[triode12]

For what it is worth...

My brief experience with the EF1, I felt the 701s on stock EF1 (RCA cleartop) to be rather bland sounding compared to my TTVJ millett portable.

The EF1 sounded better with the HD650 in comparison as it tamed the 650s coloured bass.

 

[KevM2]

Ahh thanks for the impressions. It's always interesting how this audio game works. Some people say the 701s blow the 600s out the water with this amp, and then we have others who feel the other way around. I think I'll buy a pair just to have a reference.

 

[uberburger101]

Where's the fun if everybody agrees on everything?

 

[boomy3555]

Is the Chinese New Year over yet ? I ordered mine before and got an eamil saying it would ship after Chinese new year. My new 702's are having to burn in on my Total Airhead to get ready for my EF-1. Although I'm liking them so far even on the airhead.

 

[Youthanasia]

I know that I can/will void the warranty by changing the opamp on my Head-Direct EF1.
But my question is:
is it technically possible to install an OPA-Earth or OPA-Moon of audio-dg in this amp?
They seem to be driven by 9V - 25V...
Is it technically compatible?

 

[FrederikS|TPU]

Quote:

Originally Posted by gjergji /img/forum/go_quote.gif I know that I can/will void the warranty by changing the opamp on my Head-Direct EF1. But my question is: is it technically possible to install an OPA-Earth or OPA-Moon of audio-dg in this amp? They seem to be driven by 9V - 25V... Is it technically compatible?

I do not think there is enough space in the enclosure.

 

[Youthanasia]

Quote:

Originally Posted by FrederikS|TPU /img/forum/go_quote.gif I do not think there is enough space in the enclosure.

never mind the space, I could get the extension lead. I'm worried about the voltage. Does anyone know what voltage does the socket provide?
Any other possible problems, except space...?

 

[K3cT]

Quote:

Originally Posted by boomy3555 /img/forum/go_quote.gif Is the Chinese New Year over yet ? I ordered mine before and got an eamil saying it would ship after Chinese new year. My new 702's are having to burn in on my Total Airhead to get ready for my EF-1. Although I'm liking them so far even on the airhead.

CNY will last until 5th of February over there in mainland China.

 

[abZ]

Crap I can't read this whole thread right now. This amp is looking promising for my k702's but what about Sextett? I need one amp for both.

 

[nhat_thanh]

I just got my EF1 and... I have a problem.
I know that the amp is a imbalanced at very low volume. But my EF1 is still imbalanced when I turn the volume knob all way up.
I'm using iBasso D3 as a DAC, and connect with EF1 by mini-to-RCA cable. Now I don't know is this connection (instead of RCA-to-RCA) that cause the problem, but I doubt it. Because I have tried it with a few amps and worked fine.
Unfortunately I don't have any other source and a pair of RCA-to-RCA to test if it work fine.
Has anybody faced the same problem like me?
Thank you.

 

[ghettocoolie]

Quote:

Originally Posted by nhat_thanh /img/forum/go_quote.gif I just got my EF1 and... I have a problem. I know that the amp is a imbalanced at very low volume. But my EF1 is still imbalanced when I turn the volume knob all way up. I'm using iBasso D3 as a DAC, and connect with EF1 by mini-to-RCA cable. Now I don't know is this connection (instead of RCA-to-RCA) that cause the problem, but I doubt it. Because I have tried it with a few amps and worked fine. Unfortunately I don't have any other source and a pair of RCA-to-RCA to test if it work fine. Has anybody faced the same problem like me? Thank you.

What are you using as your source? I had the same problem when using my PC via Foobar -> Zero DAC -> EF1. I even sent it back to Fang for some testing and it turns out it was the setup on my PC. Here's a guide I used to fix it: http://www.head-fi.org/forums/f46/ea...5/#post5316393

In summary, turn the volume on your source all the way (100%) and manage your volume through your EF1.

 

[nhat_thanh]

My setup is my PC (Vista) -> iBasso D3 (use as a DAC) -> EF1.
I'm using WASAPI in the foobar.
But now it is fine, I just fix the tube position and that is it

. I fixed it twice before, so I didn't think that cause the problem.
Anyway thanks

 

[FrederikS|TPU]

Quote:

Originally Posted by triode12 /img/forum/go_quote.gif For what it is worth... My brief experience with the EF1, I felt the 701s on stock EF1 (RCA cleartop) to be rather bland sounding compared to my TTVJ millett portable. The EF1 sounded better with the HD650 in comparison as it tamed the 650s coloured bass.

You should try another tube. The RCA is a little lean sounding for the AKG K701s. If you want a warmer bassier tube try a Sylvania 12AU7, I got one in mine and it is quite a bit better with the AKG K701s.

Quote:

Originally Posted by nhat_thanh /img/forum/go_quote.gif My setup is my PC (Vista) -> iBasso D3 (use as a DAC) -> EF1. I'm using WASAPI in the foobar. But now it is fine, I just fix the tube position and that is it . I fixed it twice before, so I didn't think that cause the problem. Anyway thanks

Was going to post that you need to check the tube, but I guess you already figured that out

 

[gnostic19]

got mine last week. It shipped with an RCA tube that was half wrapped in masking tape and had a big burn spot along the top half. First amp(tube or otherwise) so no comparisons going on. Kinda want to try something else to see if i can get better sonics. Recommendations <$25-30?

I have SR-80s.

 

[theBigD]

the "burn spot" on RCA is a side getter.