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Hey I just got my darkvoice and I got to say that testing with low impedance headphones isn't the most fun thing to listen to. My volume was pretty quiet even when I turned it all the way up and the music sounded less alive then just plugging my headphones in to my phone. Do any of you know if that has to do with maybe run-in time or becous of the low impedance? Also the smaller tube of the two seemed dirty like a glass from a bad café and it had a small crack in it. Maybe that's becous it sounds weird. Hope you guys can help! Thanks in advance!
IMO, they need 20 hours or more of break in, to get the tubes going. That is just my opinion though. I noticed a HUGE change after maybe 60 hours or so. Are these the stock tubes???
Yes sir, Stock tubes. Thanks for the info.
Also I used them with a vinylplayer and that gave the disapointing sound. Once I used them with my pc they sounded much better. I think I need a new needle.
That could very well be the problem...
Thank you very much for your help!
Senne, one of the fun parts of a Owning a DV, is tube rolling. To keep the price down, companies use inexpensive tubes, so in this case, you look for other tubes to buy and replace the stock tubes. It is fun and can be expensive, but there in lies the fun of rolling tubes into a tube amp.
Far as I know, all tube amps have a sizable output impedance. What this means is if your load impedance (the headphones) is low impedance, most of the power will get used up before getting to your headphones.
Ex: output impedance 120 ohm ; 30 ohm headphones. 30/(120+30) -> only 1/5 of the voltage gets to the headphones.
If output 240 ohm and 30 ohm headphones, 30 / ( 240 +30) = 1/9th.
It might be in the neighborhood of 60ohm output impediance though -> 30 / (60 + 30) = 1/3.
If you were using high impedance headphones like 300 ohm and output impedance is 60 ohm -> 300/ (60 +300) = 5/6 -> hence not really terrible for headphones like 6xx. most of the power is still transferred to the load (headphones).