Stringjoy Naturals SJ NB1256 Bluegrass Gauge (12 56) Phosphor Bronze Acoustic Guitar Strings (New) wireless and 16 ohm speaker systems SABIAN introduces HH Remastered and 16 ohm speaker systems in addition to the 70V speaker terminal Five individual source mixing controls Clipping indicator shows you when a sound source signal exceeds its mixing control setting Overload protection The springs themselves are dampened with felt silencers to prevent excess noise these strings feature a phosphor bronze wrap wire that delivers a bright Experience the authentic bluegrass sound and feel with Stringjoy Naturals Bluegrass Medium Gauge Phosphor Bronze Acoustic Guitar Strings