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Review of the Little-Dot MK1 Portable Headphone Amplifier - Page 3

post #31 of 264
1/19/08 at 6:24pm
Thread Starter 
Quote:
Originally Posted by Zephyron View Post
I'll wait till Chinese New Year till when I get to collect my Ang Bao money.

Hopefully it'll allow me to purchase the MK1 from David in eBay.

The last one sold for US$119 + $25 shipped to Canada.

I have my doubts about using the AD8397 though. I works in the PINT a friend of mine build, but that op-amp is considered by quite a number to be a finicky one.
Sounds like a plan! You can always order the LT Opamps too. Here is a link to their site: Linear Technology - Linear Home Page

When my order for Opamps comes in, I'm also going to try the LT1469 in the MK1. It is just hard to imagine the MK1 sounding any better!
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post #32 of 264
1/19/08 at 7:23pm
Wow, thanks for the info

Learnt something new again.
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post #33 of 264
1/20/08 at 3:11am
Thread Starter 
Quote:
Originally Posted by Zephyron View Post
Wow, thanks for the info

Learnt something new again.
I was going to show you a table of Opamps we have been testing in the Zero DAC/Amp. If you look here: http://www.head-fi.org/forums/f5/rev...re-amp-269458/ and scroll to the end of the review, you'll see the table. The ones rating "great" will generally work "great" in other like applications too. I just thought you might be interested. It's good info.
See ya!
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post #34 of 264
1/20/08 at 4:01am
Thanks, that was an interesting read =3

I'd probably stick with the default LM4562 in the MK1 though. Withh my current limited gear, I probably won't need the extra warmth since the 1HA-EPC can take care of that

Can't wait though, the spec sheets of the MK1 already look very impressive, much so I'm kinda hyped up thinking about it X3
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post #35 of 264
1/20/08 at 4:14am
Thread Starter 
Quote:
Originally Posted by Zephyron View Post
Thanks, that was an interesting read =3

I'd probably stick with the default LM4562 in the MK1 though. Withh my current limited gear, I probably won't need the extra warmth since the 1HA-EPC can take care of that

Can't wait though, the spec sheets of the MK1 already look very impressive, much so I'm kinda hyped up thinking about it X3
I hear ya! For no more than it costs, and how nice it looks and how excellent it performs, it is sure to be a keeper. It just isn't well known yet.
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post #36 of 264
1/20/08 at 11:49am
I will be awaiting for my MK 1 to arrive and try out before changing to LT1364 what was the last info ? is it socket on or need to resolder ?
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post #37 of 264
1/20/08 at 11:58am
Thread Starter 
Quote:
Originally Posted by pcyl View Post
I will be awaiting for my MK 1 to arrive and try out before changing to LT1364 what was the last info ? is it socket on or need to resolder ?
Socket!!! Yaaaaaaaa!!!!
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post #38 of 264
1/20/08 at 5:29pm
Quote:
Originally Posted by Normality View Post
Nevertheless, the Xenos has better power supply (delivering +/-12V regulated internally) and output buffer (discrete, not integrated) circuitry. It's just a bit of a pity that a pair of SMD OPA2134's were chosen - not the most transparent around. I have changed them for LME49720 (input stage) and LT1364 (output buffer driver stage) and now it's simply fantastic.
Thanks again for the extra piece of info, I'll definitely look into this

The problem I have with the 1HA-EPC is that its gargantuan in size, so am looking for smaller stuffs that offer flexibility and whatnot. From what I see here, the MK1s seem to fit the bill, and it looks nice to boot =3
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post #39 of 264
1/20/08 at 11:40pm
Quote:
Originally Posted by Penchum View Post
This morning, after working on one of the DACs, I realized I had an extra LT1364 Opamp. So, I took my MK1 apart and swapped out the LM4562 for the LT1364. What a major improvement! The over-brightness was gone, the music was warmer, full spectrum and lacking nothing! It drove my HD-650s with ease. Now, the MK1 is far less fatiguing and still powerful!

I highly recommend this Opamp change. Every nuance you would expect from the music is far more apparent and the fact that it is easier on the ears makes this a perfect low/no cost improvement.
Hi, just wanted to say thanks for the great info! I think this mod is pure genius and I'd love to do the same myself, I just had one question about the swap, I was on Linear Tech's website and I noticed they had different model numbers for the LT1364 I wasn't sure which version of the LT1364 would be the best one for the swap, which Opamp model would you recomend for this mod?

LT1364CN8#PBF
LT1364CS8
LT1364CS8#PBF
LT1364CS8#TR
LT1364CS8#TRPBF

source:
Linear Technology - LT1364 - Dual and Quad 70MHz, 1000V/µs Op Amps LT1364 LT1364CS8#TR LT1364CN8#PBF LT1364CS8 LT1364CS8#TRPBF LT1364CS8#PBF
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post #40 of 264
1/20/08 at 11:46pm
Thread Starter 
Quote:
Originally Posted by Apocalypse777 View Post
Hi, just wanted to say thanks for the great info! I think this mod is pure genius and I'd love to do the same myself, I just had one question about the swap, I was on Linear Tech's website and I noticed they had different model numbers for the LT1364 I wasn't sure which version of the LT1364 would be the best one for the swap, which Opamp model would you recomend for this mod?

LT1364CN8#PBF
LT1364CS8
LT1364CS8#PBF
LT1364CS8#TR
LT1364CS8#TRPBF

source:
Linear Technology - LT1364 - Dual and Quad 70MHz, 1000V/µs Op Amps LT1364 LT1364CS8#TR LT1364CN8#PBF LT1364CS8 LT1364CS8#TRPBF LT1364CS8#PBF
The first one on your list, the LT1364CN8#PBF.
Have a good one!
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post #41 of 264
1/20/08 at 11:51pm
Wow that was a fast reply! Thanks, I'll order it tonight, Penchum your the best!
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post #42 of 264
1/21/08 at 10:41am

will try out

i will try out the orginal before doing Swap
as i just receive only 3 day from the day i sent my order to Mr Zhang
extreamly fast respond

will catch up with you guys
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post #43 of 264
1/21/08 at 11:42am

Thanks you

Quote:
Originally Posted by Penchum View Post
Socket!!! Yaaaaaaaa!!!!
will get it try out soon before changing to LT1469
thanks for info guys
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post #44 of 264
1/22/08 at 6:17am
I'm interested in this little amp to use with my Ipod classic and HD600 as
main amp.

For the guys who are not so familiar with changing stuff in an amp, how does a change work in detail?

Do I have to solder????
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post #45 of 264
1/22/08 at 7:08am
Quote:
Originally Posted by Gomoo View Post
For the guys who are not so familiar with changing stuff in an amp, how does a change work in detail?
Nope. The op-amp in the LDM MK1 is socketed.

For example, have a look at this PCI Card. It has an OPA2134 op-amp mounted on one of the above mentioned sockets.


If you see carefully, you can see that the op-amps are mounted on these 'sockets':


This means you are free to remove and replace the op-amp at will, provided that you have the spare, and correct, op-amps intended for use in the amplifier.
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