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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: decent measuring mic posted by Russ57 on January 25, 2007 at 04:30:04:
Hi ,
The Behringer ECM8000 is around $60 , it is phantom powered so requires a suitable 48V mic pre also fairly inexpensive . I'm buying one once the next amp gets built . I think I've finally sussed my step network/crossover problem . It was not just the pad but also the order of network . Originally I used 1st order on both bass and HF and just couldn't get rid of a nasty bit of harshness . I then went 2nd order on the bass , 1st order for HF . Played around with phase , series cap etc . I'm now using the HF drivers (TAD TD4001) as nature intended : 650Hz 2nd order , plumped for a Linkwitz Riley alignment . On the bass unit I've had to apply a zobel , I believe this is required due to the high output impedence of my current amp (4 ohms!) combined with a peaky woofer response . For the bass I'm also now using symetrical pairs of gapped 2mH 20A C-core chokes which measure as close to 0 ohms DCR as I've ever seen with an inductor , every little bit helps . By the way get those dustcore ferrites out of your bass crossover , they're all horrible sounding ! Horns I'm using are 340hz Azura with LeCleach profile , the ones with a large roundover ;) Slightly beamy at the top registers but at present I don't feel the urge for a supertweetps TADs are pretty cheap second hand and are well worth considering . Your side of the pond the things are only $450 each for good ones , $300 for a blown one , Radian diaphragms are fairly inexpensive replacements though
cheers
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Follow Ups
- Re: decent measuring mic - fatbottle 05:02:27 01/25/07 (2)
- You need more than a "decent measuring mic". - cheap-Jack 08:54:16 01/25/07 (1)
- Re: You need more than a "decent measuring mic". - fatbottle 09:12:34 01/25/07 (0)
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