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Multi-Way Conventional loudspeakers with crossovers

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Old 20th October 2012, 10:49 AM   #241
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by demeterart View Post
agreed, provided there is no need to match source/load as in tubes that use transformers and rely on impedance reflection to transfer max. power, although the significance would not be tat important given the outrageous speaker behaviour - impedanc wise.
with tube amps, the problem is more the sudden impedance 'bumps/peaks' caused by the crossover itself
some are worse than others
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Old 20th October 2012, 10:50 AM   #242
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Simple, don't use valve amps.
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Old 20th October 2012, 10:51 AM   #243
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yes, some crossover types do behave like drunkards ;-)
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Old 20th October 2012, 10:52 AM   #244
tinitus is offline tinitus  Europe
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could well be, but they look so good

Quote:
Originally Posted by pinkmouse View Post
Simple, don't use valve amps.
Quote:
Originally Posted by demeterart View Post
yes, some crossover types do behave like drunkards ;-)
I wonder why noone places the active xo right at input of power amps
you shouldn't need to ad more than the passive components, caps and resistors
(and no Dave, Im not talking about PLLXO )
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Old 20th October 2012, 11:02 AM   #245
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Quote:
Originally Posted by tinitus View Post
I wonder why noone places the active xo right at input of power amps
you shouldn't need to ad more than the passive components, caps and resistors
Lars,

If it just uses passives it is a PLLXO. I use them quite often. If you are dedicting the amps to the speakers you can often just change existing values (ie for a HP, shrink the size of a coupling cap.

dave
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Old 20th October 2012, 11:02 AM   #246
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i guess you are referring to integrated units with probably hybrid circuitry?
i suppose it presents no feat other than carefully designed supplies and real estate
provisions/layout.
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Old 20th October 2012, 11:06 AM   #247
tinitus is offline tinitus  Europe
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Originally Posted by planet10 View Post
Lars,

If it just uses passives it is a PLLXO.
nope, it uses the input of the power amp as the active part, just like in active

I guess it only needs adding the feedback loop to work like any ordinary active xo
well at least 12db should be possible and simple

I have been shown it works with a chip amp, so why not other amps ?
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Old 20th October 2012, 11:39 AM   #248
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Originally Posted by Wavebourn View Post
Do you reproduce DC? I don't. I assume SY does not. So what is that DC resistance about?
Isn't an inductors impedance made up of the DC resistance plus the reactance?
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Old 20th October 2012, 11:43 AM   #249
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Originally Posted by tinitus View Post
could well be, but they look so good





I wonder why noone places the active xo right at input of power amps
you shouldn't need to ad more than the passive components, caps and resistors
(and no Dave, Im not talking about PLLXO )
I've never seen a good looking valve amp.
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Old 20th October 2012, 11:43 AM   #250
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You need to get out more.
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