Spot the deliberate mistake |
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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Posted: 18 April 2013 at 2:37pm |
2 x celestions in a Vox AC30.
First person to spot the mistake gets a picture of a slice of my dad's birthday cake |
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Kevin
North Staffordshire |
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mk2_ginger_biscuit69
Old Croc Joined: 03 November 2008 Location: Brighton Status: Offline Points: 7801 |
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looks like they are wired in series, but for some reason one seems to have been wired to the right driver chassis to 'earth' it, and judging by the size of the tabs, they are wired out of phase [+ / - / - / +]?
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''Remember that the object of a subwoofer is to enhance the output of your main speakers, not overpower it''
''Dubstep - an elongated electronic fart'' |
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all bass
Old Croc Joined: 11 October 2012 Location: the Netherlands Status: Offline Points: 1855 |
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Lovely wiring technique, how would you call it?
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Steve_B
Old Croc Joined: 29 September 2007 Status: Offline Points: 1587 |
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It should have been at least 2.4mm cable?
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Elliot Thompson
Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5172 |
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The Jumper cable is wired negative (-) to negative (-) instead of positive (+) to negative (-). Best Regrads, |
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Elliot Thompson
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Joe-Trojan
New Member Joined: 15 April 2013 Status: Offline Points: 4 |
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nice escher picture!
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Creative
Registered User Joined: 05 February 2009 Location: Southend, Essex Status: Offline Points: 139 |
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they are wired in series and are 16ohms giving 32ohms. The AC30 is a valve amp and would not have a 32ohm tap on the output transformer.
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Time flies like an arrow - fruit flies like a banana!
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GEB
Old Croc Joined: 13 November 2009 Location: East Midlands Status: Offline Points: 1993 |
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Should be wired like this in parallel?
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11154 |
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Yup,i have seen this sort of thing a few times,especially in 2x12's,are the drivers wired out of phase with each other? and they wonder why the cabinet doesnt sound quite right?
Edited by jbl_man - 18 April 2013 at 5:28pm |
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Be seeing you.
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funkyparrot
Young Croc Joined: 12 December 2010 Location: Leicestershire Status: Offline Points: 860 |
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Are they really out of phase? The solder tags are facing one another, therefore top becomes bottom.....Impedance will be too high, and why is one lead grounded to chassis?
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Creative
Registered User Joined: 05 February 2009 Location: Southend, Essex Status: Offline Points: 139 |
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No they are not out of phase but they are wired in series when it should be parallel. Once upon a time it was considered good practice to earth speaker chassis as a safety precaution. However earthing only one is a bit pointless. The only other thing is that the speakers are G12M. If this is an original vintage amp it would have been fitted with Celestion Blue speakers. They are still available. However they cost an arm and a leg and usually get replaced with something cheaper.
Edit. Having had another look at the photo I think both speakers are earthed. Edited by Creative - 18 April 2013 at 5:26pm |
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Time flies like an arrow - fruit flies like a banana!
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TONY.A.S.S.
Old Croc Joined: 21 February 2007 Location: United Kingdom Status: Offline Points: 6878 |
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Anyone getting the cake yet?
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