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Old 23rd October 2002, 06:02 AM   #31
navin is offline navin  India
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hey dont trash it.

I managed to un dent a TI 19mm tweeter dome. I assume the process is the same.

it require time and patience and a soft hand. if you know someone how build clay pots or a surgeon ask them (my sister and aunt helped me) their hands are softer than our "industrial duty lumber jack hands". My aunt's words not mine.

they went by feel and pressed the edge where the dent meets the undented part. a small part of the dented dome got undented. then slowly they pressed at another edge and after abot 10-15 mins they had it un dented again.

If the dustcap is too rigid to do that try this.

1. make a pin prick in the dust cap.
2. take a paper pin and bend it at 110deg or so. (more than 90 deg.
3. insert pin in pin prick
4. try and pull the dent out.

I have not tried this but I have heard it works.

BTW I am trying to get recoil kits for my drivers. Living in India where import laws and duties and taxes are high and value of local currency is very low we are very careful about throwing anythig away.

If you know wher to get recoil kits for 8" Focal woofers or 6" Audax mids let me know. I have ahd the Focal wofoers since 1987 and the Audax mids since 1996.
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Old 23rd October 2002, 06:29 PM   #32
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I don't know where to get cones for those specific speakers. I'll use the 8" woofers for something eventually I guess. If I add mass to the cones I might be able to make subs out of them.

Alvaius, Please let me know when you finish those cross-overs. My e-mail is tlucko@hotmail.com
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Old 24th October 2002, 05:49 AM   #33
navin is offline navin  India
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adding mass might reduce Fs but also reduces the Acceleration Factor. It will be a limited sub.
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Old 24th October 2002, 07:48 AM   #34
Al.M is offline Al.M  Myanmar
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Default Another DIY 3 way

Here's a project that I've been working on for some time (yrs).

http://groups.msn.com/berryliumthing...iumheilss.msnw

Consists of an old Yamaha NS1000 berylium dome mid, now a Raven R1 tweeter (in photo Heil AMT1c) & 2 Scanspeak 18w/8535 woofers. Sound is quite good considering my backyard crossover skills, but still needs more development. The idea was to combine the attributes of 2 of my favourite speakers, Proac 2.5 & Yamaha NS1000M, resulting in similar mid/treble detail & flowing bass.
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Old 24th October 2002, 09:25 AM   #35
navin is offline navin  India
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how do you compare the 8535 with other SS esp the 8545 and 8546.
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Old 25th October 2002, 04:16 PM   #36
Al.M is offline Al.M  Myanmar
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8535 has a similar tonal balance to the 8545K (have not used/heard the others), but much more extended bass. Its designed to go into a 40L box, compared to the 8545K in around 20L.

Until the virtues of the 8535 were shown in the DIYproac25 website most people have been using the 8545.
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Old 31st March 2003, 08:00 PM   #37
Bricolo is offline Bricolo  France
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Default Re: Re: Crossover order and phase question

Quote:
Originally posted by planet10
For every pole (ie order) there is a 90 degrees phase shift. A 1st order XO is inherently phase correct (assuming everything is lined up & you have perfect drivers).

If you go to the FRD Group and download the passive crossover design calculator, it has many of the text book filters. There is a set of accompanying pictures to illustrate the topologies being calculated.

dave
I dowloaded it and my excell don't want to open it!

I've got an error message, telling that the file is password protected with a protection not compatible with my windows regional setings

am I the only one?
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