fec Posted January 28, 2003 Share Posted January 28, 2003 Good morning - I often read, but rarely post, but today I need opinions and advice. I am considering putting two heresy cabinets together with one set of drivers. I have a great sounding abused cabinet set of heresys and have found an empty set of cabinets. My idea is to join one loaded and one unloaded cabinet together. Any thoughts? I've read here that the box is too small for the woofer to realize it's full potential and the purpose would be to improve the low end. 1 Quote Link to comment Share on other sites More sharing options...
Invidiosulus Posted January 28, 2003 Share Posted January 28, 2003 fec, I am by no means an expert in these matters but from what I have heard the size of the box for the heresy and the fact that it is a sealed box help to limit the excursion of the woofer, the airtight box acting as a cushion behind the woofer to help keep it from bottoming out.. I think this is true for the K-22- type woofers although I believe there is an industrial version of the heresy that is ported and has a different woofer. Like I said' I'm no expert and someoneelse can propably chime in with some more specific info. Peace, Josh btw, welcome to the forum. Quote Link to comment Share on other sites More sharing options...
lynnm Posted January 28, 2003 Share Posted January 28, 2003 Josh you are spot on. Putting that Heresy woofer in an oversized unsealed box would result at best in crappy bass response and could easily result in damage to the driver. Quote Link to comment Share on other sites More sharing options...
fec Posted January 28, 2003 Author Share Posted January 28, 2003 ah - i left out some info. I'd planned to maintain a sealed enclosure. (close up the holes. i'd read here before, i believe, that that woofer needed more space (in a sealed enclosure). in detail, i thought i would cut matching circles in the ends of the two cabinets to 'mate' them, then take the back off of the one that would have no drivers, then cover those holes with plywood cut to fit. i hope that makes sense. 1 Quote Link to comment Share on other sites More sharing options...
JohnA Posted January 28, 2003 Share Posted January 28, 2003 A Heresy woofer *might* provide louder, deeper bass in a larger cabinet, not twice as large! This is a recipe for garbage. What you should do is put the components in the nice cabinets and modify the crossover. I have 4 Heresies in my HT and have looked over the crossover. The squawker and tweeter are run 4 dB hotter than the woofer. I have a schematic I'll upload with simple mods to correct that. Similar mos have been discussed on the BBS before now. Look for the new thread. I have also designed a new circuit (with a LOT of help) that requires replacing most of the parts that will be a proper crossover. It will be more expensive, but should sound better. I'm waiting on parts. Quote Link to comment Share on other sites More sharing options...
j-malotky Posted January 28, 2003 Share Posted January 28, 2003 fec If I were you I would leave the Heresy alone. If you need more bass, I would add a subwoofer, or look at upgrading to a Forte. The Forte is basically a Heresy with more bass. A very nice speaker. JM Quote Link to comment Share on other sites More sharing options...
Mike82 Posted January 29, 2003 Share Posted January 29, 2003 I pretty much agree with the other posters. Woofers have different "Qs" which permit them to be used in either a sealer or open box. I think if you changed the internal volume of the Heresy, you would screw up the sound. Jogn's crossover mod is probably a better fix. Quote Link to comment Share on other sites More sharing options...
moray james Posted June 8, 2011 Share Posted June 8, 2011 Welcome to the forum. It's my understanding that if you want more bass extension you will have to trade output level to get it (efficiency). A better solution would be to add one or more subwoofers to the system. That way you maintain system efficiency as well as gain bass extension. The woofer in your Heresy can be tuned lower and can even be used in a reflex design. Dave Harris of this forum (Got Hover) has a great site and a design you might like to have a look at here http://mysite.verizon.net/res12il11/id76.html . In most cabinets a shift of 2% or less is not generally considered an issue as far as tuning goes. Damping material can in theory provide as much as 20 - 25% apparent increase of volume though in practice it probably tops out at around 20% (fully stuffed box). I am in the process of helping my brother rework a set of Quartet cabinets. The cabinets are now very well braced and reinforced, total amount of material used internally is just over 4% of the cabinet volume. That amount of volume can easily be made up with added damping material. Will post pictures in another week or so in case anybody is interested to have a look. Hope this helps. Best regards Moray James. Quote Link to comment Share on other sites More sharing options...
Groomlakearea51 Posted June 9, 2011 Share Posted June 9, 2011 Moray, the thread is from 2003.... Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted June 9, 2011 Share Posted June 9, 2011 FEC, The thought is a good one, in principle. The Heresy cab is not optimal for the K-22 woofer and the bass extension is limited because of that. As others have mentioned, adding the second cab would be too much volume and not a satisfactory solution. If you are up to building new cabs altogether, both the Klipsch forte and (now I've had an attack of amnesia) have cabs built which are of optimal volume for this woofer. Also a search of the archives should turn up a thread or two by Al Klappenberger who built a "Heresy on Steroids" which also used cabs of optimal volume for the K22. I got a sub dialed in for use with my Heresy speakers and am pleased with the results. Quote Link to comment Share on other sites More sharing options...
moray james Posted June 9, 2011 Share Posted June 9, 2011 Ok so you are going to get picky about a date. I guess these things pop up from time to time so maybe the thread is going to be useful to someone who is reading. It's all good. I will have to watch those thread dates more carefully. Best regards Moray James. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted June 9, 2011 Share Posted June 9, 2011 I think the original post is a great idea. I have a few cabs laying round and was going to do something similar. Quote Link to comment Share on other sites More sharing options...
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