At its puissanece and is not bad at all for this award. background music for voice, sequencers or live in small configuration or repeated, it is also very good! by level against after-sales service, voice system is "hummm how to say?" no hurry to be polite, even lethargic. summarize: sound and value for money 9 of 10, reliability and after-sales service (especially) 3 of 10