Four Hour Tube Amp Warm-Up

My Primaluna Tube amps require a 4 hour warm-up in order to enter the Glory Zone. My previous Muzishare X7 tube amp was the same. Just wondering if this holds with the experience of other tube ampers.


I am really sorry to hear your system requires such an extended warmup. For tube equipment this is simply rediculous. I have owned a PrimaLuna integrated amp for over 10 years in my home office.



I may have never discovered it’s sweet spot.

When did we switch from amps to women?

My experience with warm up time has been so variable over thirty years, variability in comments not surprising to me. I've found system presentation or voicing, tube types and qualities, especially power tubes in amps, standby ability, number of tubes in entire system, AC quality, cabling, on and on ad nauseam, all have bearing of when system kicks in, even mood plays role. I just wonder if there is some point of stabilization applicable to every single little thing in our systems, and ourselves for that matter?


With -20 degree wind chill factors during recent listening session even thought about how temp could be affecting AC cabling exposed to these temps, specifically, could temp of wire affect sound quality? Obviously heat is of concern here, does more heat mean quicker warm up times, cold or cooler longer times? This meant in relation to all parts within components.


I only know every listening session has a point where things just kick in, assuming nothing breaking in. I only find consistency when my system is in static mode, meaning nothing changed over certain length of time.



Just wondering if this holds with the experience of other tube ampers.

@bolong No. It takes our amps about an hour. About 25 years ago our amps took about 3 hours but component improvements have changed that.

Since I initiated this thread things have changed for the better. Now my set up is sounding very acceptable after an hour warm up. Tweaking has helped.

All the power cables are Anticables, and they are all plugged directly into the wall now except for the cables to the Jay's Audio redbook transport and the Denafrips Terminator DAC  - those cables are still plugged into the Shunyata power conditioner. Running the Terminator in oversampling mode is now better.

Speaker cable is now vintage cloth covered Western Electric tinned multi-stranded 10 gauge wire which is complementing the Primaluna's and the Cornwall 4's with no loss of detail and good PRAT. The bi-wire jumpers are vintage 16 gauge Western Electric pink cloth wire which seems to slightly tame the treble. I tried it with 10 gauge WE jumpers, but the treble ran a bit hot that way. This may or may not be logical from an electrical engineering standpoint since the bi-wire terminals all theoretically end up in the same places internally but..whatever.

I have also been re-burning CD's from .flac to .wav (in JRiver) and think they sound better perhaps because of less computing in the signal chain and therefore slightly less noise.

Also discovered a 12au7 tube that was microphonic. Replaced it and now the background is much blacker. Also reinserted some vintage 12au7 Amperex "Bugle Boys" into the signal positions, and this has helped quite a bit. The Primaluna's do not like "alien" 12au7's, but just the Bugle Boys as signal tubes are doing fine.

Also, built some floor attached angling guides for the speakers so that they can be pivoted predictably and in perfect unison relative to each other and the back wall, and the distances between them can be exactly gauged relative to my listening chair. This has improved sound-staging quite a lot.

Tweak City over and out.