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In Reply to: RE: Upgrading Polk Audio Monitor JR5s posted by matthewarends@gmail.com on December 02, 2014 at 15:04:23
I am not familiar with the Polks in question, but a quick look at the crossover might be informative. Iron core coils can saturate and give you muddy sound, as can inexpensive capacitors. If there are big white resistors in series with the drivers they can seriously degrade the sound. You just might get a pretty impressive improvement with a minimal investment. I can give you some decent caps to use to bypass the installed caps. You can use alligator jumpers to temporarily connect them to give you an idea of how bypassing will impact the sound.
Best Regards,
Lou
Follow Ups:
The Polk 5jr crossovers have an air core coil and use what I believe are mylar caps bypassed with a silver mica cap. Don't recall what resistors are used. A good film and foil or metalized cap and mills resistors will provide a good improvement to what I consider a pretty decent speaker for it's size. Many dislike the "silver coil" tweeter (if it has them) and consider the replacements available from Polk a big improvement.
That series of Polks (5jr.,5,7 and 10 were considered great values when new.
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Freak out...Far out...In out....
AWESOME! Someone with specific experience with this speaker! I have an over abundance of Clarity Caps in something like a .33uF value. A Mills resistor has minimal cost, so if you do have the less desirable tweeter you should have ample funds for an upgrade. If not you'll have more money for pampers! :-) Oh, as a father, unless you can secure them somewhere at ear level you would be well advised to live with less than ideal sound for a few years for safety's sake.
Best Regards,
Lou
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