Rogue Audio. Reliability issues? Anyone?

Power tubes are matched for Gm and Ip.

Bias controls static Ip [plate current].

Gm is how much the tube responds to drive change.

Mismatched tubes have more 2nd harmonic, i.e. fat tube sound coloration.

I match drivers, triode halves and power tubes. The difference is clearly audible.

See ieLogical Valve Tester.

@nickrobotron Tube gear is pricy to own. I had a GL KT88 eat its cookies at about 1k hours. [It’s silly to run w/o hour meters.] So now I have GL KT88 spare quad, spare pair and spare.

Most tube gear is pretty simple and easily repairable with a bit of knowledge and a schematic. Of course, if you’re careless it can kill you. $175 seems cheap enough.

I have had an RP-1 for years.  At about 2 years had to replace stock tubes. Then about 5 years had to send it in and have the front control panel board replaced as volume control went wonky. Proly $300 total.  They turned it around promptly. 
 

sounds great and I expect more years of service.  Good value product in my opinion. 

PM me if you need someone to take a look that is reasonable.

There are several KT120's available on eBay. Not my first choice by far, but I had a dead KT120 in my Chronos Magnum when it arrived as new to me used. The previous owner never checked the bias...  So, I picked up a pair. They were Tung Sol and they sound great. 

For the record (is there a record?) I've owned both tube and SS gear for a long time and although there have surprisingly few issues with either one, I can easily say that tube gear has been more reliable by far, and to say otherwise is blasphemy...or something...or you're not me maybe...