Which 20 uF capacitor for biamp protection |
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serioussound
Registered User Joined: 01 December 2013 Status: Offline Points: 443 |
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Posted: 20 July 2019 at 9:49pm |
Please can someone give me a suggestion which capasitor 20 uF to buy for protecting my drivers when configuring biamp. I need a 20 uF cpacitor. Im putting in an order here so if anyone please can help me out which capacitor to buy it would be much appreciated. |
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Conanski
Old Croc Joined: 26 January 2006 Location: Ottawa, Canada Status: Offline Points: 2515 |
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I thought you weren't going to install one? You need a non polarized high voltage cap as it will be exposed to the full voltage swing of the amplifier. You won't find a 20uf you have to use the closest standard value(22uf) or a pair of 10uF caps in parallel. Something like this will do... https://www.parts-express.com/jantzen-audio-22uf-400v-crosscap-capacitor--027-940 Edited by Conanski - 20 July 2019 at 11:08pm |
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serioussound
Registered User Joined: 01 December 2013 Status: Offline Points: 443 |
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I changed my mind its a cheap insurance right?
Can you find one at mouser.com that suites? Im gonna order my switches there thats why I want to buy the capacitors there to ..
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ceharden
The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776 |
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Don't bother with the capacitor and just get into the habit of turning the HF amp on first, checking that it's coming out of the right drivers before turning any other amps up!
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Meat
Old Croc Joined: 05 June 2009 Location: Manc Status: Offline Points: 1514 |
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Having HF on pins +2/-2 helps protect against the well meaning helper that wires the subs into the comps too.
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Don't test the champignon sound
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Conanski
Old Croc Joined: 26 January 2006 Location: Ottawa, Canada Status: Offline Points: 2515 |
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I don't have a cap in my bi-amp cabs, they are wired with the comps on the +-2 pins and the rack is prewired with patch panel so there is no way to connect the speakers incorrectly unless somebody has been in the rack messing around, but I'm the only one that ever touches the gear. The cap would be a really good idea if these boxes were going to be general rental pieces with all sorts of uneducated users, but it's a personal system right so once it's setup correctly you should be safe.
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madboffin
Old Croc Joined: 03 July 2009 Location: Milton Keynes Status: Offline Points: 1537 |
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It will protect the driver from a humming amplifier in the event of a bad input connection...
I don't think Mouser have anything suitable. It's really a specialist audio item, rather than general electronics.. Best to use a 250V or 400V rated Polypropylene film type. 20 or 22 uF will do. It should be an axial lead type if you aren't fitting to a printed circuit board. SCR (or Solen) is a brand commonly used by pro-audio manufacturers. Edited by madboffin - 21 July 2019 at 8:57pm |
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markie
Old Croc Joined: 31 October 2005 Location: Sunny Liskeard. Status: Offline Points: 4570 |
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I have some 23.3uF caps (Turbosound) £10.00 a pair plus postage.
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If it's got wheels or tits it's gonna cost a fortune
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