One way to get better SPL with the CSS driver would be to use two of these in parallel, I just went and had a second look at these drivers, nice, and the prices from Darcher are reasonable.
The trunated frame allows close spacing so either WWMMT or WWMTM would work, especially if you used a neo tweeter like the Vifa with its truncated plate, very small C2C distances involved.
http://darcheraudio.com.au/shop/index.php?main_page=product_info&cPath=30&products_id=94
The trunated frame allows close spacing so either WWMMT or WWMTM would work, especially if you used a neo tweeter like the Vifa with its truncated plate, very small C2C distances involved.
http://darcheraudio.com.au/shop/index.php?main_page=product_info&cPath=30&products_id=94
Hi,
Hope I’m not disturbing this thread if showing pictures of a possible garbage design.
But FYI, my son and I have started a simple Christmas 3-way freestyle OB project using inexpensive leftover drivers that summed total to about 45 US $ less the two nessesary12 dB LR crossovers and the pieces of wood, of course.
The crossovers will be passive at about 300Hz and 1700 Hz. See the simulation and pictures 1(6) to 6(6).
b
1(6)
Hope I’m not disturbing this thread if showing pictures of a possible garbage design.
But FYI, my son and I have started a simple Christmas 3-way freestyle OB project using inexpensive leftover drivers that summed total to about 45 US $ less the two nessesary12 dB LR crossovers and the pieces of wood, of course.
The crossovers will be passive at about 300Hz and 1700 Hz. See the simulation and pictures 1(6) to 6(6).
b
1(6)
Attachments
Welcome Bjorno
If that is your idea of rubbish I'll go and stick my head in a gas oven now!
Couple of questions if I may.
Are they car subs?
What did you use for the baffle??
Also what do they sound like???
Regards
Also Merry Christmas
Ted
If that is your idea of rubbish I'll go and stick my head in a gas oven now!
Couple of questions if I may.
Are they car subs?
What did you use for the baffle??
Also what do they sound like???
Regards
Also Merry Christmas
Ted
Moondog55 said:
Ted, thanks for all that. I was actually thinking of trying the CSS without a tweeter as I'm really averse to strong tweets and thought the FR might just be enough. Then if not, I was considering adding one of the Jaycar ribbons from about 5-6K.
Trouble with those Jaycar woofs is that my room is about 65 square metres. I have almost gone and bought them a few times, but didn't want to waste money as I have 5 grand's school fees to pay in Jan. I did prefer a high efficiency speaker as I might just try a valve amp sometime next year. Maybe. I know yours is different, with 4 each side, and full on amplification/eq. It'd be a nice experiment, though, if they sounded OK.
I did consider one CSS on its own per channel - wouldn't it be efficient enough for the Jaycars (albeit an overall low efficiency speaker)?
Bjorno, welcome. The more the merrier. Nice work!
Happy Christmas.
Stu
My kids have thankfully all grown and got jobs, so while may not have any money at least those expenses are out of the way. Lets not talk about orthdontists!!
How about just one for the experiment??
I'm happy to post that small full range to you, it matches quite well crossed at 180/220 so you would be up for 4 inductors and 2 capacitors and two sheets of "Chipboard" 450 X 900
If you like it pay me then.
Total experiment cost about $150-
have you noticed the similarities in this thread re drivers for bass??
http://www.diyaudio.com/forums/showthread.php?s=&threadid=134475
I know that the little neo tweeter is getting a little hard to find but it is better than the Jaycar Foster ribbon ( I have a few left if you are interested )
How about just one for the experiment??
I'm happy to post that small full range to you, it matches quite well crossed at 180/220 so you would be up for 4 inductors and 2 capacitors and two sheets of "Chipboard" 450 X 900
If you like it pay me then.
Total experiment cost about $150-
have you noticed the similarities in this thread re drivers for bass??
http://www.diyaudio.com/forums/showthread.php?s=&threadid=134475
I know that the little neo tweeter is getting a little hard to find but it is better than the Jaycar Foster ribbon ( I have a few left if you are interested )
Just remembered Soundlabs in Melbourne stock Visaton
http://www.soundlabsgroup.com.au/p/V-1199-G25ND/G+25+ND+-+8+Ohm
Small neo tweeter with very similar properties to the Vifa neo, and a slightly smaller faceplate
http://www.soundlabsgroup.com.au/p/V-1199-G25ND/G+25+ND+-+8+Ohm
Small neo tweeter with very similar properties to the Vifa neo, and a slightly smaller faceplate
Geez, thanks for the offer Ted, that's really generous. But no, I won't get you to go to that trouble.
Hmmm, this is getting more complicated, not less! Ha Ha!
I've got limited time to experiment at the moment. Just coming to terms with going back to work after brain surgery - the most expensive haircut I've ever had.
I need to make a decision and get on with it.
Hmmm, this is getting more complicated, not less! Ha Ha!
I've got limited time to experiment at the moment. Just coming to terms with going back to work after brain surgery - the most expensive haircut I've ever had.
I need to make a decision and get on with it.
I hope every thing is OK now??
I agree with you, sometimes its the procrastination that gets too you.
They are only loudspeakers after all, we are not working on nucear waaste of cleaning the oceans or stopping WW3 after all.
Interestingly though I just built a 450 X 900 baffle to test that combination.
I used standard values of components from Jaycar
5.6mH on the woofer 1st order then 9mH and 33uF on the full range and just like that extremely listenable, a little treble shy and with no side walls on the baffle the bass is a little thin around resonance No bass below 40Hz, but for about $30 worth of parts good enough.
Start looking at op-shops for old speakers to pull-apart and cannabilize, I do it all the time, wind up with a lot of junk tho!!
Hmm, interesting! You don't mess around. You must have a lot of parts in your 'junk box'. What was that; the two woofers in parallel?
Yep, I'm on the mend, slowly, thanks.
What guts me from 'talking' to you is only 12 months ago I threw out a pair of 10" Magnavox woofers (still in the massive BR boxes)from an old stereo my Dad had. Yeh, not the best, but I reckon they'd have done duty in my son's (9yo) room in a decent setup.
Good stuff.
Yep, I'm on the mend, slowly, thanks.
What guts me from 'talking' to you is only 12 months ago I threw out a pair of 10" Magnavox woofers (still in the massive BR boxes)from an old stereo my Dad had. Yeh, not the best, but I reckon they'd have done duty in my son's (9yo) room in a decent setup.
Good stuff.
One woofer on its own.
I have a stack of 25mm beadboard
( old self supporting advertising posters from my time at M#### )
So no big deal to cut a hole with a sharp knife, easy and cheap, I usually take advantge of bulk buy prices so a lot of standard values in the parts box. Plus all the salvage of course
Magnavox woofers or the full range with wizzer?? Not my cup of tea although I have played with and ruined a pair of the 8's.
I just needed to see/hear if what I was saying to you held up when built, I'm a tinkerer and fudger not an accomplished designer but I'm slowly learning.
I have a stack of 25mm beadboard
( old self supporting advertising posters from my time at M#### )
So no big deal to cut a hole with a sharp knife, easy and cheap, I usually take advantge of bulk buy prices so a lot of standard values in the parts box. Plus all the salvage of course
Magnavox woofers or the full range with wizzer?? Not my cup of tea although I have played with and ruined a pair of the 8's.
I just needed to see/hear if what I was saying to you held up when built, I'm a tinkerer and fudger not an accomplished designer but I'm slowly learning.
Hi Ted,
Sorry if I my respond is slow, but for the moment I use slow mobile Internet to upload my postings.
😱 Don’t do that , I’ve just burn one of my fingers while making coffee on a ‘GAS’ driven
cook stove.
Yes they are and purchased this late summer on sale, I knew they would work in an OB configuration.
Years ago I measured the T/S parameters, helping a friend solving trouble (SQ) in a car speaker setup where the GAS woofers sounded ‘midrange’, they where put in a 10 L box!
Swedish fur from 18 mm IKEA shelves named ‘IVAR’.
I’m still trimming the whole OB system. So far, my impression is the combination of the M and T drivers sounds promisingly good, and FR wise smooth, so do the W drivers too but the rear bracings/ wings is not yet finished, so you have to wait until after Christmas for more a reliable SQ statement from this OB experiment.
By the way, I forgot to post the excursion simulation, see picture 1(1).
Happy Christmas
b
1(1)
Sorry if I my respond is slow, but for the moment I use slow mobile Internet to upload my postings.
😱 Don’t do that , I’ve just burn one of my fingers while making coffee on a ‘GAS’ driven
cook stove.Yes they are and purchased this late summer on sale, I knew they would work in an OB configuration.
Years ago I measured the T/S parameters, helping a friend solving trouble (SQ) in a car speaker setup where the GAS woofers sounded ‘midrange’, they where put in a 10 L box!
Swedish fur from 18 mm IKEA shelves named ‘IVAR’.
I’m still trimming the whole OB system. So far, my impression is the combination of the M and T drivers sounds promisingly good, and FR wise smooth, so do the W drivers too but the rear bracings/ wings is not yet finished, so you have to wait until after Christmas for more a reliable SQ statement from this OB experiment.
By the way, I forgot to post the excursion simulation, see picture 1(1).
Happy Christmas
b
1(1)
Attachments
Moondog55 said:
They were woofers accompanied by a 3" mid/tweet paper cone. Yeah, I know they're cheap & crappy, but my young son's becoming interested. Could have been for him I guess...
I've just spotted Audio Marketplace has Eminence Beta 15A's for $100, plus I think it's free shipping to major cities. I wonder if that includes suburbia? I've asked...
I'm now thinking a Beta in a fairly narrow U frame (for WAF) and flat OB up top for the FR (lower sensitivity for the woof, better bass extension) might match better with something like an FR125 sensitivity wise. I'd rather not throw away the dB's but still...
Stu
I'm now thinking a Beta in a fairly narrow U frame (for WAF) and flat OB up top for the FR (lower sensitivity for the woof, better bass extension) might match better with something like an FR125 sensitivity wise. I'd rather not throw away the dB's but still...
Stu
Having heard both the Jaycars sound better, but I think the Beta 15s will take more power, and 1 single 12inch Jaycar isn't the best so on balance probably the Beta 15 with EQ, price wise 4 Jaycar equal 1 Beta15,
Eminence needs a wider baffle but 4 * 12 inch take up a lot of room too.
Everything is a compromise
Eminence needs a wider baffle but 4 * 12 inch take up a lot of room too.
Everything is a compromise
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