Tube Preamp/ McCormack Amp impedance matching

Whether it is optimum or not is ultimately determined by your ears, your expectations, and your speakers (not listed). I agree it sounds like an adequate match on paper but there is much we do not know.

I would forego the pursuit of impedence matching devices and wait until you have done a lot of serious listening to the basic set up with your speakers. If it ain't optimum to you then consider if the sound's inadequacy is caused by an impedence mis-match or something else. It could be corrected by something as simple as a tube selection in the pre-amp (isn't that why we like tube amps/pre-amps? :-), and not need impedence matching devices to get you where you want to go.

FWIW

Hi Foster -

In terms of impedance matching, the VTL 2.5 will work very well with the DNA-500. Subjective quality is something else entirely, but I suspect that you will be pleased with the result.

Best regards,

Steve McCormack
SMc Audio

My concern is the effect of impedance on HF or low end roll off. Newbee, my speakers are the Ohm Walsh 5000. I also have 2 powered subs that would be connected to the 2nd set of pre outs on the VTL so that plays into impedance as well.