| Sick sounding cabinets [message #50] |
Sat, 20 May 2000 10:37  |
BC
Messages: 583
Registered: March 2000
Location: Kentucky
|
Senior Member |
|
|
|
Back in March of this year I posted an entry on the VG head seeking help regarding a newly acquired 2x15 cabinet that sounded great by itself.....but terrible when paired with another cabinet. The consensus from the Kustom gang was that one of the cabinets was wired incorrectly and the speakers were moving in opposing directions. Since it was a rainy day around here I took the back off and found the red lead from the cabinet jack was on the black speaker lead. Since the plug connectors were still intact I simply reversed the leads and put the back on the cabinet. ( I also took the opportunity to search for treasure in the cabinet and restaple some of the insulation.....no treasure this time!) The results were astounding! I now umderstand why Mike Brando loves the twin 2x15 setup for bass. If I had had this 25 years ago I would never have sold my first Kustom amp! Thanks to all! BC!
|
|
|
|
| Re: Sick sounding cabinets [message #61 is a reply to message #50] |
Thu, 01 June 2000 09:41  |
|
|
|
A little "trick" you can use to check speaker polarity (or phasing as it may be called) is to take a flashlight battery such as a common "D" size cell & connect the speaker's black ground lead to the negative side of the battery & the red (positive or hot) lead wire to the positive side of the battery. Look at the the speaker cone when you touch the hot (positve) lead to the speaker. The speaker cone should move out. All of your speakers should be moving in the same direction.
You can rig up a little homemade tester with a 1/4" plug on the end so all you have to do is plug it into the speaker cabinet back. You might want to install a simple single pole/single throw (SPST) toggle switch in one of the wires so you can turn it on & off. Make sure you have enough lead wire to get around to the front of the cabinet so you can see the direction of the speaker cone movement.
If you need more power, try a 9 volt battery. Don't worry, there's not enough current in these batteries to harm the speaker. Just enough to push the speaker in one direction & keep it there so you can easily see the direction of the cone movement.
Art Kulak
|
|
|
|
VintageKustom.com
Search
Help
Members
Register
Login
Home
]