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Multi-Way Conventional loudspeakers with crossovers

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Old 1st October 2011, 09:30 PM   #2021
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Originally Posted by scitizen17 View Post
Here is a set I am currently working on. 48" tall, 10" woofer, horn tweeter. 96~97dB sensitivity 1 watt @ 1 meter. The center between the two drivers is based on the average height of typical listening seating. Note the triangle port at the bottom of the cabinet. It is in one side only. Opposite sides of course for a mirrored pair.
Here are the finished loudspeakers. Finished with Dayton vinyl laminate. Worked out pretty good. Listening to them now, loud, to loosen up the woofers. They sound great to me. Very "live". Hopefully soon I can plot a response curve. That will have to wait until I get back from vacation in 3 weeks.
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Old 8th October 2011, 09:06 PM   #2022
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Click the image to open in full size.

SS Air Circ, SEAS W12, W26.
Looks great But is there a particular reason you made the midrange box so big?
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Old 9th October 2011, 01:33 PM   #2023
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SS transmission line sub. Complete build thread here
23W4557T002 transmission line sub - Techtalk Speaker Building, Audio, Video, and Electronics Customer Discussion Forum From Parts-Express.com
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Old 9th October 2011, 04:04 PM   #2024
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Default Hold the phone...maybe time for a reality check.

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I just don't understand why 'audiophiles', i.e. folks educated in the art that ought to know better than to simply buy into (i.e. accept the philosophy) what the profit oriented corporations try to spoon feed the masses, would, when they want quality bass reproduction, go to all the trouble of building a really nice box and put a driver in it which is far too small to move enough air to make bass without extreme levels of excusrion and acompanying distortion.

Corporate quest for profits, WAF and all that lean towards tiny speakers. The laws of physics and the quest for excellence lean towards big speakers.

R-Carpenter. That is a very nice looking small bass speaker cabinet. I'm not picking on you specifically. This is a general rant but it was your project that inspired my getting off my duff and speaking my mind on this issue.

I hope you will tell us more about that line array which looks interesting. The fact that you have built a speaker for midrange duties that requires far less SPL to be of equal volume to the bass notes using far more cone area than you did for the woofer, supportive of my treatise about your questionable choice of driver for the low notes.

If you plan to match a subwoofer to those line arrays in the same system you are going to need much larger subwoofer(s).
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Old 9th October 2011, 05:27 PM   #2025
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Default The "Intimates"

A high end 2-way with SS drivers and a Sonus Faber Extrema 2nd order type acoustic xover. Cabs are 15L PE and closely resemble Polk's. Measured bass extension (vent included) is down below 30 hz. with a vented alignment. Off-axis response is also excellent.

The design objective was a no compromise pair of stand mounted mini-monitors to play in a relatively small listening room. Music most suited for these is high quality recordings of relatively small acoustic groups, singer/songwriters, string quartets, etc.. They are not rock speakers for sure!

PM me for design details...
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Old 9th October 2011, 05:45 PM   #2026
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Quote:
Originally Posted by rcavictim View Post
I just don't understand why 'audiophiles', i.e. folks educated in the art that ought to know better than to simply buy into (i.e. accept the philosophy) what the profit oriented corporations try to spoon feed the masses, would, when they want quality bass reproduction, go to all the trouble of building a really nice box and put a driver in it which is far too small to move enough air to make bass without extreme levels of excusrion and acompanying distortion.

Corporate quest for profits, WAF and all that lean towards tiny speakers. The laws of physics and the quest for excellence lean towards big speakers.

R-Carpenter. That is a very nice looking small bass speaker cabinet. I'm not picking on you specifically. This is a general rant but it was your project that inspired my getting off my duff and speaking my mind on this issue.

I hope you will tell us more about that line array which looks interesting. The fact that you have built a speaker for midrange duties that requires far less SPL to be of equal volume to the bass notes using far more cone area than you did for the woofer, supportive of my treatise about your questionable choice of driver for the low notes.

If you plan to match a subwoofer to those line arrays in the same system you are going to need much larger subwoofer(s).
That is definitely a rant.
This sub is build for my own home theater set up. I live an an apartment and the living room is 14x22ft. So, I guess that answers the question of my questionable choice of drivers for a 2x3x1ft weighting close to 200 pounds small cabinet with f3 round about 33hz.
The line arrays will be shown on NY DIY which I am hosting, accompanied by a pair of transmission line loaded, 10" sub woofer peerless drivers, 4 per side having a flat terminus output 80hz to 18hz.
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Old 9th October 2011, 06:09 PM   #2027
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Very nice looking sub R-Carpenter! I'm sure it has plenty of output for your living space.
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Old 9th October 2011, 10:23 PM   #2028
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Click the image to open in full size.

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Old 9th October 2011, 11:24 PM   #2029
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Norman,

Great picture, how about the details?
Are those speakers capable of rendering realistic dynamics?

Best Regards,
TerryO
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Old 10th October 2011, 06:56 AM   #2030
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sure, ev dh7 compression on an ev hr90 horn, 24db/octave LR active crossover @ 750hz (with a bunch of high end eq), woofers are eminence 15lf magnum run in a jbl 4508a box (8ft3 with 1 port stuffed, making 30hz tuning). Amp is a bypassed front end of a Nakamichi sr-3a.

Yea, my 2 way 8" sounded strained listening to tlc, so out come the big rig. Things sound effortless, especially at low volumes. I like bass (80hz) that an 8" just can't do. The klipsch has better highs (above 2khz), but at what expense ? To be fair, 2 x 15's (shorting rings) has 8 times the area and a bit more xmax. I like bass that hits (impact seems to be 80-200hz), flat measuring 8" crossed at 80-100hz just doesn't pound you like dual 15's. And dual 15's get bass further into the room (better lever).

I'm closely looking at the 18sound xt1464 horn, but it looks like it wants a 1.2khz crossover point (a bit high for a 15" for me). I'm not sure about a compression driver, but the neo 18sound is around $329 each. And the horns seem to only be drilled for their driver (figures). I like my 40 x 90 dispersion, but I may trade for less echos.

It is a fun system to play with, it's addictive, and very fun. It is not a sleeper, but it sounds way better than you'd expect it to (thinking it is a junky dj speaker). The ev is an excellent horn designed by Don Keele (constant directivity). I'm sure making it a 3-way would be ideal, but I don't want that much complication nor that many crossover phase angle problems. But a 750hz crossover point is way better to my ears than 2khz. Most horns (excluding oris, etc) really should be run over a decade only, distortion and reflection goes nuts past that.

Norman

Last edited by norman bates; 10th October 2011 at 07:08 AM.
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