Valvecaster / TDA2030 Combo Problems

[duck_arse]

erm, C4 on the power amp board, I meant. it looks to me as though that cap is connecting the input signal to the bias node, which is low-impedance to ground. if this is the case, it is either limiting the high high freq for the low impedance input version, or eating the signal with your new higher input impedance, or something else I just can't fathom.

prr would be able to tell us.

[teej]

erm, C4 on the power amp board, I meant. it looks to me as though that cap is connecting the input signal to the bias node, which is low-impedance to ground. if this is the case, it is either limiting the high high freq for the low impedance input version, or eating the signal with your new higher input impedance, or something else I just can't fathom.

prr would be able to tell us.

That was C4 on the amp board.