Greetings – I am new to this forum as well as the modern world of DIY. I was active 25 years ago in DIY audio, but career etc., needed to take first priority. At any rate, I am interested in building a pair of SEAS Thor speakers using the Madisound kits. I have seen several post on the general speaker designs, but few on the actual Madisound kit. Any comments or concerns about these speakers? I currently have a pair of Revel F12s that I would be using for comparison. Thanks in advance!
Here's the Madisound kits in boxes derived from Martin King and all the commentators on the Thor thread. Make sure to visit Martin's site www.quarter-wave.com
An externally hosted image should be here but it was not working when we last tested it.
Buy the Thor kit but build a Fat or Short or Small cabinet ... I built the Small's and they blow the standard box across the road.
see for the build and links back to the theory etc at this forum ... http://www.greenie512.net/greenie512/html/small_thor.html
see for the build and links back to the theory etc at this forum ... http://www.greenie512.net/greenie512/html/small_thor.html
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Toxdoc said:
The original Joe d'Appolitto box does not work well (this one is what is at Madisound). It will get you anechoic bass to 100 Hz (as measured in SEAS anechoic chamber)
If you are thinking of upgraded XO parts you might also want to look at the modified XO. A link near the end of the main revisting the Thor thread, I think.
dave
Attached is a picture Planet10 did of the new crossover I designed. All the information is at the following link:
http://www.htguide.com/forum/showthread.php4?t=26754
BTW, I was working on a reduced baffle step version. I could only come up with 1 dB less baffle step. Otherwise, the entire design would have to change and I couldn't verify the results. The simple change is using Madisound 16 AWG sidewinder coils instead of the Erse 14 AWG in series with the woofers. This adds to the DCR, thus provides the identical response, with 1 dB less baffle step. In my room, I prefer the balance with the 16AWG sidewinder coils and would recommend this, and it saves about $50 in crossover parts too! The sensitivity about 85 dB.
http://www.htguide.com/forum/showthread.php4?t=26754
BTW, I was working on a reduced baffle step version. I could only come up with 1 dB less baffle step. Otherwise, the entire design would have to change and I couldn't verify the results. The simple change is using Madisound 16 AWG sidewinder coils instead of the Erse 14 AWG in series with the woofers. This adds to the DCR, thus provides the identical response, with 1 dB less baffle step. In my room, I prefer the balance with the 16AWG sidewinder coils and would recommend this, and it saves about $50 in crossover parts too! The sensitivity about 85 dB.
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