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Multi-Way Conventional loudspeakers with crossovers

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Old 28th March 2007, 01:52 AM   #1
adason is offline adason  United States
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Default coaxial

hi gentlemen,

just want to point your attention to a nice speakers
I could not resist and purchased 12" coaxial sammi sound
http://www.partsexpress.com/pe/showd...number=299-766
after a week of playing on the floor without the box I put it in temporary enclosure
sound excelent, highly recommended!
/I will still work on crossover, horn tweeter is overpowering woofer, nothing attenuator can not cure/
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Old 28th March 2007, 01:56 AM   #2
adason is offline adason  United States
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I tested the speakers with both solid state and tube amps, works perfectly with both, highly efficient
bass is deep, midrange just fine, hights crystal clear but more efficient than should...
handles plenty of power
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Old 28th March 2007, 02:42 AM   #3
rdf is offline rdf  Canada
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Soooo tempting. I love the sound of coaxials, and that efficiency/price/performance ratio too. It took a bit to find but here's the frequency response:
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Old 28th March 2007, 03:34 AM   #4
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I couldn't resist either and have a pair sitting in boxes. I am interested in your XO.
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Old 28th March 2007, 03:46 AM   #5
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wow! interesting. I hadn't seen this before, now i need to find an excuse to build something around these...haha
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Old 28th March 2007, 09:42 AM   #6
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Hi all,

adason
where did you buy your speaker clamps? Can't we find the old style cast clamps from JBL style. Much better but where to buy?

good work rdf but where is the rest? freq. curves for LF Unit and HF Unit, xover freq. ...
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Old 28th March 2007, 12:43 PM   #7
adason is offline adason  United States
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hi rdf
thanks for the frequency response
if I will have some time, I will measure fr response in my room for each unit individualy

looking at the fr response , it confirms my impressions, it is tilting upwards, it could use variable attenuator to make it more flat
I currently do not have any, but I will purchase one soon
than I will experiment with setting on attenuator, once happy, I will measure the attenuator and install resistors

listening to the speakers, bass is nice and deep, it sounds fine without the subwoofer
however, coaxials could be used as midranges/tweeters on top of big efficient subwoofer, that should yield better sound and higher power handling

maybe even open baffle for coaxial on top of subwoofer

possibilities are limitless

cal, I will certainly put inductor on woofer, currently its running straight, only one 3.3 uF cap for tweeter
I put 6 uF at first but that was way too much hights
crossover is somewhere between 3 to 5 kHz
far from final, but most importantly speakers are already sounding great

highly suitable for small power amps

Inductor, I do not understand what you mean by clamps
speakers are mounted temporarily from the front on the baffle by screws
speakers on the back have gold plated high quality push and insert wire connectors, separate for each tweeter and woofer

Inductor, the fr response is complete, for both units together
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Old 28th March 2007, 01:01 PM   #8
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This is a speaker clamp.
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Old 28th March 2007, 01:54 PM   #9
adason is offline adason  United States
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oh, I see, now I perfectly understand
you were looking at my other speakers, the monstrous cervin vega
I got those 18" cervins with clamps

the coaxial does not need it
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Old 28th March 2007, 02:53 PM   #10
rdf is offline rdf  Canada
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Sorry, that's all I found. From a Korean site:

http://www.soundhouse.co.kr/html/sou...r=11502&page=1
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