The Amati name alone tells you that this is a great value for the money. An excellent bass trombone for someone moving from tenor trombone. This has a beautiful sound and a slightly smaller bore to help get more focus.
The Courtois AC131BR Prestige Alto Trombone has all the same features of the AC131R, but adds a trill key feature. A .464-inch to .492-inch dual bore with a detachable mouthpipe design creates excellent response and tone, while a 7-inch Rose brass bell for adds warmth and richness to the sound.