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Post by rustystrings777 on May 8, 2012 13:37:35 GMT -5
I'm new to Tone Tubby speakers. I just purchased a 2x12 cab with 40/40s. They are 8 ohms wired in series (16 ohm cab). My question is how the response, tone, etc. might be effected if I wire them parallel (4 ohm cab)? I'm pairing them with a mesa boogie 22 studio+ using the 8 ohm speaker jack. They sound great, very close to the Celestion G-12H currently loaded in the amp (one of my favorite speakers), but I just wonder if I would get better response if I rewired the cab. Thanks.
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Post by chptunes on May 10, 2012 7:21:05 GMT -5
Welcome rusty!! Scott at South Valley Vintage Amplifiers says this: "..The difference in sound of the two possible wiring schemes is related to inductance. The parallel wiring scheme would provide the least inductance and therefore would have a bit more high-end sparkle. The series wiring scheme would provide a higher inductance and therefore, would be slightly more inhibitive to high end frequency response. It is important to note, that we are talking about minor tone changes here, that are not dramatic differences. Again, let your ears be your guide." Read more of Scott's wisdom here: www.svvintageamps.com/speaker.php#question23 |
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Post by rustystrings777 on May 12, 2012 8:50:29 GMT -5
Thanks for the reply, Scott. That's what I expected. Right now, @ 16 ohms, and this is the best I can describe it, it just feels tight and a bit restrictive...The speakers don't seem to want to bloom. I've used everything under the sun over the past 45 years (JBL, EV, SRO, JENSEN, CELESTION, ALTEC LANSING, ETC.) and I know some speakers just open up more naturally than others. If the 40/40s are in that category that sounds great but doesn't open up as easily as I might like, that's okay. I can use them for specific styles that don't require it. I just wondered if the impedance would affect that. Any thoughts? Thanks...
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Post by chptunes on May 13, 2012 8:45:45 GMT -5
Wikipedia has a long 'Impedance Matching' page. Their opening statement is this: "In electronics, impedance matching is the practice of designing the input impedance of an electrical load or the output impedance of its corresponding signal source in order to maximize the power transfer and minimize reflections from the load." -Wiki I like an impedance mismatch with my Carmen Ghia and H1 Tubby. The change in tone is not subtle. There is a noticable volume drop [not extreme, but obvious].. the attack is dampened and softened.. the tone is a couple of shades darker, overall. Maybe a little added dose of natural compression too... rusty, since you're already running this type of mismatch, I'd try the rewiring and take a listen. But, be sure that your Boogie can handle the load. An 8 ohm OT tap driving a 4 ohm cabinet is usually not recommended. Another option to test is just one 8 ohm Tubby, which would be a matched load. Let us know if you find any profound results. Happy tinkering.  |
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