2. amps-preamps
  3. 1259806333

Passive Preamp works with Dynavector p75?

I am toying the idea of getting a passive preamp. My sources are EAD transport/DAC and a Clearaudio Emotion TT going thru the Dynavector p75 Phono Preamp. Downstream components are Mcintosh MC122 and Magnepan SMGc.

My question is, sonic benefit aside, will it works? I never understand the impedance-electric circuit requirement behind passive preamp setup but seem to remember that it might not be a simple plug-n-play. Your advice is appreciated.
millicurie999
shakeydeal
979 posts
 
>You will probably be surprised by the increase in clarity and refinement, but very possibly also disappointed with the lean and undynamic sound<

If he goes with a transformer or autoformer type passive he won't be disappointed. They don't have the issues with dynamics or leanness that you speak of.

Shakey
millicurie999 OP
57 posts
 
Thanks everyone. So may be I should connect the p75 directly to the Mac and see what happen. Now my question is: Are you sure it won't damage my speakers because the output volume is too high?
herman
2,274 posts
 
The MC Gold has an output of .4mv. This combined with the P75 gives a total output of just 575mv.

That is not the maximum output, it is the output with a standard test track. The maximum is higher so it could well be that it will drive an amp with .8V sensitivity to clipping especially on a hot record.

You also need to be concerned about the low input impedance of the amp. If you get a typical passive with an impedance of 10K or so the phono stage will see that and the 10K of the amp in parallel for an effective impedance of around 5K at higher volumes. I couldn't find a spec for the output impedance of the phono but it it is on the high side, say >500 ohms your sound will suffer.

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