Duelund cap break in time

My experience with Duelund cast caps is that they take a long time to burn-in and sound how you described.

Were all of the parts installed at the same time? Please let us know. All the parts you chose do not have that type of sound signature after minimal burn in - 48 hours. One exception are the AN caps. If they are the copper foil ones they can be a tad dark and thick sounding relative to your other parts.

I suggest you give the upgrade at least 48 hours of play before getting too critical. 80% full run in time is around 200 hours, but big changes happen in just 48 hours.

I assume you used the same part values in terms of uf values?

Give it some time. You made a number of changes at one time so there are many variables here. I generally try to make one change at a time. I've never heard this exact issue you speak of with the Cast caps, don't recall tonal balance being an issue.

Yes I did them all at the same time, balance between preferring to do one at a time and getting stuff done while I'm in there.

Same values used for everything.

I'll try to basically ignore it and let it play as much as possible over the weekend and report back.

Arions report of similar results helps me relax a bit ;)

I don't think burnin will create the large changes you are talking about.

There is no such thing as 500-1000Hz bass.  I think what has happened is the amp is not putting out slightly less power so the subs are dominating.  rebalance an see if that fixes it.

If it doesn't, take it back apart, look for a short or open or some sort of miswiring.  we all make errors.

Jerry

Yeah 500-1000 is dumb to say I’m just grasping. I did lose the volume on my woofers (it has a mkdbass and woofer in a 3 way open baffle) and that certainly makes it listenable. Had to turn it down by about 50% though which seems pretty nuts...I can’t see why those changes would reduce power like that although it’s a reasonable hypothesis.

I’ll go back in if another 48 hours or so of playtime doesn’t yield what I would expect in improvement.

There’s synergy that can always have unexpected results, but I can’t imagine any of these parts actually making things worse.

Appreciate everyone’s thoughts:)

It occurs to me...if it was in triode mode it would be a fair bit quieter and a fair bit "softer". The switch is in the correct position for ultralinear but that would be the first place I would look for some sort of wiring damage.

200hrs - my local tech friend use to say to me this with similar caps and parts changes; "get ready for the roller coaster ride", unquote. 

Then i did the same roller coaster ride four more times on different amps, and it was the same patience waiting game every time.  Best of Luck with patience. 

If you had to turn it down that much, there is something wrong with your amp. Open it back up.

if you can't find any problem with the mods, consider unsoldering the new caps at  one end and look for a shorted cap.  basic RLC meters aren't expensive and you can also confirm the capacitace.

Jerry

So I opened it back up and...I had made a very stupid mistake. I'm good at paying lots of attention until I get to the part that seems routine and then I mess that up (this time biasing).

Sounding great now. Well not great great but definitely the direction I wanted to go. Crisper and more detail. I assume that silver wire is gonna take some breaking in as well so it'll be a while before it all settled in but I'm pleased with the direction.