atmasphere,

The essence of my post is that although the SS amp has more power capability into low vs high impedances, that doesn't mean the SS amp will have a tonal balance skewed toward the HF when driving an electrostatic speaker. To use our numbers, consider an amp with max capability of 200 watts into 8 ohms, 50 watts into 32 ohms, 800-1600 watts into 1 ohm. Let this amp drive an electrostatic speaker whose impedance is 1 ohm at 20,000 Hz, 8 ohms at 2500 Hz, 32 ohms at 625 Hz. This assumes impedance exactly inversely proportional to freq, although I have ignored capacitive reactance, the true parameter. At 30 watts of output, the amp will put out that same 30 watts into any freq for an even tonal balance. For 200 watts of output, only freq above about 2500 Hz will be undistorted into that speaker, whereas at freq below 2500 Hz the amp cannot put out as much undistorted power, so I agree that under these conditions the amp will sound bright driving the electrostatic speaker.

The essence of my post is that although the SS amp has more power capability into low vs high impedances, that doesn't mean the SS amp will have a tonal balance skewed toward the HF when driving an electrostatic speaker. To use our numbers, consider an amp with max capability of 200 watts into 8 ohms, 50 watts into 32 ohms, 800-1600 watts into 1 ohm. Let this amp drive an electrostatic speaker whose impedance is 1 ohm at 20,000 Hz, 8 ohms at 2500 Hz, 32 ohms at 625 Hz. This assumes impedance exactly inversely proportional to freq, although I have ignored capacitive reactance, the true parameter. At 30 watts of output, the amp will put out that same 30 watts into any freq for an even tonal balance. For 200 watts of output, only freq above about 2500 Hz will be undistorted into that speaker, whereas at freq below 2500 Hz the amp cannot put out as much undistorted power, so I agree that under these conditions the amp will sound bright driving the electrostatic speaker.