issue with statements, RS-225-8

[soundemon]

Hey all
Seems I 've got an issue with one of my woofers in my statements. One of the woofers is making a buzzing sound at higher volumes, even when crossed over at 60Hz.

I swapped top / bottom and the probem followed the woofer. I measured them both and they're both stable at 6.4 ohms static resistance.

I'd imagine a replacement will be nessesary. I can see that the origional shielded woofer is no longer available. is the non-shielded RS225-8

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-356

a drop in replacement?
Thanks!

[john trials]

Dirt in the voice coil area, maybe? It's a common problem (it happened on 3 of mine). Try a 20Hz test tone to get the woofer moving, then spray compressed air into the voice coil area to flush out the grit. That's solved most people's RS noise problems.

[joeybutts]

Dirt in the voice coil area, maybe? It's a common problem (it happened on 3 of mine). Try a 20Hz test tone to get the woofer moving, then spray compressed air into the voice coil area to flush out the grit. That's solved most people's RS noise problems.

^^This.

But I am 99% sure I have seen it is a drop-in.

[Coconutout]

Dirt in the voice coil area, maybe? It's a common problem (it happened on 3 of mine). Try a 20Hz test tone to get the woofer moving, then spray compressed air into the voice coil area to flush out the grit. That's solved most people's RS noise problems.

seconded. for me the solution was a vacuum cleaner. savage, yes ops:

[cjd]

I've not tested the 225, but the RS180 and RS150's were perfect drop-ins, and I've seen results from 225's and 270's elsewhere suggesting PE did a great job making them just swap out.

C

[soundemon]

I opened everything up yesterday, but wondering, whats the best technique to get some compressed air in to the VC's? the spider is covering all access there - do i just get a test tone going and blow air into that ara and hope for the best? (sorry for the noob question)

[joeybutts]

I believe you just do it around the phase plug.....

[john trials]

Yes, blow the air from the front of the speaker into/around the phase plug area. No need to disassemble your speaker, or remove the drivers. Sorry...I should have been more specific.

[jeff_free69]

I've not tested the 225, but the RS180 and RS150's were perfect drop-ins, and I've seen results from 225's and 270's elsewhere suggesting PE did a great job making them just swap out.

C

That response seems a little OT for this thread, but it just happens to be along the lines of something on my mind, so i hope nobody minds me furthering the OT-ness...

I have a 1.5 cuft tower cabinet available, an RS225-4 and all the components for a Statement Monitor. I'm thinking about upsizing the Statement monitors from the RS180-4. The bass should be significantly deeper. Assuming the upper part remains the same , I'm just wondering if the XO tweaks would be very severe.

[joeybutts]

I'm pretty sure cjd meant that going from the shielded version to the unshielded is a perfect drop in, not that you can switch the driver sizes....... If I am reading your message correctly too.

[Jim Holtz]

That response seems a little OT for this thread, but it just happens to be along the lines of something on my mind, so i hope nobody minds me furthering the OT-ness...

I have a 1.5 cuft tower cabinet available, an RS225-4 and all the components for a Statement Monitor. I'm thinking about upsizing the Statement monitors from the RS180-4. The bass should be significantly deeper. Assuming the upper part remains the same , I'm just wondering if the XO tweaks would be very severe.

Curt would have to comment on the crossover changes (I'd expect quite a few) but I will comment on deeper bass with the RS225-4. All of the Statements series speakers have F/3's in the mid 30's. They are within a few Hz of each other. The differences are bass authority (no replacement for displacement) and maximum SPL capability. I would not expect a single 8" driver to offer significantly more bass impact than the single 7" in the existing design.

The modeling I've done with the new RS225's points to the RS225-8 unshielded as the best match of deep bass in a reasonable size ported enclosure. This is all with advertised T/S parameters in Unibox rather than actual measurements.

Jim

[cjd]

I'm pretty sure cjd meant that going from the shielded version to the unshielded is a perfect drop in, not that you can switch the driver sizes....... If I am reading your message correctly too.

Yes, that is indeed what I meant.

You probably can not go from one driver to another cleanly without at least some crossover tweaks. Though the RS180 to RS225 is going to be close, there are sensitivity differences to worry about no matter how you work it.

[jeff_free69]

Ah - now i see! (totally missed the point about the NLA shielded versions)...

Also, thanks for pointing out that the RS225-8 published specs do make it look like a better performer in a 1.4 cuft cab (than the 225-4 etc) and tantalizingly flat down to 40

(guess i should spin a new thread here ... )

but for that matter, the stock RS180-4 looks fairly close in extension in the same volume, so that might be a better solution.

But is that asking too much of the 180, assuming reasonable loudness levels? (Monitors have a net volume of ~.85cft) As far as the "7in" vs "8in" , if you put them side by side, the difference is much more than one might think. The effective diameter (not counting flange and surround) are about 4.5" and 6" with areas of about 16 and 28, respectively.

[soundemon]

Ended up replacing the woofer with the non-shielded RS255-8. Everything sounds great. Funny how one of the woofers being off messes up the whole sound!