Thank you very much everyone for your responses.
The amplifier has approximate 10 hours playback and sound for now I am not convinced at all in general. There are specific aspects as I said these days that are clearly better. But those improvements without fluency reproduction without tonal balance for now should I care little.
On the other hand it is unfair to enter yet objectively assess changes while the new material to settle and because I have not done the fine tuning and DC bias. The amplifier still retains the settings you had with the old capacitors ... (going to kill me: D)
Anyone have experience with the capacitor 150UF / 6.3 V Nichicon organic polymer for signal path (Gootee, use signal path with your permission😉? Replaces a Sanyo Oscon.
regards
dmxplosion
The amplifier has approximate 10 hours playback and sound for now I am not convinced at all in general. There are specific aspects as I said these days that are clearly better. But those improvements without fluency reproduction without tonal balance for now should I care little.
On the other hand it is unfair to enter yet objectively assess changes while the new material to settle and because I have not done the fine tuning and DC bias. The amplifier still retains the settings you had with the old capacitors ... (going to kill me: D)
Anyone have experience with the capacitor 150UF / 6.3 V Nichicon organic polymer for signal path (Gootee, use signal path with your permission😉? Replaces a Sanyo Oscon.
regards
dmxplosion
Finally yesterday I adjusted the bias and DC value in the integrated Densen DM-10. I have no words to describe the suffering dramatic improvement in the amplifier. I have re-premiere, magic returns to its unmistakable sound of DM.
Finally the changes that have been made to the amplifier are:
-New potentiometer (like the original) ALPS 10k logarithmic
-caps 8 x 10,000 uf / 63V Multicomp HPR Series (May be Mundorf in few months but not clearly see why I should remove the Multicomp new)
-caps 4 x 470uf / 100V Vishay BC
-caps 4 x 100uf / 25V Nichicon Fine Gold
-caps 2 x 100uf / 6.3 V Nichicon organic polymer
I left mounted original polyester capacitors Wima and Philips MKT.
I have a question I'd ask. The Nichicon organic polymer replaces the Sanyo Oscon originally riding and is in the signal path. I have a doubt whether I have chosen the Nichicon and is especially good for audio in step signal or is for computer aplications? The sound is very good at the moment but I wanted to contrast with this.
regards
dmxplosion
Finally the changes that have been made to the amplifier are:
-New potentiometer (like the original) ALPS 10k logarithmic
-caps 8 x 10,000 uf / 63V Multicomp HPR Series (May be Mundorf in few months but not clearly see why I should remove the Multicomp new)
-caps 4 x 470uf / 100V Vishay BC
-caps 4 x 100uf / 25V Nichicon Fine Gold
-caps 2 x 100uf / 6.3 V Nichicon organic polymer
I left mounted original polyester capacitors Wima and Philips MKT.
I have a question I'd ask. The Nichicon organic polymer replaces the Sanyo Oscon originally riding and is in the signal path. I have a doubt whether I have chosen the Nichicon and is especially good for audio in step signal or is for computer aplications? The sound is very good at the moment but I wanted to contrast with this.
regards
dmxplosion
Last edited:
Glad to see you had success, mate !! 
Don't bother. Oscons are more highly regarded in digital circuits, but some also
like them in analog, esp. the Oscon SA and SP series. While the Nichicons likely
will sound slightly different, the difference won't be huge if they're polymer too.
You'd need to compare by swapping again.
You mentioned to try Mundorfs. I have some Mundorf HC and these are great,
but if you already like the sound, I'd keep the Multicomps. You'd waste a lot of
money if you wouldn't notice a positive difference with the expensive Mundorfs.
Consider to look for a replacement of the MKTs instead. There are superior film-
foil caps (Epcos, Vishay-Roederstein, Wima FKP) and if you're lucky, you may
find some that fit the required lead spacing and capacity. Swapping these caps
will just cost you a fraction of the Mundorf lytics.
Feel free to tell me about each application, lead spacing and capacity and I'll
help you to find proper KP/FKP replacements as I have almost all the datasheets
and catalogues on hand.
Don't bother. Oscons are more highly regarded in digital circuits, but some also
like them in analog, esp. the Oscon SA and SP series. While the Nichicons likely
will sound slightly different, the difference won't be huge if they're polymer too.
You'd need to compare by swapping again.
You mentioned to try Mundorfs. I have some Mundorf HC and these are great,
but if you already like the sound, I'd keep the Multicomps. You'd waste a lot of
money if you wouldn't notice a positive difference with the expensive Mundorfs.
Consider to look for a replacement of the MKTs instead. There are superior film-
foil caps (Epcos, Vishay-Roederstein, Wima FKP) and if you're lucky, you may
find some that fit the required lead spacing and capacity. Swapping these caps
will just cost you a fraction of the Mundorf lytics.
Feel free to tell me about each application, lead spacing and capacity and I'll
help you to find proper KP/FKP replacements as I have almost all the datasheets
and catalogues on hand.
Thank you very much for your predisposition to help, ticktock.
I point all that appointments to replace polyester capacitors.
Turning to the organic polymer Nichicon I installed clarify that I have replaced a Sanyo OSCON electrolytic, so my doubts Nichicon good function of the circuit at that point. I put it as a professional in Spain I was recommended taking into account the characteristics of my amp and the idea of not changing the original timbre. What happens is that my technical level is very low but nevertheless I like to know the details of an amp design I love. Considering purely musical terms is the most elegant and solid electronic music I have ever heard in terms absolutos.Si we also note that your final price in 1999 was 2,300 Euros in Europe I think a real bargain stratospheric dimensions. It was the most expensive European integrated amplifier at the time (1992) that appeared and then signed by a company that was born and nobody knew. The story behind this amp still makes it more special. Its perfect over the years is something that haunts me. I will die with this amp.
regards
I point all that appointments to replace polyester capacitors.
Turning to the organic polymer Nichicon I installed clarify that I have replaced a Sanyo OSCON electrolytic, so my doubts Nichicon good function of the circuit at that point. I put it as a professional in Spain I was recommended taking into account the characteristics of my amp and the idea of not changing the original timbre. What happens is that my technical level is very low but nevertheless I like to know the details of an amp design I love. Considering purely musical terms is the most elegant and solid electronic music I have ever heard in terms absolutos.Si we also note that your final price in 1999 was 2,300 Euros in Europe I think a real bargain stratospheric dimensions. It was the most expensive European integrated amplifier at the time (1992) that appeared and then signed by a company that was born and nobody knew. The story behind this amp still makes it more special. Its perfect over the years is something that haunts me. I will die with this amp.
regards
"Finally yesterday I adjusted the bias and DC value in the integrated Densen DM-10"
Did you do this before you starting changing components without knowing if they were faulty?
It is possible that your only problem is that bias had drifted off over time 😱
Did you do this before you starting changing components without knowing if they were faulty?
It is possible that your only problem is that bias had drifted off over time 😱
Of course. The first suspicion, of course, was a progressive loss of breath, dynamics, speed, detail ....... However this can always meet subjective factors. circuit status checked visually. Everything was perfect. However, besides the change in sound, the dm-10 when it casts off for 3 minutes sound from the speakers when the capacitors are emptied. Over time, that time was reduced ostensibly, unequivocal sign that the capacitors were not top of his load. Far from settle, dismounted capacitors and suitable material .............. I measured the result gave me reason decisively. 8 10.000uf capacitors were 6 disabled and 2 with a maximum load less than 5000uf.
I made a bad use of my amp which has been 13 years on. Literal, 13.
The results made me aware of a thorough review of my amp if I wanted to keep it. That was clear, it's like my son: D
There are only 1700 units approximately MKII version of Densen DM-10. It is like water in the desert. Magic! and also guaranteed for life but is made bombproof. Zero problems and continuously on making a smile on my face.
regards
I made a bad use of my amp which has been 13 years on. Literal, 13.
The results made me aware of a thorough review of my amp if I wanted to keep it. That was clear, it's like my son: D
There are only 1700 units approximately MKII version of Densen DM-10. It is like water in the desert. Magic! and also guaranteed for life but is made bombproof. Zero problems and continuously on making a smile on my face.
regards
Hello,
i am a proud owner of older DM 20 & 30 too.
Can you give me a short description how to adjust the bias and dc and to which numbers?
Thank you very much and greetings.
Thorben
i am a proud owner of older DM 20 & 30 too.
Can you give me a short description how to adjust the bias and dc and to which numbers?
Thank you very much and greetings.
Thorben
I do that too, sweatshirts work good also...
+1 to what Andrew said.
Another thing to keep in mind is that the older parts may have been contributing to a sound that was possibly a bit shy on bass. I have found that my lower powered amps appear to sound more delicate.
+1 to what Andrew said.
Another thing to keep in mind is that the older parts may have been contributing to a sound that was possibly a bit shy on bass. I have found that my lower powered amps appear to sound more delicate.
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