Jeff Rowland 501s burn in ... a strange experience

Clavil, the glib answer would be. . . take 2 Aspirins and call me in 6 months.

Here is a more useful answer. . . all new amps need real playing time break-in. . . during this time sound will fluctuate wildly. Different types of amps require different break in times. Seems that amps that operate at lower temperatures require longer break in time. Most class D Rowland amps require about 1,000 hours of REAL playing time to reach peak performance. You should also leave your Capri pre and 501 amps always turned on. . . this is JRDG's recommendation.

Once the amps are broken in, you may want to consider a pair of JRDG PC1 PFC external modules. . . they should yield greater authority and greater subtlety to the sound. Power cords should probably be after that. G.

Clavil, I have developed a fun to use Excel spreadsheet that helps with equipment break in tracking/logging. Drop me a note if you'd like to try it out. G on the 501 break in.

Hi Macro, the answer is. . . it depends. From an efficiency point of view, yes it's a good idea to break in PC1 and amps at the same time. From a financial point of view instead. . . it depends. As for power cords feeding a PC1. . . common sense would suggest that a PC should not have an effect on a PC1. . . reality is different, and power cords affect the sound of at least the JRDG Capri even when a PC1 is interposed. And if you ask, the answer is no, the PC1 IMO should not be used on a linestage like Capri. . . it is only recommended for high power applications. G

There are 2 camps on Capri+PC1. . . . my current opinion is that when Capri is brand new PC1 increases its resolving power to an extent. However, IMO, once Capri is fully broken in, PC1 inhibits full performance of Capri. . . it is worth remembering that Capri has a very small power supply and draws only 6W. Possibly the bank of capacitors in the PC1 may be an issue.
JRDG recognizes there are diverging opinions on Capri+PC1.
Interestingly, several weeks ago I had an interesting conversation with David Elrod about why some of his PCs like the Statement are not indicated for low power applications. . . he indicated that the relatively high capacitance in the Statement does constitute a power reserve for devices that can quickly draw it. . . but low power devices may be hampered by the extra capacitance.
Pls remember I am not an EE. . . the explanation above may be non factual.

Coffeey, admittedly switching amps are not good solutions for the seeker of instant gratification. . . . in fact, most of the hobby is rather for the obsessively inclined, to one extent or an other. G.