ACI SV12 in small aperiodic or sealed box? - diyAudio
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Old 6th May 2008, 10:04 PM   #1
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Cool ACI SV12 in small aperiodic or sealed box?

Has anyone tried the older ACI SV12 subwoofer in a small (2 cubic foot) enclosure?

http://subwoofers.cc/HomeAud/HDrivers/SV12b.asp

I wanted to know if aperiodic had any advantages over sealed. I can't model aperiodic in WinISD. Any input would be appreciated. I have the wood already cut but for the woofer and amp holes. Wondering if i should purchase an aperiodic vent from PE. Any thoughts or experiences. Also, if anyone has put this driver into a 3cf or larger box please let me know how it turned out for you.

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Old 6th May 2008, 11:04 PM   #2
stee-b is offline stee-b  United Kingdom
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Hello Godzilla!

I've used this driver for about 5-6 years. It was my first subwoofer in the home. Initially it was built into a ~100 litre box sealed and fully stuffed.

Now I had nothing to compare it to except ICE style subs I'd built, but I was impressed. Went deep and plenty loud enough, but seemed to blend reasonably well with my speakers of the time

I kept it like this for a year or two, but when SWMBO wanted to change things about in the living room it was ordered from the room. I managed to squeeze it in to a ~60 liter box again fully stuffed.

It was alright but I felt it needed a bit more power (for the same levels) and more (internal) room wouldn't have hurt it. I toyed with aperiodic loading and also the 3rd order system, but I managed to convince the other half to let the 100l box back in the room. Much better IMO.

It was retired last year as I couldn't find another to try isobarik in a smaller box and the poor little so 'n so's been in the loft since.

I upgraded to some drivers from ebay. IIRC they were modified LAB12 drivers from a company in the UK called BK Electronics as used in their Monolith subwoofer.
The SV12 didn't compare too well in their company, being dwarfed in magnet size and in weight

If you can sort an aperiodic loaded box give it a try. You can easily cover the 'port' with another piece of MDF/ply etc.

If I'd never had have heard it in the larger box I think I'd have been happy with the smaller box. I think....

Good luck!

Steve
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Old 7th May 2008, 12:10 AM   #3
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>>> I managed to convince the other half to let the 100l box back in the room. Much better IMO.

Ooooohhh! That's good info. Thanks!

>>> If you can sort an aperiodic loaded box give it a try. You can easily cover the 'port' with another piece of MDF...

And that is great advice. Thanks again.

When i model it using WinISD i want to put it into at least a 3 or 4 cf vented box but cannot fit it into my room... maybe a 3cf vented. Anyone here build one or hear one?

Godzilla
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Old 7th May 2008, 12:10 AM   #4
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>>> I managed to convince the other half to let the 100l box back in the room. Much better IMO.

Ooooohhh! That's good info. Thanks!

>>> If you can sort an aperiodic loaded box give it a try. You can easily cover the 'port' with another piece of MDF...

And that is great advice. Thanks again.

When i model it using WinISD i want to put it into at least a 3 or 4 cf vented box but cannot fit it into my room... maybe a 3cf vented. Anyone here build one or hear one?

Godzilla
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Old 7th May 2008, 03:12 PM   #5
bjorno is offline bjorno  Sweden
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FYI, The ACI SV12 simulated in aperiodic 3-4 cu ft enclosures: 1(3)-3(3)

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1(3)
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File Type: gif aci sv12_aper1.gif (30.1 KB, 183 views)
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Old 7th May 2008, 03:13 PM   #6
bjorno is offline bjorno  Sweden
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2(3)
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Old 7th May 2008, 03:15 PM   #7
bjorno is offline bjorno  Sweden
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3(3)
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Old 7th May 2008, 10:39 PM   #8
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I've had that driver in the ACI 1.8 ft ^3 aperiodic box. System Q was a little high for my liking, by memory someting around 1.0.

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Old 7th May 2008, 11:48 PM   #9
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>>> System Q was a little high for my liking, by memory someting around 1.0.

So sonically, this meant it was a little ripe or full sounding? Please describe what it sounded like.

Thanks,
Godzilla
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Old 8th May 2008, 06:07 AM   #10
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Thanks for the sims bjorno! Looks pretty flat. Maybe aperiodic is a good idea. Could i ask you to sim a 2cf box too using aperiodic? I would like to compare it to the same 2cf box sealed. This way i can determine if i need to cut another hole before building. Many thanks!

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