I have encountered a weird problem with my Wall of deaf (Mesa Bass 400, Strategy 400, 2x10 and 1x15 Diesel cabs) I bought 4 EVM ten inch speakers a while ago to replace the Eden speakers (in one cab) and the blown up EVM in the other cab (+ the good one in that cab because they're 16 ohm speakers) When I play the 2x10's through the Bass 400 (6x6550 tubes) the cones go in and out violently, with a nasty distorted sound. When played through the Strategy 400 (6x6L6 tubes/channel) they sound awesome, no excessive cone movement. Slap tones come out clear at high volumes and it handles the low B extremely well... The Bass 400 sounds great through the 1x15's, no problems at all (same results as the 2x10/Strategy combi) In this clip: Youtube link the stack is cranked up to deafening volumes (we had a gig the day before which I did with less cabs, forgot to put the volume down on the Strategy and there was no time for a line/soundcheck ) Most of the sound you hear comes from the 2x10's, there was a mic in front of one 1x15 (no DI) 15 inch speakers are EVM15L 8 Ohm 400 watt 10 Inch Speakers are EVM10M 8 ohm 200 Watt (2x10 cab specs 4ohm 400Watt) Can anyone here give give an possible explanation for this weird amp/cab behaviour? stayin' ahead of the "no pic no stack" crowd: The stack with the old 10 speakers (with cheap substitute for the blown up EVM) "New" 10 inch speakers EVM 15L: The other EVM15L: Eden 1060F 16 ohm 150Watt (retired, keeping them as spares) EVM 10 16 ohm 200 watt, will be reconed to 8 ohm and also kept as spares.