Welcome to the first semifinal showdown of the @Martin Guitar #NoLimitsChallenge! Our remaining 4 contestants are using the Martin SC-10E to push the limits of acoustic guitar, and this week is all about the Blues.

Watch RJ Ronquillo tip his cap to Stevie Ray Vaughan with a slick acoustic version of Rude Mood, and Helen Ibe dispense with competition convention and dazzle with an acoustic blues composition of her own!

Whose cover pushed the limits? Vote for your favorite at guitarworld.com/nolimitschallenge!

Make sure to check out our semifinalists @R.J. Ronquillo and @Helen Ibe music, and don’t forget to tune in next week.