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iBasso PB-2 Pelican fully balanced portable, DB-2 Dac . . HiFlight recommended op amps page 16. . - Page 75

post #1111 of 1128

It's still manufactured and sold directly, by iBasso.  

 

Here's the link:  http://ibasso.com/en/products/show.asp?ID=70

post #1112 of 1128

Anyone know what a comparable SQ desktop amp would be to the PB2 with the LMExxxx opamp kit ?

post #1113 of 1128

If anyone has an xpal willy 15 volts lying around that they no longer use with their PB2, please let me know if it is for sale.

I just picked up the XP8000 battery pack the other day.

15 volt one not the 16v one.

post #1114 of 1128

I can't help. but I'm curious why you want the 15V version for your PB2.

 

Mike

post #1115 of 1128
Quote:
Originally Posted by zilch0md View Post
 

I can't help. but I'm curious why you want the 15V version for your PB2.

 

Mike


It is for another amp 15v max just now and then can use with PB2 later.

post #1116 of 1128

Smart!

post #1117 of 1128
I've ordered a pair of NE5532AP at $1.08 each. (Big spender!)

I'm just curious because I keep reading about how they've been used in so many audio devices, but there seems to exist a consensus of disapproval for them - mostly for lack of detail - but I want to hear them, just the same.

Mike
post #1118 of 1128

On a positive note, I used my pb2 today with my hm801, LME 49900 op amps and dummy buffers, the positive here is I used a Hirose 6pin to Dual Female XLR Dual Pin, and now get this on LOW gain, the iBasso pb2 didn't show any signs of power lagg, or ANYTHING when driving two dynamics [30ohms 95+ sensitivity], Which impressed me, in the past when I would Spilt the 3.5mm out into 2 headphones it was Quieter and I lose head room, now spilitting the balanced out... THE pb2 DONT CARE lol, she's got the same grunt and power into 2 dynamics on LOW gain with DUMMY buffers as when driving a single headphone,

 

either way I'm really glad I got this amp :3, and to think I was going to spend $600 on an RSA balanced amp ^^, for half the price I think what I have is just as good if not better :D 

post #1119 of 1128
Quote:
Originally Posted by zilch0md View Post

I've ordered a pair of NE5532AP at $1.08 each. (Big spender!)

I'm just curious because I keep reading about how they've been used in so many audio devices, but there seems to exist a consensus of disapproval for them - mostly for lack of detail - but I want to hear them, just the same.

Mike

 

Don't bother with the NE55532AP.  The "AP" is allegedly the low-noise version of the "P", costing a few cents more per op-amp, but it's horribly lacking in detail, sounds compressed and lifeless, with excessive bass energy, that's very woolly. In fact, the whole spectrum is woolly.  Yuck!  

 

I can only conclude that these op-amps have been used in literally millions of audio devices because they're inexpensive, not because they sound good.

 

I'm glad the experiment only cost me about $6.00 with shipping, but I'm also glad I heard these, as it establishes a reference that highlights just how much better something like an OPA1611 or LME449990 or Muses 01 really is.

 

Mike

post #1120 of 1128
Quote:
Originally Posted by Mshenay View Post
 

On a positive note, I used my pb2 today with my hm801, LME 49900 op amps and dummy buffers, the positive here is I used a Hirose 6pin to Dual Female XLR Dual Pin, and now get this on LOW gain, the iBasso pb2 didn't show any signs of power lagg, or ANYTHING when driving two dynamics [30ohms 95+ sensitivity], Which impressed me, in the past when I would Spilt the 3.5mm out into 2 headphones it was Quieter and I lose head room, now spilitting the balanced out... THE pb2 DONT CARE lol, she's got the same grunt and power into 2 dynamics on LOW gain with DUMMY buffers as when driving a single headphone,

 

either way I'm really glad I got this amp :3, and to think I was going to spend $600 on an RSA balanced amp ^^, for half the price I think what I have is just as good if not better :D 

 

Hey, congratulations on getting a PB2 - with LME49990 and dummy buffers, no less.  

 

It's an amazing little amp and I know from having had one that the PCM1792UK Line Out of the HM801 is wonderful.  

 

Which headphones are you using on the balanced output of the PB2?

 

Thanks,

 

Mike

post #1121 of 1128
Quote:
Originally Posted by zilch0md View Post
 

 

Hey, congratulations on getting a PB2 - with LME49990 and dummy buffers, no less.  

 

It's an amazing little amp and I know from having had one that the PCM1792UK Line Out of the HM801 is wonderful.  

 

Which headphones are you using on the balanced output of the PB2?

 

Thanks,

 

Mike

I guess I forgot to mention that, I used my Modded Denon D2k it's got Lawton Pads, Cocobolo Wood Cups and Lawton Driver Mods, and I also used my W1000x, L3000 Pads and purrin mods, both have Copper OCC cables from BTG 

post #1122 of 1128

Nice!

post #1123 of 1128
post #1124 of 1128

Practical Devices XM6 or the ibasso what you guys think has the most power out of these two.

post #1125 of 1128
Quote:
Originally Posted by ati832 View Post
 

Practical Devices XM6 or the ibasso what you guys think has the most power out of these two.

 

I have no experience with the XM6, but going only on this description from their website...

 

Quoting http://www.practicaldevices.com:

 

... made possible by the XM6's two-chip ultra-low-distortion FET amplification stage, mated to a separate two-chip output buffering stage ...

 

I would be surprised to learn that the XM6's single-ended output, using only four op-amps (two per channel), could be as powerful as the iBasso PB2's balanced output, using eight op-amps (4 per channel).

 

That's a generalization, of course, because power output will vary with the type of op-amp being used and the supply voltage, but I'm still confident that a really power-hungry headphone would be happier with eight op-amps (balanced) than with four op-amps (single-ended) - even with some variation in performance of the op-amps chosen.

 

What headphones are you planning to use?

 

Mike

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