post #601 of 601

Hi Lehmanhill, it was reading your post which sparked my interest in the K71-4. As I mentioned I have the 1uf K71-4 paralleled a 0.1uf K72P-6 and a 1uf MBM. I think the MBM mix with the them, while the MBMs add a bit of body they are also quite transparent which is very important when you are dealing with caps like the K17-4. Further, adding these to the mix did not mess up the soundsgate which was improved by the K72P-6.

 

I have had this combination in my amp for a few days now but I think I a slightly smaller MBM cap might be better. I just finished some more testing with and without the MBM tonight. Without the MBM the combination f K71-4 and K72 has deeper and punchier bass but the bass also sounds a bit more forced, boxy, and less natural. There is also less bass in quantity overall signature is more forward with a more attack and airy highs. Upper mids are emhasised voices and guitars really stand out. I also think the sound is slightly more detached from the speakers but this could be due to the forward signature.

 

With the MBM caps the sound becomes more focused on the midrange instead of upper mids and highs. Overall the sound is more balanced. The sound is less punchy but much more natural and organic with transients being more drawn out. I think a smaller MBM cap might retain just a bit more airiness and make the sound just a tad punchier and more detached from the speakers.

 

Today I asked an ebay seller to make me a selection of MBM caps of different values. When these arrive I will play around with them a bit to see what ratio is best.

 

Also, I have seen these in widely different voltage ratings from 160 up to 1500. I wonder what the sonic differences are.


Edited by Jasper9395 - 2/17/15 at 5:19pm