Thanks Al. One thing that the reports I cited answered for me was the magnitude of the FR variance. I didn't know how to convert the impedance and phase angle data into useable information.
As you can see from both reports, the ARC Ref 150 and VS-115 use roughly the same amounts of NF and have similar output impedance stats. Further, the amps were tested by different people at difference times which gives me some confidence that the data is reliable.
As I mentioned above, it appears that using the 4 ohm tap should yield a better FR result. I think it just might be doing that. Short of having an acoustician do precise measurements, I'll go by my ears. Just have to get use to a different acoustic presentation off the 4 ohm tap.
This post and others like it provides important information for folks who want to use tube amps. I think the take-a-ways are the White Paper Paradigms present the extreme cases. As we can now see, my tube amp doesn't neatly fit into the Power Paradigm category. The other take-a-way is that folks looking to match tube amps with speakers should be somewhat mindful about the speaker's impedance and phase angle swings and their tube amp's output impedance. Of course, there's no substituting for a serious listen.
My thanks to Al and Ralph for hanging in there with me.
As you can see from both reports, the ARC Ref 150 and VS-115 use roughly the same amounts of NF and have similar output impedance stats. Further, the amps were tested by different people at difference times which gives me some confidence that the data is reliable.
As I mentioned above, it appears that using the 4 ohm tap should yield a better FR result. I think it just might be doing that. Short of having an acoustician do precise measurements, I'll go by my ears. Just have to get use to a different acoustic presentation off the 4 ohm tap.
This post and others like it provides important information for folks who want to use tube amps. I think the take-a-ways are the White Paper Paradigms present the extreme cases. As we can now see, my tube amp doesn't neatly fit into the Power Paradigm category. The other take-a-way is that folks looking to match tube amps with speakers should be somewhat mindful about the speaker's impedance and phase angle swings and their tube amp's output impedance. Of course, there's no substituting for a serious listen.
My thanks to Al and Ralph for hanging in there with me.