Source | Info |
---|---|
Stereophile | Stereophile: May 1997, vol 20, iss 5, Reina |
Stereophile | https://stereophile.com/tubepoweramps/597sonic |
Stereophile | https://www.stereophile.com/tubepoweramps/597sonic/ |
Audio Review | https://www.audioreview.com/reviews/Amplifier/product_3398.shtml |
Stereophile | Stereophile: Mar 1999, vol 22, iss 3, Rubinson |
Audiophilia | https://www.audiophilia.com/hardware/power2.htm |