For any newbies reading this, you should know that the heavier strings are louder.
I went frim 13's to 12's to 11's to 10's before I found the right strings for me/my music.
The 10's are probably about 3/5 loud as the 13's . . .
It's a very noticable volume difference.
If you play acoustically w/ 10's, and someone else is playing with heavy guage strings, you're going to have to strike the strings a lot harder to have an equivalent volume.
Your best bet is to plug in (hopefully you bought an acoustic guitar with a built-in pickup), and crack the volume a tad . . .
Personally, the volume has never been a real issue with me. But I do agree the heavier strings tend to have a fuller sound.
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There's another consideration about acoustics w/built-in pickups. As any set of strings get older, the strings get a duller sound.
Most acoustics w/ pickups have equalizers. Ranges are typically low, mid, high and 'bright.'
Learn how to use that equalizer.
I can get a great tone, electronically, w/ old strings.
Using my Kustum amp, and dead strings w/equalizer, I am constantly being told by my audiences how great the tone is on my guitar.
And that's with worn out, dull-sounding, extra light guage (10's) strings.
Here's a tip for acoustic guitarists: boost the bass and cut the midrange. Get them perfect, first, and then, very slowly and very carefully adjust the high end. Your guitar/amp combo might be different than mine, though.
Give your guitar to a friend, set your amp to "playing-live-volume" get 30 feet in front of the speakers, and have him play a few chords. Tell him what to boost/cut on the levels. And
remember the settings.
One more tip.
My Amp has a woofer and a horn. As you all know, the woofer's lower tones go out in just about every direction, but the higher tones from the horn go out fairly straight.
That means that you'll be hearing about the same low-end as your audience, but you will NOT be hearing
any high end at all.
When my guitar/amp are set for perfect tone (for the audience), and I'm not using a monitor, the high notes sound very faint to me.
If you are in this situation, don't make the mistake of boosting th treble until it sounds right to you, because your audience will think it sounds shrill and tinny . . . and they may not say anything about it, either . . .
. . .
. . . umm . . . geez, I just saw how long this post is . . .what a blowhard I am . . .