Insulating SRS's
drumiv
Posts: 171
Is there a thread on properly insulating the SRS's? I was just looking at a thread about polyfilling the 1c's. One of the posts mentions there should be no insulation behind the passive radiator. How about behind the mids? Is it the same for the SRS's?
Post edited by drumiv on
Comments
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The polyfil should be no lower than the lowest MW's, definitely not behind the PR. That will kill the bass. One of the proven tweaks here with SDA models, and really any Polks with a PR, is to install strips of Black Hole 5 behind the MW's. It cleans up mid range congestion and provides greater clarity. Also, improves the bass. You would use the Black Hole with the polyfil, not in place of."Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills/jantzen inductors, Gimpod's boards, Lg Solen SDA inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips, interior of cabinets sealed with Loctite Power Grab, AI-1 interface with 1000VA A-L transformer
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drumminman wrote: »The polyfil should be no lower than the lowest MW's, definitely not behind the PR. That will kill the bass. One of the proven tweaks here with SDA models, and really any Polks with a PR, is to install strips of Black Hole 5 behind the MW's. It cleans up mid range congestion and provides greater clarity. Also, improves the bass. You would use the Black Hole with the polyfil, not in place of.
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Thanks for the replies, gents. That's extremely interesting. Every speaker I've taken apart(non-Polk), has all sides covered, no exposed wood.
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That is a fact, nb.
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Don't forget to wrap the backs of the midwoofers in heat tape. That will ensure a seemless insulation integration from top to bottom!--Gary--
Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out. -
Heat tape? First I've heard of that. What exactly does "Heat Tape" do?Don't forget to wrap the backs of the midwoofers in heat tape. That will ensure a seemless insulation integration from top to bottom!Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
I was being a smart @ss, sorry. Heat tape keeps pipes from freezing. The title of this thread about insulating SRS made me think of it. Sorry for the confusion! lol--Gary--
Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out. -
GotchaHome Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
I was being a smart @ss, sorry. Heat tape keeps pipes from freezing. The title of this thread about insulating SRS made me think of it. Sorry for the confusion! lol
Only a "smart @ss" from Georgia jokes about heat tape and frozen pipes in the midst of the kind of winter we have had in the great Northeast! :-)Family Room, Innuos Statement streamer (Roon Core) with Morrow Audio USB cable to McIntosh MC 2700 pre with DC2 Digital Audio Module; AQ Sky XLRs to CAT 600.2 dualmono amp, Morrow Elite Speaker Cables to NOLA Baby Grand Reference Gold 3 speakers. Power source for all components: Silver Circle Audio Pure Power One with dedicated 20 amp circuit to main panel.
Exercise Room, Innuos Streamer via Cat 6 cable connection to PS Audio PerfectWave MkII DAC w/Bridge II, AQ King Cobra RCAs to Perreaux PMF3150 amp (fully restored and upgraded by Jeffrey Jackson, Precision Audio Labs), Supra Rondo 4x2.5 Speaker Cables to SDA 1Cs (Vr3 Mods Xovers and other mods.), Dreadnaught with Supra Rondo 4x2.5 interconnect cables by Vr3 Mods. Power for each component from dedicated 20 amp circuit to main panel, except Innuos Statement powered from Silver Circle Audio Pure Power One. -
How'd ya like that Polar Vortex up there in New Hamshaaaa?Moose68Bash wrote: »Only a "smart @ss" from Georgia jokes about heat tape and frozen pipes in the midst of the kind of winter we have had in the great Northeast! :-)
Was pretty brutal here in JanuaryHome Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
westmassguy wrote: »How'd ya like that Polar Vortex up there in New Hamshaaaa?
Was pretty brutal here in January
All I can say is that I moved out here from Palo Alto, CA, because I missed having four "honest-to-God" seasons.
Now, I've had enough snow, ice and sub-freezing temperature to last me the rest of my life!
Actually, it's a lot of fun -- err, maybe a little too much fun. Just like I maybe have a little too much maturity! :-)Family Room, Innuos Statement streamer (Roon Core) with Morrow Audio USB cable to McIntosh MC 2700 pre with DC2 Digital Audio Module; AQ Sky XLRs to CAT 600.2 dualmono amp, Morrow Elite Speaker Cables to NOLA Baby Grand Reference Gold 3 speakers. Power source for all components: Silver Circle Audio Pure Power One with dedicated 20 amp circuit to main panel.
Exercise Room, Innuos Streamer via Cat 6 cable connection to PS Audio PerfectWave MkII DAC w/Bridge II, AQ King Cobra RCAs to Perreaux PMF3150 amp (fully restored and upgraded by Jeffrey Jackson, Precision Audio Labs), Supra Rondo 4x2.5 Speaker Cables to SDA 1Cs (Vr3 Mods Xovers and other mods.), Dreadnaught with Supra Rondo 4x2.5 interconnect cables by Vr3 Mods. Power for each component from dedicated 20 amp circuit to main panel, except Innuos Statement powered from Silver Circle Audio Pure Power One. -
Yea, it's been brutal here too..it was only 55 the other day.
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We had our January thaw, so it's back to normal now, but jeeze over two weeks of sub-zero in the am, and it never got above 12 during mid day. That was brutal.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
I have relatives in south Florida, and they said there were quite a few cold daysYea, it's been brutal here too..it was only 55 the other day.Home Theater/2 Channel:
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
dhsspeakerservice.com/ -
Yes there were. Then hot. Then cold. This week looks like mid 70's. I'll take that all year. I do miss the autumn in D.C., and, yes, even the snow.
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Don't forget to wrap the backs of the midwoofers in heat tape. That will ensure a seemless insulation integration from top to bottom!
I realized you were being a smart A$$ when i read it but it actually gave me an idea. A good bit of distrtion comes from the acoustic waves first reflections inside the speaker system just as it does out in the listening environment. In earlier days we looked for ways to fill in the area beghind the cone between the frame and the magnet. The front surface of the magnet assembly is the first reflection in many cases. This then bounces back to the rear of the cone causing phase issues with the sound at the cones front and back surfaces. I never considered tape because it is just too flimsey and would compress under pressure. But thats the mental image i got when reading your comment. And aalso after justy reading about the Black Hole again. Then it hit me; what about shaping some Black hole to just fit this area on the front of the top plate of the magnet assembly. Not much at all, just enough to smoothly fill the wedge area between the frame and the magnet top plate. This would be much easier than other things that can be done to fill this area. Not sure exactly how much this would help on these driver due to the width of the frame spokes also being a similar trouble spot on these drivers. A very thin layer of sound absorbing material on the backs of the spokes may be helpful but could also cause interference issues if not thin enough and then may be too thin to be effective.If con is the opposite of pro, is Congress the opposite of Progress?!
Monitor 5Jr, Monitor 5, RTA12, RTA 15TL, SDA 2A, 1c, SRS 2, 1.2TL, CRS, Atrium. -
Well I'm glad my "dry" sense of humor got the wheels turning for ya.
--Gary--
Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out.
