Good review, I also like Z5.

Dear Mochan， Thank you raised these issues. LD Q is a new product, the original design does not include USB DAC, just as the last to join this function. Because many people look forward to as soon as possible LD Q, we do not have enough time to improve. For the present these products, if you...

Quote: Originally Posted by Neeley My friend is a qualified electronics service engineer who also specialises in vintage audio and television, not just a mate poking and hoping. That's why I had him look at it first. At the time, frustration, impatience got the better of me, it seemed...

Quote: Originally Posted by AcousticDreams I'm sorry if I must tell to you that, but a soldered connection or whatever that can be knocked loose so easily is a strong sign of poor processing and shoddy quality control. Such a thing should not happen simply, even not after a...

Quote: Originally Posted by Bowedtoothdoc After fully testing the MKVII+ with a different source the unit appears to be working properly with both balanced and single ended inputs. The problem appears to be the balanced outputs on my LD DAC I which I have not had the opportunity to use...

Quote: Originally Posted by Adda I would think so yes, never heard a Prelude though. When going through the CUBE, I don't use the CUBE's DAC, it's all digital, I just use the USB capability of the CUBE to get more samplerates. The USB input on the DAC_I only supports 44.1KHz, while...

Quote: Originally Posted by Xcalibur255 The hard power switch on the back was visible in the prototype too. What I was wondering is why there is no soft power button on the front. That seems terribly inconvenient if the unit is placed in a location where you cannot easily reach to the...

MK 6 of the fans, will use low-noise fans, noise only 18dBA. Viewing a thread - NEW! Little Dot MARK VI balance tube Amp.

If conditions change, we can provide 100-ohm resistors, if no conditions, please contact with our dealers.

The fan speed control resistance to change from 75 ohm to 100 ohm, fan noise can be significantly decreased, the follow-up of products has improved.

Tomorrow is the traditional Chinese New Year - the Rat Year, I wish all friend Happy New Year!

Quote: Originally Posted by fran Sword-yang, what about the other way around - can a 6H30 be used in the MKIII? Fran This more difficult: the need PCB board of the cathode 68 ohm resistance to change is 120 ohm.

---Yes, 6H6PI(6N6PI) and ECC99 can be used in LD MK IV.

Quote: Originally Posted by dollar99 Cool, they just pop right off. So I switched the driver tubes around, and now the hum is in the right channel. So now the question is, what type of tubes should I replace them with? Should I also replace the power tubes? No replacement the...

Quote: Originally Posted by dollar99 Whatever I do, I cannot seem to get rid of the hum coming from the left channel. Here is what I've tried -Ground loop isolator between the source -2 prong adapter -Unplugging the source still gives me the hum so its not source related...

Hi feifan, Please PM your address, telephone number, I will send the LD II ++ the tubes to you, all free of charge.

Quote: Originally Posted by Skylab My LD2+ was noisy. The tubes were microphonic, and the amp hummed unacceptably. I had to sell it at a loss to someone who was going to mod it. Has any question please to supply goods with you business relation, we can very quickly solve for you.

Quote: Originally Posted by penguindude I received mine today, opened it, plugged the tubes in, ready to listen and do a review, then BAM, i could not hear any sound. Actually, i could, but it was so tiny that i can barely detect it. I do not know what's wrong it, im guessing the...

About front tubes flash: First this cannot have any sound impact, next, if has the quality question we to be possible to guarantee in for 2 years the free replacement.

Dear customers, We're really sorry for the inconvenience our prodocts have brought .In order to make better use of your LD ,we offer you two ways of upgrade : 1.pay another 60USD of price difference and send your old LDII+ back (customers pay the carriage),then we will send you a new LDII++(we...

Dear David S. Cohen: I'm sorry that I saw your letter so late.(If you have sent it to my email:swco@163.com or szdsplab@sina.com,I could have seen it earlier.) As we all know ,LD II&LD III have been producing for more than 1 year ,which have the same power tube as LD II+ has :4P1S. We will...

Hey guys, we've received a lot of questions regarding the 4P1S power tubes used in our Little Dot tube amplifiers in the past few weeks, most of which point us back here to the Head-Fi forums. We definitely recognize the issue and we have taken some steps to remedy the current tube situation...

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...

Pataburd, Sorry my product give you so trouble! I will fulfil your all request, as soon as possible send back your money by paypal. Sorry again ! Yang. and thanks m8o invaluableners advice very much! I will ameliorate it future.

The popping noise is actually the capacitors charging up and is completely normal. The only thing that needs to be addressed is if the 4P1S tubes produces "sparks" within vacuum tube itself. This should be easily seen with the lights off. If there are no sparks, and/or you've already used the...