Have pairs of these sitting around in original manufacturer boxes collecting dust.
Dayton RS28F-4
Dayton RS 100-4
Dayton RS150-4
Dayton RS 225-8
Any thoughts/ideas of what could be made into a set of relatively smalll monitors using sets of these or what "could" I do??? Just looking for ideas as I'm flatlining in the creativeness department right now.
Dayton RS28F-4
Dayton RS 100-4
Dayton RS150-4
Dayton RS 225-8
Any thoughts/ideas of what could be made into a set of relatively smalll monitors using sets of these or what "could" I do??? Just looking for ideas as I'm flatlining in the creativeness department right now.
Fast/Waw Transmission Line with RS100 over RS225 (see 10F/8424 & RS225-8 FAST / WAW Ref Monitor)
Bookshelf/Monitor 2 Way with RS28F over RS150 (I believe there's a kit on Parts Express that uses these drivers, may be wrong. The RS100 is probably better if you need a real small box, but I haven't looked real close at specs or plugged them into winisd.
Or get more and build an open baffle SWMTMWS Horbach-Keele array.
Bookshelf/Monitor 2 Way with RS28F over RS150 (I believe there's a kit on Parts Express that uses these drivers, may be wrong. The RS100 is probably better if you need a real small box, but I haven't looked real close at specs or plugged them into winisd.
Or get more and build an open baffle SWMTMWS Horbach-Keele array.
define relatively small? Is that 9 liters or 14 liters (0.5/ft3) everyone has their own notion on what small.
If 0.75/ft3 (sealer) is considered small - you can find a RS225 and RS28F design on PartsExpress forum (techtalk.com)
If 9 liters is small - as mentioned above their is a RS150 and RS28F design at the same place.
If you are looking for tiny - the RS100 and RS28F would be great, down to about 80-100 Hz in 4-5 liters. Might have trouble fitting the XO in the box. I think there is a design with RS125 or RS100 and RS28A tweeter at the same place too (easy enough to adapt to your tweeter).
google the speaker combination with techtalk in the search box and you should get lots of options.
If 0.75/ft3 (sealer) is considered small - you can find a RS225 and RS28F design on PartsExpress forum (techtalk.com)
If 9 liters is small - as mentioned above their is a RS150 and RS28F design at the same place.
If you are looking for tiny - the RS100 and RS28F would be great, down to about 80-100 Hz in 4-5 liters. Might have trouble fitting the XO in the box. I think there is a design with RS125 or RS100 and RS28A tweeter at the same place too (easy enough to adapt to your tweeter).
google the speaker combination with techtalk in the search box and you should get lots of options.
The best you can do is a 3 way RS225 + RS150 + RS28F. Not small obviously, due to the 8" bass. All else is a compromise. If 10L is small then consider the RS150 with the tweeter.
Ralf
Ralf
I'd go with what bizarro/Confucius said.
The 225 can work from a half to two cu.ft.
But now you have to pick a size/placement......
The 225 can work from a half to two cu.ft.
But now you have to pick a size/placement......
Ok, good point on defining small. My bad. Well, I do not want them to be floor standing. That's far too big. 2 cu ft is too big. I'd like to max out at 1.5 cu ft for the internal volume or be smaller than that. Just looking for ideas of something that will work nicely using some combo of those drivers.
I will also hit up techtalk.
I just finished building a set of full range floor standers with Mark Audio Alpair 11MS drivers. Grinning like it's an early christmas !! 😀 So while I have the tools out, thought I'd bang together a little something else. So gents..... very much appreciate the thoughts and ideas here. Thank you.
I will also hit up techtalk.
I just finished building a set of full range floor standers with Mark Audio Alpair 11MS drivers. Grinning like it's an early christmas !! 😀 So while I have the tools out, thought I'd bang together a little something else. So gents..... very much appreciate the thoughts and ideas here. Thank you.
RS225-8 is predicted to work in a TL with the RS28F in a Monacor WG300 waveguide. I have it modeled but not built yet.
Passive XO for Time-Aligned RS225-8 and RS28F in Waveguide
The TL has been built and proven but probably rather large for the application here. However a smaller sealed or reflex alignment can be done. A 1.26 cubic ft box with reflex vent is 36Hz. 1.5 cubic foot might get to 32Hz. That’s a decent amount of bass extension. Be aware that after baffle step losses the sensitivity is no better than 83dB.
The 7in dia waveguide helps the tweeter to blend with an 8in woofer better using a 1.5khz crossover.
Here is the polar for the RS28F in WG300 and 6.5in woofer crossed at 3k5. Pushing XO to 1k5 and increasing 6.5in to 8in should be ok.
Just imagine the 6.5in woofer is now 8in RS225-8.
Passive XO for Time-Aligned RS225-8 and RS28F in Waveguide
The TL has been built and proven but probably rather large for the application here. However a smaller sealed or reflex alignment can be done. A 1.26 cubic ft box with reflex vent is 36Hz. 1.5 cubic foot might get to 32Hz. That’s a decent amount of bass extension. Be aware that after baffle step losses the sensitivity is no better than 83dB.
The 7in dia waveguide helps the tweeter to blend with an 8in woofer better using a 1.5khz crossover.
Here is the polar for the RS28F in WG300 and 6.5in woofer crossed at 3k5. Pushing XO to 1k5 and increasing 6.5in to 8in should be ok.
Just imagine the 6.5in woofer is now 8in RS225-8.
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A 1.4-1.5cuft volume cabinet 3-way using the ported RS225 + sealed RS150 + RS28F should give you the best sound using your drivers. You can search for completed crossovers for these popular drivers, or get crossover simulation help based upon a well braced cabinet design.
The "RS Duet" TL design by Paul Kittinger with the RS225 and RS28F won a prize at the 2012 Mid West Audio Festival, but from the photos it was a fairly large cabinet. From Paul's description in the video, the crossover sounded rather complex.
But I agree with Ralf - who really knows his stuff, I built one of his designs and it's very good - a three way might be an easier build.
The RS225 is really a 7" woofer if you look at the specs. A three way with the RS225, RS150 and the RS28 sounds like it would make a nice sounding, great looking speaker: the RS series really look rather good.
If you have a search and ask on the various forums, someone may have already done a project with those drivers.
Geoff
But I agree with Ralf - who really knows his stuff, I built one of his designs and it's very good - a three way might be an easier build.
The RS225 is really a 7" woofer if you look at the specs. A three way with the RS225, RS150 and the RS28 sounds like it would make a nice sounding, great looking speaker: the RS series really look rather good.
If you have a search and ask on the various forums, someone may have already done a project with those drivers.
Geoff
Ralf...... what sort of cabinet volumes am I looking at foir the 3-way? I just have this feeling that although I would love to try that configuration, it's going to be too big for the space these are going in.
The 150's or the 225's with the RS28's is sort of where I was thinking this would go. Didn't even think that about the 100's and the RS28's as wasn't sure how that would work out as the RS28's play fairly low.
The 150's or the 225's with the RS28's is sort of where I was thinking this would go. Didn't even think that about the 100's and the RS28's as wasn't sure how that would work out as the RS28's play fairly low.
Have a look here for a kind of cab that should work well with the RS225 when ported: SEAS-3-Way-Classic
You can achieve -6dB point under 30Hz that way.
OTOH, if you accept a -6dB point at around 45Hz you can build a sealed box of less than 20L (add some few L for the mid). Total height won't be much different, but you can make it slimmer than the former.
Anyway, the volume is dictated by what is needed by the RS225. If the above suggestions are too big, you can always build a 2-way with the RS150 in a 10L ported cab.
Ralf
You can achieve -6dB point under 30Hz that way.
OTOH, if you accept a -6dB point at around 45Hz you can build a sealed box of less than 20L (add some few L for the mid). Total height won't be much different, but you can make it slimmer than the former.
Anyway, the volume is dictated by what is needed by the RS225. If the above suggestions are too big, you can always build a 2-way with the RS150 in a 10L ported cab.
Ralf
When you look over Troels 3W-Classic 21.7" tall cabinet remember it uses a 4" midrange, and your RS150 has a 4.8" diameter cone and 5.9" diameter frame, so you should consider a ~23" tall baffle for your room integration measurements. Putting the tweeter at seated ear level ~36" - 39" is often recommended.
Also review the 3W-Classic mkII version which uses a stepped baffle to time align the tweeter and midrange in a effort to get linear phase with low part count LR2 crossover circuits.
SEAS-3-Way-Classic-mkII
Also review the 3W-Classic mkII version which uses a stepped baffle to time align the tweeter and midrange in a effort to get linear phase with low part count LR2 crossover circuits.
SEAS-3-Way-Classic-mkII
The RS225 simulates pretty well sealed in 17 litres. I am building a version of XRKs Fast waw but cannot go to the 22 litres or so of his design. The simulated difference in LF response isn't too drastic going from 22 to 17 litres and the Q remains a sensible value. (0.6 iirc)