Headamp Blue Hawaii Special Edition - Page 190

Quote:

Originally Posted by David1961 

When using with the BHSE, I think some would suggest you sell the 009's rather than the 007's. 

I know, and others would suggest the opposite. I'll have to listen to both of them and make a decision based on that. I certainly prefer the 009 now, by far, but it doesn't tell much, since I am using the SRM-323II. I'll have a problem though if I prefer the 007 with the BHSE, as far as listening to music with my wife is concerned. 

But, judging by what I read on that topic, I suspect that I may want to keep both headphones, the 009 and the 007, and switch from on to the other depending on what I listen to. In that case I will probably look for used pair of 507 for my wife. 

007 spec is 100 dB/100 Vrms, 009 is 101 dB/100 Vrms - a barely noticeable sensitivity difference - should be hard to tell in casual swapping with both driven from same amp

enough to sway critical comparisons if not corrected in controlled listening - but few ever ask what level SPL each headphone was actually putting out in the reviews I've read

Quote:

Originally Posted by satorarepotenet 

 I'll have to listen to both of them and make a decision based on that. 

That's the best thing you can do.

Quote:

Originally Posted by jcx 

007 spec is 100 dB/100 Vrms, 009 is 101 dB/100 Vrms - a barely noticeable sensitivity difference - should be hard to tell in casual swapping with both driven from same amp

Which means that it should be fine, after all, to use both at the same time, at least on paper. David, who listened to both of them, seems to disagree. I am quite eager, I have to say, to find it out for myself. Still a few months of wait though. I am hoping that Justin will be done with the current batch sometimes before the end of the spring. At any rate, thank you all.

Quote:

Originally Posted by jcx 

007 spec is 100 dB/100 Vrms, 009 is 101 dB/100 Vrms - a barely noticeable sensitivity difference - should be hard to tell in casual swapping with both driven from same amp

Whatever the spec may say, the difference is subjectively much greater than 1db in practice. Not that I was measuring at the time, but I reckon the difference was at least "1 hour" of the BHSE's volume control - when both plugged in at the same time.

Edit: maybe it was about "1 notch", but still a significant difference.

Quote:

Originally Posted by jcx 

007 spec is 100 dB/100 Vrms, 009 is 101 dB/100 Vrms - a barely noticeable sensitivity difference - should be hard to tell in casual swapping with both driven from same amp

 

enough to sway critical comparisons if not corrected in controlled listening - but few ever ask what level SPL each headphone was actually putting out in the reviews I've read

is such spec measured with 1khz sine wave or with white noise? I bet it is 1 khz sine wave. I wonder if lf or hf still have the same sound pressure.

Quote:

Originally Posted by TheAttorney 

Whatever the spec may say, the difference is subjectively much greater than 1db in practice. Not that I was measuring at the time, but I reckon the difference was at least "1 hour" of the BHSE's volume control - when both plugged in at the same time.

Edit: maybe it was about "1 notch", but still a significant difference.

Well, obviously I don't have the BHSE now and cannot tell what “on notch” means exactly, but if it is so, I suspect that I will be just fine using the 007 and the 009 at the same time, for the rare occasions when I listen to music on headphones with other people.  Don't you think?

It is difficult to imagine that one notch is enough to justify this, written by El Doug: ”the 009 will be blasting out your ears by the time you have the 007 at a listening volume”

Quote:

Originally Posted by satorarepotenet 

It is difficult to imagine that one notch is enough to justify this, written by El Doug: ”the 009 will be blasting out your ears by the time you have the 007 at a listening volume”

I've heard the 009's + 007mk1's via my BHSE plugged in at the same time, and El_Doug is right. I also heard both headphones with the SRM007t + SRM717 and with those amps the 009's sounded a lot better than the 007's, the BHSE is a completely different amp though. The only sensible thing you can do is to wait until you have the BHSE and try both headphones.

El Doug's comment may have been ever so slightly over the top, but however you look at it, the differences are sufficiently significant that you can't assume you can have 2 people listening at the same time without there being a problem - unless of course if one of you prefers a louder sound

The time I heard both the 009's and 007's via my BHSE was when IanG visited my place, and I found I could only listen to the 009's for  seconds when the volume was comfortable with the 007's.

well we can compare Tyll's measurements - presumably plotted with 1 kHz normalization - which is where Stax specs the sensitivity - with only 1 dB difference we hardly need to keep track of the offset of the graphs

http://www.innerfidelity.com/images/StaxSR007SZ31576.pdf

http://www.innerfidelity.com/images/StaxSR009.pdf

the 007 does look like it could sound a few more dB lower than the 009 - while nearly matching at 1 kHz (from Stax published specs) there are some few octave regions of the 007 frequency response that are 3-5 dB lower than the 009

while 3 dB is "clearly noticeable" it is often claimed -10 dB difference is required for a subjective "halving" of the loudness

also good to read both parts of the Repeatability article for Tyll's measurements http://www.innerfidelity.com/content/expert-tests-innerfidelitys-headphone-measurement-repeatability-and-reproducibility

Thank you all. One last question: is it possible to use one Dac with two amps at the same time (using both the RCA and XLR) : the BHSE with the 007 and the Stax 323 with the 009 (which sounds fine, in my opinion, that is, much better than the 007, which is obviously underpowered here)?  

Quote:

Originally Posted by jcx 

well we can compare Tyll's measurements - presumably plotted with 1 kHz normalization - which is where Stax specs the sensitivity - with only 1 dB difference we hardly need to keep track of the offset of the graphs

 

http://www.innerfidelity.com/images/StaxSR007SZ31576.pdf

http://www.innerfidelity.com/images/StaxSR009.pdf

 

the 007 does look like it could sound a few more dB lower than the 009 - while nearly matching at 1 kHz (from Stax published specs) there are some few octave regions of the 007 frequency response that are 3-5 dB lower than the 009

 

while 3 dB is "clearly noticeable" it is often claimed -10 dB difference is required for a subjective "halving" of the loudness

This is all interesting indeed, but I tend to trust more people who actually have listened to both phones...

yeah there's a lot of that going around here

Quote:

Originally Posted by jcx 

yeah there's a lot of that going around here

Which means?