Wondering if anyone can educate me here. I have a Maz 38 SR 2x10 combo. I swapped the stock speakers out for Celestion Greenback 10s. Sounds good but the overall volume seems to have dropped by a third. Same tubes, same everything...Am I missing something?
Post by wubberdubber on Feb 12, 2018 15:24:04 GMT -7
Greenbacks are less efficient than a lot of other speakers, and also not as bright in the high end, so the over-all perception will be lowered volume. You should check your ohm readings, separately and together, just to be sure nothing's going on there.
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The 10" Celestion greenbacks are very inefficient. Meaning for the same amount of power, they're going to be MUCH quieter. That's good for some applications, bad for others. The stock 10" Z speakers are known for being rather efficient (loud), so I could see there being a drastic change in volume for a given setting. The greenback only have 14oz magnets, so at higher volumes, they'll have trouble keeping up, so that could be part of the volume drop. (12" greenbacks have 35oz magnets...still considered a bit small. V30 and G12H have big 50oz magnets.)
I would check the phase...that could also make a big difference. Find a 2 speaker parallel wiring diagram online, and compare it to what you've done. Or if you're unsure, have someone who knows this stuff review your work. If all you did was unclip the 4 leads (2 per speaker), you have to make sure when you put the greenbacks in that you kept the +/- leads correctly hooked up.
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In my experience, and as mentioned by there here, the perceived volume difference is going to be noticeable. I’ve had a few Z combos and cabs with different 10” speakers, I always come back to the G10 Greenback because of the volume drop. That, they sound good to me, and also allowed me to crank my amps up a bit more.
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