4.1 Tl

Neskahi
Neskahi Posts: 297
edited March 2008 in Vintage Speakers
What is gained by changing the inductor to .5 ohm when upgrading 2B's to the
4.1TL ? I read with interest how pleased nspindel is with the mod that I
gotta see [hear] for myself. Thanks.
SDA 2.3/RDO's... xovers by Ben
SDA 2.3TL/Stock..
SDA 1C/Solens/RDO's [gave to my Uncle]
SDA 2B RDO's
Snell Type CV
SDA 1.2TL's
GFA7700 Adcom
GFP750 Adcom
TFM55X Carver
M90 Pioneer/C90 Pre
M91 x 2 Pioneers/C91 Pre
Yaqin MC10l
DCD-1520/1560/2560 Denon
Marantz DVD-8400
Carver m1.5T
DV-79avi Pioneer
TFM35X x 2
Post edited by Neskahi on
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Comments

  • zingo
    zingo Posts: 11,258
    edited March 2008
    Actually, a 5.8uF capacitor is added in parallel with the 2.7 ohm resistor in order to modify the x-over for the addition of the SL3000/RDO-198. I just completed the upgrade on my CRS+ (or should I say SRS 4.1TL :D) with all new components as well and am now "burning them in". I am excited to hear what the difference is when they are done. (I have another 85 hours...) From what I've heard so far it will be worth it, but that was just a preliminary test.
    Jake
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  • MillerLiteScott
    MillerLiteScott Posts: 2,561
    edited March 2008
    Mine are modified to the TL spec. I did not replace the inductor though. I was deemed not necessary. YMMV. A modification well worth the $ and relatively little time involved to make the modifications.

    Just do it.:D You will never regret it once they burn in.

    Scott
    I like speakers that are bigger than a small refrigerator but smaller than a big refrigerator:D
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  • zingo
    zingo Posts: 11,258
    edited March 2008
    I knew they would make a large difference, but I thought that if worse comes to worse, I am preserving a classic pair of speakers by redoing the x-overs. Win-win either way.
    Jake
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  • amulford
    amulford Posts: 5,020
    edited March 2008
    I need to get off my **** and get mine done...
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  • F1nut
    F1nut Posts: 50,734
    edited March 2008
    What is gained by changing the inductor to .5 ohm when upgrading 2B's to the
    4.1TL ?

    Where did you get that idea from?
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • Gary Batson
    Gary Batson Posts: 124
    edited March 2008
    I just bought a pair of CRS+ on ebay. Where can I get all the information I need for this upgrade to TL. I need the FOR DUMMYS version.:)
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  • Face
    Face Posts: 14,340
    edited March 2008
    Gary Batson wrote: »
    I just bought a pair of CRS+ on ebay. Where can I get all the information I need for this upgrade to TL. I need the FOR DUMMYS version.:)

    http://www.polkaudio.com/forums/attachment.php?attachmentid=26710&d=1186358580
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • Gary Batson
    Gary Batson Posts: 124
    edited March 2008
    Thanks ! ! !
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  • DollarDave
    DollarDave Posts: 2,575
    edited March 2008
    Gary Batson wrote: »
    I just bought a pair of CRS+ on ebay. Where can I get all the information I need for this upgrade to TL. I need the FOR DUMMYS version.:)

    http://cgi.ebay.com/POLK-AUDIO-SDA-CRS-LOUD-SPEAKERS-RAREST-OF-RARE-COND_W0QQitemZ170201988127QQihZ007QQcategoryZ14993QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

    Did you buy these? Nice pair.
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  • Gary Batson
    Gary Batson Posts: 124
    edited March 2008
    Yep... I'm tired of waiting for a pair of 1.2 tls or SRS 2s to come up for sale within reach of me. So these will do untill then.
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  • Gary Batson
    Gary Batson Posts: 124
    edited March 2008
    Hope I didn't bid against you on these.
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  • DollarDave
    DollarDave Posts: 2,575
    edited March 2008
    Gary Batson wrote: »
    Hope I didn't bid against you on these.

    Nope, I was lucky enough to pick some up locally about a year or so ago. I don't see a need to ever get rid of them.
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  • BSUfbfan
    BSUfbfan Posts: 201
    edited March 2008
    Gary Batson wrote: »
    Yep... I'm tired of waiting for a pair of 1.2 tls or SRS 2s to come up for sale within reach of me. So these will do untill then.

    Isn't that the truth.... I got my CRS+ about 2 years ago after waiting for several years for some 1C's to come up near by. Good thing I didn't hold my breath....
    SDA SRS 2.3
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  • Gary Batson
    Gary Batson Posts: 124
    edited March 2008
    I've bid on three sets of 1.2 tls in three different states all requireing a two day round trip to get them and was outbid each time. On one pair I bid $3000.00 and still lost.
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  • Gary Batson
    Gary Batson Posts: 124
    edited March 2008
    Hope he's as happy with them as I would have been. I told a friend of mine not long after that, that If I bid a hundred thousand dollars on a box of cookies. Someone else would get them for a hundred thousand and ten.
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  • zingo
    zingo Posts: 11,258
    edited March 2008
    You will be real happy with the CRS+. They are great speakers that obviously aren't the big boys, but still hold their own against them and all other Polk speakers for that matter. Plus, size wise it's sooo much easier to work with.
    Jake
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  • Gary Batson
    Gary Batson Posts: 124
    edited March 2008
    I think I'll miss the deep bass I get with my SDA1s, But I'll be happier with the sound over all. Also, I'm anxious find out if the extra space between the stereo and the deminsional drivers improoves the soundstage. My original SDA1s can have a fairly wide soundstage but the sound is usually around the speakers and between the speakers.
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  • F1nut
    F1nut Posts: 50,734
    edited March 2008
    Neskahi,

    I'll post back on this thread to try and keep things straight. I see what you are talking about now.
    I also replaced the main inductor. On my meter the stock inductor measures 3.2 ohms. Parts Express sells a 15mH iron core inductor at .5 ohms.

    It appears he wanted to replace the one inductor with one of better quality, but could not find one of the exact value (16mH), so he used what they had avialable. It also has less resistance. Off the top of my head, I don't know how that would end up sounding. For twenty some dollars, you can find out too. :)
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • Mike Reeter
    Mike Reeter Posts: 4,315
    edited March 2008
    Gary Batson wrote: »
    Hope I didn't bid against you on these.

    It was me you were butting heads against:D

    Congrats,very nice example of CRS+'s
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