Home Speaker Asylum

General speaker questions for audio and home theater.

Finally tweaked out my Monitor Audio RX-2's

For years I've been trying to rework these speakers to more of what I want.

The problem for ""me"" was what seemed to be a choked bottom end and a large deficit in the 2500-4000khz range.

Long story short. The box was WAYYYYYYYY over stuffed. Removed two layers of 1.5" (3" total) foam back panels and replaced them with one 1/2" layer. Opened up the bottom end and they have a more relaxed sound to them.

There was a problem with the transfer / crossover between the tweeter and woofer. Again long story short - The woofer coil was 1.1mH. Unwound approximately 2 layers to lower it to around 0.8-0.9mH. See tweeter mod below.

The tweeter was, well, almost useless!!! acting almost like a highly filtered crappy super tweeter. I mean it virtually had no function and made very little sound. The cap was 4.7uf. Bump it up to almost 8uf. NOWWWW with the lower extension the tweeter actually makes "music". But I think it really needs a 6uF cap after running the wave and measuring db on my meter.

Both modifications to the coil and tweeter really, I mean REALLY smoothed out the transfer between drivers. Now the speaker has a real 2-4KHz sound.

And no there was no notch filter or ringing from the woofer. Ran a few waves through it and wow, it is much better.

I have NOOOO idea what the duck those engineers were thinking when they built this crossover. Were they using different parts???

Charles



Edits: 11/24/15

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Topic - Finally tweaked out my Monitor Audio RX-2's - airtime 16:35:14 11/23/15 (1)

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