Marantz 250 Large Capacitors

Retroman98

Retroman98

AK Subscriber
Subscriber
Hi,

Would anybody know the correct replacement parts for the two large capacitors that the Marantz 250 power amp has? All I know is that they are 20,000uf and 60V.

Thanks.
 
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Yeah, if you can get us some more info. What diameter/length are the caps? Screw terminals? Just curious, why do you need the new filters?

Nice amp, BTW.
 
The problem with Digikey, at least on the Canadian Site that I discovered yesterday is that the proper main caps 10Kuf 50V Nichicon KG snap in caps for my unit are "special order"- calls for 35MM caps to fit the holder, I have to buy 200 @ ~$1000 total to get one cap, Mouser on the other hand has them in singles, you may run into the same issue. I could cut the old caps and solder in a radial cap like i've seen on this site to maintain the look but I like the black and gold caps, look cool in the old amps.
 
Last edited:
these work (i used them in my 1200):

http://search.digikey.com/us/en/products/B41560A8229M/495-4239-ND/2269448

For my 1200 (not sure if the layout is the same in a 250 or not, but i bet its very similar):

they are slightly smaller in diameter than the originals, and maybe a tad taller. I used some small rubber tubing inside the original clamps, and left it thinner on the inside of both rings (if that makes sense), in order to get them as close together as possible so i could reuse the copper plate without modification. if you center them both in the original clamps, you will have to modify the copper plate (drill holes or make new cutouts or replace it with heavy gauge wire/ring terminals).
 
Not to hijack the thread here as the main cap question has been on my mind the last couple of days, did it change the sound? Only reason I ask is that the Nichicon Caps are audio caps and it seems that the rest are just general application caps.
 
bktheking said:
Not to hijack the thread here as the main cap question has been on my mind the last couple of days, did it change the sound? Only reason I ask is that the Nichicon Caps are audio caps and it seems that the rest are just general application caps.
Click to expand...

I have tried 5 different main filter caps in my low powered Marantz Receiver, and they all have a sonic signiture. The KG's are very very accurate but do tend to be just a hair on the lean side for me. I like full and punchy. (I do however think they are probably the most accurate not neccesarily the most musical sounding main filter cap choice) In the catagory of a sane choice the Nichicon KG's are very good. If you want the best IMHO get the Mundorf M-Lytics. Of course at 50.00 each for the 22000uf 63V and some modifications it is up to the individual and the system they have. (YMMV)
 
Thank you all for your responses.

I am having the 250 repaired by a fellow AKer, (JBLMAR). The question came up because he is going to change all the capacitors and he wanted to ensure that the proper parts are installed so the 250 will have a long, productive second life.

It's always a pleasure to see the amount of knowledge available on this site and the willingness of its members to share it.

Thanks again.
 
bktheking said:
Not to hijack the thread here as the main cap question has been on my mind the last couple of days, did it change the sound? Only reason I ask is that the Nichicon Caps are audio caps and it seems that the rest are just general application caps.
Click to expand...

No, the whole "for audio" thing is just marketing. There is no difference in these caps and that means you will not be able to hear one. Some people claim otherwise (that expensive is better) but that happens a lot in the audio world. It's full of lies and misinformation. :(
 
Ruxman said:
No, the whole "for audio" thing is just marketing. There is no difference in these caps and that means you will not be able to hear one. Some people claim otherwise (that expensive is better) but that happens a lot in the audio world. It's full of lies and misinformation. :(
Click to expand...

I will take the other side, you can easily hear the difference if you have the system that has the resolving power to hear it. Otherwise just put in the cheapest stuff you can find and no worries. It depends on what you want out of your system.
 
jblmar said:
The caps (C1, C2) measure;
4.25 inches (H)
2.5 inches (W)
Click to expand...

These from parts connexion will fit the clamps and are about the same height:

NICHICON-73619
QTY ADD
22,000uF / 63V, KG Series, Super Through, 63x100, Solder Lug



$49.95 $49.95 pcX USD Price

You will however have to modify as they are solder lug.
 
patfont said:
These from parts connexion will fit the clamps and are about the same height:

NICHICON-73619
QTY ADD
22,000uF / 63V, KG Series, Super Through, 63x100, Solder Lug



$49.95 $49.95 pcX USD Price

You will however have to modify as they are solder lug.
Click to expand...

Thanks!
 
Ruxman said:
No, the whole "for audio" thing is just marketing. There is no difference in these caps and that means you will not be able to hear one. Some people claim otherwise (that expensive is better) but that happens a lot in the audio world. It's full of lies and misinformation. :(
Click to expand...

I agree, there is a lot of misinformation here. IIRC, someone here said that caps don't need a 'burn-in' period to sound their best.
Go figure... :no:
I wonder why they could not hear the sound change as the caps fully form.
Go figure...:scratch2:
 
patfont said:
These from parts connexion will fit the clamps and are about the same height:

NICHICON-73619
QTY ADD
22,000uF / 63V, KG Series, Super Through, 63x100, Solder Lug



$49.95 $49.95 pcX USD Price

You will however have to modify as they are solder lug.
Click to expand...

Aren't the Mundorf available in the same values for about the same price?
The Model 250 Amp has great potential. One of the best in this power range.
Worth a few dollars more if necessary, IMHO.
Jay
 
PB_Audio said:
Aren't the Mundorf available in the same values for about the same price?
The Model 250 Amp has great potential. One of the best in this power range.
Worth a few dollars more if necessary, IMHO.
Jay
Click to expand...

Yes they are and they would be my 1st choice, but at 35mm in diameter they are not going to fit in the clamps like the Nichicons, and may or may not need extensive modifications to fit at both ends. The OP did not put up a pic of his cap arrangement. There is an early and late stlye, with one having a small circuit board on top. If it were mine I would do the Mundorfs, but the Nichicons would be a way easier installation.
 
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