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05-06-2010, 11:36 PM
| | Registered User | | Join Date: Dec 2006 Location: Phoenix, AZ | | | Can you wire a speaker backwards?
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I bought an old CTS era Fender 15" speaker. I hooked it up but I am worried that I might have done it backwards.
Judging from the pick. Which one is the black wire and which one is the white wire. Also...Is that Positive and negative?
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Last edited by selfblessed : 02-15-2011 at 12:25 AM.
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05-07-2010, 12:23 AM
| | Registered User | | Join Date: Sep 2008 Location: Sioux Falls, SD | | | Notice the connector that is GROUNDED? That is the MInus Lead, the other is the plus.
NOW. Depending on which way your amp is wired will depend on which is white and which is black... If this is hooked in a cab, with a jack on the back... The tip will need to be plus. The quick battery test will make sure the cone goes out... Simple.
BOB
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05-07-2010, 02:17 AM
| | Registered User | | Join Date: Feb 2005 Location: Johannesburg, South Africa | | | my understanding is that if it is the only speaker in your setup it is not an issue, but if there are others, it must be wired in phase with them ie. so that it moves in and out at the same time and not opposite to them |
05-07-2010, 04:15 AM
| | Registered User | | Join Date: Dec 2009 Location: NC | | | Expanding on Bob's battery test suggestion ...
To be certain, take a 9-volt battery and touch the speaker terminals, taking notice of which terminal the battery + is touching.
When the cone moves outward, then the terminal touching the battery + is the positive + terminal. If you have it backwards the cone will move inward toward the magnet, which is reverse polarity.
Works for most any common musical instrument speaker.
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Last edited by Tone Meister : 05-07-2010 at 04:19 AM.
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05-07-2010, 06:45 AM
|  | Player Characters fear me... Moderator | | Join Date: Nov 2002 Location: Middletown CT, USA | | Quote:
Originally Posted by Son of Bovril  my understanding is that if it is the only speaker in your setup it is not an issue, but if there are others, it must be wired in phase with them ie. so that it moves in and out at the same time and not opposite to them | true in theory. however you want it to be "standard" as a backwards install can cause problems if the amp is ever slaved out, used in conjuctnction with others - etc. Like forrest gump said - that's one less thing! |
05-07-2010, 07:13 AM
| | Registered User | | Join Date: Feb 2005 Location: Johannesburg, South Africa | | Quote:
Originally Posted by IvanMike true in theory. however you want it to be "standard" as a backwards install can cause problems if the amp is ever slaved out, used in conjuctnction with others - etc. Like forrest gump said - that's one less thing! | Indeed indeed |
05-07-2010, 02:58 PM
| | Registered User | | Join Date: Dec 2006 Location: Phoenix, AZ | | Quote:
Originally Posted by rbonner Notice the connector that is GROUNDED? That is the MInus Lead, the other is the plus.
BOB | I notice that they look different. But which one is grounded...I am not sure.
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05-07-2010, 02:59 PM
| | Registered User | | Join Date: Dec 2006 Location: Phoenix, AZ | | | I also intend to add another speaker...soon. So I would like it to be correct so I can just add it.
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05-07-2010, 07:43 PM
| | Registered User | | Join Date: Dec 2009 Location: NC | | | Now it becomes a no-brainer. Wire it positive polarity, or in phase. Any other way will be incorrect.
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05-07-2010, 07:51 PM
| | Registered User
Endorsing Artist: SWR Amplifiers | | Join Date: Jun 2004 Location: Sydney, Australia | | | A reversed-phase bass cabs can be really distracting & disconcerting to a sound tech, if you're using a PA as well as your amp. If you're in any doubt, borrow a known good (correct-phase) cab and do the battery test on both. Save yourself a future headache. |
05-07-2010, 10:12 PM
| | Registered User | | Join Date: Aug 2006 Location: Inverness, FL | | | What does an improperly connected speaker sound like?
I have a feeling one of my speakers may have this problem. My cab is quite trebly and has a hum and click when I attack hard (GK SBX+).
Sorry for the hijack.
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05-08-2010, 06:24 AM
| | Player Characters fear me... Moderator | | Join Date: Nov 2002 Location: Middletown CT, USA | | Quote:
Originally Posted by powellmacaque What does an improperly connected speaker sound like?
I have a feeling one of my speakers may have this problem. My cab is quite trebly and has a hum and click when I attack hard (GK SBX+).
Sorry for the hijack. | in a single speaker enclosure it sounds identical to a properly wired one. in an enclosure with one properly wired and one wired with reverse polarity the most obvious thing will be a drop in lows.
9v battery test will confirm this in .1 seconds |
04-02-2011, 01:19 PM
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Endorsing Artist: Beards. | | Join Date: Aug 2005 Location: Ottawa, Ontario | | | 9v battery test? How?
Never mind. Really should read the whole thread (DUH)
Last edited by Strongjag : 04-02-2011 at 01:23 PM.
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04-02-2011, 01:37 PM
| | | | If you only have one speaker there is no problem. If you have two or more out of phase speakers you will get phase cancelation issues. This may not seem like an issue depending where you are in the room. As you move around the room you will notice the sound gets louder in some spots and quieter in others. One speaker will be pushing while the other is pulling. When it comes to speakers the positive/negative thing is for reference only. The battery test is a good one for detecting this. | | Thread Tools | Search this Thread | | | | 
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