Topic: HIMD Line in / Mic in -->impedance

[loul69]

Hi, i looking for these impedances. Mic-in and Line-in.
I own a RH1 but it would be the same for all the HiMD i think..
Anyone know that?

Thanks

[guysonic]

Hi, i looking for these impedances. Mic-in and Line-in.
I own a RH1 but it would be the same for all the HiMD i think..
Anyone know that?

Thanks

Usually Sony MD inputs are very similar if not identical.  Sometimes the input/line impedance is noted in the owners manual on the specifications page.  Typically MIC input is ~ 4700 ohms, LINE is usually ~10 times higher at 47000 ohms. 

This is why bass filters designed for mic inputs don't work well using line inputs.

[loul69]

Thanks, so what i have to do is to make a "varying" bass roll off depending of my input...

[dkarDaGobert]

This is why bass filters designed for mic inputs don't work well using line inputs.

hm
this is the reason why my cmc8 -> spsb8 -> mt2496 (line-in) records have no bass?

good to know ^^

i though the bass roll-off settings have been wrong

[guysonic]

This is why bass filters designed for mic inputs don't work well using line inputs.

hm
this is the reason why my cmc8 -> spsb8 -> mt2496 (line-in) records have no bass?

good to know ^^

i though the bass roll-off settings have been wrong

Usually the LINE input is 10x higher ohms, so bass filter would have 10x LOWER frequency point of operating. 

If a filter working MIC input is rated at ~100 cycles, and if instead is working into a typical LINE input, that same filter would be rated for 10 cycles which is like having NO BASS reduction.   

So your lack of bass working into LINE input doesn't explain why there's not enough bass for your tastes in the recording.

[loul69]

So here is the truth 
My father had mesured the impedances on saturday and here are the results.
For  the MZ-RH.
Mic in : 6800 ohms
Line in : 68000 ohms

Hope this can help you.

Bye

[Church-Audio]

So here is the truth 
My father had mesured the impedances on saturday and here are the results.
For  the MZ-RH.
Mic in : 6800 ohms
Line in : 68000 ohms

Hope this can help you.

Bye

How did you measure them? Using a load and ohms law? or a Ohm meter? Or an impedance meter?


Chris Church

[loul69]

No, with an impedance meter 
My father has one.
I think this is this one
http://www.directindustry.fr/prod/solartron-analytical/analyseur-d-impedance-de-gain-et-de-phase-13588-132298.html

[Church-Audio]

No, with an impedance meter 
My father has one.
I think this is this one
http://www.directindustry.fr/prod/solartron-analytical/analyseur-d-impedance-de-gain-et-de-phase-13588-132298.html

Will your Dad adopt me? 

[loul69]

 
I don t know if he wants another child...but why not if u come to France. He is building for me a 3-wire bbox with preamp so that the impedance won t be a problem with a line in or mic in input...can t wait having it    .....

[Church-Audio]

I don t know if he wants another child...but why not if u come to France. He is building for me a 3-wire bbox with preamp so that the impedance won t be a problem with a line in or mic in input...can t wait having it    .....

Ok well if he does not want another child I understand, if he can just send the impedence meter that would be sweet Thanks...

Chris
Let me know how your preamp turns out ok.

[loul69]

"Let me know how your preamp turns out ok."
-->Sure, no problem.