jbl passive x-over, pics! |
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boycey
Old Croc Joined: 25 June 2006 Location: Manor House Status: Offline Points: 1612 |
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Posted: 05 March 2008 at 4:07pm |
i've pulled these out of some cabs i got on ebay, just had a search around and apparently they crossover at 800hz. the top can be attenuated to a maximum of -10dB. can't find anything on how much they're worth [i can't see them being massively useful to us at the mo, although that could change], or a detailed specsheet. audioheritage and jbl sites aren't being too useful, unless it's just me being a mong.
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the only thing more dangerous than a person who doesn't give a f**k is a person who gives a sh*t.
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colint
Old Croc Joined: 06 October 2007 Location: United Kingdom Status: Offline Points: 5227 |
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They look like the crossovers from one of the early cinema systems!
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Never criticise another man until you've walked a mile in his shoes. Once you have, call him what you like, you're a mile away and you've got his shoes!
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boycey
Old Croc Joined: 25 June 2006 Location: Manor House Status: Offline Points: 1612 |
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they are i think, got the cabs in my living room. no handles or corners and made from 1" mdf will post some pics up later.
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the only thing more dangerous than a person who doesn't give a f**k is a person who gives a sh*t.
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11155 |
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i think its a 3110 you have there..800hz passive x-over...dates from around 1970`s...low power use really,say under 100watts...ideal for home hi-fi,thats about it.
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Be seeing you.
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boycey
Old Croc Joined: 25 June 2006 Location: Manor House Status: Offline Points: 1612 |
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lol! the boxes had 8ohm 2226 woofers and 16ohm 2426 comp drivers in, according to the seller they took 750w each i might have to check to see if they're burnt inside, there's no sign from the outside.
Edited by boycey - 06 March 2008 at 5:09pm |
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the only thing more dangerous than a person who doesn't give a f**k is a person who gives a sh*t.
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11155 |
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The boxes were probually intended for cinema use,not for club/pa use....those old crossovers are quite strong,but the certainly wont survive 750watts...there may not be any visible damage inside,but it wont have done the 1970`s capacitors any good having that kind of power put into them.
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Be seeing you.
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boycey
Old Croc Joined: 25 June 2006 Location: Manor House Status: Offline Points: 1612 |
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if i wanted to test these would it be worth running an ac signal into it and hooking up an oscilloscope to the outputs to check the crossover point/whether any noise comes out? i don't really know what i'm doing but i'm keen to learn and have a physics lab at my disposal
or perhaps just hook it up to an audio signal and speakers and listen? |
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the only thing more dangerous than a person who doesn't give a f**k is a person who gives a sh*t.
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