CRS 4.1TL - Matching Subwoofer Project

JayMX
JayMX Posts: 446
in Vintage Speakers
Ok gurus. I think I'm going to pull the trigger on a project that's been brewing in by brain for a long time. Need your guidance and suggestions...

Awhile back, I picked up a nearly perfect pair of oak CRS+ (still have the cardboard shims between the grilles and the bezels) basically brand new... I have since acquired a pair of Gimpod boards, 198's, VR3 input plates, and a full set of Larry's rings. Still need subbass inductors, resistors, caps, wiring, and terminals. Not sure if a Dreadnaught is necessary now, but perhaps for phase II.

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Here's the plan. I found that my 2.3TL's were just too much for my room and have reserved them in storage for now, but I've been missing SDA something fierce. So I will dive in and do a full update to 4.1TL and build a pair of matching, passive subs for them to sit on. The space I have to work with is approx 20"x20"x24". I don't have to build the cabinets to the full size, but it would be possible to fill the area completely if necessary. I will probably refinish/finish everything in walnut with silver accents. Thinking spikes between the subs and the CRS's for looks as much as isolation (and to hold them in place...)

Here's the ask. The concept diagram below is just that, a concept. I need suggestions for the best most chest-pounding type of configuration you guys can recommend. I have a pair of GFA555II's that I plan on powering the stacks with. One for the CRS's and one for the subs. Thinking miniDSP or something of the like to handle the curves. I really don't care about super low bass, but if they could dig down into the 30Hz realm and still hit hard, I would be 100% ok with that.

If this was your project, what type of cabinet configuration, driver combination would you consider and why?

kh482laedi83.png
Current Collection: Monitor 4a (Peerless), Monitor 5B (Peerless), Modified Monitor 7b (Peerless), RTA15TL (SL3000), SDA CRS+ (194’s), SDA SRS 2.3TL, R100's, R200’s, R300 🤩
Pairs that have passed through: Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL1000), Monitor 5b (SL2000) (4x pair), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s), Monitor 10a (Peerless), Monitor 10b (5x pair), RTA8, RTA8TL, RTA 11T, RTA12c (194's), SDA CRS, SDA 2 (2x pair), SDA 2a, SDA 2b, SDA 1b, SDA 1c, SDA SRS 2 (2x pair), SDA SRS 3.1TL (198’s) (2x pair)...and more to come, it’s a sickness.
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Comments

  • VR3
    VR3 Posts: 28,755
    Imo, I would stick with stands then free the subs up to go in the best location of the room. Where the speakers sound best is rarely where the subs sound best.

    If adamant on this, I would go for dual 8s in a sealed enclosure for music m maybe dual 10s
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • rooftop59
    rooftop59 Posts: 8,121
    edited August 19
    VR3 wrote: »
    Imo, I would stick with stands then free the subs up to go in the best location of the room. Where the speakers sound best is rarely where the subs sound best.

    that's why you cut your massive speakers in half and move the woofers into a different spot in the room? 😂

    For me it's less dual subs than it is making your monitors full range....

    I did something similar with 8 inch sealed subs. Dirac Live (or something like REW) is absolutely necessary in my room, and that probably has something to do with placement, but also just overall integration. Without dirac my subs fall off a cliff at 30hz, with it they are basically flat to 20hz, and everything is just more coherent and integrated.

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    Post edited by rooftop59 on
    Living Room 2.2: Usher BE-718 "tiny dancers"; Dual DIY Dayton audio RSS210HF-4 Subs with Dayton SPA-250 amps; Arcam SA30; Musical Fidelity A308; Sony UBP-x1000es
    Game Room 5.1.4:     Denon AVR-X4200w; Sony UBP-x700; Definitive Technology Power Monitor 900 mains, CLR-3000 center, StudioMonitor 350 surrounds, ProMonitor 800 atmos x4; Sub - Monoprice Monolith 15in THX Ultra
    Bedroom 2.1     Harmon Kardon HK3490; Bluesounds Node N130; Polk RT25i; ACI Titan Subwoofer
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  • xschop
    xschop Posts: 5,000
    I vote dual LF-14's B)
    Don't take experimental gene therapies from known eugenicists.
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  • VR3
    VR3 Posts: 28,755
    The grandes are unique in that they are actually putting 4 woofers in different parts of the room. Their in room bass response is great.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • JayMX
    JayMX Posts: 446
    VR3 wrote: »
    If adamant on this
    I totally get the non optimal placement thing, but with my room the way it is, this configuration physically fits best. I have other subs in the space for HT. These would be purely for the stereo experience. I really want concussion…

    Current Collection: Monitor 4a (Peerless), Monitor 5B (Peerless), Modified Monitor 7b (Peerless), RTA15TL (SL3000), SDA CRS+ (194’s), SDA SRS 2.3TL, R100's, R200’s, R300 🤩
    Pairs that have passed through: Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL1000), Monitor 5b (SL2000) (4x pair), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s), Monitor 10a (Peerless), Monitor 10b (5x pair), RTA8, RTA8TL, RTA 11T, RTA12c (194's), SDA CRS, SDA 2 (2x pair), SDA 2a, SDA 2b, SDA 1b, SDA 1c, SDA SRS 2 (2x pair), SDA SRS 3.1TL (198’s) (2x pair)...and more to come, it’s a sickness.
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  • xschop
    xschop Posts: 5,000
    Any previews Jay, or you just gonna debut the whole jaw-dropping package at once?
    Don't take experimental gene therapies from known eugenicists.
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  • JayMX
    JayMX Posts: 446
    I picked up some 198's from @Toolfan66 the other day for the CRS 4.1 TL portion of the project. Still doing research on the subs. I'm now considering doing a pair of Rythmik GRci kits. Servo subs have always intrigued me, sealed enclosures would be simpler, and their amps have a lot of tweakability... Thoughts anyone?

    https://www.rythmikaudio.com/GRci.html
    Current Collection: Monitor 4a (Peerless), Monitor 5B (Peerless), Modified Monitor 7b (Peerless), RTA15TL (SL3000), SDA CRS+ (194’s), SDA SRS 2.3TL, R100's, R200’s, R300 🤩
    Pairs that have passed through: Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL1000), Monitor 5b (SL2000) (4x pair), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s), Monitor 10a (Peerless), Monitor 10b (5x pair), RTA8, RTA8TL, RTA 11T, RTA12c (194's), SDA CRS, SDA 2 (2x pair), SDA 2a, SDA 2b, SDA 1b, SDA 1c, SDA SRS 2 (2x pair), SDA SRS 3.1TL (198’s) (2x pair)...and more to come, it’s a sickness.
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  • F1nut
    F1nut Posts: 50,654
    JayMX wrote: »
    I picked up some 198's from @Toolfan66 the other day for the CRS 4.1 TL portion of the project. Still doing research on the subs. I'm now considering doing a pair of Rythmik GRci kits. Servo subs have always intrigued me, sealed enclosures would be simpler, and their amps have a lot of tweakability... Thoughts anyone?

    https://www.rythmikaudio.com/GRci.html

    Get this and be done.
    https://www.rythmikaudio.com/F12SE.html
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • JayMX
    JayMX Posts: 446
    F1nut wrote: »

    Get this and be done.
    https://www.rythmikaudio.com/F12SE.html

    ...but i want to build my own pretty boxes that are 20" wide to match the width of the CRS's. And I don't want piano black.

    Thoughts on the CI drivers vs the GR paper cone drivers? What about forward or down firing? This is all just an exercise in imagination at this point. :)
    Current Collection: Monitor 4a (Peerless), Monitor 5B (Peerless), Modified Monitor 7b (Peerless), RTA15TL (SL3000), SDA CRS+ (194’s), SDA SRS 2.3TL, R100's, R200’s, R300 🤩
    Pairs that have passed through: Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL1000), Monitor 5b (SL2000) (4x pair), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s), Monitor 10a (Peerless), Monitor 10b (5x pair), RTA8, RTA8TL, RTA 11T, RTA12c (194's), SDA CRS, SDA 2 (2x pair), SDA 2a, SDA 2b, SDA 1b, SDA 1c, SDA SRS 2 (2x pair), SDA SRS 3.1TL (198’s) (2x pair)...and more to come, it’s a sickness.
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  • txcoastal1
    txcoastal1 Posts: 13,306
    Keep in mind you will need to compensate the dimensions internally pending on the subwoofer driver to provide a tight bass

    21” cabinet is wide so height and depth will be important. Cabinet will likely need false walls, which is not a bad thing, as it will provide bracing

    I do like the idea, but it is more than just throwing a woofer in a box for aesthetics
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
    Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
    Gear on standby: Melody 101 tube pre, Unison Research Simply Italy Integrated
    Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers, Modwright LS100 (voltz), Simaudio 780D DAC

    erat interfectorem cesar et **** dictatorem dicere a
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  • F1nut
    F1nut Posts: 50,654
    ^This^

    If you go forward building your own, front firing is king.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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