Any experience with Dayton RS225-8?

[lasse]

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

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.

[lasse]

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

[carlthess40]

What’s the model of the 6.5 focal woofers? And you you going to sell them ?

[Pete Schumacher]

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.

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.

[lasse]

Use the 13M.
Wolf

Thanks, Wolf for the advice!

Will do!

Regards//lasse
Stockholm, Sweden

[Wolf]

Use the 13M.
Wolf

[lasse]

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

[Paul K.]

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-8^th-order roll-offs at 1400 Hz. The system tuning frequency was 29 Hz and the predicted anechoic f3 was 32 Hz.
Paul

[Paul Ebert]

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.

[Millstonemike]

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.

[Pete Schumacher]

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 (+)

[Millstonemike]

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?

[aktiondan]

I have a pair of the paper-cone versions in a 78L cabinet tuned to 32 Hz and they sound absolutely wonderful. They are crossed a littler lower though, right around 180 Hz to an RS180P-4. I imagine the aluminum version being comparable in performance. But they can put out some serious bass, not subwoofer bass, but nice, clean, well-defined low end, perfect for music. I'm not sure where the upper limit on these would be though, since I don't use them up very high, but for a bass driver they are quite nice.