Leave XPA1's on.

[bluemeanies]

There are some people who believe in burn in time for speakers, amps and cables. The truth for me is I really don't know about two out of three of these objects of audio enhancement.
I recently received two XPA 1 gen2 amplifiers and and wanted to know if there are people here who leave their amps on for burn in purposes when first purchased.
If so how long?
If not if do you believe in burn in time at all and how long while in use.

Thanks

[audiobill]

I burned mine in by listening nonstop!

[Boomzilla]

The salesman at the local audio saloon advises leaving solid state equipment on ALL the time. He says it sounds better. To me, it seems wasteful to let the equipment idle for 23 hours a day, consuming electricity all the time, for one or less hours of music listening. I do find that most of my solid state equipment takes from 15 to 30 minutes to warm up and sound really good. Therefore, I try to turn it all on 30 minutes in advance of a movie or a listening session.

As to brand new equipment, I do leave mine on for the first week or two. Why? Because if it's going to fail, it will usually do so in the first two weeks of use. If it survives that initial period, then the failure rate drops to a low constant for the service life of the equipment rising exponentially at the "wear out" phase. Since Emotiva offers a five-year warranty, though, it's less critical than for manufacturers that offer shorter warranty periods.

[ludi]

Another argument to leave equipment on is because most failures happen during switching on. I always switch everything off when I'm away for more than an hour. I haven't heard a (big) difference between cold and warm Emotiva equipment, in the past with an old Yamaha amplifier I heard some small difference.

[garbulky]

I leave my amps and DAC on. I find the sound improves after about a day or two. But it's "subtle"

[bluemeanies]

Thanks Boom and audiobill.
Boom you approached the answer to this logically. Turning my equipment on 30 minutes prior to use makes sense. I think I will do the same. I don't think it is critical to leave them on for two weeks given the extension of the Emotiva warranty. I had read on the this forum where some people leave their equipment on....constantly? Really? I am not I am not in favor of that at all.
I have both of my XPA1's plugged into a the same 20 amp circuit. I know that they only need 15amps however I wanted both amps on the same circuit to avoid a possible ground loop.and the 20 amp circuit was wide opened.

[bluemeanies]

Thanks to all. It seems it's all a matter of opinion. My hearing is not like it was back in my 20's. I do not think I would be able to tell the difference if an amp was left on all night or just turned on.

Thanks to all.

[Bonzo]

I have an Electrical Engineer friend who leaves all of his stuff on all the time. He never turns it off.

Me, I turn it all off.

As to break in period, opinions seem to vary like the wind. My opinion is sort of like Boomzilla's. Just run it for a few weeks in the beginning then take it from there and do what you think works and or sounds best. I know my stuff sounds better after about an hour of running. Much smoother and natural.

[bluemeanies]

Thanks Bonzo,
I think I am going to turn on my equipment 30-45 minutes before I start to listen to anything using ClassA mode for music and AB mode for movies. I also what to hear if there is any difference between those modes specifically in music. I am a bit anal when it comes to critiquing sounds with music. Voices, cymbals, a certain pitch in a guitar and the accent of a horn. All of that being said my hearing is not what is was 40 years ago. To discern between ClassA mode and A/B mode will be an interesting challenge.

PS HAPPY BIRTHDAY Bonzo

[repeetavx]

If they're Gen 2, I certainly wouldn't let them idle in class A. Leaving them, on when your home, in A/B should be sufficient.

[Boomzilla]

We listened to XPA-1L mono amps recently in both class AB & in pure class A modes. We heard no difference that we could reliably identify. That said, all four of the ears between the two of us are 60 years old give or take a few, and the speakers we were listening to (an 18-year-old pair of Paradigm Eclipse BP speakers) are NOT the last word in transparency or resolution. Most who have commented on this forum think that they DO hear differences between the A & AB modes, so listen for yourself before deciding.

We also noticed that although the XPA-1L amplifiers dissipated more heat in class A, neither the AB nor the A modes generated very much. In fact, the single XPR-2 amp that I have puts out more heat than the combined heat output of the XPA-1L pair idling in class A.

Although you're definitely wasting more power letting the amps idle in class A, there is not any concern about overheating, IMHO. Were I you and wanted to warm them up in a hurry, class A. If I wanted to leave them idling for extended periods, class AB. No significant difference either way.

[audiofile]

I didn't "burn in" my XPA-1's...I just started using them. I didn't really notice a quality difference as they got some hours on them. The only real difference I heard was after I upgraded cables in the system and upgraded the speakers. You can burn them in if you want but I don't know that it makes a difference, at least to my ears.

[bluemeanies]

You put the hook in the water...ok I will bite...what kind of speakers and cables?

[deltadube]

im with audiobill I burned my xpa 1s in by using them 14 or so hours a day! cant say they sound any different after 8 months .. just good...

maybe its not the new cables but what the old cables where!

cheers