What is the best method for ensuring that the output of an audio power amp will not distort when driving a non-linear or reactive load?
In this case, the amp is 15W BTL (see link below) and a step down transformer is used reversed to boost voltage to drive an electrostaic plate.
Thank you for any pointers.
Lou Porter
"Lou Porter"
** Use a suitably well designed amplifier. ** No where near enough info supplied by you or the kit supplier.... Phil
You can add some R's and L to the load and make it look resistive to the amp.
-----+------+ | | R1 R2 | | C L | |
-----+------+
I use when driving inductors but in principle it should work with a cap load too.
Let R1=3DR2=3DR and RC =3D R/L.....L=3D 1/(C*R^2)
Just adding R1 might be enough to make the amp 'happy'.
George H.
This is a first. I feel the need to be nastier than Phil!
Just how good is a $10 amp? Who the hell would use a cheap ass amp to drive electrostatic speakers? If anything, you would go with a transformerless design. It has been done with tubes.
If you really have a non-linear load, either the current OR the voltage, OR BOTH, will definitely be 'distorted'. That cannot be changed by any kind of clever design...
Global feedback is the general solution, otherwise.
The testing of audio power amplifiers is exclusively into resistive (linear, nonreactive) loads, according to some of the laws regarding false advertising...
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