[m8o]

You can always e-mail David Z. P. directly at little.tube @ gmail.com to get this resolved. I don't know with purchasing it through that re-seller whether there will be add'l cost, but that's the place to start for sure. I purchased a full set of tubes for both the LD II+ and LD III+ just to have myself.

 

[sword_yang]

Quote:

Originally Posted by systema Hi guys, Guess this is my first post. I've just received my LD II+ in mail 2 weeks ago and seems like one of the power tube is arcing as well. Every time when I turn the amp on (even when I've left it there for a day or so before I turn it on), a blue sprak/arc can be seen even without turning of the light. A loud pop can be heard from one of the channel of the headphone. Problem is, I'm at Oz and I can't find a replacement tube, and I'm stuck with a 3rd party seller (well, that's the only seller for the LD products in the ebay.com.au) that says it's perfectly normal (while in my heart, i know it's not). I guess the 4P1S is not really that an reliable tube (well, at least this batch), may be Mr. Yang should replace that with some other tubes in the next model. Anywayz, i'm stuck here with an amp that I don't dare turning on. sigh.

Sorry !
No matter where you bought this LD II+ ,
We'll send you substitute tubes as soon as possible.

 

[systema]

Quote:

Originally Posted by sword_yang Sorry ! No matter where you bought this LD II+ , We'll send you substitute tubes as soon as possible.

Thanks Mr. Yang, I really appreciate your help. I am just wondering, may be a more popular power tube model can be used in the next little dot? something that has an abundant supply in the market so that we can easily access replacements? (and extra modding opportunities of course

)

 

[m8o]

...but if so, I hope it remains a DHT tube.

 

[Dept_of_Alchemy]

This thread has been cooling down a bit lately... people need to get up from their listening chair and spend more time discussing gear!

Now that many people have had a chance to listen to their LDII+, I'm wondering is there anyone who's not happy with the amp.

 

[loisada]

To reply to the post above, I'm a headphone amp novice who has had a LD2+ for a few days now, purchased from another head-fier. I've been having alot of fun using it to drive my recently acquired RS-1s. I found the build quality remarkably good for the cost, and I'm hearing plenty of improvement in soundstage, richer mids, and less shrill highs compared to the headphone out on my receiver, which I've been making do with up to now. It's bringing my jazz, soul and reggae CDs to life -- especially live recordings, for some reason -- but the bass is a touch soupy for my taste, so I haven't enjoyed it as much playing electronica and the like. When I start to get afflicted by upgradities, which i anticipate will be soon,

that's what I'll be looking to remedy...all in all, a fun starter amp to get my feet wet with...

 

[vo328]

Quote:

Originally Posted by loisada To reply to the post above, I'm a headphone amp novice who has had a LD2+ for a few days now, purchased from another head-fier. I've been having alot of fun using it to drive my recently acquired RS-1s. I found the build quality remarkably good for the cost, and I'm hearing plenty of improvement in soundstage, richer mids, and less shrill highs compared to the headphone out on my receiver, which I've been making do with up to now. It's bringing my jazz, soul and reggae CDs to life -- especially live recordings, for some reason -- but the bass is a touch soupy for my taste, so I haven't enjoyed it as much playing electronica and the like. When I start to get afflicted by upgradities, which i anticipate will be soon, that's what I'll be looking to remedy...all in all, a fun starter amp to get my feet wet with...

loisada,

I'm still trying to figure out what "soupy" bass sounds like.

Can't say I've heard that one before and really would like to better understand that expression. Thanks!

 

[loisada]

fair question!

I realized after I posted that I was a bit slap-dash with the description. Perhaps 'loose' or 'sloppy' would be a better term -- the amp and RS1s sound great together, but on more electronic sounding music in particular the bottom end is a bit wooly and lacking in precision. From my reading, I've been wondering if this is a characteristic of the 'tube sound' in general, or whether I could expect a higher end tube amp to exhibit more tightness in that regard. As I said, I'm a novice, so it's hard to distinguish which part of my fledgling set-up is determining which aspect of the sound...

 

[pelayostyle]

F%$#! Im getting the arching now too. Its clearly visable in the day time and with the lights on. I hear the loup pop in the left side of my headphones. I emailed David already

 

[Dept_of_Alchemy]

Quote:

Originally Posted by pelayostyle F%$#! Im getting the arching now too. Its clearly visable in the day time and with the lights on. I hear the loup pop in the left side of my headphones. I emailed David already

^

How long have you had the amp?

 

[phergus_25]

Let us know how long you have had these amps that start to pop. If it is this big of a problem than maby the LD crew should send out tubes that have been tested with the new tube tester they got...

 

[vcoheda]

I have had my LDII+ for a week or two. Some but not much usage during that time. Tonight when I turned on my amp, a bright light flashed on the left power tube. I didn't have my phones on (my DT880's) so I can't say if it made a loud poping noise, although I am sure that it did. The arc was very bright and I was afraid that it had damaged my phones.

They work fine. But I was very nervous when I saw that. I emailed David, told him about the problem, and requested that he send me new tubes.

I hope this corrects the problem. But I must say, I am having second thoughts about this amp, as this "arcing" problem seems to be more than an isolated incident. The additional safety precautions -- voltage suppressor and 2x tube testing -- have not seemed to work fully. On the plus side, the customer service from David and Mr. Yang appear to be first rate, so that is comforting.

I'll keep you updated.

-------

I already got a response from David. That is quality CS. I asked him to send me new tubes and told him that I stopped using the amp because I did not want to damage my phones. Here is his response:

"We will send out the tubes immediately. Actually even with the faulty tubes, there is no way the tubes could damage your headphones at this point since all Little Dot 2+ produced in the last three weeks or so have a voltage suppression diode in the circuit."

That's good news. I feel a lot better now.

 

[pelayostyle]

Hey vcoheda,
Woudl you mind opening up your ld2+ and taking some pics of the diode that was added. I might be brave enough to install it myslef if it doesnt look too hard. Thanks

 

[GotNoRice]

I emailed David about my tube arcing incident late last week and my new tubes arrived yesterday. Great service

 

[vcoheda]

I would like to but I don't have a digital camera. Plus, I'm not even sure I would recognize the diode. A little unfamiliar in that area. But it seems that if you purchased your LDII+ in the last 3 weeks or so, the voltage suppressor should be there.