Magnepan 1.7 crossover capacitor improvement?


In my never ending quest to eliminate "glare" from all components I've recently realized that my MG 1.7's are a contributor. The crossover caps in them are nothing to write home about, a mixture of non descript caps including an Axon totaling 116.8uf in the mid range and an additional 10uf Axon for the tweeter. Since Axon is basically Solens which does have glare issues, I'm ready to move on. After snooping aroud it sounds like a mixture of Clarity ESA series/ 250V + Mundorf supreme replacements in the mid range and Mundorf Supreme for the tweeter would be a good choice. But i'm curious if someone here has already trod this path and found a different path thats reasonably affordable ( not Duelends and Vcaps...grin)
At this point I have glare about 95% tamed but there are still certain CD passages that cause that chalk board scraping sensation.
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Showing 8 responses by jordi

the above directions on how to remove the side supports are correct but the cap value is wrong ...its 115.8 not 116.8 and the best combo you can use is 3 33uf Sonicaps gen1.... one 10uf sonicap.... and one 6.8sonicap......Use a 10uf Dynamicap in the tweet position and use Alpha Core 1.4 inductors....and you will die 100 thousand deaths over the improvement. If you want pics and help just drop me an e-mail at prettypugsley@rcn dotcom
3.7's or 1.7's same Ferrari with 20.00 tires on them. Magnepan did not spend more then 5.00 on each crossover in either the 3.7's or the 1.7's and personally I have a huge problem with that. Kind of embarrassing to be honest. No matter how you slice it putting a bigger engine in either of those Ferrari's changes nothing. Without great tires you have NOTHING
The upgrade requires 115.8mf not 116.8 as stated above and a 10mf and 1.4uf inductor. Best is to use alpha core inductor and 3 sonicap 33mf a 10mf and 6.8mf to create your 115.8. You will not fit this in the panel base and must do it external and this will cost about 5-600.00 and will make your 2k speakers soUnd like 20k speakers. The difference is massive if you use the combo mentioned above. Use dynamicaps in the tweeter position the caps and inductor stock in the 1.7 are the worst possible quality on earth and were done to meet a price point because no one in their right mind would use the junk caps and inductors they used for any other reason...it wil take some time and patience but is well worth it
After a 2 week period I can tell you all that if magnepan company could hear my crossover improvement they would throw up........... The 1.7's with my external crossover blow away their stock 3.6's by a mile...these things are way more smooth, way more revealing, way more bass that is tighter and faster and the highs more extended and no edge whatsoever. Its unbelievable what a mess they are stock. Just have to realize you might as well leave the stock crossover in place and make it external because there is no way to fit the mod inside the little space that the 1.7's allow for crossover. Very very poor design and overall just a price point setup. The 1.7's deserve better then what they have stock .............they deserve my setup 1000% period!!!!!!!!!!!
after one month i can tell you this is not a slight upgrade it is a massive upgrade and this new crossover assembly has taken me so close to the music its frightening...for shame magnepan for not offering a better setup to your customers or at least the option of getting a top notch setup instead of the junk that is in these speakers stock...
After 3 months with my upgrade I have been able to now power them with my 50 watt per side Quicksilver 6c33c mono block with plenty of room to spare no need for the 500 watts of solid state I had to use before this upgrade . Took all the trash magnepan put in their crossover circuit and deleted it and replaced it with quality crossover components and now is just a pure state of serious clean musical pathway to my source material.... The problem all along is this crossover trash they used!!!!!!!!!! Feel free to email me for detailed pics on a step by step re-modeling of your seriously and horribly compromised 1.7's
Well the Quicksilver 6C33c'S UP TILL THIS POINT COULD handle any speaker I threw at it and these was just a ton left on the table before the upgrade and then after the upgrade more power then I ever will need full robust power typical of what I came to expect from the 6C33C TRIODE Quicksilver . After questioning SANDERS at Q-silver what I said above are basically his words...for pics just e-mail me pretty pugsley at r c n dot com
By the way Stickman451 I took my 1.7's over to my buddies home who owns 3.7's and we did a side by side and he said my 1.7's blew his 3.7's away in every category. We are now in the process of ordering up everything to do his 3.7's crossovers.