Limited market in the Philippines, but a good concept. Might be essential if you're a working band (ie, professional big bucks) and want to hear your instrument above or apart from the mix (as you can pan your instrument hard right, then the mix hard left).. Problem is, this will be limited to instruments that can be "silenced", ie - electric guitars (with effects), electric bass, drums, synths. If the band has acoustic instruments - brass, percussion, string section -- what, then? Even an acoustic guitar is a challenge, unless the band has a "silent" guitar or a variax.