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Multi-Way Conventional loudspeakers with crossovers

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Old 3rd December 2010, 11:15 PM   #421
49 - for the 18th time
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Great work gainphile!!!

Thanks for taking the time to post the information about the web site with info regarding the x-over's etc.

Sooooooo many desirable projects - soooooo little money.
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Old 3rd December 2010, 11:39 PM   #422
Jonasz is offline Jonasz  Sweden
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Awesome gainphile!

Just paint them pink and they look just like Barbapapa...

Click the image to open in full size.

I'm glad to hear that you're satisfied with the bassresponse. I'm thinking about using my AE IB15 in a baffle about 50cm wide, do you think this will work?
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Old 3rd December 2010, 11:55 PM   #423
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Gainphile, how do you feel about the Lil Buddy? Do you have a circuit on it or let it play full out on that OB?

Very cool.

Zilla
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Old 4th December 2010, 07:52 AM   #424
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Those speakers are not mine!!

I simply found the description on the web and post it here and provide the links.

Nevertheless they seems to be very well designed and documented
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Old 4th December 2010, 02:53 PM   #425
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Gainphile, it would be best to put the text on post no.420 in quotation marks.

Love your work by the way. I have put together a PLLXO, 4-way active system myself, based on ideas from yourself, the NaoNote, and StigEriks set-up, to name a few. I have no measuring equipment yet, other than my ears and a test tone CD, but would like to try the omnipole function on the Blue yeti mic, then I can record instruments with it also, a cost effective solution. I wonder if it would suffice?
Product Review - Blue Microphone Yeti USB Microphone Review
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Old 4th December 2010, 03:23 PM   #426
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Here is something that is finally working very well for me after a couple of years of experimentation (playing around). I just try to copy other peoples sims and measurements to get ball park baffle widths and xover points.


Structure
The baffle width is a compromise but worth the theoretical advantages and improved WAF. From the picture you can see the 4" driver is behind the tweeter. I am planning on trimming some metal of the aluminum supports so that the cones can sit between the supports, lining up the acoustical centers, and hopefully resolving supposed diffraction issues.

Drivers
Neo3PDR, open baffled.
Monacor MS-100CHQ - 4ohm - 90db
http://www.monacor.de/typo3/index.ph...8&spr=EN&typ=u
Monacor SP-8/150PRO - 8ohm - 93db
http://www.monacor-ost.com/catalogue...=62&SubKtg=679
Eminence Alpha15s - 8ohm - paralleled to give 4ohm

Xover
The PLLXO changes regularly since I am guessing a lot to be honest. I crossed the 15's 67Hz/12db, supposedly reducing some of the open baffle hump this narrow baffle would give the woofers. Sounds right after a lot of experimenting. On 31octave test tones, the sound is pretty close to flat now, with a BSc circuit (10k-10k-100nf) on the upper two or three drivers.

Amp6b - 15" LP - 67Hz@12db
Amp6b - 8" BP - 125-350@6db
TA10.1 - 4"+Neo3PDR in parallel (just above 4ohm with the Xover hopefully) HP - 700hz@6db.
Speaker level cap on Neo3PDR - 8khz@6db
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Old 4th December 2010, 08:38 PM   #427
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Oops, last image has my previous B200 with phase plug in there.

I cannot see how to edit ones posts in this forum. Is it not allowed?
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Old 4th December 2010, 09:11 PM   #428
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I think the cutoff is 30 minutes after posting, but I could be wrong...

They certainly look like they mean business, and it's good to see someone else enjoying the amp6-b. Also, the links to the drivers don't appear to be working.
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Old 4th December 2010, 09:43 PM   #429
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fakamada,

I think 250 Hz and 2 kHz is pretty optimal. It is what you hear that counts not what you could press units to. X-max-wise, distortionwise and so on.
But soundwise I think that the Alpha15s are the weakest link in this setup. You can occasionally hear, I think at least, notes that could be more stringently reproduced.

keyser,

I could not get consistent results replaying CD records with no baffle. Most sounded thin in high bass, low midrange compared to the sound with this small 8" baffle. Also without baffle I needed 15 dB shelving EQ for the 6ND430 and 300 Hz crossover frequency. Now with the 20 cm baffle there is no need for EQ at all. No doubt for this combo baffle is better than no baffle soundwise.

But also no doubt you win both clarity and definition by separating bass baffle from the midrange and tweeter. This is easily heard.

/Erling

Last edited by skorpion; 4th December 2010 at 10:09 PM.
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Old 4th December 2010, 10:52 PM   #430
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Quote:
Originally Posted by chris661 View Post
I think the cutoff is 30 minutes after posting, but I could be wrong...

They certainly look like they mean business, and it's good to see someone else enjoying the amp6-b. Also, the links to the drivers don't appear to be working.
I am awaiting delivery of a couple of amp9s to replace the amp6s (and a TA10.1). Eight instead of six channels, and more power at lower distortion, should improve them.

Here are some links I just double checked;

4" (As used by Skorpion in his MJAO G 098, which prompted me to try it);
MONACOR INTERNATIONAL:New products

8" (I've never seen anyone use this, just a suggestion somewhere for dipole use);
MONACOR INTERNATIONAL:New products
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