anyone know what the difference is?

It's Auto/no MPX filter or Auto/with MPX filter.

X

...and the MPX filter does? :scratch2:

MPX filter filters the 19Khz stereo carrier frequency. What you hear as hiss when listening to FM.

X

thanks punker! :thmbsp:

no problem..

Technically Bolly I believe the filter de-emphasizes the signal a little bit making it a little more mono as the case may be, giving you less hiss in the signal ...

Steve

Technically Bolly I believe the filter de-emphasizes the signal a little bit making it a little more mono as the case may be, giving you less hiss in the signal ...

Steve

Some tuners do this, typically called Hi-Blend, the KT-7500/7550 uses an additional low pass filter in the audio amp section.

X

Tks x ... thats good to know :)

Steve

I think I have the manual for the 7550. I still regret selling it years ago. PM me if you want a copy.
Steve

Strawman, that would be most excellent! PM on the way. :thmbsp:

I'd pay for a copy if you'd make one. Have PM'd.

Bully & Bolly (that's funny), Made copies, need to pick up some envelopes this afternoon, should be able to hit the post office tomorrow.
Steve

That's awesome Steve, you da man! :thmbsp:

It's in the mail.

Punker...

I have always assumed that using the MPX Filter setting on my KT-8300 is a good thing.... can't say that I can hear a difference most times though.... (OK... I just listened carefully using my Grado headphones, and there is a difference)

Are there specific situations when you would want to avoid using the MPX filter?

(not sure, but I suspect it uses a similar circuit as the KT-7500)

Use it when you hear hiss, if you don't hear any hiss leave it off.

X