Polk Audio CRS + (RDO198) Crossover Modification Thread

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  • ptrooper
    ptrooper Posts: 800
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    04jnlcspa688.jpeg
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    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • VR3
    VR3 Posts: 29,756
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    man you have some nice cylinders!!!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Tony M
    Tony M Posts: 12,027
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    They're exhibitionists too. :)
    Most people just listen to music and watch movies. I EXPERIENCE them.

    “Anger is an acid that can do more harm to the vessel in which it is stored than to anything on which it is poured.”
    --Mark Twain.

    “If at first you don't succeed, then skydiving definitely isn't for you.” - Steven Wright
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  • honestaquarian
    honestaquarian Posts: 3,275
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    Oy such naked pawrts!😲😬
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  • ptrooper
    ptrooper Posts: 800
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    Moved from the official fish room to new location. Tv to be mounted between piers in the future.d3melsx9bo1j.jpeg
    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • VR3
    VR3 Posts: 29,756
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    Looks great!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • honestaquarian
    honestaquarian Posts: 3,275
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    He's got a Sunfire!!!! B)

    High Fives all the way around Sean o:)
    Kinda makes me miss my CRS's.
    Just a quick suggestion. Move them a little further apart. About a foot should do nicely.
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  • ptrooper
    ptrooper Posts: 800
    edited April 2019
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    Yes,another sunfire sig . :p .Three recapped 2 x 625 signatures in the theatre room and this little 5 x 405 Sig that i just just bought via ebay which for some reason the seller kept refunding me ,i believe i trapped a Troll,I ended up paying for it 5 times until he finally got the message via ebay regs & rules.LMAO i had to wait untill the sellers credit card cleared before he could pay for the shipping ... double lmao.
    .They don't come around here down under very ofter, not forgetting we are 220v-240 v at 60 hertz mains powers here ,this sunfire sig was around $3900 us i think but i have the reps prices here at $11000 aussie dollars in 2000 when we could also buy a house for around 80k-100k.That US dollar was 1 for 2 back then .
    I only use two channels on the crs as the Mits are biwire!,Maybe i'll go for two sets of stereo Mits down the line and use current source to the top end.
    I will try moving them further apart later in the future when i get past the fear of the higher than usual "bump location" .
    I get my 105d signature two from Joe Rasmussen JLTI in a week so the 105 returns to dac duty here and the 205 sig2 goes back into the theatre room.
    Believe me when i say they still sound amazing close together.
    Thanks again to Trey <3 em
    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • honestaquarian
    honestaquarian Posts: 3,275
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    @ptrooper You have the same Sunfire Cinema grand Signature that I have. When I installed Trey's crossovers in my 3.1's and the impedance dropped, the Sunfire didn't even blink. 810 wpc I believe into 4 ohms yes?
    I cannot recommend using both the "Voltage" and "Current" outputs if your speakers are now bi-wire capable. "Voltage on the low end and "Current" on the high end.

    Btw according to research being able to hear proper stereo depends on the speakers being at least three feet apart.
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  • ptrooper
    ptrooper Posts: 800
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    I have now moved each speaker 3 inch's further apart and now have 3 feet between them.
    I would definitely recommend current to top end and voltage to lower end .....i have heard them this way and it is sweet as!
    honestaquarian .....please do try, i bet your smile will get bigger!
    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • honestaquarian
    honestaquarian Posts: 3,275
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    @ptrooper @pitdogg2 My apologies as I didn't complete that sentence and that thought.
    What I meant to say was that I cannot recommend using the "Voltage" and "Current" outputs if your speakers are now bi-wire capable highly enough!!!

    I am doing it with my 3.1's and have been all along even before the upgrades were done.


    Got to proofread before I hit post comment!!

    I definitely also recommend doing a serious upgrade to your MIT cables.
    I have the MH-750+ cables and I upgraded to the Shotgun S1's and S3's.
    I heard an improvement.
    Then I got another pair of S1's and heard an improvement when I swapped them out for the S3's
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  • ptrooper
    ptrooper Posts: 800
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    All good....These Mit cables were given to me with a set of SRS's that i purchased a while ago,I use them as rears and Trey bombed them for me, they were also apparently won by a contestant on"sale of the century"in the mid 80's here in Australia..
    In the very near future i will be replacing my theatre mains cables >:) and then these reference transparent biwires with mm2 will be on the CRS's , i know..biwires so only two channels, we'll see .I will also have reference xl mm2 balanced from oppo 105D to amp.
    I want it all now Momy.
    :'(
    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • ptrooper
    ptrooper Posts: 800
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    @la2vegas Sorry, just read your question..they'r not original stands, pretty much copied Larry's master piece's but a little taller
    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • cortico
    cortico Posts: 593
    edited April 2019
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    great job guys @vr3 @ptrooper per, I became a big fan of Claritcap... I wonder how the CMR compare to the CSA.
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  • VR3
    VR3 Posts: 29,756
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    Csa is no where close to the cmr, imo. The csa is a great cap but the cmr/Mr line is simply incredible, imo. Incredibly transparent
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • cortico
    cortico Posts: 593
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    VR3 wrote: »
    Csa is no where close to the cmr, imo. The csa is a great cap but the cmr/Mr line is simply incredible, imo. Incredibly transparent

    Thanks, I need to try the CMR.
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  • cortico
    cortico Posts: 593
    edited April 2019
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    I see the pretty hefty price tag as well, $80 for the 6.8uf 400v rate. The CSA which is one bracket below costs $10... I can only imagine that the top of the line has to be much superior
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  • ptrooper
    ptrooper Posts: 800
    edited April 2019
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    I had them built as i am a mere plumber/gas fitter :) I then filled them with lead shot so they are very heavy not to mention the extra weight of the x overs which shifted the crs's into into the heavy weight devision :p
    la2vegas wrote: »
    ptrooper wrote: »
    @la2vegas Sorry, just read your question..they'r not original stands, pretty much copied Larry's master piece's but a little taller

    No worries. Did you build them yourself, or did you source them out?

    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • VR3
    VR3 Posts: 29,756
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    Actually, the copper connect is most effective on larger caps. The copper connect is the copper lattice tied to the lead. Just a fwiw, that's why you won't find some smaller. Values below 620v
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
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    I don't get to do to many of the crs but I looking forward to trying these with the 2b!

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    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • JayMX
    JayMX Posts: 464
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    They’re almost too pretty to be hidden away… 🥲
    Current Collection: Monitor 4a (Peerless), Modified Monitor 7b (Peerless), RTA15TL (SL3000), Full mod SDA CRS 4.1TL (198’s), SDA SRS 2.3TL (198’s), R100's, R200’s, R300 🤩
    Pairs that have passed through: Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5B (Peerless), Monitor 5b (SL1000), Monitor 5b (SL2000) (4x pair), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s), Monitor 10a (Peerless), Monitor 10b (5x pair), RTA8, RTA8TL, RTA 11T, RTA12c (194's), SDA1(mod to “a” & SL1000 Wuhan mod), SDA CRS, SDA 2 (2x pair), SDA 2a, SDA 2b, SDA 1b, SDA 1c, SDA SRS 2 (2x pair), SDA SRS 3.1TL (198’s) (2x pair)...and more to come, it’s a sickness.
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  • VR3
    VR3 Posts: 29,756
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    Here is the 2btl version!

    qtoc70g6axw3.jpg
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    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • ptrooper
    ptrooper Posts: 800
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    xschop wrote: »
    I thought the factory enclosures could possibly benefit from a front to back cross-brace. Will you reinforce the area you cut out?
    Looks great.

    Sorry xschop for the late reply as I didn't notice this message 8 years ago :# , sda 's would definitely benefit from front-rear bracing.I didn't reinforce this cut out but the front and rear baffles won't resonate at the same frequency, thats for sure.

    These could do with your internal front to rear baffle brace and the Shaaaaken test :)
    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • xschop
    xschop Posts: 5,897
    edited August 28
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    Just copy my CRS+ dowel diagram B) Shakin' over here boss.

    You should copy the back-chambered RDO's too.

    You should also copy @Gardenstater's foam frame mod as well. Get the shout out.
    Don't take experimental gene therapies from known eugenicists.
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  • ptrooper
    ptrooper Posts: 800
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    xschop wrote: »
    Just copy my CRS+ dowel diagram B) Shakin' over here boss.

    You should copy the back-chambered RDO's too.

    You should also copy @Gardenstater's foam frame mod as well. Get the shout out.

    Too right on the upgrade speaker basket reflections , but truth be told, those chambered RDOs are giving me the screaming abdabs,fair dinkum, it’s a bit hairy!

    I learned a big word.....pontification----translates to ......On your soapbox!
    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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  • xschop
    xschop Posts: 5,897
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    Foreigner just came out with a new album.

    Agent Pontificateur.
    Don't take experimental gene therapies from known eugenicists.
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  • ptrooper
    ptrooper Posts: 800
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    Too right, mate! Love a bit of Foreigner. Head Games is an absolute ripper, Urgent goes off, and Cold as Ice is a bloody cracker of a track
    VR3 SDA SRS 1.2TL Duelund Monoliths+VR31000va Dreadnaught +VR3 MM2 SDA cable, <3 ,Lumin u2x ,<-sfp fibre <-LHYas8 Pro+ Switch,Transparent Reference MM2 xlr,power and speaker cables.FTA Sinope SE usb.40 Amp power line for amp with earth stake&Faraday shield ,20 Amp power line for digital equipment ->shunyata 8 venom power board...Working on it!
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