I have use the B200 in an OB for over a month now, but for my tiny room and taste, I am thinking about putting the B200 in a aperiodic box to improve the bass over the OB and perhap a sharper imaging as well.
Now I know there is the Omega version but I am looking for a thin tall box if possible. Also, is there any formula to calculate the vent size?
If I use a long box and put the vent at the bottom, will this turn into a TL?
TIA.
Chuck T
Now I know there is the Omega version but I am looking for a thin tall box if possible. Also, is there any formula to calculate the vent size?
If I use a long box and put the vent at the bottom, will this turn into a TL?
TIA.
Chuck T
I don't think there have ever been any formulas for aperiodic loading -at least, not that are of any use to us now. Closest are Scan Speak's remarks about their aperiodic vents -aperiodic will behave as a critically damped sealed box of 20% greater volume than is acutally the case. How accurate that is, I've no idea. Probably roughly correct.
No, if you make a tall cabinet with the vent at the bottom, it won't be a TL, or not exactly, but you might have some QW issues unless you make sure the enclosure is suffiencntly damped, & perhaps have a coupel of internal panels to break up standing waves. You should be able to simply double the height of the Omega cabinet though without any problems. As a general rule, for sealed boxes & their variations, bigger = better LF performance.
No, if you make a tall cabinet with the vent at the bottom, it won't be a TL, or not exactly, but you might have some QW issues unless you make sure the enclosure is suffiencntly damped, & perhaps have a coupel of internal panels to break up standing waves. You should be able to simply double the height of the Omega cabinet though without any problems. As a general rule, for sealed boxes & their variations, bigger = better LF performance.
Hi.
Omega Loudspeakers is preparing a floorstanding version of the discontinued A8...
http://www.omegaloudspeakers.com/news.htm
There is an especialized forum in Audio Circle about Omega loudspeakers with very friendly people. Moderator is Louis Chochos (president of Omega). Sure they can help...
http://www.audiocircle.com/circles/index.php?board=31.0
Some information about aperiodic loading on this thread...
http://www.diyaudio.com/forums/showthread.php?s=&threadid=87012
Best regards.
Antonio.
Omega Loudspeakers is preparing a floorstanding version of the discontinued A8...
http://www.omegaloudspeakers.com/news.htm
There is an especialized forum in Audio Circle about Omega loudspeakers with very friendly people. Moderator is Louis Chochos (president of Omega). Sure they can help...
http://www.audiocircle.com/circles/index.php?board=31.0
Some information about aperiodic loading on this thread...
http://www.diyaudio.com/forums/showthread.php?s=&threadid=87012
Best regards.
Antonio.
The thinner and longer it is, the more likely you are to get box resonances.
AFAIK the Omega enclosure uses a pair of Scan-speak vents you can get at madisound. 6 bucks each, not too bad. Or you could fabricate the vent(s) yourself.
IIRC one way to think of an aperiodic is as a sealed box, but with the vents increasing the effective volume. So model the box as a normal sealed box, with the actual size as a lower bound to the effective size. I've never seen any calcs as to how much volume the vents add to the effective size.
AFAIK the Omega enclosure uses a pair of Scan-speak vents you can get at madisound. 6 bucks each, not too bad. Or you could fabricate the vent(s) yourself.
IIRC one way to think of an aperiodic is as a sealed box, but with the vents increasing the effective volume. So model the box as a normal sealed box, with the actual size as a lower bound to the effective size. I've never seen any calcs as to how much volume the vents add to the effective size.
You can model aperiodic in Martin King's MathCad worksheets. Used the Ported box or ML TQWT sheet, and add stuffing to the port.
I only found out myself a few months back. Best to do an initial design in the Sealed Box sheet as a control response, then re-model in the ported box sheet using the above method.
visaton solo100
Hi
you may also want to look at the original Visaton designs for the B200, the Solo 50, or Solo 100 -details are here....
and there's a Solo 75 in the visaton forum, it's about as long as the 100 but thinner - Solo 75
The Solos are double chamber bass reflex designs with a damped inner port.
best, LC
Hi
you may also want to look at the original Visaton designs for the B200, the Solo 50, or Solo 100 -details are here....
and there's a Solo 75 in the visaton forum, it's about as long as the 100 but thinner - Solo 75
The Solos are double chamber bass reflex designs with a damped inner port.
best, LC
Thanks for the reponse.
I have already read a few of those threads.
I notice the Omega like to use wide and shallow boxes, I wonder if there is advantages for wide baffle as I would like use narrow box if possible. The vent looks big and is located directly behind the driver.
I'll probably use a large square vent as well.
I have the old Martin King worksheets. For the ported box, which is the port stuffing density? Is it the Dp0 ~ Dp4 ? why is there 4 of those variables?
I have already read a few of those threads.
I notice the Omega like to use wide and shallow boxes, I wonder if there is advantages for wide baffle as I would like use narrow box if possible. The vent looks big and is located directly behind the driver.
I'll probably use a large square vent as well.
I have the old Martin King worksheets. For the ported box, which is the port stuffing density? Is it the Dp0 ~ Dp4 ? why is there 4 of those variables?
Wide baffles can give an interesting wave-launch and lowers the frequency at which baffle-step loss occurs.
Re the sheets, scroll down further until you see the heading 'Port Section of the Enclosure' The right hand of the 4 columbs lists stuffing density. Normally it's set to 0.0. Adjust as per requirements, but don't go beyond 0.999lbs ft^3 or MathCad will thpow a fit.
Re the sheets, scroll down further until you see the heading 'Port Section of the Enclosure' The right hand of the 4 columbs lists stuffing density. Normally it's set to 0.0. Adjust as per requirements, but don't go beyond 0.999lbs ft^3 or MathCad will thpow a fit.
Thanks.
I tried out the port stuffing and size,
The sims I got tends toword tiny port and heavy stuffing of the port.
The port location is also very important too.
I tried out the port stuffing and size,
The sims I got tends toword tiny port and heavy stuffing of the port.
The port location is also very important too.
Right. That's the way to do it. Aperiodic port CSA is (usually) extremely small, and heavily damped.
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