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What makes RSA amps any better(or more $$) than my CMOY? - Page 2  

post #16 of 74
Quote:
Originally Posted by nattonrice View Post

Stereophile reviews are done by ears other than your own (just like any other review) and should be taken as such.

 

 


A product being worth it's RP is a purely subjective thing that by nature is different for every individual.


Hope this review & measurement will convince you to put a lid on it too.

http://www.stereophile.com/budgetcomponents/906ray/index3.html

 

 

post #17 of 74

Wow Ray, your comments to a few here just made your stock go up in my book lol.

post #18 of 74
Thread Starter 

Thanks for the links Ray, but I don't see why you think what I have wrote is offensive(as I was only questioning the quality of a product, and stating my honest experience with the product), as I was only asking for some measurements(which you gave), but someone told me the sterofile review is based on hearing alone, and my response was based on that.  I can see you that you will take offense to comments that challenges your products because you make money from the product, but as a consumer, I question all products I consider purchasing.  I'll say again, I could not hear a difference, but others may hear a difference.  Right now I have a quality amp made by Burr Brown inside my CMOY, and I am happy with that, I will look up some measurements on the Jlabs CMOY and decide for myself.  Where can I find info about your circuit design(the opamps and circuit design etc...)?  It would be helpful for me to gain some knowledge on that.  


Edited by High_Q - 6/9/10 at 5:21pm
post #19 of 74

Quote:

Originally Posted by Ray Samuels View Post

Hope this review & measurement will convince you to put a lid on it too.

 

 

I don't think that one should base a purchasing decision purely on a Stereophile review. As always in this hobby one should seek to audition an item before committing.

Reviews are good for getting an idea on what an item might sound like. They in no way tell you what you will hear personally.

 

I didn't agree with the statement "you have to admit..." based on the subjectivity of a product "being worth its price", so I commented on it as such.

I didn't agree with the statement of a cmoy being comparatively simple to all of your amps.

 

This is a discussion forum... I believe I was discussing, no?

post #20 of 74
Quote:
Originally Posted by High_Q View Post

Right now I have a quality amp made by Burr Brown inside my CMOY, and I am happy with that, I will look up some measurements on the Jlabs CMOY and decide for myself.  Where can I find info about your circuit design(the opamps and circuit design etc...)?  It would be helpful for me to gain some knowledge on that.  

 

Which Burr Brown are you using?  There's a gazillion different one's, not that you could hear the difference.    j/k 
 

post #21 of 74
Quote:
Originally Posted by Ray Samuels View Post

Hope this review & measurement will convince you to put a lid on it too.

http://www.stereophile.com/budgetcomponents/906ray/index3.html

 

 

Measurements are only given for 150 and 100K ohms and higher in figure 4, could you post measurements at 1V into 25 ohms? 25 is a nice round number between 16 and 32: the common range for IEM's. I would assume what most people would use a  portable amp with. I know, I know, never assume! People will do the dumbest things if left to their own devices and try to use these little amps with full sized high impedance headphones, but lets see how it does when used as a reasonable person would guess it was designed to be used: with a low impedance portable headphone. Perhaps such as the UE-5 or UE-10 as mentioned in specific in the article.
 

Also, in figures 5 and 6 distortion and IMD spectra are only shown into an 8Kohm load. Would you be so kind as to publish distortion spectra into more realistic headphone loads? Perhaps 300, 100 and 25ohms.

post #22 of 74
Quote:
Originally Posted by nikongod View Post


 <<<People will do the dumbest things if left to their own devices and try to use these little amps with full sized high impedance headphones, but lets see how it does when used as a reasonable person would guess it was designed to be used....


My SR-71A sounded very nice with HD 650 when I owned them...plenty of power. I even used mine to audition the HD800 for the first time...OH the horrors!

 

The nice thing is that low gain is low enough for sensitive IEMs and has good volume range.

post #23 of 74
Quote:
Originally Posted by Anaxilus View Post

Wow Ray, your comments to a few here just made your stock go up in my book lol.


Why?

post #24 of 74

Yeah, that comment wasn't the best PR move, but oh well. I enjoy the SR71 as one of my favourite portable amps of all time. I've used and heard the protector and find it quite nice, but I'm not about to say that it is godlike - that is Unreal.

post #25 of 74


Yeah, that's what I was thinking. If anything, his stock just went down in my book.

Quote:
Originally Posted by The Monkey View Post




Why?

post #26 of 74

Quote:

Originally Posted by guitargeek View Post

but u gotta admit their protector is worth its price. being the first and only (so far) portable balanced amp, the price is justifiable. maybe the others aren't that.


So I made a 4 channel CMOY with a differential splitter running off of a pair of 9V's...

 

Quite honestly, a simple CMOY with an active ground will be about the same as most other commercial portable amps out there.  Even better if you bias the opamp into class A, but then you run into an issue regarding portable and battery life :P.  Having taken a peak into a few commercial portables, most of the internals are just really pretty, but when you come down to it, they're just your standard opamp circuits with most of the differences being in the casework (non-inverting compared to inverting, etc.) and the selection of components (yay ugly brown vishay-dales!).

post #27 of 74

I'd have to say Ray Samuels did overreact a bit there, but just coming out and posting, showing that he does care about what people think of his products does overall put a good mark for him in my book. Even if he was takine High_Q's comments out of context and being a bit rude, I appreciate him taking the time and effort to find information to back his products up.

post #28 of 74

so cool that head-fi is a place where the owner/designer will respond to posts about their products


Edited by rhythmdevils - 6/9/10 at 10:14pm
post #29 of 74

The better the source the more difference you will hear. With some sources I don't hear much difference in amps because they don't have much to work with but as the quality of the feed gets better, with the RSA amps, the refinement comes through in an audible reward. 


Edited by jamato8 - 6/10/10 at 7:52am
post #30 of 74
Quote:
Originally Posted by jageur272 View Post

Quote:


So I made a 4 channel CMOY with a differential splitter running off of a pair of 9V's...

 

Quite honestly, a simple CMOY with an active ground will be about the same as most other commercial portable amps out there.  Even better if you bias the opamp into class A, but then you run into an issue regarding portable and battery life :P.  Having taken a peak into a few commercial portables, most of the internals are just really pretty, but when you come down to it, they're just your standard opamp circuits with most of the differences being in the casework (non-inverting compared to inverting, etc.) and the selection of components (yay ugly brown vishay-dales!).







honestly, I know nuts about such circuitry stuff. but if u are able to make a cmoy with a sound close to the protector without copying its components, I'll give it to you.

plus, there's a reason why RS is so famous for the amp he makes. his amp is considered a luxury good. want an analogy? here's one: why do people buy LV/Burberry merchandises when there're counterfeits that serve the same purpose and look the same for the untrained eye? taste and preferences dude. it's called value-added service.
Edited by guitargeek - 6/9/10 at 10:36pm
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