imperyal Posted March 8, 2023 Report Share Posted March 8, 2023 Hello!I'm in the process of buying or building a pair of subs to use with the EV ELX200 15inch speakers I recently bought second hand.The speakers can be replaced in the future so, for the subs I don't mind to go a little overkill. A friend of mine recommended this forum and talked lots about @Ricci and his sub designs…I think it would be better to build instead of buying because of my requirements: 18inch woofer Max weight 35Kg each box Small size, under 24inches (bigger side of the box) SPL 130db+ Frequency response down to 40hz (-3db) Active would be great, but passive would be acceptable A tried and tested design would be ideal Budget, 2000€ for two Subwoofers I was considering EV EKX18SP Subwoofers, people seem to like them. But I think I can have better Subwoofers for less money if I build them myself. Two EKX18SP units will cost 2600€ here in Portugal... A box size and weight similar to the EKX18SP but with better woofer and amp would be a good start.. EKX18SP size: 520 mm (20,47 ") x 606 mm (23,86") x 612 mm (24,09 ") EKX18SP weight: 33Kg I'm currently looking at this woofer: B&C Speakers 18TBW100, 4 ohm, 18 inch Amps: Chinese plate option (with good references): GETSHOW 2400W Subwoofer Amplifier Module Behringer Inuke nx6000D (DSP version): Behringer NX6000D Thank you in advance! Quote Link to comment Share on other sites More sharing options...
peniku8 Posted March 8, 2023 Report Share Posted March 8, 2023 I don't have time to answer to everything, but I noticed you're looking to build an extremely light subwoofer, but the driver you're looking at has a ferrite magnet and it's almost 18kg. I'd recommend looking at something like the 18NW100, 18NBX100 or 18DS100 instead. You'll be saving 7-8kg on the driver alone and in the instance of the 18DS100 you're getting more performance (but it's 100€ more per driver). For pro audio subs I'd never go with ferrite drivers, unless weight is a non-concern (which it almost always is). That being said, 35kg is a low target. You'll need to make it from relatively thin (12mm?) BB ply and have good cross-bracing inside to keep it from flexing. Quote Link to comment Share on other sites More sharing options...
imperyal Posted March 8, 2023 Author Report Share Posted March 8, 2023 Thank you for your replay @peniku8 😀 The EV EKX18SP uses 15 mm plywood, ferrite magnet and it is 33Kg. The size of the magnet will be much smaller then the one on the 18TBW100 woofer. That woofer is 8ohm, 400w continuous, 1600W peak. It costs around 200€ to replace. I have a link to that: EV evs-18c woofer (used on EKX18SP). Yeah, the 18NW100 or 18NBX100 should outperform the woofer used on the EV sub, and they would match better with the plate amp I'm considering using. I've looked at those, they have 2/3mm less Xmax compared to the 18TBW100. But all 3 woofers say they will survive 57 mm peak-to-peak before damage... Quote Link to comment Share on other sites More sharing options...
neo2015 Posted March 8, 2023 Report Share Posted March 8, 2023 The @Ricci CKRAM would be an excellent choice, but it uses a 21" driver, and will probably be heavier than what you are looking for : https://data-bass.ipbhost.com/topic/868-riccis-ckram-subwoofer-and-files/ Is there a way to adapt the CKRAM to use a 18" driver? Quote Link to comment Share on other sites More sharing options...
imperyal Posted March 9, 2023 Author Report Share Posted March 9, 2023 I found some commercial designs on youtube.. JBL: EV: YAMAHA: They are "simple" builds.. What do you think? I like the JBL and EV horizontal style better.. (This guy's channel is full of plans...) As I mentioned, I would prefer to use a tried and tested design... Quote Link to comment Share on other sites More sharing options...
imperyal Posted April 6, 2023 Author Report Share Posted April 6, 2023 Just a quick update, I'm settling for a box with 164L of volume tuned to 37Hz (bracing accounted for). Take a look at the Sketchup drawings... Do you see any problems? Thank you! Quote Link to comment Share on other sites More sharing options...
peniku8 Posted April 6, 2023 Report Share Posted April 6, 2023 Why the double baffle? What's your panel thickness? Quote Link to comment Share on other sites More sharing options...
imperyal Posted April 9, 2023 Author Report Share Posted April 9, 2023 The material thickness will be 15mm… the double baffle will add little extra weight. Quote Link to comment Share on other sites More sharing options...
imperyal Posted May 2, 2023 Author Report Share Posted May 2, 2023 Another update... I will start building soon. I already have the woofer, and the amplifier is on its way. It wouldn't be a proper DIY build if the photos weren't taken on a kitchen or dining table 😉 Quote Link to comment Share on other sites More sharing options...
rolo95 Posted July 15, 2023 Report Share Posted July 15, 2023 So....how are you going. Quote Link to comment Share on other sites More sharing options...
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