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The Leben CS300XS Thread - Page 65

post #961 of 2090

One day I fancy trying a Leben CS300. Do the Leben's work well with Grado Headphones?

 

 

post #962 of 2090

Quote:

Originally Posted by starfish View Post

Ok, thanks.  There is not a volume imbalance with speakers but there is a difference in bass or lower frequencies.  The left has more bass with speakers and this is odd since it is the affected channel with headphones.  I have tried swapping the speakers from left to right to be sure it wasn't the speaker, and it is not.  I have also fully swapped out all the tubes and the same issues occur.  

 

The 600ohm AKGs do drive fine in the right side - the quality is very good and plenty of volume at about 9:00 on the volume pot.  It's just that the left side is probably 1/4 the volume of the right side.  I've just never seen an issue like this before.  Typically the entire cans will be reduced not just one side.  Odd issue for certain.


If you try the Balancer, would it be fine?  Mine's is louder on the left, I have to turn the Balancer 30 degree to the right.

 

post #963 of 2090

Hi.  Thanks for the feedback.  The balancer does not really fix the issue with headphones.  If I turn the balancer to 9:00 a.m. or so, then the volume is roughly equal but the gain is way down.  There is a definite problem, but I'm not too worried.  My dealer said he will just give me a brand new one when it arrives in a couple weeks.  Until then, I can enjoy it with speakers though the channel imbalance with bass occurs with speakers.  There is definitely something wrong with this amp and if I venture a guess, it might be out of spec cap or resistor somewhere in the output path.  Perhaps you have a similar issue?  I would send the amp back.  For this price, there should be no significant imbalance with volume or frequency content, IMO.

post #964 of 2090

I am wondering this question too since once I have a replacement amp I plan to get a set of phones in the $500-600 range.  I'm looking at the new Grado PS500 specifically.

 

Please, anyone feel free to recommend what they think would be the best phones in the $500-600 range with the CS300XS for rock and jazz, and some ambient, like Brian Eno and Robin Guthrie.

post #965 of 2090

I'm curious, how many degree you have to turn to get the same volume?

And if you do that? how much you have to pump up the volume pot to get the equivalent volume before you use the Balancer?  because, even when I use the balancer, yes, the gain lower, but not significant, I can leave the volume as is.

 

Btw, do you have to turn up to 90 degree angle?  I tries 90 degree just now, yes, the gain drop significantly.


Edited by RedBull - 10/1/11 at 12:33am
post #966 of 2090

One other ultimate tube combo for the Leben is Amperex Bugleboy 1950's long plate D-getter 12AX7s with Mullard 1950's EL84s. You will be amazed.

post #967 of 2090

Do I really have to turn the Leben to 8 ohm when I listen to headphone? I remember I asked someone in this thread who said the impedance switch is independent to the headphone out. I am using 4-ohm setting for my speakers - maybe that's the reason I am getting less impact on the LCD2? Let me try it out tonight.

post #968 of 2090
If you are using the headphone output, you shouldn't have to change the switch. The headphone outPut is a secondary 32 ohm winding off the output transformer. So I don't believe the switch would have any impact.
post #969 of 2090

Yesterday my Mullard 1950's EL84 have arrived. My first impression compared to the new Genalex EL84 and without burn. It's that the Mullard are very prominent in the midrange. The voices are more present are very smooth, this i like me, it's musical. But the highs and the bass are more poorer for now. Overcoat I don't listen sub bass like before. WITHOUT BURN THEM.

post #970 of 2090

Hi guys,

 

I need your help. I have an issue with my Leben. Here is my thread:

 

http://www.head-fi.org/t/575746/lebens-owners-request-what-i-found-inside-my-leben-cs-300x-limited#post_7819799

 

 

post #971 of 2090

Just to follow up don my earlier posts in this thread -

 

My replacement CS300XS is in my hands.  Night and Day!!!  The new amp sounds fine.  The headphone issue is gone as well.  I guess I just got a flawed amp the first time around.  I immediately noticed better imaging right out of the box.  The left channel imbalance on the first amp caused the perception that the brighter frequencies were coming from the right channel and therefore more volume on the right as well, with low mids and deeper bass predominantly from the left.  With the new amp, there is great imaging and even balance.  I'm really enjoying this amp and tonight will fully test it out with phones.

 

Now I'll need recommendations on good mid-tier phones for this amp.  My K240M (made in Austria) are probably under the quality level that this amp deserves.  :)

post #972 of 2090

Well that is very good news!

post #973 of 2090

Well, my Leben will be in da house this Saturday. My dealer is burning one in for me, so it will have at least 50 hours on it. It will be an interesting comparison with the Liquid Fire I also have. I'll post impressions in a week or so. I really look forward to it.

post #974 of 2090

Audeze LCD3 is your choice.

 

Quote:
Originally Posted by starfish View Post

Just to follow up don my earlier posts in this thread -

 

My replacement CS300XS is in my hands.  Night and Day!!!  The new amp sounds fine.  The headphone issue is gone as well.  I guess I just got a flawed amp the first time around.  I immediately noticed better imaging right out of the box.  The left channel imbalance on the first amp caused the perception that the brighter frequencies were coming from the right channel and therefore more volume on the right as well, with low mids and deeper bass predominantly from the left.  With the new amp, there is great imaging and even balance.  I'm really enjoying this amp and tonight will fully test it out with phones.

 

Now I'll need recommendations on good mid-tier phones for this amp.  My K240M (made in Austria) are probably under the quality level that this amp deserves.  :)



 

post #975 of 2090

what really bothers me is to choose between a LF ot a leben.

 

don't really have the luxury to audition both here. 

 

guess both are good for lcd-2 and la-7000

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