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In Reply to: Building subwoofer cabinets posted by Beginner on February 26, 2007 at 07:25:38:
Search the web for all the details about various types of subwoofers ("DIY subwoofer") or purchase Vance Dickason's speaker design book. If you want an easy high quality subwoofer kit, give one of the Parts Express Titanic kits(www.partsexpress.com)a try. Good luck!
Follow Ups:
I bought a pair of brand new subwoofers with a cherry veneer to match my 7 Hales speakers for my HT use for ~$450 to my door. Not the best performing subwoofers in the world, but they easily bettered the performance and sound quality of my single JBL 12" subwoofer. They are a steal at these closeout prices. I have no affiliation with the seller. I am just a happy end user. Why not crunch the numbers for your parts list, and add up all the costs for the drivers, mdf, plate amps, crossovers, and your time designing and building the cabinets. The Parts Express kits are rated very good. But for plug and play ease these on close out are a real bargain. I use them in my HT but they would work for 2 channel also. Had I read the page more clearly I would have paid for them with a postal m/o and saved on shipping costs when I ordered them from Paul. Good luck! John
thanks but I have no interest in HT. I will build something that captures the opening of Bruckner's 7th.
They are not HT only subwoofers. Whatever. They go lower and cleaner than my old JBL 12" subwoofer did. I do not need subwoofers for my dedicated 2-channel stereo only speakers in another room. Good luck and build away. Will your design get down to 25Hz? There was a company on AudioGon selling the same cabinets as PartsExpress since they made them. They had them for sale a few months ago. That would save you lots of labor alone. DIY away and enjoy your Bruckner. John
Hi, I don't want a kit. I want to know what it means when people say that a cabinet is tuned to a certain frequency, and how you do this with a sealed cabinet. Thanks
Perhaps it means that the woofer & cabinet combo has a particular low frequency cut-off point. The neccesary text & formulae to explain how this is accomplished & measured takes at least several pages or even a chapter, thus the advice to read a print book on the subject. It is far too simple to state a larger box lowers the cut-off point or a smaller box raises it. Dickason's book is on-sale @ madisound.com/
ok, ok, thanks for help. i'll buy the book.
In a sealed-box system, the cabinet affects the resonance frequency of the speaker by increasing the stiffness of the suspension. You cannot accurately speak of the cabinet frequency in isolation, only in the context of a system resonance of the speaker/box system.The speaker's resonance frequency is also not very relevant, except in the context of the speaker/box system.
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