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The diary entries of a little girl in her 30s! ~ Part 2 - Page 185  

post #2761 of 21761
Quote:
Originally Posted by tomscy2000 View Post

If NBA superstars were IEMs...
Dwight Howard : FitEar TO GO! 334
Russell Westbrook: Final Audio Design FI-BA-SS
Tim Duncan : Etymotic ER4S
Kevin Durant: Phonak Audeo PFE232
Tony Parker : Hifiman RE272
Carmelo Anthony: AKG K3003
Rajon rondo: FitEar F111
Paul Pierce: Vsonic GR07
Lebron James: JVC FX700

Fixed that for you
post #2762 of 21761
Quote:
Originally Posted by kiteki View Post

Well, that just single-handedly shot down my argument.

 

Sorry. I didn't mean that mean-spiritedly, even if I ended up sounding glib anyway.

 

People all have different motivations for getting into DIY. For some it's to have a given thing at a lower price than the manufactured version, or because they want a slightly tweaked version. Some simply want to see what it's like to put something together. Not a whole lot of people are into designing equipment end-to-end from scratch, because that is hard -- most are content to work from cookbooks and kits, and modify the design if they feel motivated to.

 

Many of them do cop attitudes regarding commercial products. In some cases the disdain is justified (mass-market receivers do mostly suck; some boutique audio is crap in a nice box), but in many cases it's the self-riteousness many people feel when they work towards exactly what they want rather than accept what's available. Sometimes it gets annoying. It's usually the veteran DIYers who've developed an appreciation for the designs of mass-market goods. These days, since all mass-market and most mid-fi electronics are largely chips on PCBs, DIYers have looked to 1970s and 1950s designs as starting points.

post #2763 of 21761

I want a personalized caption beside my avatar too frown.gif

post #2764 of 21761

What would you have it say?

post #2765 of 21761
Quote:
Originally Posted by eke2k6 View Post

Fixed that for you

I tried to stick with the people most prominent in the spotlight; Rondo, Parker, Pierce aren't "super"stars, and Westbrook is not quite there yet, either. However, these choices work as well.
post #2766 of 21761
Quote:
Originally Posted by ardgedee View Post

What would you have it say?


I dunno.I'd probably go for something funny like " the only thing truly neutral in this world is Sweden. or there's the "how do you properly drive headphones without a steering wheel'. I'd go for humor the Sweden one would be my first choice.

post #2767 of 21761
Quote:
Originally Posted by tomscy2000 View Post


I tried to stick with the people most prominent in the spotlight; Rondo, Parker, Pierce aren't "super"stars, and Westbrook is not quite there yet, either. However, these choices work as well.

 

Ah, true... though, they are actually superstars to people who follow the sport.

post #2768 of 21761

Originally Posted by ardgedee View Post

 

Not a whole lot of people are into designing equipment end-to-end from scratch, because that is hard -- /

 

Challenges are fun, it's human nature.

 

DIY has many layers, I like 'finished DIY', high-end designs for cheap, like the "Asahi Texas AK4396" I used to recommend, some minor important tweaks... then suddenly it made me stop listening to everything else completely.

 

Remember this user? 100x100px-LS-1177bdb6_hizaki1.jpeg  We had a lot of fun with that DAC.  I wonder if he reached the end of his sonic rainbow with it... I recall one day he said "it completes me".

post #2769 of 21761
Originally Posted by DigitalFreak View Post
the only thing truly neutral in this world is Sweden /

 

That was only because Hermann Göring had a Swedish wife. =p

 

We even make spaces neutral by... removing them.  Eckliastikexpeditionsprotokollhandläggare.  Makes me confused in English sometimes.

post #2770 of 21761

Hmph, a very interesting read from Mike of Headphonia. I've wondered about the Portaphile 627. The review also got me even more interested in the ALO Continental V2. Seems like that tube amp can't do any wrong on these forums. I'm surprised we don't see more keystrokes on these forums concerning the 627.


Some 627 specs taken from the site

 

 

Quote:

The Portaphile 627 uses three Burr Brown OPA627′s, one each for the Right-Left-Ground channels. Each opamp is then buffered with two Burr Brown BUF634s per channel for a total of 6 buffers. This allows the opamp to work efficiently at powering your headphones regardless of being large high impedance headphones or small low impedance current hungry earphones. The OPA627 is widely considered to be the best opamp for audio applications and is the reason I built the new Portaphile around this high end opamp.

 

Three Channel Design, Isolated Output Ground, Four Layer PCB, 3 x OPA627 , 6xBUF634′s, Jung Multiloop Topology, Powered by Single 3.7V Lithium Ion (Included, Rated for 500 Charges), Power Adaptor/Charger Included (5V), Runs 4 Hours on a full charge, Battery charges in 2.5 Hours when Ampliifer is charged while off, External Hi/Low Gain Switch (7/2), Small Size (2.824′x3.19″x.748″), Elna Cerafine

 

Pardon my ignorance but what the heck is a Jung Multiloop Topology ??


Edited by DigitalFreak - 11/25/12 at 12:45pm
post #2771 of 21761
Quote:
Originally Posted by DigitalFreak View Post

Pardon my ignorance but what the heck is a Jung Multiloop Topology ??

 

Tangentsoft to the rescue again!

 

A Jung Multiloop adds output buffering both inside and outside the feedback loop. As for what that means, follow the links from the link above. I'm not sure how helpful the added detail will be to you; having not done much studying of amplifier circuits, the significance of many design decisions tend to be lost on me.

post #2772 of 21761
Quote:
Originally Posted by DigitalFreak View Post

I want a personalized caption beside my avatar too frown.gif

You know what they say......be careful what you ask for.wink_face.gif

post #2773 of 21761

I can't believe they just reviewed the Portaphile 627.

 

 

Jung Multiloop Topology is about how the feedback and buffers act within the amplifier.  You put buffer chips before the headphone output chip to increase the mA power.

 

 

I don't know how to write this without sounding like a total snob, I don't think that thing is the ultimate OPA627 amplifier, and how many people are using Tesla T1's for portable use?  It has four BUF634's in it... I'll try that setup now..., funny my extra BUF634's arrived two days ago and I'm listening to OPA627 now anyway!

 

Maybe I need to visit that Headfonia 'store' and compare amplifiers. =p

post #2774 of 21761
Quote:
Originally Posted by DigitalFreak View Post

I want a personalized caption beside my avatar too frown.gif

popcorn.gif

post #2775 of 21761
Quote:
Originally Posted by kiteki View Post

I can't believe they just reviewed the Portaphile 627.

 

 

Jung Multiloop Topology is about how the feedback and buffers act within the amplifier.  You put buffer chips before the headphone output chip to increase the mA power.

 

 

I don't know how to write this without sounding like a total snob, I don't think that thing is the ultimate OPA627 amplifier, and how many people are using Tesla T1's for portable use?  It has four BUF634's in it... I'll try that setup now..., funny my extra BUF634's arrived two days ago and I'm listening to OPA627 now anyway!

 

Maybe I need to visit that Headfonia 'store' and compare amplifiers. =p


Exactly what sort of rig are you using?

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