Replace Mark Levinson ML-2 with MJ15024/15025 need help

[AndrewT]

It looks like the ML2 spec you are quoting shows that the ML2 cannot pass it's maximum ClassA output current into a 2r0 load.
14.14Vpk & 7.07Apk into 2r0 is that 50W into 2ohm.
This is -5dBV relative to the specified 80W into 4r0.

 

[RobertS61]

4 Amps peak shared by eight complementary powertransistors.
That's 128Watts peak and 64watts RMS Class A power for a 2 ohms load.
Then it's going into Class AB for the remaining 80 Watts or so.

 

[AndrewT]

post18 & post22 state different values.

 

[RobertS61]

post18 & post22 state different values.

That's correct because the initial writer of this thread explained that he only could get .50 Volts at the Testpoints meaning 50/56 = 0.9 amps bias at each TO3 instead of the specified .56V which would give 1A.
3.6 Amps bias gives you a tad over 50 watts Class A at a 2 Ohm load instead of the 64 Watts with 4A. You can do the math yourself probably.

 

[mat0633]

Mark Levinson ML2 Bias Help

Hi there,
Anyone can help me with locating the bias pot and bias measurement point of Mark Levinson ML-2? I have a pair of the ML-2 but the heat sinks are cooler than what it should be. They play and sound OK but not as good as my previous pair. I guess they are needed to be re-bias.
Thanks!
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