I plan to try the AB100 at lower, +/-30V rail voltages and increase the output bias current as suggested before by multiple members, including NP. Do I really need the 4 output pairs, then? From a SoA point of view even 1 TIP142/147 pair would be safe at 4 Ohm load, whereas 2 pairs seem to be an overkill already. How many pairs would you use at +/-30V rails and why? If it is less than 4 pairs in the end, do I need to adjust something in the front-end?
Thank you,
Miklos
Thank you,
Miklos
Thank you, osscar, for confirming. I would be also interested to learn if there are "audible" arguments for more/less output pairs when technically they are all fail safe. I read here and there that "more pairs are better because of lower output impedance and THD" while others say that "single pair is the best due to lacking degeneration issues" etc. Not being experienced enough myself, I am somewhat confused how to find my way across such apparently contradicting statements. What would be your educated guess?