#1
Hi, i want to change to a Roland Cube XL40W amp from an old roland Cube 15W, will it be 2.5x louder than the 15W or is that not how amps work? On the 15W, my volume bar is usually on 2 out 10.

Thanks alot guys, cheers.
Last edited by constepatdyak at Oct 20, 2012,
#2
Doesn't sound like a smart move unless it has more effects.

It's not that much louder.
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#3
You could turn your amp up :shrug;
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#4
Unless the XL40W has specific features that the 15W doesn't (Maybe a larger speaker? More effects?), I would save your money.
Its not going to be that much louder, Maybe a few DBs, but nothing that noticable unless you are in a band situation.
#5
I'm pretty sure somebody on here said that you have to have like 10x the power to double the volume. If this is all about volume, just turn your knob up.
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Last edited by Viban at Oct 20, 2012,
#6
I would say go for it. The 40XL is going to give you much more modeling features. You can get a good sound at bedroom levels with any of the Cubes.
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#7
Quote by constepatdyak
Hi, i want to change to a Roland Cube XL40W amp from an old roland Cube 15W, will it be 2.5x louder than the 15W or is that not how amps work? On the 15W, my volume bar is usually on 2 out 10.

Thanks alot guys, cheers.


if you run both amps at their nominal output then the 40 watt amp would be about 1.4 times louder than the 15 watt amp.

Quote by Viban
I'm pretty sure somebody on here said that you have to have like 10x the power to double the volume. If this is all about volume, just turn your knob up.

+1

if you are only on 2, then you aren't even using all the volume of the amp you have. why would you need more?
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#8
I think we are looking at the wrong end of the stick.
The 40W will be a bit louder at full volume but it will also be capable of being turned down to the levels you are used to.
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#9
Yeah, thanks. The 15W doesn't have any modelling or much features, and I have a great deal on the 40W XL.

-I'm not upgrading for the volume, but more for the benefits of extra modeeling and effects the 40W has, and I can get a great deal on it for $220.

Thanks guys for your answers, I'm buying right now
Last edited by constepatdyak at Oct 21, 2012,
#10
like people have said, the wattage doesn't make much difference to volume but I'm assuming the 40w will have something like a 12" speaker vs an 8" or 10" in the 15w.

the 40w will definitely give a "bigger" sound, even if its not actually that many extra decibels.
#11
Clean headroom, the 15 watt has none, it breaks up at bedroom levels


And due the the larger speaker, I'd call this a worthwhile upgrade
Last edited by seljer at Oct 21, 2012,
#12
Quote by Diamond Dave
like people have said, the wattage doesn't make much difference to volume but I'm assuming the 40w will have something like a 12" speaker vs an 8" or 10" in the 15w.
Yup, the simply move more air. The inverse square law attaches to cone area vs cone excursion.

Quote by Diamond Dave
the 40w will definitely give a "bigger" sound, even if its not actually that many extra decibels.
A larger amplifies virtue is that it can ordinarily change more voltage, faster, than can a smaller amp. It's a spec called "slew rate".

I think that's what you're referring to, at least in part, when you say, "bigger sound'. A higher slew rate, translates to better dynamics in the signal. The clean headroom and a higher rate of voltage change, puts the "pop" into the sound. A loudspeaker with a faster transient response helps out a bunch too.
#13
slew rate has nothing to do with wattage.
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#14
i would say roughly 3-4 DBs, which is significant to a degree. not a crazy amount but loud enough for people to hear a difference.

really the main difference is headroom. 40 watts will stay cleaner louder.
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