diy speaker kit

Discussion in 'Home Theater Projects' started by Paul His, Feb 8, 2004.

  1. Paul His

    Paul His Agent

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    I'm looking for a speaker kit (or detailed plans/parts list) to build two main speakers.

    I'll build the cabinets (my main hobby is woodworking) and can assemble the electronics myself. However, I know nothing of crossover design, so I need a 'recipe'.

    I'm looking for a full range speaker (ie subwoofer not required) to listen to a wide range of music including rock, light rock, acoustic, jazz, etc, etc. I'd like it ideally to be a neutral or slightly warm sound - I'm really not fond of harsh and bright tweeters. I listen to music loud, but not beat-out-windows-crack-the-plaster loud. These speakers will likely be used as mains for home theatre also, but that's not my primary concern.

    My receiver is a Yamaha 3300 (130 watts/channel) and the room is approx 30' x 17' x 8' in the basement.

    Budget is approximately $500-$600 US, for drivers & electronics, not including cabinet, but is flexible - the Alpha LS is out of the question [​IMG].

    I've searched here and elsewhere and actually have found some options, but decided to post this in hopes of getting some specific recommendations for my situation.

    Recommendations, comments?

    Thanks,

    Paul
     
  2. Luitz

    Luitz Stunt Coordinator

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  3. Steve Elias

    Steve Elias Stunt Coordinator

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    You'll have to expand you budget, but North Creek has the Rhythm speaker kit (perhaps the Borealis as well) that should meet your needs. I suspect the DIY ProAc Response 2.5 may not fit your needs exactly, but it's also worth checking out. The price for the ProAc clone is variable depending on crossover parts, but I've calculated the version I plan to build at $700. All of the aforementioned sites/kits are well-thought of. Check out the GR-Research A/V-3 as well - highly thought of AND within the budget.

    http://www.northcreekmusic.com/NorthCreekKits.html

    http://www.geocities.com/diyproac25/

    http://www.gr-research.com/

    Steve
     
  4. Paul His

    Paul His Agent

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    Thanks for the responses. Some of these look interesting.

    I've also been looking at the Veritas (see speakerbuilder.net) It seems to be very close to what I'm looking for, although I'm a little concerned about the low-end (aka cheap) woofers and mid-range this design is based on.

    Anyone built or heard these Veritas?

    Paul
     
  5. ThomasW

    ThomasW Cinematographer

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    Historically I haven't been able to recommend THESE due to the cost of the drivers. Now, PE has replaced the expensive M8a, with the lower cost but performance equal M8n. The new driver is an electrical drop-in replacement. So the cost of the drivers plus XO's are now in your budget.

    The use of the dual 8" alu/mg woofers combined with the famous VifaXT25 tweeter, make these speakers literally state-of-the-art

    These are a true 'fullrange' high-end loudspeaker (retail speakers their equal would run ~$5000). Solid output to the low 30Hz range. They will indeed 'rock' if you want them to, but are also able to reproduce the subtle inner details of a chamber orchestra.

    Note that they are a true 4 ohm load, so make sure your receiver will be happy with that.......

    This is a true DIY speaker, we designed them for our friend Tibor, he's the 'proud' father in the pictures. We have box plans and crossover block diagrams available at no cost if you're interested. All the drivers and XO parts come from the usual suppliers (PE, Madisound, etc)
     
  6. Todd Shore

    Todd Shore Stunt Coordinator

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    Since no one has posted this one...

    Dennis Murphy's MB01

    He also has a 3-way variant. You can start with the MB01 and later modify it to 3-way by adding the bass cabinet and modifying the crossover.
     
  7. Luitz

    Luitz Stunt Coordinator

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  8. ThomasW

    ThomasW Cinematographer

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    Luitz

    Hi-Vi Research makes the woofers used in the Rocket and Swan designs. The tweeters are Vifa XT-25s.

    Tibor is a european trained and schooled cabinetmaker, so the fit and finish is pretty amazing. The pics don't do them justice...
     
  9. Paul His

    Paul His Agent

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    I was looking at the MB01 3-ways and noticed that the frequency response graph shows a drastic dip around 130 Hz - does that make sense?

    Paul
     
  10. Chris Keen

    Chris Keen Stunt Coordinator

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    ThomasW,

    I wouldn't mind putting together a set of those with that MTM setup. The m8n midwoofs are $48.70ea when four or more are purchased, and the XT25 tweets are $74.90ea for 1-3 quantity. In drivers, that's $172.30 in drivers (shielded versions) or $150.90 for unshielded. What do you guess the cost of the cross-overs to be for good quality?

    Did you and John (I think he was the other guru involved) make up a crossover to do a center channel based on these drivers and maybe a 3-way with mid involved? Just curious.

    Chris...
     
  11. ThomasW

    ThomasW Cinematographer

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    Chris,

    Yep we did a center, using the same drivers and same XO. That was the plan all along.

    And yep Jon did one of his famous Cauer/Elliptical XO's. The XO's design based on a variant of the article published in AudioXpress.

    XO cost is purely a function of what parts are used. Tibor was on a very tight budget. Given that multiple high value caps are needed for the design, we made big cluster caps by paralleling up bunches of the GE caps on sale at Madisound. Doing that makes caps that are 1/2 the cost of the designer brands. It also creates caps that are really high quality, with a VERY low ESR.

    For Tibor's inductors we used my power winder and made custom coils for him.

    Buying Solen or Dayton high value caps and factory made inductors will bump the XO cost up.

    HERE are block diagrams of the XO circuits. You can do the math for the components...

    BTW, the XO is optimized for the unshielded tweeters
     
  12. TedS

    TedS Agent

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    Paul,

    On the Madisound Audio Discussion Board, Dennis explained that the dip at 130 Hz is the result of cancellation due to floor bounce in his measurement setup. I'm sure you wouldn't see that if he did a near-field measurement. Floor bounce is present in most rooms, but the frequency it occurs at and whether it's even audible may vary. I've built the MBOW1 and am very satisfied. I plan to do the 3-way conversion when time and funds are available.

    Ted
     
  13. Paul His

    Paul His Agent

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    Thanks Ted,

    Paul
     
  14. ThomasW

    ThomasW Cinematographer

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    For those that missed the jump to hyperspace..........

    The Hi-Vi M8, Vifa XT-25, MTM thread is off and running HERE
     
  15. cacu

    cacu Stunt Coordinator

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    ThomasW,
    I'm interested in doing the m8n MTM for my next project. Would you kindly share the cabinet design?
    Thanks
     
  16. ThomasW

    ThomasW Cinematographer

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    Click on the HERE hyperlink in my post above yours
     
  17. Bob K

    Bob K Stunt Coordinator

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    Paul,

    They're not often mentioned here, but take a look at Pi Speakers, http://www.pispeakers.com , particularly the Studio 2s and Theater 4s. They are quite sensitive and with your amp should provide plenty of bass, no sub required.
     
  18. PaulT

    PaulT Supporting Actor

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  19. Aaron Howell

    Aaron Howell Stunt Coordinator

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    Sorry to dig this thread up, but I'm considering my next set of speakers.

    I'm not a member of the other board, so I am asking here. What kind of power does it take to get these up and running, and what will they take long term? Would a NAD c370 be up to the job on it's own? I have a NAD c270 I could mate with it, but I unfortunatly can't be in control of the volume at all times. Already had damage occur that way once.

    Thx.
     
  20. ThomasW

    ThomasW Cinematographer

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