Ghs RC-5M-DYB Round Core Bass Boomers NPS Electric Bass 5 String - Medium 045-130Round Core Bass Boomers have a full frequency sound (generous in the low mids) with a clear, soft high end. Nickel Plated steel is wound over a round core, providing a more tactile feel under your fingers. With a balanced construction with the G E strings, Round Core Bass Boomers are consistent across the entire fretboard.