hi there, can you calculate me please what is the F3 bass repsonse startin from...
MC 247 | Magnat HiFi MuseuM
All Ribbon 6PII | Magnat HiFi MuseuM
box is about 1,2 cu ft volume, with about 1/4 stuffin.....
Thanx to you all
MC 247 | Magnat HiFi MuseuM
All Ribbon 6PII | Magnat HiFi MuseuM
box is about 1,2 cu ft volume, with about 1/4 stuffin.....
Thanx to you all
Put the numbers in here to find out, or if it is sealed there is a calculator for that.
HiFi Loudspeaker Design
HiFi Loudspeaker Design
All the numbers you need to sim the box are there.
1.2 ft3 = 34 litres which looks to be way to small (Q~1.09 with no damping). An optimum size box is closer to 100 litre.
F3 has been shown to be meaningless for humans (ref Toole), the small box has a serious hump before it rolls off and right where a typical room will make it worse. F10 about 33 hz, F6 in the low 40s. The bigger box has F10 about 10 Hz lower, F6 in the low 30s.
You can push the small box towards the larger one by making it aperiodic. We can talk about that if you are interested
This woofer has a low Qms, which means it could be a candidate for use with a current amp.
dave
1.2 ft3 = 34 litres which looks to be way to small (Q~1.09 with no damping). An optimum size box is closer to 100 litre.
F3 has been shown to be meaningless for humans (ref Toole), the small box has a serious hump before it rolls off and right where a typical room will make it worse. F10 about 33 hz, F6 in the low 40s. The bigger box has F10 about 10 Hz lower, F6 in the low 30s.
You can push the small box towards the larger one by making it aperiodic. We can talk about that if you are interested
This woofer has a low Qms, which means it could be a candidate for use with a current amp.
dave
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Floyd Toole in his research showed that F3 is meaningless to the human ear/brain. It is an artifact of the filter theory used in T/S/modeling approach. It is only a useful number if you are using the poles as part of a filter with something below it.
dave
dave
planet10: thanks to be helpfull....
Thats what i thought f6 over 40, not bad...but if i compare them with bassdrivers in my ex infinitys reference 60s, they were much better in lower basses (but the worst tweeters ;( )
Thinking to get another pair of same magnats and do towers of them and let them rise to depth from 28 to cca 35cm (another 10liters per woofer), would that be notable increase??
Or forget about it, and try to built some with less volume demanding...??
Thats what i thought f6 over 40, not bad...but if i compare them with bassdrivers in my ex infinitys reference 60s, they were much better in lower basses (but the worst tweeters ;( )
Thinking to get another pair of same magnats and do towers of them and let them rise to depth from 28 to cca 35cm (another 10liters per woofer), would that be notable increase??
Or forget about it, and try to built some with less volume demanding...??
had to look this up:
An Aperiodic Speaker Enclosure is essentially a poorly sealed box (i.e. leaky). The aperiodic enclosure vents the inside of the box to the outside air through a damped ported (a port stuffed with damping material), which is sometimes referred to as an "acoustic resistor" or "resistive port/vent". These Aperiodic ports or vents are sold primarily by Dynaudio, (called "Variovents") and by Scan-Speak (called a "flow resistance vent").
Thx, good to know how these are called; I know them as "old sock in the port subs. " And the practical use is making the sub less boomy; better roll off, of the lower end.
The Dyna VarioVent are devices they sold to emulate the kind of fiberglass damped vent used in the A25. It works, but is not an optimum solution.
An aperiodic can also be thot of as a vented box (or a TL) which has heavily damped vents.
dave
An aperiodic can also be thot of as a vented box (or a TL) which has heavily damped vents.
dave
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