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  • lasse
    started a topic Any experience with Dayton RS225-8?

    Any experience with Dayton RS225-8?

    nd order at 600 Hz to Scan-Speak 13M/8640

    I think I can reach abt 30 litres CB when flushmount the baffle and reduce the mid-cabinet size

    Regards//lasse
    Click image for larger version

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  • lasse
    replied
    Hi all

    and thanks for all the feedback and advice.

    The woofers are in my workshop now, the work is in progress and I will be back with details in a separate thread.

    (But I can hint that the main question will be if it will be possible to use asymmetric slopes with the chosen drivers and if 1st order on the tweeter will be compatible with 2nd order on all the rest)

    Regards//lasse

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  • Guest's Avatar
    Guest replied

    You'd need Klippel data for that and I don't know of any tests done on it.
    Yes, a Klippel test would be the state of the art, but as I recall back in the day when D. B. Keele did reviews for Audio magazine, he would run a low frequency sine wave into the speaker, then observe the offset increase as he turned up the level. He at least gave a crude measure of it. That's we're I first learned about this. I have since observed this with cheap woofers, even with sustained notes in music. A day or two ago some poster said they observed this on a Reference 7" driver.

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  • lasse
    replied
    Originally posted by carlthess40 View Post
    What’s the model of the 6.5 focal woofers? And you you going to sell them ?
    7N402-DBE with two voicecoils.

    Well, IF the new woofers turn out to be successful, i Will probably sell them.

    I never could figure out the best way to Explore the special features with two coils so.....

    But I live in Sweden so the number of stamps on the parcel would be quite large.

    Regards// Lasse
    Stockholm, Sweden

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  • carlthess40
    replied

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  • Pete Schumacher
    replied
    Originally posted by zplane View Post
    Does anyone know if this woofer exhibits dynamic offset, where the cone's average position moves in or out with application of a large, steady sinewave? The cause is a non-symmetric BL(x) curve.

    I am thinking of using some for a project. TIA.
    You'd need Klippel data for that and I don't know of any tests done on it.

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  • Guest's Avatar
    Guest replied
    Does anyone know if this woofer exhibits dynamic offset, where the cone's average position moves in or out with application of a large, steady sinewave? The cause is a non-symmetric BL(x) curve.

    I am thinking of using some for a project. TIA.

    Leave a comment:


  • lasse
    replied
    Originally posted by Wolf View Post
    Use the 13M.
    Wolf
    Thanks, Wolf for the advice!

    Will do!

    Regards//lasse
    Stockholm, Sweden

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  • Wolf
    replied
    Use the 13M.
    Wolf

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  • lasse
    replied
    Hello,

    and thanks for all the feedback.

    I am now convinced that the RS225-8 is the right woofer for me.

    Now, you cunning DIY-ers, used to this woofer, what do you think?
    I have in my inventory a pair of Dayton RS52AN-8 mids. Is this a better choise than the existing SS 13M/8640, given the new woofers in the system you can see on the pictures in the OP?

    Regards//lasse

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  • Paul K.
    replied
    Like Pete, I paired an RS225-8 with an RS28F in my RS duets, a floor-standing ML-TL. "Markk" did the crossover design, a notched, Cauer-Elliptic having quasi-8th-order roll-offs at 1400 Hz. The system tuning frequency was 29 Hz and the predicted anechoic f3 was 32 Hz.
    Paul
    Click image for larger version

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  • Paul Ebert
    replied
    I crossed a parallel pair over to the RS52, 2nd order (sort of... it's a Duelund crossover) at around 600 hz in my Trilliums. I can't recall how I have them tuned, but the cabinets are around 75 liters. I have a few recordings that they can't keep up with, such as the Mercury Living Presence Firebird and the Reference Recordings Fiesta, but those really require a subwoofer. I'm completely happy with them.

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  • Millstonemike
    replied

    I'll see if I can have my buddy Otto send me some pics of the final product, but picture sparkly black grill cloth over dark walnut boxes and you'll have a good idea. Lots of diffraction to deal with in the enclosure that shows up in the tweeter response plot.

    We wound up with LR4 on tweeter and woofer. 12uF and 2.2 Ohm in series with the tweeter (+) and .25mH shunt
    2.2mH, 18uF + 1.5 Ohm shunt, and .8mH input to the woofer (+)
    [ATTACH=CONFIG]n1365311[/ATTACH]
    Thanks. I was thinking of using the RS-225 in my large Advent cabs with missing woofers and good original tweeters. But I was having problems crossing circa 1500 Hz, dealing with the RS-225 breakup. In the meantime, added some MCM 12" woofers and a cap/resistor to make the woofer LP 2nd order.

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  • Pete Schumacher
    replied
    Originally posted by Millstonemike View Post
    Any details on that?
    I'll see if I can have my buddy Otto send me some pics of the final product, but picture sparkly black grill cloth over dark walnut boxes and you'll have a good idea. Lots of diffraction to deal with in the enclosure that shows up in the tweeter response plot.

    We wound up with LR4 on tweeter and woofer. 12uF and 2.2 Ohm in series with the tweeter (+) and .25mH shunt
    2.2mH, 18uF + 1.5 Ohm shunt, and .8mH input to the woofer (+)
    Click image for larger version

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  • Millstonemike
    replied
    Did a re-fit of an old vintage 2-way with the RS225-8 and the RS28F crossed at around 1500Hz. Stunned at how good they sounded. Great woofer.
    Any details on that?

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