Working on the clone set today -
http://www.diyaudio.com/forums/construction-tips/243645-gone-60-seconds.html#post3668095
post 7
http://www.diyaudio.com/forums/construction-tips/243645-gone-60-seconds.html#post3668095
post 7
The Clones are Kool!
There was a minor issue with the 1st first set, they sounded like they were straining now and then. Of course I was horrified that the tweeters may be crossed too low...again
Didn't want to bring this up because never liked the "Blue Caps" (top left), couldn't wait for the PE order with a pair of Solen caps (which are very reasonably priced, btw).
The Clones with the Solen's are great/wonderful. Maybe the "noise" is somewhere else, maybe one of the tweeter coils is misaligned.
Really enjoying the double 5 woofers, they have a bigger than appearance sound. Might try again some day with some carbon fiber drivers I found on MS (not cheap).
There was a minor issue with the 1st first set, they sounded like they were straining now and then. Of course I was horrified that the tweeters may be crossed too low...again
Didn't want to bring this up because never liked the "Blue Caps" (top left), couldn't wait for the PE order with a pair of Solen caps (which are very reasonably priced, btw).
The Clones with the Solen's are great/wonderful. Maybe the "noise" is somewhere else, maybe one of the tweeter coils is misaligned.
Really enjoying the double 5 woofers, they have a bigger than appearance sound. Might try again some day with some carbon fiber drivers I found on MS (not cheap).
Attachments
That's quite possible. I was hoping the 4th order filter would allow some level at 2 kHz, but this may turn out to be wrong. Due to the increased tweeter resistor, there is the option to reduce the tweeter capacitor as well. Attached the result with 4.7 uF which doesn't look bad either. Let me know if you find out the cause of the issue with the first set.
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Yes, think we headed in the right direction, a slight improvement.
Might have lost a bit of "air" but less straining, will increase tweeter level a bit.
Had the 4.7uF - also a pair of 5.1uF on hand.
Might have lost a bit of "air" but less straining, will increase tweeter level a bit.
Had the 4.7uF - also a pair of 5.1uF on hand.
Added a10ohm to the 3.9 = 3.1ohm, so far this is the best combination!
AND no worries about overlap or over-driving the tweeter with a 4.7uF.
AND no worries about overlap or over-driving the tweeter with a 4.7uF.
We now have a crossover at 3.1 kHz and the level at 2 kHz is more than 12 dB down. If this doesn't work impeccably, there must be something wrong with the drivers. For comparison: Zaph uses a 2nd order filter at 2.5 kHz in his ZD5.
I found another implementation of the Vifa XT25 for comparison. Same coil, but larger capacitors here:
Vifa PL14WJ-
Vifa PL14WJ-
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Now's there's a large cap on the tweeter; a MS design uses a 9.uF in a 4" mtm (Vifa XT25).
Strange that cap is 2.5 x larger in the d'Appolito design 8.2uF vs. 3.3uF in the 2-way.
There is a replacement woofer for the Troels Grovsen designs - I'll have to look for old email with details.
Edit - sorry no, it was a different project:http://www.troelsgravesen.dk/Peerless_HDS830875.htm
Strange that cap is 2.5 x larger in the d'Appolito design 8.2uF vs. 3.3uF in the 2-way.
There is a replacement woofer for the Troels Grovsen designs - I'll have to look for old email with details.
Edit - sorry no, it was a different project:http://www.troelsgravesen.dk/Peerless_HDS830875.htm
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Need one more of these, # 5
Getting faster, but still several hours of work, which is fine AND its going to warm up later for painting 🙂
I want to keep xo costs down; diy 18g solder spool coil e.g.
Q. If I use the 4.7cap, I'm guessing I can replace the 15uF with a 10uf?
Also, since we are experimenting with these, can the xo be brought down a bit?
I could just replace the 4.7cap; willy-nilly with slightly larger ones but worried about phase.
Getting faster, but still several hours of work, which is fine AND its going to warm up later for painting 🙂
I want to keep xo costs down; diy 18g solder spool coil e.g.
Q. If I use the 4.7cap, I'm guessing I can replace the 15uF with a 10uf?
Also, since we are experimenting with these, can the xo be brought down a bit?
I could just replace the 4.7cap; willy-nilly with slightly larger ones but worried about phase.
Attachments
A minimum crossover saves two coils.
Note: 10 uF instead of 15 uF is a bad idea here and the frequency response is as good as it gets...
Note: 10 uF instead of 15 uF is a bad idea here and the frequency response is as good as it gets...
Attachments
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Could be trouble....they may work better!
Hard to say really, but these are a bit brighter......
I like them
Made up pair - 16uf tweeter caps, btw.
Nope we didn't save much
Hard to say really, but these are a bit brighter......
I like them
Made up pair - 16uf tweeter caps, btw.
Nope we didn't save much
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You never know. Anything from "much worse" to "even better" is possible. I'm only guessing, you decide.
The box in pic above is the set that had the tweeter break-up. This is gone now, so that's an eye opener 
Maybe some of the x25's work better than others, which was the case with MDT 28-30's; some had "the noise" others were crystal clear.
This xo version is well balanced, maybe gave up some bass, but hard to say - still plenty. The middle is shinning through; very pleasant and sound wayyyyy better than ever expected.
Maybe some of the x25's work better than others, which was the case with MDT 28-30's; some had "the noise" others were crystal clear.
This xo version is well balanced, maybe gave up some bass, but hard to say - still plenty. The middle is shinning through; very pleasant and sound wayyyyy better than ever expected.
Little rumble boxes
These are a blast! And learned a few things along the way.
e.g. the jumbo woofer coils didn't do much, the smaller ones worked fine.
Dissi, make sure you are sitting down - Raised the tweeter level this time; 3.3ohm. Really like what you did with the tweeters, very natural
The black one on the floor won't be here long, that's going to friends for a swap
These are a blast! And learned a few things along the way.
e.g. the jumbo woofer coils didn't do much, the smaller ones worked fine.
Dissi, make sure you are sitting down - Raised the tweeter level this time; 3.3ohm. Really like what you did with the tweeters, very natural
The black one on the floor won't be here long, that's going to friends for a swap
Attachments
Peerless 832591
Hi ODougbo,
I have just tried to PM regarding the two projects you completed using the Peerless 832591. I have four brand new one sitting in my garage along with two Peerless 811827 that I was going to use in an MTM configuration. I've also read through your other posts where you used the 832591 with the XT25 in a smaller bookshelf design.
I would like to contact you if that's ok just regarding some questions I had.
Cheers
Caz
Hi ODougbo,
I have just tried to PM regarding the two projects you completed using the Peerless 832591. I have four brand new one sitting in my garage along with two Peerless 811827 that I was going to use in an MTM configuration. I've also read through your other posts where you used the 832591 with the XT25 in a smaller bookshelf design.
I would like to contact you if that's ok just regarding some questions I had.
Cheers
Caz
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