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Mitsubishi DA stack

mjennens

mjennens

Old Guys Rule!!!
I picked up a Mitsubishi DA-A30, DA-P30, and DA-F30 tonight for $100. The DC offset needed adjusted and a fuse that controls the indicator lights needs replaced. Once I get the fuse replaced, I'll hook it up and see how it sounds. It's pretty clean and from a non-smoking home. Once it gets lit up, I believe it will be a pretty impressive set-up. I've never owned any Mitsubishi stereo gear, so I'm anxious to see how it sounds. The amp looks pretty beefy. I believe it is a dual mono configuration.
Can anyone explain the difference between the AC and DC inputs on the power amp?
Thanks,
Mike
 

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Well, if its like an oscilloscope then DC will amplify any voltage you give it, whereas AC will only amplify the AC component of your input. Typically there is a suitably large coupling capacitor to block the DC component of your signal. The downside? You might lose a couple of dB at the very low end of the frequency spectrum. The DC input will not filter out DC. The downside? You could fry your amp or your speakers if you have DC coming from the preamp.
 
Usually, DC means Direct Coupled. As said above, there is no filter (capacitor). It will pass DC (direct current) right to the amp.

I've never seen the other marked AC.
I imagine it has a cap to block DC.

Pretty easy to tell if you pop the cover and look at the wires on the jacks.
You'll see caps on one set connected to the same line as the DC jacks.

Nice score.
 
That's a nice package. I have had, and have, a few pieces of Mitsubishi gear and it is typically very good quality. It's sometimes is a bit clinical sounding (I've never heard those exact pieces) but that might be another way of saying accurate.
 
I have had the power amp and tuner, excellent gear. One issue to be on the lookout for is the amp cooling. It was done with freon in a sealed tube. The coolant tends to leak out over time which can allow the outputs to get hotter than they should in some circumstances.
 
Raynald said:
I have had the power amp and tuner, excellent gear. One issue to be on the lookout for is the amp cooling. It was done with freon in a sealed tube. The coolant tends to leak out over time which can allow the outputs to get hotter than they should in some circumstances.
Click to expand...

Thanks for the tip. Do you use the AC or DC signal input?
Mike
 
DC or Direct Coupled and Capacitor Coupled if the units are working correctly there should be no noticeable change between operation. The DC/AC inputs, one has a volume control IIRC.

BTW look out for the cable to connect the pre to the amp to control the speaker A/B selection.

Barney
 
I had a stack of the older DA series gear. The one with the analog meters. Very nice sounding equipment. Plenty of power and straight forward approach in operation. Still have the power amp and meter assembly.

The cable plugs into the pre amp and allows you to switch the speakers A/B from the front.


No tuner?



Barney
 
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