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In Reply to: RE: Easy Magnepan MMG tweaks? posted by ggking7 on September 09, 2010 at 11:49:11
Yes, that should improve your sound and it's a simple "tweak".
Buy some Mills 10w wire-wound resistors from Michael Percy or parts Connexion. They cost a buck or so, each. I suggest you buy a few pairs of slightly different values and decide which value produces the sound you like best. Say, 0.82, 0.91, 1.0, 1.2 & 1.5 ohms.
Then you can buy a pair of Duelund resistors at the preferred value - these sound even better!
The other good tweak is to put a small choke (inductor) in series with the tweeter. Go and search the Planar Asylum for details.
Regards,
Andy
Follow Ups:
I like that idea, thank you.Do resistors always come with metal that is prone to oxidation? I've been using mine for less than a month and the area where the set screws make an impression on the resistor wire has turned brown with rust. I live in Hawaii and everything rusts here.
Can a choke and resistor both be used without soldering, or is it one or the other?
Edits: 09/09/10
The lead wires are made of steel to allow magnetic handling in automated circuit board building machines. They are plated with something to allow them to be soldered.
Anything magnetic is bad for sound.
The JW Miller 5502 or 5522 RF chokes may give better sound than resistors if your problem is RF noise picked up by the speaker wiring acting as antennas. These chokes have very low DC resistance and do not compromise the dynamics.
When steel contacts a different metal like copper, it will
rust faster. I suggest stainless steel setscrews or at least
reg. steel ones coated with anti-ox compound such as lubriplate,
(lithium grease).
Coner
I've never experienced that - I guess the set screws punch through the tin(?) coating, so the bare metal is exposed? But the bare metal is copper so I would've thought that shouldn't really be a problem?
You'll be pleased to know that the Duelund resistors have solid silver lead-out wires. :-))
And re. " Can a choke and resistor both be used without soldering, or is it one or the other ?" ... ideally, as they are in series, yes you should solder the 2 items together in the middle. However, you could get away with instead using a "screw-cap" connector (that electricians use to connect like mains wires together).
Regards,
Andy
Thanks a lot.
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