Maplins close-out on AP100Z0

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#242
F1's back in stock at maplin..............

I have just had a look at the maplin website during lunch to look at alternatives....and........and.........they are back in stock Yippee.

Just thought some of you may like to know 😉
m
 
#244
well you did ask...

Many moons ago I read a glowing review of the Mission X-Space system praising its midrange speed and clarity and saying how it defeated even Mission 752s in this. Foolishly without hearing them I bought a set at close-out for £200 and spent ages messing around trying to get them to sound decent. Eventually I destroyed one of the NXT panels trying to mod it so have since been left with the 3-channel amp. The stereo rolls off at 12db at about 200 Hz and there is a mono mid-bass underneath that (I have removed the internal mid-bass speaker and now feed that out. Also I have a pair of Linaeum tweeters taken from a pair of LX5. I hope the AZ100 will work with the Lins as satellites (their low sensitivity make them a better match than many others) and build a mono woofer (not really sub) fed by the 3rd channel to fill in below for a bedroom system - so it's using stuff up really.

Ian
 
#245
I've just posted on another forum the modeled difference between the pre and post run-in of a AP100Z0 in a 10l enclosure tuned to 53Hz. I've also included the manufacturer specs model. There's barely a 2.25 db difference between models, although I haven't considered excursion, delay etc.
 

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#246
Vikash,

Having read peoples response to the 34mm and looking at the FR graphs i elected to go the F1 route.

I have noticed that this (the F1) has been used as the tweeter of choice in the Audax designs on it's website by some respected designers.

As far as the woofers go i was looking at having two AP's per cabinet in MTM configuration. A popular way to cross these driversapppears to be to cross them at different frequencies, a 2.5 way configuration?

m
 
#248
Vikash said:
Simon, make sure you explicity specify "no lamp holders" when ordering yours 😀

So what ideas do you all have with your drivers? Are you doing 2-ways, 3-ways??

And which tweeter are you all feeling now that the 34mm is cheaper and the f1 is available?
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I guess I will have to specify no lamp holders 😀

I might like to try a '2.5'-way, as some call it ie. 2-way with a BSC driver. And then I've still got half my drivers for another project 🙂 I would like to have one driver loaded by a sealed box and the other in a ported chamber, just to see if that works well. These will surely make great office pc speakers 😉

I will buy a pair of those big 34mm tweeters, because they sound nice. So far people have talked about their rough response, but their intrinsic character is actually pretty pleasant to my ears. Recently I wired one up (a sort of spare one I have lying around) and played it with a 1st order x-over and it didn't get unpleasant and harsh even at very high levels, it just stayed clean and sweet. I doubt there is a readily available, better tweeter for £15. 😎

edit: Thanks once again Vikash for your measurements and plots, it's very valuable information, and much appreciated.
 
#250
5th element said:
SimontY said:
it just stayed clean and sweet. I
the larger cone area of this driver will mean its excursion will be reduced at lower frequencies. This means its less likely to exceed xmax and stay clean and smooth sounding.

rough radiating area for the F1
4.9cm2

rough radiating area for the 34mm
9cm2

almost twice the amount = much less excursion.
Click to expand...
Interesting stuff. I'd like to say that it was less harsh with a given x-over at all levels though, and regardless of where you put your head. But that doesn't mean your logic isn't absolutely spot-on.
Click to expand...
Click to expand...
 
#251
Vikash said:
So what ideas do you all have with your drivers? Are you doing 2-ways, 3-ways??

And which tweeter are you all feeling now that the 34mm is cheaper and the f1 is available?
Click to expand...

I'm sticking with 3 way with home lathed phase plugs in the mids. I'm kinda committed to that now as I've removed the dust caps from 2 of them. I'm still using TW025A0 tweeters as these are what I have now. The only thing im unsure of now is wether to build bookshelfs, or some cute lil floorstanders....

Cheers Vikash and others for your info on this driver! 😎

Thanks,
Steve
 
#253
Hi,
Here we go. They didn't come off as easily as I would have liked! Tried heat but maybe needed more than a hair drier could provide. Still, theyre off, and havent ripped off any more than the shiny finish on the cone. Any suggestions for how to tidy up this? I was thinking maybe nail varnish... don't know. I guess Ill just be glueing them down with epoxy or something similar.
Umm if someone can point me to some formulas and design behind phase plugs Id love to take a look!! Until then it's very much trial and error.
Unfortunately just one driver on bass, as I only have four. Luckily I'm not building them for ultimate bass response 🙂 but im hoping to be surprised...
Thanks,
Steve
 

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#254
Hi guys, sounds like much fun is being had!!! Ok, I've changed my tweeter to a Visaton SC5, it's pretty small and fits in well (IMO). I've also done the phase plug thing. I cut the dust cap away with a scalpel, leaving the bonded area in place. As with baggystevo82 purely trial and error with regards to shape. It is temporarily fixed with a screw. The flat face of the screw sticks to the magnet.
HTH
Cheers steve
 
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