I would call Rogue and speak with Mark. You may have a resistor going.
Rogue Magnum M-120 Loses Volume at Power Up
One of the two recently acquired Rogue Audio Magnum M-120 mono blocks loses its volume at power up. Music does not completely cut out but is very low in volume. After about 15-30 minutes of warm up, it regains the volume and is even again with the other amp.
Checked the tubes and found they are fine - both quad sets put out the same output. Also switched set of tubes, switched speakers, and determined that culprit is that same amp.
This problem has been consistent each time the amps are turned on from cold. The volume level returned to normal level after about 15-30 minutes from initial power on. In conclusion, the "Right Side" amp does not seem to be performing at its optimum in comparison with the "Left Side" amp.
Checked the tubes and found they are fine - both quad sets put out the same output. Also switched set of tubes, switched speakers, and determined that culprit is that same amp.
This problem has been consistent each time the amps are turned on from cold. The volume level returned to normal level after about 15-30 minutes from initial power on. In conclusion, the "Right Side" amp does not seem to be performing at its optimum in comparison with the "Left Side" amp.
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