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post #10036 of 19256
Is there an opamp that people recommend for the LD I+?
I saw something somewhere about the OPA2107?
post #10037 of 19256
Quote:
Originally Posted by SJWorne View Post

Is there an opamp that people recommend for the LD I+?
I saw something somewhere about the OPA2107?

The OPA2107  was my opamp of choice when I was using the LD1+

post #10038 of 19256
Quote:
Originally Posted by SJWorne View Post

Is there an opamp that people recommend for the LD I+?
I saw something somewhere about the OPA2107?

I also just changed to the Burr Brown OPA2107, and I found it to be a bit clearer and detailed than the stock op-amp that came with the LD1+. I personally like it very much!

post #10039 of 19256

During my bout of insomnia early on Sunday morning, I placed an order for the Burr-Brown 2107 as well as the 2111.  Hoepfully, I'll get these this week.  But, I do have to say, even with the stock op-amp, my latest tubes, the Voshkod 6ZH1P-EV (about $40 shipped for a new pair from YenAudioStore), I'll have to say that the sound is just sweet to my ears.

 

Fortunately, the op-amps are somewhat cheap to try and see how things sound.  Getting the OPA627 from Burr-Brown is supposed to be a great op-amp too.  However, you'll need two op-amp chips and a Brown Dog adapter.  But, there's a big risk of getting some counterfeit chips too as many from China are just that - fake.  Instead, buying from DigiKey, Mouser, etc. might be a better alternative on the 627, though I havne't read too much on that chip with the Little Dot.  Finally, some people have sourced the OPA-627 from some older audio receivers before tossing them.  If manufacturers such as Yamaha and their older audio/video receivers used the chips, you could get a pair that they used for each channel.  I think the 627 has been around a long time (15+ years?) due to the popularity.

post #10040 of 19256

well, just ordered a set of heptodes for the little dot that shipped this morning

i got these

 
  • $%28KGrHqR,%21mIFJHuh%29YgnBSZT%29BKu6Q%7E%7E60_14.JPG

TELEFUNKEN EH900S 5915 EH960

 

they cost a little more, about half of the price of the little dot

i never did roll op amps when i had the little dot before, but i'm going to try some this time around


Edited by jaywillin - 10/21/13 at 9:35am
post #10041 of 19256
Quote:
Originally Posted by wje View Post
 

During my bout of insomnia early on Sunday morning, I placed an order for the Burr-Brown 2107 as well as the 2111.  Hoepfully, I'll get these this week.  But, I do have to say, even with the stock op-amp, my latest tubes, the Voshkod 6ZH1P-EV (about $40 shipped for a new pair from YenAudioStore), I'll have to say that the sound is just sweet to my ears.

 

Fortunately, the op-amps are somewhat cheap to try and see how things sound.  Getting the OPA627 from Burr-Brown is supposed to be a great op-amp too.  However, you'll need two op-amp chips and a Brown Dog adapter.  But, there's a big risk of getting some counterfeit chips too as many from China are just that - fake.  Instead, buying from DigiKey, Mouser, etc. might be a better alternative on the 627, though I havne't read too much on that chip with the Little Dot.  Finally, some people have sourced the OPA-627 from some older audio receivers before tossing them.  If manufacturers such as Yamaha and their older audio/video receivers used the chips, you could get a pair that they used for each channel.  I think the 627 has been around a long time (15+ years?) due to the popularity.

Voshkod's rule. 

post #10042 of 19256

and the OPA2107 is great too. interesting to see how these sentiments haven't changed on  the board, seeing as I upgraded my op amp and my tubes over a year ago. 

post #10043 of 19256
Quote:
Originally Posted by Melvins View Post
 

and the OPA2107 is great too. interesting to see how these sentiments haven't changed on  the board, seeing as I upgraded my op amp and my tubes over a year ago.

 

I think most of us are cautious as many members have invested heavily into the other options for testing purposes and then posted the results to indicate that some model numbers / brands were not as good as others.  It's always easier to "go with what you know" vs. not doing so ... which can cost you more $$.

post #10044 of 19256

Thanks again for all the info :)

post #10045 of 19256

Once you get all these upgrades to the LD1+ you need to let the rest of us know if this is the 'go-to' amp for Grado's. I could have bet that you could, at one time, order the LD1+ with both the upgraded tubes and the op-amp, but when I looked last night it appears you can get it with the good tubes but no op-amp options are showing now. Ah well the op-amps are super easy to replace and cheap so not a big deal. Mainly want to know if this amp sounds better than the MkIII with Grado's. Be even better if someone could do a before and after mods comparison. If not to the MkIII then maybe to another good amp like the Lyr for example.

post #10046 of 19256
Quote:
Originally Posted by HPiper View Post
 

Once you get all these upgrades to the LD1+ you need to let the rest of us know if this is the 'go-to' amp for Grado's. I could have bet that you could, at one time, order the LD1+ with both the upgraded tubes and the op-amp, but when I looked last night it appears you can get it with the good tubes but no op-amp options are showing now. Ah well the op-amps are super easy to replace and cheap so not a big deal. Mainly want to know if this amp sounds better than the MkIII with Grado's. Be even better if someone could do a before and after mods comparison. If not to the MkIII then maybe to another good amp like the Lyr for example.

 

I think since the LD I+ and the LD MK III sell for about $100 and $160, respectively, it's kind of a mismatch when comparing them to the Lyr, as the cost for that amp is $449.00.  To my ears, the LD I+ is quite impressive, and has very few shortcomings for what is provided.  It's an excellent performer.  While Grado Schiit will be offering their $129 tube amp shortly, many of us Grado owners will not be able to adopt to that device as it appears to not do as well with low impedence headphones and the amp with the tubes can exhibit some effects of microphonics. The amp might be a better match for other headphones - 80Ohm, 250Ohm, etc.


Edited by wje - 10/22/13 at 3:17am
post #10047 of 19256
Quote:
Originally Posted by HPiper View Post
 

Once you get all these upgrades to the LD1+ you need to let the rest of us know if this is the 'go-to' amp for Grado's. I could have bet that you could, at one time, order the LD1+ with both the upgraded tubes and the op-amp, but when I looked last night it appears you can get it with the good tubes but no op-amp options are showing now. Ah well the op-amps are super easy to replace and cheap so not a big deal. Mainly want to know if this amp sounds better than the MkIII with Grado's. Be even better if someone could do a before and after mods comparison. If not to the MkIII then maybe to another good amp like the Lyr for example.

 

The OPA2107 op-amp is free from Texas Instruments.  All you have to do is request a sample on their website. :)

 

The specs make it pretty clear that the Mk III or IV (OTL amps) will not perform nearly as well with Grados as the I+ (hybrid amp).  But I haven't heard them, so I can't say they will sound bad

post #10048 of 19256
Quote:
Originally Posted by wje View Post
 

 

I think since the LD I+ and the LD MK III sell for about $100 and $160, respectively, it's kind of a mismatch when comparing them to the Lyr, as the cost for that amp is $449.00.  To my ears, the LD I+ is quite impressive, and has very few shortcomings for what is provided.  It's an excellent performer.  While Grado will be offering their $129 tube amp shortly, many of us Grado owners will not be able to adopt to that device as it appears to not do as well with low impedence headphones and the amp with the tubes can exhibit some effects of microphonics. The amp might be a better match for other headphones - 80Ohm, 250Ohm, etc.

The LD 1+ really opened up once you get into some non standard tubes... the 6HM5 and 6DT6A are very interesting tubes to explore and are are far better then the "upgraded" ones... and now over in the LD tube rolling thread we've been working on adapting 9 pin tubes... its crazy the amount of innovation and variety of choice offered in that thread.

post #10049 of 19256
Wait...Grado is going to offer a tube amp?
post #10050 of 19256
No, schiit is about to offer a small tube amp aimed at high impedance cans
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