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RSA MUSTANG P-51 . little amp BIG sound . image 1, 28, 30, 55, 59, 61 Reviews, 30, 34 . Post... - Page 68

post #1006 of 1171
5/9/09 at 11:36pm
I am getting a AKG 701 soon and ER-4P. Can anybody comment on how these sound with those? I am torn between getting this for the ER-4P/S or getting a desktop amp for the AKGs.
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post #1007 of 1171
5/9/09 at 11:49pm
I don't like the P-51/ER4 combo. For my tastes, the ER4 needs an amp with a laid back sound which the P-51 is not. I think you'd be happier with the AKG's if you had a desktop amp...unless you need portable.

The ER4P is easy to drive but will improve with a nice amp...one with impedance and bass boost options is nice.
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post #1008 of 1171
5/10/09 at 12:12am
The ER4 will do better with the Predator or SR71a, IMO.
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post #1009 of 1171
5/10/09 at 12:29am
Thanks for the suggestions. I emailed Ray a few days back and he suggested the same thing. I prefer crystal clear clarity (mind you not sibilance) and detail retrieval. I am not a bass head, however, the bass there is I want to be tight and punchy. I listen to pop, metal and female vocals.

Well the AKGs are more likely to stay at home not sure yet. The ER-4Ps / Audeo Phanksfor travel. (And yes trhe wallet is starting to hurt!)

I will be using the iphone or the laptop as source. Which brings me up to next point -- what kind of LOD + DAC (for the iphone for poratble use) and DAC (for the laptop) do you guys recommend. I think for the time being I would prefer not to by both a portable Amp and Desktop so I thought getting a really good portable amp would be a good compromise.

I guess I get concerned when people mention that the SR71a is laid back since to me it almost seems like a code word for dark / veiled. But perhaps my impression is wrong.

From reading about the P-51 -- it seemed like it fit my tastes hence the post.
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post #1010 of 1171
5/10/09 at 12:50am
Quote:
Originally Posted by allbald View Post
I will be using the iphone or the laptop as source. Which brings me up to next point -- what kind of LOD + DAC (for the iphone for poratble use) and DAC (for the laptop) do you guys recommend. I think for the time being I would prefer not to by both a portable Amp and Desktop so I thought getting a really good portable amp would be a good compromise.
So you're planning to buy a portable DAC/amp combo?
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post #1011 of 1171
5/10/09 at 12:56am
Quote:
Originally Posted by GreatDane View Post
So you're planning to buy a portable DAC/amp combo?
Not necessarily. The amps I seem to like don't have pre-amps built in.

So I assume the choice is either directly go to the amp from the iphone or use some sort of LOD from the iphone then possibly use and DAC + Amp, right? Or perhaps I am missing something?
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post #1012 of 1171
5/10/09 at 1:01am
If using your iPod you don't need a DAC. You would only have access to the analog audio output, hopefully via LOD.

The DAC/amp combos have analog input and digital input. The digital input will mostly be USB but brands such as iBasso offer coax and optical input also.

For under $300 it seems that the iBasso D10 DAC/amp is top choice. You might have seen this long thread about the D10.
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post #1013 of 1171
5/10/09 at 1:10am
Quote:
Originally Posted by GreatDane View Post
If using your iPod you don't need a DAC. You would only have access to the analog audio output, hopefully via LOD.

The DAC/amp combos have analog input and digital input. The digital input will mostly be USB but brands such as iBasso offer coax and optical input also.

For under $300 it seems that the iBasso D10 DAC/amp is top choice. You might have seen this long thread about the D10.
I think I would prefer to go for the higher quality aamp then. I think I read about the wadia itransport (which is able to bypass the ipod/itouch internal DAC and output a digital stream) and thought there might be something similar in the portable realm but I guess not. A DAC for iphone use would generally be a waste then.

So back to SR71a vs P-51. The other thing that's nice about the P-51 is the rechargeability which the SR71a doesnt have. Seems pretty annoying.

I guess the SR71a amp is not considered subjectively better than the P-51 necessarily but rather some people think that its a better fit with brighter sounding IEMs/cans?
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post #1014 of 1171
5/10/09 at 1:18am
The two 9 volt batteries will cost another $22 or more plus a charger. The advantage with the SR-71A would be more voltage equaling more driving power...not needed with IEMs but would be desired for many full size cans.

I hope to do my own P-51/ SR-71A comparisons soon if my wallet allows.

I think you're right about which is better. It will depend on your specific needs(which monitor/s) and sound signature preference.
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post #1015 of 1171
5/10/09 at 1:30am
Quote:
Originally Posted by GreatDane View Post
The two 9 volt batteries will cost another $22 or more plus a charger. The advantage with the SR-71A would be more voltage equaling more driving power...not needed with IEMs but would be desired for many full size cans.

I hope to do my own P-51/ SR-71A comparisons soon if my wallet allows.

I think you're right about which is better. It will depend on your specific needs(which monitor/s) and sound signature preference.
I think jamato8 who started this thread has both (or tested both) and definitely seemed to rank the less expensive P-51 higher, granted though that he has different iem/can preferences.

Makes it pretty hard to decide since its possible that if let's say the P-51/ER-4P or AKG 702 is could generally be considered bright to most reviewers here vs the SR1a and the same combos. However, it's possible that to my ears bright is normal/neutral. I would definitely say that my tastes probably lean toward bright compared to most folks but how much brighter I like it compared to the average is hard to say.

Would either of these be able to drive the AKG 702s sufficiently or do you need a more powerful amp?
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post #1016 of 1171
5/10/09 at 2:28am
I also like a somewhat bright sound...and plenty of bass. I guess i want it all.

So the question is: Can these amps drive the 701/702 to a satisfying level?

Well, I've only listened to friends 701 and never with portable amps. With not enough experience I will only guess that HD 650 is more demanding and the P-51 does a fine job at low to medium volume...it almost gets there but falls short with bass heavy music at higher(approaching unsafe) listening volume. With my Woo Audio 3 tube amp my ears beg for mercy long before the amp gives out.
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post #1017 of 1171
5/10/09 at 3:34am
Quote:
Originally Posted by GreatDane View Post
I also like a somewhat bright sound...and plenty of bass. I guess i want it all.

So the question is: Can these amps drive the 701/702 to a satisfying level?

Well, I've only listened to friends 701 and never with portable amps. With not enough experience I will only guess that HD 650 is more demanding and the P-51 does a fine job at low to medium volume...it almost gets there but falls short with bass heavy music at higher(approaching unsafe) listening volume. With my Woo Audio 3 tube amp my ears beg for mercy long before the amp gives out.
I am going through a lot portable gear changes ( as in I need to start over ). So assuming I get the P-51 and am using it to drive the 702s from a laptop -- what DAC and cables are recommended from a laptop?

I think when the new iphone comes out -- i'll probably get the ALO cryo 18g stuff from iphone to amp but need to understand better what would be good from a laptop as well including cables?
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post #1018 of 1171
5/10/09 at 5:45am
Quote:
Originally Posted by allbald View Post
I will be using the iphone or the laptop as source. Which brings me up to next point -- what kind of LOD + DAC (for the iphone for poratble use) and DAC (for the laptop) do you guys recommend.
I am using exactly the same sources, but different phones (Westone 3 and Grado RS-1i).
I started with a Predator because I thought it would be nice to have one tiny amp for all purposes, but I was not too happy with it, especially with the internal DAC (the Predator sounded much better with the iPhone than with my notebook)

So I went for an external DAC (Devilsound), an external amp (Mustang) and a home amp (EC/SS) and am really happy now.
For my iPhone I am using a Quables LOD.

The change was not too good for my wallet but very good for my ears

From my experiences I would stay away from DAC / amp combinations.
Some are having a good amp, some are having a good DAC, but in combination ...

Jochen
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post #1019 of 1171
5/10/09 at 10:47am
Quote:
Originally Posted by allbald View Post
I am going through a lot portable gear changes ( as in I need to start over ). So assuming I get the P-51 and am using it to drive the 702s from a laptop -- what DAC and cables are recommended from a laptop?

I think when the new iphone comes out -- i'll probably get the ALO cryo 18g stuff from iphone to amp but need to understand better what would be good from a laptop as well including cables?
I can't help but recommend the HeadAmp Pico DAC. At its $350 price I believe you'd have a tough time finding a better option,especially if you want to eliminate the need for external power. I've listened to the Pico DAC and it sounds identical to my Pico DAC/amp combo so I don't agree that a combo like this can't be good, in fact I think the amp section sounds great.


HeadAmp Pico DAC

The cables you'd need for a USB DAC like the Pico would be either a 3.5mm to 3.5mm or stereo RCA to 3.5mm. You probably already have a USB Mini-B cable for connection to the laptop.
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post #1020 of 1171
5/10/09 at 12:13pm

More pics

Here's 2 more pics of the wine/gold combo in real light with no flash. My previous pics may have misrepresented the true colors of the amp.





Although depending on the viewing angle from the light source it will appear to be a much darker wine.

Edit: Oh and I really love this little thing! One of the things that amazes me is that the volume of playback has no factor on the perceived information delivered. I can listen at a very minimal volume and still appreciate all of the aspects of the music when through other mediums it would require probably a moderate volume (If that makes any sense ). Thanks again Ray!
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Head-Fi.org › Forums › Equipment Forums › Portable Headphone Amps › RSA MUSTANG P-51 . little amp BIG sound . image 1, 28, 30, 55, 59, 61 Reviews, 30, 34 . Post images . Monitors pg 1