Proac Tablette 2000 crossover?

slav · 27th November 2010, 09:25 AM

Hi
Some time ago I bought mentioned speakers , now I'm trying to change some components in crossover .I have searched the web and cannot find anything about inductor values , wonder if somebody has a crossover schematic or measured those inductors?
Another option would be to buy inductance meter , but I am not sure how accurate cheap L-meters are.
Here is schematic without inductance values.
post-998-100006029%201198528837.gif
Thanks

slav · 5th December 2010, 08:34 AM

Hi
I got myself into trouble , haven't checked polarity of tweeter before and now I'm not sure if was inverted or not . How to find out?
Best Regards
Slav

Pit Hinder · 5th December 2010, 09:42 AM

Slav,
not inverted. And you got really lucky finding a pair - these little beauties really sing.

Pit

slav · 5th December 2010, 09:47 AM

Quote:

Originally Posted by Pit Hinder

Slav,
not inverted. And you got really lucky finding a pair - these little beauties really sing.

Pit

Thanks Pit
How do you know ?
Best Regards
Slav

Inductor · 5th December 2010, 09:50 AM

Quote:

Originally Posted by slav

Hi
I got myself into trouble , haven't checked polarity of tweeter before and now I'm not sure if was inverted or not . How to find out?
Best Regards
Slav

Look here.

Quote:

crossovers: the standard proac crossover is 2nd order in the bass, 3 order in the tweeter, with one attenuation resistor as the first component in the tweeter. No L-pads here.

They are in phase...
a little proac info. - ZeroGain Forum

Inductor · 5th December 2010, 09:54 AM

Quote:

Originally Posted by slav

Hi
Another option would be to buy inductance meter , but I am not sure how accurate cheap L-meters are.

I have a RANGE RE6000, and it works very fine.

Pit Hinder · 5th December 2010, 09:59 AM

Slav, I was around when the first version of the Tablette came out (late 70s, early 80s)...the original drivers are no longer available, but the newer ones are as good as the old ones. The Scandinavians build quality.

slav · 5th December 2010, 10:10 AM

Quote:

Originally Posted by Pit Hinder

Slav, I was around when the first version of the Tablette came out (late 70s, early 80s)...the original drivers are no longer available, but the newer ones are as good as the old ones. The Scandinavians build quality.

I meant how do you know if tweeter is inverting or not ?
When polarization should be reversed and when shoulnd't , what is a deciding factor?

Pit Hinder · 5th December 2010, 10:18 AM

>what is a deciding factor? <

The drivers themselves, the crossover...when you have a mismatch they are at 180° phase shift at the crossover frequency and cancel each other out. Voices sound "thin", guitars have no "body"...not good.

slav · 5th December 2010, 12:06 PM

Sorry but I'm still not getting .
Correct me if I'm wrong , depend on number of caps and inductors used in signal path of the speaker signal is shifted out of phase ie. 2 caps in signal path of woofer shift signal 180 degrees out of phase , lets assume there is no L or C in signal path of the tweeter - do I need to invert phase , but which speaker (woofer)?
Example 2:
2 caps in woofer , 1 in tweeter - 90 degreedifference - what then?

27th November 2010, 09:25 AM	#1
slav diyAudio Member Join Date: Mar 2010	Proac Tablette 2000 crossover? Hi Some time ago I bought mentioned speakers , now I'm trying to change some components in crossover .I have searched the web and cannot find anything about inductor values , wonder if somebody has a crossover schematic or measured those inductors? Another option would be to buy inductance meter , but I am not sure how accurate cheap L-meters are. Here is schematic without inductance values. post-998-100006029%201198528837.gif Thanks

5th December 2010, 08:34 AM	#2
slav diyAudio Member Join Date: Mar 2010	Please help with Tweeter polarity Hi I got myself into trouble , haven't checked polarity of tweeter before and now I'm not sure if was inverted or not . How to find out? Best Regards Slav

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5th December 2010, 09:42 AM	#3
Pit Hinder diyAudio Member Join Date: Nov 2006 Location: Hannover, Germany	Slav, not inverted. And you got really lucky finding a pair - these little beauties really sing. Pit

5th December 2010, 09:59 AM	#7
Pit Hinder diyAudio Member Join Date: Nov 2006 Location: Hannover, Germany	Slav, I was around when the first version of the Tablette came out (late 70s, early 80s)...the original drivers are no longer available, but the newer ones are as good as the old ones. The Scandinavians build quality.

5th December 2010, 10:18 AM	#9
Pit Hinder diyAudio Member Join Date: Nov 2006 Location: Hannover, Germany	>what is a deciding factor? < The drivers themselves, the crossover...when you have a mismatch they are at 180° phase shift at the crossover frequency and cancel each other out. Voices sound "thin", guitars have no "body"...not good.

5th December 2010, 12:06 PM	#10
slav diyAudio Member Join Date: Mar 2010	Sorry but I'm still not getting . Correct me if I'm wrong , depend on number of caps and inductors used in signal path of the speaker signal is shifted out of phase ie. 2 caps in signal path of woofer shift signal 180 degrees out of phase , lets assume there is no L or C in signal path of the tweeter - do I need to invert phase , but which speaker (woofer)? Example 2: 2 caps in woofer , 1 in tweeter - 90 degreedifference - what then?

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