SD251-CL Ð Professional In-Ear Studio Monitor Whether youÕre mixing a recording or monitoring a bass line, you want earphones that deliver high-definition bass and super-transparent highs across an ultra-wide dynamic range. Our SD251-CL in-ear monitors feature to fulfill your needs to compose your own tunes in peace, doesnÕt matter where you are Ð at a price that is very kind to every budget!