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Multi-Way Conventional loudspeakers with crossovers

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Old 22nd April 2009, 02:45 AM   #91
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I just wanted to mention that this thread was one of the things that inspired me to go ahead with building my (new) Fonken167 floorstanders with bass support in the bottom section.
Fonken 167 thread
Thanks for all the info here on passive crossovers, etc- I'll report back once I get my biamp setup in a decent case, and playing upstairs with the new speakers.
Cheers
John
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Old 8th May 2009, 05:58 PM   #92
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Quote:
Originally posted by VictoriaGuy
I just wanted to mention that this thread was one of the things that inspired me to go ahead with building my (new) Fonken167 floorstanders with bass support in the bottom section.
Fonken 167 thread
Thanks for all the info here on passive crossovers, etc- I'll report back once I get my biamp setup in a decent case, and playing upstairs with the new speakers.
Cheers
John
I really like how they came out. You've got the 167s running full range with the Eastechs coming in at 300hz, correct? Mine are split at 120hz, I have a feeling that I'll be playing around with that figure a bit once I get mine up and running finally.

Thanks for posting, your results gave me the kick in the behind I needed to get started again. After getting the rest of the cuts done and everything cleaned up I was psyching myself out comtemplating the glue up.
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Old 8th May 2009, 06:17 PM   #93
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I'm finally at the point where the only thing I have left to glue is the top panels for the cabinets. I'd had some trouble getting over my fear of gluing the panels together, I guess I got intimidated thinking it wasn't going to go together well. My cuts actually came out better then I expected, probably the most square and uniform panels that I've done yet. I learned two things when I built the Fonkens, first was the importance of setting up the table saw correctly, the second was knowing when to call it a night. I found that when I quit as soon as I start convincing myself to try and get one more thing done for the evening past what I'd planned to do, I don't make as many stupid mistakes.

Now I've got to figure out how to wire the drivers. When I bought the drivers from Dave he provided me with their measured specs, including Re. Three of the four drivers measured 7.3 ohms, the other 6.9. The drivers have dual voice coils, and they are advertised as being 4 ohm nominal, so I'm assuming the measured numbers are gotten when the 2 coils are wired in series. My amplifier is rated for driving a nominal load of between 4 and 16 ohms in stereo. Should I/would I be ok to wire the two drivers in series, or would that be too low of an impedance to play nice with my amp?
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Old 8th May 2009, 07:07 PM   #94
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Yes, i wired them in series to measure them. Wire each driver in series, and then parallel the 2 drivers will give you a 4 ohm loudspeaker.

In the Monsoons they came out of they actually had 2 amplifiers, one driving each 4 ohm voice coil (a clever strategy to get more ommf out of the 12V single rail transformers).

dave
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Old 9th May 2009, 02:11 PM   #95
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Thanks Dave.

Shouldn't be too much longer.....
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Old 30th September 2009, 12:27 AM   #96
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10 days after that last post my wife gave birth to our son.

I'd gotten the speakers together to listen to but without any type of finish. Been lsitening to the set up here and there, but not critically 'til recently. Good extension and impact but I'm not thrilled with the imaging when the active XO is in the equation. Placement of instruments isn't real convincing.

Would upgrading the op amps in the XO to the LM4562 be worth a shot?
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Old 30th September 2009, 02:53 PM   #97
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Congrats on the reproduction! My offspring is about 7 mo. old now, and I'm beginning to eye up the various grills and covers that'd fit the 167...
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Old 30th September 2009, 04:02 PM   #98
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Quote:
Originally Posted by JVA View Post
Look up creative sound solution's web site. On their SDX-7 7 inch woofer it has various box designs for this woofer, both vented and acoustic suspension.

Hi JVA,

That's a nice looking driver. How do you feel about its performance? I would be interested in seeing some distortion measurements, I wonder if any are available on the net (just took a look quickly for the moment). Anyway, it's very nice looking - it would make a sharp looking high-end 2 way, though CSS suggests crossing 'low', and FR seems to back that up. Sensativity is a little on the low side, however, I wonder if power compression would be an issue at moderate SPL.
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