Head-Fi.org › Forums › Summit-Fi (High-End Audio) › High-end Audio Forum › Headamp Blue Hawaii Special Edition
New Posts  All Forums:Forum Nav:

Headamp Blue Hawaii Special Edition - Page 174

post #2596 of 5510
Quote:
Originally Posted by Phil95 View Post

Thank you very much, Golfnutz! The video is quite clear, probably because the tube biasing operation is quite simple to carry out. What a relief!

 

Any idea regarding my first question (XLR vs RCA)?

 

Have a nice day.

 

Philippe

OK, have the adapters connected from my DAC to BHSE via RCA 1. Zero hum. Dead quiet. Didn't matter if CD player paused, track changes, no sound between notes, etc.

 

RCA vs XLR sound quality. Listening to Linda Ronstadt - Mas Canciones (which has a very vocal dynamic range).  Unless I had the exact same system for both there's no way of telling. I cannot hear any difference using auditory memory. Put it this way, I won't take the adapters out until I'm done using the amp for the day. If someone switched from XLR to RCA without me knowing it, I wouldn't know...

post #2597 of 5510
Quote:
Originally Posted by spritzer View Post

 

On the amp biasing, anything less than 5VDC worth of offset or balance is trivial in the grand scheme as the amp easily swings 100 times that.  The unofficial Stax figure for their amps is +/-20VDC so anything within that limit is just fine.  Just try to get as close to 0VDC as is possible and it's all good.  Neither of these adjustments alter the operating points of the tubes as they are set in stone so the tubes will not wear out faster if the offset or balance is off by 20V or so.  The amp will not like a massive amount of either balance or offset but that isn't normal behavior so nothing any owner is likely to experience.  

 

Thank you, Spritzer.

post #2598 of 5510

Thank you very much Spritzer for your very positive answers. It seems to me that you master these topics, so let's go on if you don't mind.

 

You write "On many high end sources the balanced output is an afterthought or just very badly engineered so it will always sound worse than the RCA's" I agree with you, and I hope my source (Esoteric K-01) doesn't fall in this camp. In addition, I think that RCA plugs -either on boxes or cables- are a better quality than XLRs, for the same price range.

 

My K-01's menu makes it possible to choose between pins 2 or 3 as "hot" pin for XLR outputs; I must admit that  hear no difference at all between these two options (should be 2 for the SRM007-tII?). Furthermore, a special XLR option boosts the output volume by 6dB; do all these options speak for a serious XLR-balanced circuitry on my K-01?

 

Best regards.

post #2599 of 5510

THank you very much Golfnutz!

post #2600 of 5510
Quote:
Originally Posted by Phil95 View Post

Thank you very much Spritzer for your very positive answers. It seems to me that you master these topics, so let's go on if you don't mind.

 

You write "On many high end sources the balanced output is an afterthought or just very badly engineered so it will always sound worse than the RCA's" I agree with you, and I hope my source (Esoteric K-01) doesn't fall in this camp. In addition, I think that RCA plugs -either on boxes or cables- are a better quality than XLRs, for the same price range.

 

My K-01's menu makes it possible to choose between pins 2 or 3 as "hot" pin for XLR outputs; I must admit that  hear no difference at all between these two options (should be 2 for the SRM007-tII?). Furthermore, a special XLR option boosts the output volume by 6dB; do all these options speak for a serious XLR-balanced circuitry on my K-01?

 

Best regards.

 

 

The Esoteric is fully balanced, it uses eight parallel/differential DAC circuits per channel, XLR output is the definitely the bomb, forget RCA. The hot pin choice in for polarity (phase) for an absolute phase test see here.

post #2601 of 5510

I've both XLR & RCA cables on my BHSE via my K-01 to which switching and listening with one cable to the other can be done in seconds and I can't hear any difference when the setting is on 0dB, I do however use mainly my XLR cables because I can use the +6dB mode if I want to. When I receive the GS-X I'll see if there's any difference using both cables with that amp.

post #2602 of 5510
Quote:
Originally Posted by David1961 View Post

I've both XLR & RCA cables on my BHSE via my K-01 to which switching and listening with one cable to the other can be done in seconds and I can't hear any difference when the setting is on 0dB, I do however use mainly my XLR cables because I can use the +6dB mode if I want to. When I receive the GS-X I'll see if there's any difference using both cables with that amp.

 

 

Potential. That’s what you pay for with balanced circuitry and especially so with regards to your symmetrically designed K-01. Not utilising this potential and resorting to RCA in such a DAC would be plan daft.   wink.gif

post #2603 of 5510
Quote:
Originally Posted by Phil95 View Post

Thank you very much Spritzer for your very positive answers. It seems to me that you master these topics, so let's go on if you don't mind.

 

You write "On many high end sources the balanced output is an afterthought or just very badly engineered so it will always sound worse than the RCA's" I agree with you, and I hope my source (Esoteric K-01) doesn't fall in this camp. In addition, I think that RCA plugs -either on boxes or cables- are a better quality than XLRs, for the same price range.

 

My K-01's menu makes it possible to choose between pins 2 or 3 as "hot" pin for XLR outputs; I must admit that  hear no difference at all between these two options (should be 2 for the SRM007-tII?). Furthermore, a special XLR option boosts the output volume by 6dB; do all these options speak for a serious XLR-balanced circuitry on my K-01?

 

Best regards.

 

The K-01 looks to be fully balanced but without actually seeing the schematic or the output stage close up it's hard to say.  All the options you talk about are easy to implement after the fact.  The previous single box players from Esoteric certainly weren't balanced and derived the XLR outputs from a rather badly designed opamp phase splitter. 

post #2604 of 5510

I'm not going to get into an argument about whether XLR's are better than RCA's, but when I've listened to music using both cables with the 009 + BHSE + K-01 at the 0dB mode, I can't hear a difference. 

post #2605 of 5510
Quote:
Originally Posted by David1961 View Post

I'm not going to get into an argument about whether XLR's are better than RCA's, but when I've listened to music using both cables with the 009 + BHSE + K-01 at the 0dB mode, I can't hear a difference. 

 

The chief advantage is external noise rejection. Dependant on ones individual environment, setup and equipment as to the benefit. Longer cable runs with professional gear for example exploit the advantage to its best. The potential is always better with fully balanced gear, the fact that you cannot hear a difference means influencing external noises for whatever reason are low. biggrin.gif

post #2606 of 5510
Quote:
Originally Posted by johnwmclean View Post

 

The chief advantage is external noise rejection. Dependant on ones individual environment, setup and equipment as to the benefit. Longer cable runs with professional gear for example exploit the advantage to its best. The potential is always better with fully balanced gear, the fact that you cannot hear a difference means influencing external noises for whatever reason are low. biggrin.gif

 

I have read that long XLR cables are better than RCA's at the same length, but both my XLR & RCA cables are about 18" long. The only benefit I find I have when using XLR is I can use +6dB on the K-01.

post #2607 of 5510

Many thanks johnwmclean!

post #2608 of 5510

Thank you Spritzer! "Has the K-01 a fully balanced circuitry when using XLR outputs?" seems to be the subject to debate. Johnwmclean is positive when he answers, but like any man he may be mistaken. Has anyone autopsied a K-01 or carried out tests that could give the final answer? -sorry johnwmclean if you already did so.

 

I think a lot of earphoners use this K-01, so this topic isn't irrelevant in my opinion.

 

Philippe.

post #2609 of 5510

I've never seen one stripped down and most people seem to just drool over the box.  Half the fun for me when getting some new piece of kit is to rip it apart..  tongue.gif

post #2610 of 5510
Quote:
Originally Posted by spritzer View Post

I've never seen one stripped down and most people seem to just drool over the box.  Half the fun for me when getting some new piece of kit is to rip it apart..  tongue.gif

 

Although it's not stripped down, there are photos of the K-01 showing what's inside from above, but they're not very visible. These can be seen on esoteric.teac.com. Just go on the K-01 page then on downloads. 

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: High-end Audio Forum
Head-Fi.org › Forums › Summit-Fi (High-End Audio) › High-end Audio Forum › Headamp Blue Hawaii Special Edition