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  #1  
Old 08-25-2009, 12:57 PM
Greg_E Greg_E is offline
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Default S639 output volume high enough?

I had an E438 that I liked except that the volume was not loud enough to drive anything over about 16ohms. I was just wondering if anyone knew anything about the output of the S639?
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  #2  
Old 08-25-2009, 01:21 PM
Dreamnine Dreamnine is offline
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It's loud enough - it drives my Grados fine with a volume setting of 20 out of 30.
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Old 08-25-2009, 06:00 PM
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The DarkSide The DarkSide is offline
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I had an S639, and even though it was rated @5mw per channel, it was more than loud enough. Sony tends to downplay the actual volume level on most of their players, so you should be fine (except w/giant sized headphones of course).
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Old 08-25-2009, 07:46 PM
Greg_E Greg_E is offline
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Thanks, I'll have to go to BestBuy and take a look. Hopefully these will play aac+ mp4 files just like the e438 did. My old Archos Jukebox10 (30GB drive now) has been around for a long time and it would be nice to get something new.

The Sony USA website still won't admit that these are in the USA, had to grab the drivers from Canada.
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Old 08-25-2009, 08:12 PM
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The S639 plays unprotected AAC's just fine. All the new Sony's do.
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  #6  
Old 08-26-2009, 09:51 AM
Greg_E Greg_E is offline
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aac+ (HE-AAC) not aac, huge difference in compression. 64k is good with aac+ which leaves a huge amount of space for music. It is approved for use with most mp4 video and h.264 codecs. I'm pretty sure that the chip they are using supports it in all the newer players, just need to get over there and check it out before the sale is done.
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  #7  
Old 08-27-2009, 09:40 AM
Greg_E Greg_E is offline
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I can say that this player definitely plays aac+v1 encoding properly when it is done in the mpeg4 mode (.mp4).

I can also say that while it is slightly louder than my E438, it is still not nearly enough to drive many headphones. The 40ohm pair of AKG that I tried is just about OK as long as the music is from a recent disk with nice high levels, older disks will not provide enough volume for listening. Now if you go to a set of 600ohm AKG, there is just plain not enough output to do the job! The same thing shows up when I connect to the line in on my car stereo.

It's going back to BestBuy and hopefully they will just give me a refund, might as well use the E438 that Sony stuck me with.
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Old 08-27-2009, 11:24 AM
JK98 JK98 is offline
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Are you satisfied with how the S639 works with your Sony V6? The Sony players are probably good with efficient low impedance headphones, however I wonder how well it does with headphones over 60 ohms that are average or below average in efficiency. It seems like Cowon and Samsung may be the only player makers that focus on having a higher output(at least 20 mw per channel)?
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Old 08-27-2009, 03:17 PM
h1a8 h1a8 is offline
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I had a s739 and it was loud enough. The s639 is the same exact model except only differed by not having noise cancellation.
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  #10  
Old 08-27-2009, 04:30 PM
Greg_E Greg_E is offline
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Pretty much I think that just about anything over 24 ohms is going to be too quiet for older discs that are not mastered at the highest level possible like newer disks. It does not seem to use replay gain/normalization tags to boost those quiet tracks.
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Old 08-27-2009, 05:52 PM
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Marvin the Martian Marvin the Martian is offline
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Quote:
Originally Posted by Greg_E View Post
Pretty much I think that just about anything over 24 ohms is going to be too quiet for older discs that are not mastered at the highest level possible like newer disks. It does not seem to use replay gain/normalization tags to boost those quiet tracks.
It's not just the ohms that matter.....the sensitivity is very important too. I'll bet a pair of PX100's would utterly crank out of an S639....and they're 32 ohms.
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Old 08-27-2009, 05:55 PM
Dreamnine Dreamnine is offline
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The Dynamic Normalizer, when switched on, makes everything louder.
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  #13  
Old 08-28-2009, 10:59 AM
Greg_E Greg_E is offline
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Still doesn't perform as well as my ancient Jukebox10, no matter what you want to say about efficiency it just does not have the oomf to do what I need, and I suspect that many other people will agree (just like with the E438). They used good technology, but it really needs an output amp and not to drive the output directly from the DSP like so many DSP companies suggest you can do.
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