problem with crossover

laki101 · 16th November 2010, 12:14 PM

i bought a set of really great sounding, second-hand speakers it was made by a company called Tesla from the Czech Republic

now they are 3 way and have 2 3 position switches on them one for high and one for mid tones so that you can tune them to have a bit lower,higher or normal high and mid tones

now the problem that i discovered now is that on one of them the bass sometimes goes away so stops working and when you switch the switches a few time it works again and after a few minutes it stops again etc.

I think it is some mechanical problem that it losses contact on the crossover or is it something more serious?

Cal Weldon · 16th November 2010, 02:52 PM

Sounds like something wrong with the switch.

Inductor · 17th November 2010, 01:37 AM

Bass (woofer) should not be connected to switch (2 switches). Just Mid and Tweeter.

laki101 · 17th November 2010, 06:55 AM

it is not connected to the switch but when you move the switch it works again so maybe when you move the switch you maybe shake the crossover which results in making a contact again

plusback · 19th November 2010, 06:15 AM

try spraying some contact cleaner into the switches.

firstwatt · 20th November 2010, 09:19 AM

I have mounted 2 x 6.25" into 2 mdf enclosure towers and I don't have tweeters picked out. These were the freebee Peerless from 2 Burning Amp ago shows, at 6.25". So a vented port, with 1 tweeter and 1 midwoofer per side. Any recommendation on tweeters/crossovers for these would be appreciated. Thanks Ron

firstwatt · 21st November 2010, 01:54 AM

I went with a pair of HiVi dome tweeters and a pair of Dayton x-overs at 3.5KHz. I started with a 1" vent/port hole near the bottom of the front plate. Any pointers would be appreciated.

firstwatt · 21st November 2010, 03:41 AM

Quote:

Originally Posted by firstwatt

I went with a pair of HiVi dome tweeters and a pair of Dayton x-overs at 3.5KHz. I started with a 1" vent/port hole near the bottom of the front plate. Any pointers would be appreciated.

A little confusing, because the x-over is rated at 4-8 ohms and the HiVi says it's a 6 ohm impedance.

PeteMcK · 21st November 2010, 09:57 PM

Impedance varys with frequency - so 'off the shelf crossovers' won't give good results, crossover part need to be calculated for the drivers they're being used with.

Passive Crossover Network Design

You've hijacked someone else's thread, Mods - please split

Inductor · 21st November 2010, 11:15 PM

Ron (firstwatt),
You should measure your drivers, or connect to the website with the T/S parameters.

16th November 2010, 12:14 PM	#1
laki101 diyAudio Member Join Date: Dec 2009	problem with crossover i bought a set of really great sounding, second-hand speakers it was made by a company called Tesla from the Czech Republic now they are 3 way and have 2 3 position switches on them one for high and one for mid tones so that you can tune them to have a bit lower,higher or normal high and mid tones now the problem that i discovered now is that on one of them the bass sometimes goes away so stops working and when you switch the switches a few time it works again and after a few minutes it stops again etc. I think it is some mechanical problem that it losses contact on the crossover or is it something more serious?

16th November 2010, 02:52 PM	#2
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Sounds like something wrong with the switch. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

17th November 2010, 01:37 AM	#3
Inductor diyAudio Member Join Date: Feb 2006 Location: Cascais	Bass (woofer) should not be connected to switch (2 switches). Just Mid and Tweeter. __________________ What the Hell is this crap?! It's not crap, it's muzak.

20th November 2010, 09:19 AM	#6
firstwatt diyAudio Member Join Date: Nov 2010 Location: No. California	I'm interested in building/purchasing a 2 way xover. This would be a first 2 way. I have mounted 2 x 6.25" into 2 mdf enclosure towers and I don't have tweeters picked out. These were the freebee Peerless from 2 Burning Amp ago shows, at 6.25". So a vented port, with 1 tweeter and 1 midwoofer per side. Any recommendation on tweeters/crossovers for these would be appreciated. Thanks Ron

21st November 2010, 09:57 PM	#9
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Sydney	Impedance varys with frequency - so 'off the shelf crossovers' won't give good results, crossover part need to be calculated for the drivers they're being used with. Passive Crossover Network Design You've hijacked someone else's thread, Mods - please split __________________ ‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky


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17th November 2010, 06:55 AM	#4
laki101 diyAudio Member Join Date: Dec 2009	it is not connected to the switch but when you move the switch it works again so maybe when you move the switch you maybe shake the crossover which results in making a contact again

19th November 2010, 06:15 AM	#5
plusback diyAudio Member Join Date: Jul 2010	try spraying some contact cleaner into the switches.

21st November 2010, 01:54 AM	#7
firstwatt diyAudio Member Join Date: Nov 2010 Location: No. California	I went with a pair of HiVi dome tweeters and a pair of Dayton x-overs at 3.5KHz. I started with a 1" vent/port hole near the bottom of the front plate. Any pointers would be appreciated.

21st November 2010, 11:15 PM	#10
Inductor diyAudio Member Join Date: Feb 2006 Location: Cascais	Ron (firstwatt), You should measure your drivers, or connect to the website with the T/S parameters. __________________ What the Hell is this crap?! It's not crap, it's muzak.

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