opamp burn-in ?

[kithng]

Hi all,

I wonder if I order a new opamps (may be 627) for my supermacro, do I need to go through the burn-in again ?

does every opamp need burn-in ? or just the large cap ?

thanks

Kith

 

[nikongod]

electrolytic/film caps do without a doubt change over time/use. op-amps are more questionable....

 

[john_jcb]

If they do require burn in which I have a hard time hearing in an op amp it will happen over time as you use it.

 

[rickcr42]

Quote:

opamp burn-in ? -------------------------------------------------------------------------------- Hi all, I wonder if I order a new opamps (may be 627) for my supermacro, do I need to go through the burn-in again ?

I burn in everything !

by using it to play music as it was deigned to do.

Don't sweat the details man and just enjoy the jams.If it gets better over time it is a plus and if not it is fine anyway as long as it sounds good right ?

do parts burn in ? yes.You can actually smell it sometimes

does the sound change and if so is it always for the better ?

yes...no......maybe........sometimes.......possibl y

maybe it is our ears becoming accustomed to what straight out of the box was a new thing and a foreign sound ?

could be Rabbit,could be........

I never could understand someone waiting for an amp to arrive then "burning it in" for a couple of days before even listening to it.
I know in my case as soon as it arrives I am tearing open the box,ripping the amp out of the bubble wrap and plugging that sucker in and playing some damn music !
If the amp sounds better the next day for having used it for what it was actually designed for : playing songs---COOOL !

 

[MisterX]

Well put.

 

[Banfi T.]

Every solid state device needs at least 3 days continuous operation to reach their maximum performance. I didn't learned electronics in English so I have a little problem with translating the words, but I promise I look up them somewhere in the net. (In mirror translation this is the time needed for minority chargecarriers to completely dissapear.)

A standstill of temperature state is also needed, since internal capacitance can track the signal up to 10KHz modifying the sound. This is mostly true for class B and AB designes where the the signal results to more current to flow through than the quiscent current. (A reason why tubes and class A sounds better most of the times.) For OPamps with currents in the region of uA and a bulk of plastic it takes a long time to reach some kind of standstill. (Better solution is to heat them op to 40-50 Celsios and keep this temperature.)

Although I never do burn in. I just never switch off anything

 

[IEATTEFLON]

It's certainly a possibility that my mind is playing tricks on me but I noticed a difference between all of my well used opamps to new ones during listening tests. With that said, I keep a certain batch of used opamps at my disposal for my pleasure.

 

[rickcr42]

Quote:

With that said, I keep a certain batch of used opamps at my disposal for my pleasure.

My attitude is to just play music and not worry about the elctronics so much.Many here are so busy listening to opamps and parts they lose sight of what the product is designed for and that is musical enjoyment.

I let the professional reviewers worry such things,they get paid to be anal about every little detail and which opamp sounds better or even with which this or that.

while others swap out opamps and listen to electronics I leave things alone and if the device is a fully realised product that is completly engineered it is what it is.

Any amp that benefits from opamp "rolling" was never fully optimised for the opamp it came with so not a final product.Any product done right will always sound better with the parts it came with or it is from the start a comprimised design.

Just my opinion as usual

BTW-the "I leave everything on" would never work for me unless I somehow manged to get free electricity and an unlimited supply of triodes.
My SS power amps pull 3A continous per channel so that means 6A all the time 24/7,not good for the electrical bills,and my SET amp is a 300B amp and these puppies are not cheap so again not an otion to keep juiced up all the time.
My line level stuff being jfet/mosfet mostly is always powered unless I go away for an extended period but battery stuff obviously cannot also be powered all the time.
Common sense at work means you take what you got and work with it no matter what someone says is "best" in anything.
If I went solely by convention and specs I think my system would most likely be brilliant on paper but sound like crap in the use of.

again.just and opinion and my own

 

[adhoc]

Quote:

Originally Posted by rickcr42 BTW-the "I leave everything on" would never work for me unless I somehow manged to get free electricity and an unlimited supply of triodes. My SS power amps pull 3A continous per channel so that means 6A all the time 24/7,not good for the electrical bills,and my SET amp is a 300B amp and these puppies are not cheap so again not an otion to keep juiced up all the time.

actually, if you left them on all the time, you could potentially save on heating/gas bills at the same time.

 

[rickcr42]

Quote:

actually, if you left them on all the time, you could potentially save on heating/gas bills at the same time.

Only in the winter man.

Summer bills would KILL me when I had to have the AC on high full time just to breathe and not pass out from the heat