Enclosure suggestions for Audison driver

wmd916

Member
2014-12-15 2:59 am
I have a pair of Audison Voce 6.5 drivers that I would like to build enclosures for. I've tried for 5 hours to load several different sim programs on my laptop to no avail including changing compatibility mode. I'm the type of guy who prefers to do things on my own before asking for help(used to have access to CLIO and some pro advice) so I turned to online calculators with mixed results. I would appreciate any help. I'm not asking for a full sim on this but if one felt so kind to do so I wouldn't be disappointed. Basic suggestions or pointing me in the right direction would be just fine.

These drivers sound amazing door mounted in a car. Very smooth and detailed but they fall flat on their face above 4k. I will be using a pair of Vifa xt25's I have to fill in the upper octaves. I posted in full range as the style enclosure I'm looking for I would think would be most common here. MiniDSP will be incorporated as well.

Here's the driver:

Audison Voce - AV 6.5

Basic specs:
Fs: 68hz
Sensitivity: 91
QTS: .71 or .74 using mh audio calc
Vas: 8.2L

What I'm hoping for:

1. Extension down to 50hz would be nice. Maybe f3 mid 40's?

2. Prefer a floorstander but I could make or purchase stands.

3. Something that isn't completely dependent on corner or wall loading. I was interested in a BIB until I read that they need corner or wall loading. Someone who has experienced them please feel free to confirm or deny that. I do have room to wall load them but it would require the enclosures be spaced 4 feet apart max and near field listening isn't my forte.

4. I don't listen at rock concert levels. Super high db isn't required and this is solely for music. No HT use. No Rap either. Dave Mathews, Norah Jones, O.A.R, Pink Floyd and the like are favored. Maybe 95db max.

5. Lastly NO WAF. My wife rocks.

These are nice drivers and I would hate to have to toss them out as I'm no longer into car audio. I feel the high qts would, to my laymen mind, seem suited for a sealed alignment or OB and certainly not BR but I would like the bass extension that sealed wouldn't produce. Any suggestions would be very much appreciated.

Cheers,

Wes
 
Last edited:
Hmm, the basics is that at a ~0.403 Qts, Vb = Vas, Fb = Fs; so as Qts rises, Vb increases WRT Vas, Fb decreases WRT Fs, ergo power handling increasingly rapidly drops. Consequently, getting any useful output much below Fs requires either wall or corner and/or horn loading, especially when it's such a small driver.

All things considered then for high Qt drivers is to use some form of TL loading to get whatever bass available out of them and to keep it simple, many folks have been very pleased with simple pipe horns [aka BIB], with a default one octave lower tuning, though need at least wall loading.

They can be inverted to floor loading [aka BIBi] though usually best if limited to only a half octave below Fs [adjust Fs to change the calculation], so one option:

http://www.diyaudio.com/forums/full...ose-fostex-craft-handbooks.html?highlight=BIB

https://speakerprojects.wordpress.com/cabinet-types/bib-loudspeakers/bib-calculator/

Another, smaller option is to use MJK's Classic TL Alignment Tables to design a TL, but don't recommend a tuning < Fs, though due to the stuffing it will go a bit lower, like a large IB will and maybe enough for some room gain to boost it a bit.

Quarter Wavelength Loudspeaker Design

http://www.quarter-wave.com/TLs/Alignment_Tables.pdf

http://www.quarter-wave.com/TLs/Alignment_Tables_Calculator_3_3_09.xls

GM
 

wmd916

Member
2014-12-15 2:59 am
Greg(GM),

Thank you so very much. Your input here and elsewhere in the DIY audio community is under appreciated your say the least. Thank you for your advice. I've looked at each one of the links you've provided before but I have minimal background to come to an educated conclusion. I will look closer at the BIB. Much thanks.

Wes
 

wmd916

Member
2014-12-15 2:59 am
Greg(GM),

Thank you so very much. Your input here and elsewhere in the DIY audio community is under appreciated your say the least. Thank you for your advice. I've looked at each one of the links you've provided before but I have minimal background to come to an educated conclusion. I will look closer at the BIB. Much thanks.

Wes

GM,

I've been dealing with serious illness lately and didn't catch my typing errors. Your input is appreciated by many but I don't believe some realize how valuable it might be. Thanks again.
 
That's OK, since for whatever reason I didn't get an email update for it............

Regardless, I understood your intent, so thanks for the 'attaboy' ;) and hope you're now informed enough to 'come to an educated conclusion', though if not, then maybe at least you have enough to ask much more specific Qs till you get there.

Anyway, hope you're on the mend and looking forward to how these turn out since this brand is new to me. Looks good for a TL and may help damp some/all of the rubber surround's typical hysteresis 'ringing', though likely you'll have to cover it with a star pattern or similar damping ring.

GM