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Re: Amp kicks out on Mic ONLY with 8 ohm to 70 V Xfmr on Amp outputI have used the trick of wiring between the left and right + but agree with the others that this is used for a 'poor man's' surround as it results in reproducing the difference between the two channels rather than the sum of them.The phono input is intended specifically for that use. In fact you are may be looking at things backwards as a phono input on a receiver like that would usually be intended to be connected direct to a phono source with there then being an internal RIAA preamp, so the last thing you would want to add as an additional external preamp. What you really need is an appropriate input or an external mic preamp and line level input.I have a feeling that since you are apparently running the wireless microphone into the phono input, which likely has an internal RIAA preamp, and then using the difference between the channels for the output that those two factors are causing your problems. This may be a situation of having limited funds but you seem to be trying to 'band aid' a consumer system that is really not appropriate for the use and will probably never be anything other than problematic. This is a pro audio forum and maybe this is a good opportunity to suggest a pro audio solution.
Re: Amp kicks out on Mic ONLY with 8 ohm to 70 V Xfmr on Amp output
I have used the trick of wiring between the left and right + but agree with the others that this is used for a 'poor man's' surround as it results in reproducing the difference between the two channels rather than the sum of them.
The phono input is intended specifically for that use. In fact you are may be looking at things backwards as a phono input on a receiver like that would usually be intended to be connected direct to a phono source with there then being an internal RIAA preamp, so the last thing you would want to add as an additional external preamp. What you really need is an appropriate input or an external mic preamp and line level input.
I have a feeling that since you are apparently running the wireless microphone into the phono input, which likely has an internal RIAA preamp, and then using the difference between the channels for the output that those two factors are causing your problems. This may be a situation of having limited funds but you seem to be trying to 'band aid' a consumer system that is really not appropriate for the use and will probably never be anything other than problematic. This is a pro audio forum and maybe this is a good opportunity to suggest a pro audio solution.
