I have a tech 21 RBI preamp and a crown xls 802 power amp. The power amp only has xlr female connectors for input. My preamp a 1/4" and an xlr male,but is my DI out. My question is , should I use my DI out which has a level control or use a 1/4" to xlr cable from the pre to the power amp. Which would sound better or is there any difference?