RT 400 questions

lsiehler
lsiehler Posts: 3
edited March 2011 in Vintage Speakers
New to the forum.
Just "scored" a pair of RT 400s at Goodwill - only a few scuffs, and work perfectly.
Reviews and my first, pre-cleanup listening indicate my kind of sound: clarity, excellent imaging and substantial, clean bass.

My questions are these:
During what years were these manufactured?
Are the drivers ferro-fluid cooled?
Was the original msrp $400 per each or per pair? The Polk page on these says $400/each, but other reviews, etc. indicate $400/pair.
Post edited by lsiehler on
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  • HTguru1982
    HTguru1982 Posts: 1,066
    edited March 2011
    Great catch. The RT400's are nice speakers. I believe they were manufactured from '97-98'. Retail price was slightly above $400/pair - not sure why it says $400 EACH on Polk's page. Also not sure about the drivers. I'm sure someone here knows.
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  • Joe08867
    Joe08867 Posts: 3,919
    edited March 2011
    I believe they were about 450-500 for the pair back in the day. MSRP and actual will be quite different on most speakers.

    I believe the tweeter is Ferro-Fluid cooled.
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  • shack
    shack Posts: 11,154
    edited March 2011
    RT400

    1 - 7 1/2" Dynamic Balance Driver
    1 - 1" Dynamic Balance Polymer dome tweeter
    Overall Frequency Response: 40Hz - 22kHz
    -3dB Limits: 50Hz - 20kHz
    Impedance: 8 ohm
    Recommended Amplification: 20 - 150 watts/channel
    Efficiency: 89dB
    Magnetically shielded.
    Available Finish: Video Gray
    Cabinet Dimensions (HxWxD): 36 1/2" x 9 1/3" x 10 1/4"
    "Just because you’re offended doesn’t mean you’re right." - Ricky Gervais

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  • shack
    shack Posts: 11,154
    edited March 2011
    For the time being my RT400s are in my 2 channel system in place of the SDA 1Cs. I love these speakers.
    "Just because you’re offended doesn’t mean you’re right." - Ricky Gervais

    "For those who believe, no proof is necessary. For those who don't believe, no proof is possible." - Stuart Chase

    "Consistency requires you to be as ignorant today as you were a year ago." - Bernard Berenson
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  • lsiehler
    lsiehler Posts: 3
    edited March 2011
    Thanks for the replies & info!
    Anyone know what the "Dynamic Balance" is all about?

    By the way, my main speakers are even more vintage than the Polks:
    Dyna A40XLs stacked with KLH 5s. Great imaging, but a lot of eq needed to get my preferred sound (actually, the tweeters are out on the KLHs, but the Dynas have enough to go around). These were before ferro-fluid.
    I hope to use the Polks as a secondary system with my Scott 340B tube receiver, possibly for home theater sound.
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  • shack
    shack Posts: 11,154
    edited March 2011
    lsiehler wrote:
    Thanks for the replies & info!
    Anyone know what the "Dynamic Balance" is all about?

    Marketing....
    "Just because you’re offended doesn’t mean you’re right." - Ricky Gervais

    "For those who believe, no proof is necessary. For those who don't believe, no proof is possible." - Stuart Chase

    "Consistency requires you to be as ignorant today as you were a year ago." - Bernard Berenson
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  • shack
    shack Posts: 11,154
    edited March 2011
    http://www.polkaudio.com/education/tech_article.php?id=25
    "Just because you’re offended doesn’t mean you’re right." - Ricky Gervais

    "For those who believe, no proof is necessary. For those who don't believe, no proof is possible." - Stuart Chase

    "Consistency requires you to be as ignorant today as you were a year ago." - Bernard Berenson
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