Speakerplans.com Homepage
Forum Home Forum Home > General > General Forum
  New Posts New Posts RSS Feed - Which 20 uF capacitor for biamp protection
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Which 20 uF capacitor for biamp protection

 Post Reply Post Reply
Author
Message
serioussound View Drop Down
Registered User
Registered User


Joined: 01 December 2013
Status: Offline
Points: 443
Post Options Post Options   Thanks (0) Thanks(0)   Quote serioussound Quote  Post ReplyReply Direct Link To This Post Topic: Which 20 uF capacitor for biamp protection
    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.

Back to Top
Conanski View Drop Down
Old Croc
Old Croc
Avatar

Joined: 26 January 2006
Location: Ottawa, Canada
Status: Offline
Points: 2515
Post Options Post Options   Thanks (0) Thanks(0)   Quote Conanski Quote  Post ReplyReply Direct Link To This Post Posted: 20 July 2019 at 11:05pm
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
Back to Top
serioussound View Drop Down
Registered User
Registered User


Joined: 01 December 2013
Status: Offline
Points: 443
Post Options Post Options   Thanks (0) Thanks(0)   Quote serioussound Quote  Post ReplyReply Direct Link To This Post Posted: 20 July 2019 at 11:12pm
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 ..
Back to Top
ceharden View Drop Down
The 10,000 Points Club
The 10,000 Points Club
Avatar

Joined: 05 June 2005
Location: Southampton
Status: Offline
Points: 11776
Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2019 at 1:00am
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!

Back to Top
Meat View Drop Down
Old Croc
Old Croc


Joined: 05 June 2009
Location: Manc
Status: Offline
Points: 1514
Post Options Post Options   Thanks (0) Thanks(0)   Quote Meat Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2019 at 1:49pm
Having HF on pins +2/-2 helps protect against the well meaning helper that wires the subs into the comps too.
Don't test the champignon sound
Back to Top
Conanski View Drop Down
Old Croc
Old Croc
Avatar

Joined: 26 January 2006
Location: Ottawa, Canada
Status: Offline
Points: 2515
Post Options Post Options   Thanks (0) Thanks(0)   Quote Conanski Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2019 at 2:20pm
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.
Back to Top
madboffin View Drop Down
Old Croc
Old Croc


Joined: 03 July 2009
Location: Milton Keynes
Status: Offline
Points: 1537
Post Options Post Options   Thanks (0) Thanks(0)   Quote madboffin Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2019 at 8:56pm
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
Back to Top
markie View Drop Down
Old Croc
Old Croc


Joined: 31 October 2005
Location: Sunny Liskeard.
Status: Offline
Points: 4570
Post Options Post Options   Thanks (0) Thanks(0)   Quote markie Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2019 at 10:49pm
I have some 23.3uF caps (Turbosound) £10.00 a pair plus postage.
If it's got wheels or tits it's gonna cost a fortune
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2023 Web Wiz Ltd.

This page was generated in 0.094 seconds.