I personally love doing effects on trumpet. I use a yamaha silent brass system, and run an 8th inch on both ends cable from the output of the silent system box to an 8th inch female 4th inch male adaptor, into a guitar effects unit. Then I use a regular guitar cable out of the effects unit to an amplifier, or even to a 4th inch female to two AV male for connecting to a television.
Using echo effects on the trumpet is a blast and will entertain you for some time.
