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Duelund/Mundorf Ultra Loudspeaker Purifiers

I have been eying the Duelund/Mundorf Ultra Loudspeaker Purifiers that Audioman58 have been advertising and knew based upon the forums I have been following for years that he was quite knowledgeable on capacitor typologies.

So, I took the plunge and ordered these and they arrived in 3 days to my SW state! I knew from experience that they will need over 200+ hours just to hear a glimpse of what these Duelunds are capable of but they didn’t disappoint right out of a cold box. I immediately heard more clarity, a deeper soundstage with better separation and a much lower floor noise…

These purifiers have been burning in 24/7 in my secondary system for nearly 2 weeks now and are really starting to open up. I listened to these purifiers last night in my primary system with just over 200 hours and the change was quite remarkable; musicality, tighter image focus, much better decay and note sustainment, unbelievable airy and spacious 3D sound, more vibrant and engaging sound with clarity being the standout.

These purifiers work as Audioman58 described and I’m still shaking my head on the beauty I’m hearing in my system and would Highly recommend this amazing product….

Wig😁

128x128wig
stereo5's avatar
stereo5
6,407 posts
 

I have been tempted, but my speakers have built in amplification for the bass and wonder if it would damage the built in amp?

Post removed 
wig's avatar
wig OP
1,270 posts
 

Reach out to the builder to see if they would be compatible with your built-in amp.

Wig

jimob
88 posts
 

I was a skeptic especially afterhav8ng the synergistic purifiers ,but I far totally wrong these are night and day better, the clean up the signal through the mundoff ultra resistors then to the top of class Duelund capacitors which are much better 

then in most speakers for sure, unless you have tried these new Products don’t 

give a opinion it’s just  speaking out of ignorance ,myself and 2 friends tried these That have the same  4 ohm speaker as myself they are. Built per speaker. 
after 150 hours burnin it’s very apparent.

iseland's avatar
iseland
144 posts
 

This is a well known zobel network, been around for many years and most x-over builders have probably tried a version or 2 when load is of and you need to even out impedance over the frequency band . How much it influences the sound have probably more to do with the amplifier not having a hard time driving the speakers.  A well built speaker with a well built network and good drivers have no need for this " purification " 

All the best 

Paul 

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