything else in the chassis, and also bending back the transistor connectors to get the heatsink back far enough to solder the overload resistors in ...

You must also remember to connect 5V to the three input header pins as Anonymous has said in a past email, otherwise the unit will not work. There is a vacant 5V and 12V supply header on the power board you can connect these three connections to...

I have another yet untouched DCP-501 I will be tearing into next week and putting it into another chassis (an non-operating Parasound HCA-100 Chassis to match my Parasound Preamp).
 
The hardest part is just getting the parts out of the unit. Lots of screws to remove.

What are the pitfalls of doing this? And finally, if you had to do it again - would it be worth it or would you have gone a different route

The only pitfall I can think of is if you accidentally break something; but that goes for any project.

I don't regret buying these amps at all. I only regret I didn't buy more at the price they were going for.

BTW, I sent out those parts yesterday John.
 
Anonymous1 -> Thanks for sending this parts - still have a few of those SMD resistors you sent - should be soldering another DCP-501 amp board up as soon as I have the time...

Hey those Entech DACs are now going for over $80 each if you can even find them on ebay. Can't believe you got three for $100.

The Entechs were 20 bit DACs with CS8412 receiver and CS4329 chip, but I found a 24 bit DAC with CS8416 receiver and CS4397 Chip from Hong Kong for $60. Still awaiting shipment, but interested in seeing how she sounds compared to the Entech...the CS8416/CS4397 combo is relatively state of the art as far as new DACs are concerned (methinks)