Yes, they are, even if they’re in the “brighter half” of this diagram—everything to the mellow side of them would be, as they either have round cores or not-round windings. Boomers do have high end and definition but they have zero “new string zing.” They are all about oomph. I use them on my Yamaha BB734A and BB735A.The GHS Boomers are dark? View attachment 7152620
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