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OTL, Output Transformerless Amplifier User Group.

If you are dealing with fragile drivers

I would consider several points:

The amps can make a lot more power than the drivers can handle! Its only prudent to install a tweeter protection fuse of some kind! One mistake could cost you a fuse or a driver: your choice.

You might also consider putting a coupling cap at the output of the amp. It does not have to be very big and could save you some headaches- after all- the output section of the amp is direct-coupled.

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