2. amps-preamps
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Impedance matching with tube amp

I have a Mccormack DNA 0.5 which has an input impedance of 100kohm. I'd like to get the Schiit Saga preamp, which has an output impedance of 180 ohms. Now, I've read about the 10:1-100:1 ratio of input:output impedance for power amps and preamps, so this wouldn't quite fit that range of ratios. Would this still be a good option, and if not, what other (<$500) tube preamp options do I have?

Thanks!
muffinhead123

Showing 2 responses by atmasphere

atmasphere's avatar
atmasphere
12,097 posts
 
Anyone designing a preamp with a 100K ohms output impedance is in the wrong business...
And none exist, except for passives.

and 600 ohms for the input of the Sphinx is, if correct, by far the lowest I have ever seen in a power amp.
We make a tube preamp that can drive 32 ohm headphones... 600 ohms is the old school defacto standard for balanced inputs. Our MA-2 amplifier input impedance is switchable (600ohms and 200Kohms, balanced), since the low impedance impedance (if the preamp can drive it) is helpful for eliminating any 'sound' from the interconnect cables.
atmasphere's avatar
atmasphere
12,097 posts
 
IOW you're good to go.
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