have this amp too...using it sa rehearsal studio...not the most amazing sound, but it does the job well...3 years running, never had any problems...kapos siya pag malakas na tugtugan...mas ok talaga studio pro 112...for 2k++ more i think, sabay ko sila binile, audiophile cubao din, its alot more amp than the envoy. pero do look around first...got myself an express 112 for 8k...not as loud as the studio pro...but miles away ang tone...its US made, US speakers...