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RSS315HF-4 as the anchor of a 3-way???

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  • Pete Schumacher
    started a topic RSS315HF-4 as the anchor of a 3-way???

    RSS315HF-4 as the anchor of a 3-way???

    Well, I've been contemplating a 3-way with the RSS315 for a while now. I modeled up what I'd consider a fairly beefy setup. 3 cubic feet tuned to 16.5Hz using a 15" PR from AE Speakers. Baffle diffraction simulations were generated with Jeff B's tools and BDS, traces taken from Zaph and PE for the mid, tweet, and woofer respectively.

    200 and 1400Hz on the XO points.

    It might be here sooner than I thought!!!


  • Pete Schumacher
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Originally posted by r-carpenter View Post
    Hi Pete.
    I was looking for the actual measurements of this monster. Can you point me to them? Dumb me can't find the darn thing.
    Thanks, R.
    They're back on page 8. Those PCD plots were from measured data.

    We also got these plots of the system, before the final adjustments to the crossover using the individual plots in PCD.

    Leave a comment:


  • r-carpenter
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Hi Pete.
    I was looking for the actual measurements of this monster. Can you point me to them? Dumb me can't find the darn thing.
    Thanks, R.

    Leave a comment:


  • Pete Schumacher
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Originally posted by NEO Dan View Post
    Hi Pete,
    I noticed that in the end you made a couple cuts to the mid level, with that in mind do you feel the 4Ω woofer could be used instead for an overall increase in sensitivity?
    Possibly.

    One might be able to keep the transfer functions for the mid and tweet while adding 3dB, but it wouldn't be easy. It looks like there might be just enough room to do it, but there's no margin for error.

    Moving to the RS28F might help as well.

    Leave a comment:


  • NEO Dan
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???
    Hi Pete,
    I noticed that in the end you made a couple cuts to the mid level, with that in mind do you feel the 4Ω woofer could be used instead for an overall increase in sensitivity?

    Leave a comment:


  • Pete Schumacher
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Originally posted by superspeeder View Post
    Sort of off topic, what do you think of the RSS390's for use as the bottom of a 3-way similar to what you've done with the B's? Or is there something really special about that 8 ohm RSS315 that makes it stand out?
    I'm sure the RSS390 would work to 350Hz as a woofer. Someone on here actually built a setup using the RSS390, a pair of RS180 and the RS28.

    The 8 Ohm version gave me the option for an easier load, and a bit more leeway in dialing in a match to the mids. But the motors in all of them are of the same design, good performers, good cones, and good suspensions.

    Leave a comment:


  • superspeeder
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    I'm thinking AE Lambda 15 OB for the woofer.
    Sort of off topic, what do you think of the RSS390's for use as the bottom of a 3-way similar to what you've done with the B's? Or is there something really special about that 8 ohm RSS315 that makes it stand out?

    Leave a comment:


  • Pete Schumacher
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Originally posted by jonasz View Post
    And what for mid and tweeter?
    Haven't decided yet. The OB 15 is only 90dB, so I have a lot of options open to me.

    Leave a comment:


  • jonasz
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Me too. My cabinet maker for these is about 500 miles to the north. Had to make a drive to InDIYana to pick them up last April. He wants to build an OB version I've already drawn up, using the same construction techniques: curved front baffle made from layered HDF/epoxy. Not sure when he'll start fab, but it should be fairly soon. I'm thinking AE Lambda 15 OB for the woofer.
    And what for mid and tweeter?

    Leave a comment:


  • Pete Schumacher
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Originally posted by captainobvious99 View Post
    I'm sure the curved cabinet design also contributes to the stiffness.

    15" OB version...yes please.

    I wish I had someone in my area to aid in the fabrication of enclosures for me as my woodworking skills leave alot to be desired... :o
    Me too. My cabinet maker for these is about 500 miles to the north. Had to make a drive to InDIYana to pick them up last April. He wants to build an OB version I've already drawn up, using the same construction techniques: curved front baffle made from layered HDF/epoxy. Not sure when he'll start fab, but it should be fairly soon. I'm thinking AE Lambda 15 OB for the woofer.

    Leave a comment:


  • captainobvious99
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Thanks. Yes, Keith Don't Go. Used part of that track in Iowa during the 10 minute demo.

    I got lots of great feedback on the sound from the attendees in Iowa. I was absolutely honored to receive the most votes for "System I'd like to have in my living room." And because there was a collective effort on the part of 3 guys, (D,Rose - Cabinets; DoubleTap - voicing advice), I can only claim a part of the honors. The cabinet is unquestionably a great non-contributor to the sound, being very stiff, very heavy, and very dead. Not easy to do given the size.

    Now, the tough part is coming up with something else to top these.

    How about a 15" OB version?
    I'm sure the curved cabinet design also contributes to the stiffness.

    15" OB version...yes please.

    I wish I had someone in my area to aid in the fabrication of enclosures for me as my woodworking skills leave alot to be desired... :o

    Leave a comment:


  • Pete Schumacher
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Originally posted by captainobvious99 View Post
    I think you mean "Keith Don't Go" ;)
    What a terrific, dynamic recording that is too. One of my favorites for testing.
    Steve Dont Go is what my fiance says to me when I talk about going out to play sports :p

    Congrats on a great job Pete. They look, and judging by your modeling- probably sound fantastic as well.



    -Steve
    Thanks. Yes, Keith Don't Go. Used part of that track in Iowa during the 10 minute demo.

    I got lots of great feedback on the sound from the attendees in Iowa. I was absolutely honored to receive the most votes for "System I'd like to have in my living room." And because there was a collective effort on the part of 3 guys, (D,Rose - Cabinets; DoubleTap - voicing advice), I can only claim a part of the honors. The cabinet is unquestionably a great non-contributor to the sound, being very stiff, very heavy, and very dead. Not easy to do given the size.

    Now, the tough part is coming up with something else to top these.

    How about a 15" OB version?

    Leave a comment:


  • captainobvious99
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Originally posted by Pete Schumacher

    The guys at Scanspeak really got the name of the Revelator line right. They reveal detail and presence unlike most anything else out there. Vocal reproduction is so smooth and easy. And the sound of Nils Lofgren's live acoustic guitar in "Steve Don't Go" is as close to perfection as I can imagine. Tory Amos in "Pancake" is riveting, her voice doing harmonic stuff that just makes my jaw drop. I've been limiting myself to 45 minute sessions to keep my ears fresh, but I could just go for hours, especially with really engaging recordings.


    I'm now to the point where I like them so much that I don't want to stop listening, disassemble, and then wipe the finish on them.
    I think you mean "Keith Don't Go" ;)
    What a terrific, dynamic recording that is too. One of my favorites for testing.
    Steve Dont Go is what my fiance says to me when I talk about going out to play sports :p

    Congrats on a great job Pete. They look, and judging by your modeling- probably sound fantastic as well.



    -Steve

    Leave a comment:


  • Pete Schumacher
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Originally posted by raiderone View Post
    Thanks for posting the schematic. Not too many components and without huge cap and coil values.
    Well, I do have 75uF and 60uF poly caps. They certainly make a statement on the XO board. The 4mH and 5mH inductors can also get large if not iron core.

    Leave a comment:


  • raiderone
    replied
    Re: RSS315HF-4 as the anchor of a 3-way???

    Thanks for posting the schematic. Not too many components and without huge cap and coil values.

    Leave a comment:

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