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Markbass CMD 151P vs CMD 151P IV vs JB Player's School

Hey everyone. I might be getting sucked into a MB 1x15 rig. I'm curious what the difference between these are aside from the JBPS has no tweeter and less wattage. The first two amps are over $1k and the JBPS is $500? There has to be more of a difference than just "this one doesn't have a tweeter and it has less power." Anyone ever been able to directly compare these amps?
 
Hey everyone. I might be getting sucked into a MB 1x15 rig. I'm curious what the difference between these are aside from the JBPS has no tweeter and less wattage. The first two amps are over $1k and the JBPS is $500? There has to be more of a difference than just "this one doesn't have a tweeter and it has less power." Anyone ever been able to directly compare these amps?
The CMD151P, both version lll and IV, are twice as powerful, have a much broader frequency response, are more efficient and much lighter than the JBPS amp.
The CMD151Ps are pro grade, the JBPS, not so much..