Charles,
A simple note on the Coincident Dynamo 34SE: as I suspected from the start that this little amp would respond well to upgrades, I must say it has exceeded my expectations. The Dynamo has responded to every tube or wire change in a significant and meaningful manner. All the listening attributes enumerated above in "timbral listening" are truly being met with enormous success with some quality frosting on the cake as Jeff Day stated; for example, the soundstage is big, well-defined, holographic, if you will. Imaging, excellent. On well-recorded material this amp is astounding. It is difficult for me after all these years to comprehend it. And to think, "the best is yet to come," with the Yazaki-san guided changes to capacitor, resistor and internal wire. "Lions and Tigers and Bears, oh my!!!" Best, Rob