[tvhead]

Lextek,

I will probably wait till version 2.0 comes out or until I know for sure that the headphone jack will double as something else that I will find useful.

Or maybe I'll buy it tomorrow!

 

[Joe Bloggs]

I = V / impedence

Higher current = even lower impedence than 8 ohms was used to measure output

 

[morphsci]

Quote:

Originally posted by tvhead blr, My point is that if you guys knew there wasn't a standard, there would have been second guesses about the the 30mwpc from the get go. It was in fact the exact opposite! As I said, one reviewer stated the iPod had 6.5mwpc, you guys' conclusion was that he/she didn't do their homework. If you guys really felt there wasn't a standard, then this review should have automatically prompted you to think that maybe just maybe apple rated the amp at 8 ohms, but it didn't!! We all fell for the 30mwpc claim just like I did. What irks me is that you guys are acting like you knew all about it. My Rotel integrated amp is rated at 35wpc at 8 ohms. It's not much but it plays way louder than I'll ever set it at, and it'll play just as loud and without the strain as those Kenwoods listed as 100wpc. I think I read in some magazines that this is due to higher current. What the heck does that mean?

You also have to know at what level of THD it was measured at

. There are no standards for those ratings. Take them with a bushel of salt.

 

[Joe Bloggs]

No, that reviewer didn't do his homework, he didn't know that Apple had already claimed a 30mw output, and seeing as there no standard of measurement whatsoever the only valid 'homework-worthy' measurement is the one that Apple gives

 

[tvhead]

Morphsci,

Yes, even with the missing THD (whatever that is

) and impedance information, still the only things I heard from you guys was, "wow, this is cool. 30mwpc!" and "This should be enough to power the HD600s."

 

[tvhead]

Joe,

I think the reviewer was the only one who did do his homework. He was probably closer to the actual rating than you or Apple. (at 32 ohms that is)

 

[morphsci]

Quote:

Originally posted by tvhead Morphsci, Yes, even with the missing THD (whatever that is ) and impedance information, still the only things I heard from you guys was, "wow, this is cool. 30mwpc!" and "This should be enough to power the HD600s."

You did not hear that from me. Nor will you. THD = Total Harmonic Distortion. If you drive an amp into distorting you can get a lot of power, but no music

 

[tvhead]

Morphsci,

Hey, thanks for the information. The reviewer that no one trusts said at the max volume there was a slightest bit of distortion. Maybe, the iPOD just has a low THD?

Anyways, I'm going with Lextek on this now. If it sounds good, it sounds good. I just can't burst my eardrums with it.. I would have liked a little bit more performance space though. Can't have everything.

 

[MacDEF]

Quote:

My point is that if you guys knew there wasn't a standard, there would have been second guesses about the the 30mwpc from the get go. It was in fact the exact opposite!

Actually, if you read the iPod thread, several people wondered aloud what impedance the 30mW was measured at.

Quote:

As I said, one reviewer stated the iPod had 6.5mwpc, you guys' conclusion was that he/she didn't do their homework.

He didn't. Since he has no way of measuring the output, and the specs are 30, he couldn't accurately say 6.5. That's all people were saying.

Quote:

the only things I heard from you guys was, "wow, this is cool. 30mwpc!" and "This should be enough to power the HD600s."

Who said that? 30mW is not enough for HD600 IMO.

Anyways, I'm curious to try one at comfortable listening levels. I'm not one of those people who needs to be able to crank an amp up -- far past any level I would ever listen at -- to see if it distorts. As long as it powers my speakers/heapdhones at the levels I listen at, I'm happy

 

[Joe Bloggs]

Quote:

He didn't. Since he has no way of measuring the output, and the specs are 30, he couldn't accurately say 6.5. That's all people were saying.

To quote MacDEF.

Besides, can't you see I was joking??

<--

 

[tvhead]

MacDEF,

I don't crank up the music either.. I just like to know that I can if I ever wanted to. Kind of like a sports car. The speed limit is 65mph.. So why bother making cars that go 200?

BTW, YOU were the one who said that 30mwpc will drive the hd600s. Yeah, 5mwpc will drive hd600s too, well enough to get a little whisper out of them. But I don't think that was what you were saying. I think you meant the 30mwpc was enough to get some decent music out of it. Granted it won't be to the level of a good home headphone amp..

I mean that was the impression I got from your statement.

"60mW = 30mW per channel.

You won't be able to use an external amp, because it doesn't have a line-out jack.

30mW/ch will drive HD600s, but not to their potential. Still, for a portable, 30mW/ch is a lot."

I can't seem to get that quote thing to work for me.

I also found something else that was interesting. The impedance of the included headphones is 32 ohms. Would you honestly think that Apple would stoop so low as to rate the amp based on 8 ohms instead? I realize that this is what this whole thread is about, but it just seems so much more wrong knowing that we were led to believe that 30mwpc are supposed to be coming out of their own 32 ohm headphones! Seriously? Apple saying, "Oh you'll get the 30mwpc, as long as you don't use our headphones." I just can't believe Apple would be that deceiving.

Maybe the amp is 30mwpc at 32 ohms. And maybe there is some kind of limiter built into the software to protect the consumer's ears.

Of course, if I was some billionaire or Moby, all of this wouldn't matter.

 

[Joe Bloggs]

There's also the issue of voltage driving versus current driving, I suppose, and which the iPod is better at. For example someone has noted before that the Sony D-E725 apparently goes louder than the Pana SL-CT580 even though it has the lower rated amp. Yet the sound out of the Sony was much more coloured at the same volume than the CT580. One can only suppose that the Sony gives more voltage swing despite having less power.

So, take your HD600 or whatever you have and listen to the iPod again, this time paying attention to the *quality* instead of the *quantity* of sound. Maybe you'd find that the quality is great and the quantity is adequate for normal listening?

 

[tvhead]

I think that was what Morphsci was trying to say about the THD, or atleast it is related to the end result. It may play louder, but there is probably a lot more distortion.

I'm tired of this thread.

Lextek says it sounds good. I'll take his word for it. I could only listen to in the apple store at the mall, so it's hard to judge.

I just want to be like that guy in the ipod commercial, dancing to propellerheads and enjoying the music.

 

[Joe Bloggs]

Propellerheads? Can you post a link to the commercial?

 

[MacDEF]

Quote:

BTW, YOU were the one who said that 30mwpc will drive the hd600s.

Yes, but I also said that it wouldn't drive them to their potential