Sonus Faber 6.5" woofers and cheap 3" fullrange and misc. - diyAudio
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Old 23rd December 2007, 06:02 PM   #2
KBK is offline KBK  Canada
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Does the Sonus Faber woofer have a 'stressed', ie, non-centered position of the spyder? It looks like it does. Is this a result of a sagging suspension or is the normal position of the spyder and cone?
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Old 23rd December 2007, 11:29 PM   #3
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Quote:
Originally posted by KBK
Does the Sonus Faber woofer have a 'stressed', ie, non-centered position of the spyder? It looks like it does. Is this a result of a sagging suspension or is the normal position of the spyder and cone?


I think I know what you mean. If the cone faces up or towards the sky, it looks like the spider is lower or closer to the ground in the center than at its radius, correct?



They are both like this, so I would guess itís normal. Is that not a functionally optimum position?



I donít know how much to ask for these woofers and it seems as if no one wants to make an offer, so how much should I ask for?

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Old 24th December 2007, 08:42 PM   #4
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Default 6.5" woofers

Any idea what the specs are? Hard for anyone to use without them............. how much you asking?

Mark


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Old 24th December 2007, 10:38 PM   #5
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Default Re: 6.5" woofers

Quote:
Originally posted by kramster
Any idea what the specs are? Hard for anyone to use without them............. how much you asking?
Measuring the electrical, mechanical properties and frequency response of a driver is easy, in my opinion. And obtaining VAS is not too hard either. Calibrating my sound card was the hardest or most time consuming part of processes.

$50 shipped sound good or no? I think I might try UPS for the shipping, see how it goes. The post office got under my skin last time I mailed a package. Yarrr
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Old 24th December 2007, 11:11 PM   #6
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Default OK

sure $50 shipped is okay, by whatever means............ send me a Paypal invoice........... I'll pm the e-mail.
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Old 24th December 2007, 11:14 PM   #7
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Default Tonight

PS we are going out for family activities, but if you send an invoice, I'll pay later tonight..............
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Old 25th December 2007, 05:08 AM   #8
limono is offline limono  United States
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Take an enclosure too . Have it cut in cabinetmaker shop in a half , put some base & front baffle and you have a pair of monitors with right volume for the woofers you just bought .Just a thought .Regards
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Old 25th December 2007, 04:25 PM   #9
KBK is offline KBK  Canada
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The stressed spyder creates a point where in the 'neutral' position of the cone, there is less free play. This creates a more 'perfect' sounding midrange. This can also make bass sound more 'taught' or 'tight', or 'articulate' with ported boxes.

Though the specs and any measurements may indicate that such a driver is OK for sealed boxes, the dynamics in the bass are restricted and the whole exercise is thus useless, even though the midrange is just incredible. However, they are optimum for ported boxes, where the 'motional mass' considerations of the ported system dominate the equation of the motional dynamics. In a sealed box, the opposite is more true, and you need a softer suspension with more self excitation or resonance in the driver's overall behaviour. In the process of getting to a lower FS in a sealed box with the softer suspension, for obtaining a far more articulate bass than a ported box...you loose the incredible midrange, as you cannot use this kind of driver. Such is life. Always a compromise.

These woofers you have will make for a VERY musical speaker, that must be ported. Or, conversely, the drivers need to be used in a three-way with a sealed cavity for the mid-bass section.

I have four of the 5" size brand new C-Quenze drivers from Audio Technology (which Sonus Faber sometimes uses).

I had left them in the boxes for two years and wondered if they were broken! I guess they are not, so I can sell them now, with no worries that I'm ripping off the buyer.

Same for the 7" C-Quenze units I have. I can now sell them with no fears I'm ripping off the buyer, by selling them some bad drivers.

The woofers you have seem like they are customized Vifa units. The label and basket are identical to Vifa units, IIRC.

The perfect specification for these woofers is the Sonus Faber box air volume they came out of. This includes the port size and position as well.
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Old 26th December 2007, 03:13 AM   #10
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Quote:
Originally posted by KBK
These woofers you have will make for a VERY musical speaker, that must be ported. Or, conversely, the drivers need to be used in a three-way with a sealed cavity for the mid-bass section.
I don't follow how you can use them in a 3-way, with a sealed chamber. Thought your whole point was that they shouldn't be used in a sealed chamber.

Quote:
Originally posted by KBK
The perfect specification for these woofers is the Sonus Faber box air volume they came out of. This includes the port size and position as well.
I was just going to copy the cross-over and use them in a 2-way ported box half the volume of 2.5-way they came in with a Vifa tweeter, if I didn't measure the specs.
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