Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › The Leben CS300XS Thread
New Posts  All Forums:Forum Nav:

The Leben CS300XS Thread - Page 138

post #2056 of 2066
My leben cs 300 is the Japan 100 v version with voltage step down. So it probably put out less power than the cs300 sx. My listening room is only 11'x 25' with acoustic treatment. Most of the time the volume dial is at 10 to 11 o'clock position for proper loundness. I bought the 1.7 because I wanted the sound of the LCD2 in a scaled up version of speakers. The combination of 1.7 and leben is fantastic. The clarity, definition and liquidity is addicting. The low end extension and resolution is excellent. Never feel a need for sub. I think a 20'x 30' room would be ideal for this set up but here in Honolulu the realestate space come a premium.
post #2057 of 2066
Very cool! I'm sure that sounds great.
post #2058 of 2066

I have used prima prologue one amp(el34 tube) driving the 1.7 with good result but the Leben has better low end definition and overall transparency compared to the prima prologue amp. The prima has more power and head room on spec but the leben has better sound quality watt for watt. I also preferred the tone of the Leben probably due to the difference between el 34 and el 84.

post #2059 of 2066

IMG_20140316_164425[1].jpg

post #2060 of 2066

My Leben hums with very sensitive speakers that amplify the bass so that the hum is exaggerated.

Is there anyone out there who has heard a hum through speakers that finds it not there with LCD3s?

In other words, would I be better off buying LCD3 headphones for the amp, or selling it and buying a different amplifier (say the Jadis I35) and listen over my speakers still (assuming the Jadis won't humm too).

 

Mark

post #2061 of 2066
Quote:
Originally Posted by zoroastra View Post
 

My Leben hums with very sensitive speakers that amplify the bass so that the hum is exaggerated.

Is there anyone out there who has heard a hum through speakers that finds it not there with LCD3s?

In other words, would I be better off buying LCD3 headphones for the amp, or selling it and buying a different amplifier (say the Jadis I35) and listen over my speakers still (assuming the Jadis won't humm too).

 

Mark

 

My impression is that the hum varies - may be due to local AC conditions. 

 

However, it seems that is prone to humming with high impedance headphones. Haven't tried many speakers, but y unit didn't have a noticable  hum with the Klipsch RF82 (98dB) http://www.klipsch.com/rf-82-ii-floorstanding-speaker - which was a great pairing, I must add - abolutely reccomended as a budget speaker option for the Leben. 

 

However - with very sensitive speakers (>100), most amps will have a hiss or a hum. It is also relevant what impedance your speakers are - maybe you should try some with loer impedance?

post #2062 of 2066
When I had the CS300, I got slight hum/noise from my 91dB speakers as well as from LCD-2 (headphone output). I think the hum/noise may be caused by "dirty power" from the wall outlet, but I had hum/noise even when using a power conditioner.

If the hum is 50-60Hz it's from the amps main trafo, but if it's 100-120Hz it can allegedly be fixed by mounting a choke as earlier described in this thread.
post #2063 of 2066

Hello

Other than purchasing one used, is there a US distributor? 

thanks

post #2064 of 2066
The Lebel website still lists the US Distributor as Tone Imports 646-425-7800 jhalpern@mac.com

I found them a bit difficult to deal with since they wouldn't sell me one directly even though the closest dealer to me was 7 hours away in Cleveland. So I bought mine used.
post #2065 of 2066
Quote:
Originally Posted by Skylab View Post

The Lebel website still lists the US Distributor as Tone Imports 646-425-7800 jhalpern@mac.com

I found them a bit difficult to deal with since they wouldn't sell me one directly even though the closest dealer to me was 7 hours away in Cleveland. So I bought mine used.

 

Thanks for the information. It sounds like a wonderful amp. However, for 3k I don't want to deal with the hum issue. For that price, I want all the phones I own to work hum-free.

post #2066 of 2066

Anecdotally but I read a critical opinion about the 300 XS on stereo.net.au

 

The reviewer and an audiophile friend of his were seriously underwhelmed by its sound, even after rolling tubes etc.  Then they put a pre-amp between the CD-transport and the Leben that brought down the output (2V I assume) of the CD to closer to the unit's specified 600 mV sensitivity and things cleared up dramatically.

 

See here:  http://www.stereo.net.au/forums/index.php?/topic/48804-leben-cs300xs-a-dissenting-opinion/

 

No idea if this is somehow related to the hum issue which I'd instinctively chalk down to either the power supply or the transformer but perhaps someone more knowledgeable can chime in.  But I agree that for the price the sound should be hum-free and pretty darn good.

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › The Leben CS300XS Thread