[michaelkeeney]

Ok, now in the correct thread… just got my new MUSES02 op amp installed, and really liking it.  Great clarity, noticeably improved over the stock op amp.

 

[HPiper]

What are the current best tube and opamp for the LD1+ for Grado headphones. Does any company sell them with the upgraded tube and opamp already installed?

 

[gibosi]

  What are the current best tube and opamp for the LD1+ for Grado headphones. Does any company sell them with the upgraded tube and opamp already installed?

 
Many people like the MUSES02 opamp and tall-bottle 6HM5s, To the best of my knowledge, no company sells this amp in this configuration....

 

[Frederose]

Will this amp be enough to power DT990s (250ohm) ?

 

[gibosi]

  Will this amp be enough to power DT990s (250ohm) ?

 
from the spec sheet:
 
Power Output:
150mW @ 300 ohms
300mW @ 120 ohms
800mW @ 32 ohms
 
I am using mine with 150 ohm HD700.

 

[Frederose]

Do you have to crank up the volume knob to drive your headphones reasonably ?

 

[i luvmusic 2]

I used to drived my DT770 250ohms with this LD 1+ i normally turn the volume knob 9 to 12 o'clock past 12 o'clock is too loud for me.

 

[i luvmusic 2]

For the 250 ohms Beyer's i would skipped the 1+ i would go with the MK III at least i prefered my DT770 250R with the MK III.

 

[WilliamLeonhart]

Hi I need some hellp. Is this correct for Mullards CV4010?

 

[gibosi]

 
Hi I need some hellp. Is this correct for Mullards CV4010?

 
The CV4010 is an EF95 tube, and everything looks correct to me. J1 and J2 are open and K1 and K2 are set for EF95.

 

[WilliamLeonhart]

Thanks. My LD I+ stills give rattles and buzz, and I don't know what is wrong.

 

[CJG888]

+1 on the Mk III for use with 250 ohm Beyers (I use mine with the DT250-250).

 

[gibosi]

  Thanks. My LD I+ stills give rattles and buzz, and I don't know what is wrong.

 
So you are getting rattles and buzzing with all your tubes? If so, it could be stray radio frequency signals. Nearby printers, computers, cell phones, refrigerators and so forth can all cause RF interference. Try moving your amp to another room to see if this could be the problem. Another thing to check are the internal jumpers and op amp. Make sure they are tight and seated securely. And other possible cause could be your connecting cables. Make sure the connections are tight and snug and you might want to replace all your cables.
 
If none of these measures helps, then perhaps there is something wrong with your amp. If you purchased it directly from Little Dot, contact the company. If you purchased from another vendor, you will need to contact the seller.
 
Good luck!

 

[HPiper]

I finally found the old thread on tube and opamp upgrades on their Forum. I was wondering where you get your opamps from. Is there a seller on ebay that you have had good luck with, or a website you could link for me.

 

[SolidMusic]

I finally found the old thread on tube and opamp upgrades on their Forum. I was wondering where you get your opamps from. Is there a seller on ebay that you have had good luck with, or a website you could link for me.

hi, I bought on Amazon Uk (£ 89 I think), and has bought some Russian valves to try. I am delighted.