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sn95 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sn95 Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2018 at 10:11pm
If you check every in a BR box it calls for a BIG box to get it flat.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote tkroeker Quote  Post ReplyReply Direct Link To This Post Posted: 10 February 2018 at 7:12am
?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 11 February 2018 at 12:23pm
Originally posted by tkroeker tkroeker wrote:

So what effect does having a high QES and QTS have.
These are 
QES - .62
QTS - .57




Those values tell you, you have bought a cheap car bass speaker, for PA use.
"Gentlemen, you can't fight in here, this is the war room!!".
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mobiele eenheid Quote  Post ReplyReply Direct Link To This Post Posted: 11 February 2018 at 12:47pm
Quote So what effect does having a high QES and QTS have.
These are 
QES - .62
QTS - .57
It does tell you the manufacturer had to cut down on the cost of the driver, and now the driver isn't as usable (for a wide variety of designs) as it would have been with a lower Qts. On the plus side it will handle a decent amount of power (they didn't cut back there).

Quote Long and short of it, quite a weak motor. Small magnet, low magnetic flux in the gap, not many wire turns in the gap, small voicecoil

Actually, just based on Qes and Qts, the magnet could still be huge, due to a large Xmax *(many turns) or a different motor topology. The voice coil could still be large as well, a 6" VC driver can still have a high Qes and the current 3.9" VC isn't actually that small.

Johan



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Post Options Post Options   Thanks (0) Thanks(0)   Quote odc04r Quote  Post ReplyReply Direct Link To This Post Posted: 11 February 2018 at 6:33pm
Originally posted by mobiele eenheid mobiele eenheid wrote:

Quote So what effect does having a high QES and QTS have.
These are 
QES - .62
QTS - .57
It does tell you the manufacturer had to cut down on the cost of the driver, and now the driver isn't as usable (for a wide variety of designs) as it would have been with a lower Qts. On the plus side it will handle a decent amount of power (they didn't cut back there).

Quote Long and short of it, quite a weak motor. Small magnet, low magnetic flux in the gap, not many wire turns in the gap, small voicecoil

Actually, just based on Qes and Qts, the magnet could still be huge, due to a large Xmax *(many turns) or a different motor topology. The voice coil could still be large as well, a 6" VC driver can still have a high Qes and the current 3.9" VC isn't actually that small.

Johan



It was more intended to be a list of a few possible things than them all being true, but yes I agree.  Low electrical damping generally means weak motor though, however that happens.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tkroeker Quote  Post ReplyReply Direct Link To This Post Posted: 14 February 2018 at 6:52pm
Good comments. 

I guess the best adds would be until I drop in different drivers, do certain things like...

stay away from XX frequency or.. keep the volume low... stuff like that.
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