Services The Tone Smith offers a virtually unlimited list of capabilities because of our vast knowledge of amps and networking. Within our alliance are custom guitar tuners, amplifier builders and tuners and a wide variety of professional musicians ready to assist you in getting the most from your Two Rock amp. When it comes to our business, we offer our customers a powerful resource and a recipe for success. Listed below is a comprehensive list of services we offer our clients. Help with Amplifier Selection Tweeking Custom tuning Guitar tuning and intonation Custom guitar refinishing