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Little Dot Micro Tube in the House! - Page 2

post #16 of 57
12/23/06 at 12:13am
The top end will change and the amp will make many changes. I have found it sounds good with IEM's.
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post #17 of 57
12/23/06 at 12:50am
Wow nice... typically the largest and most expensive components in a tube amp are the power transformer, output transformers (if its a non-OTL design), rectifier tube and power tubes. I'm guessing theres a high-ish current step down transformer, some filtering caps, fuse and rectifier circuit inside that P/S.
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post #18 of 57
12/23/06 at 1:19am
It has a stepdown transformer that then is rectified and filtered and supplies the tube, buffers, opamp and filament. Unless the volume is turned to max, I hear no hum so for all intents and purpose, the amp is very quiet, at least the one I have. The power supply is nice and compact and well laid out. I like the use of the umbilical, which is a good reason the amp is quiet. The power supply housing is well ventilated and solid. Quite a surprise for the price and frankly you are getting an amp that could sell for much more.
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post #19 of 57
12/23/06 at 12:54pm
Miguel- If anyone calls you an amp whore...

...believe them!


It's cool, actually, and I envy you in that regard.
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post #20 of 57
12/23/06 at 1:11pm
Thread Starter 
Quote:
Originally Posted by Voodoochile View Post
Miguel- If anyone calls you an amp whore...

...believe them!


It's cool, actually, and I envy you in that regard.
I admit it, and by the way I like that amp whore! it does have a ring to it.

BTW at the 60 hour mark the bass has mellowed out and the highs have become less recessed. The sound is still balance with no frequency beign in front of another. Nice amp!
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post #21 of 57
1/4/07 at 10:09am
I was hoping for a full review after the burn in period. Miguel have you had a chance to listen to the LD Micro tube after the burn in period.
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post #22 of 57
1/4/07 at 11:48am
jamoto (i think that's his name) has written alot of his progressive listening with the little dot tube micro. you just have to find that thread. =T
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post #23 of 57
1/4/07 at 2:11pm
Thread Starter 
Quote:
Originally Posted by johntraveler View Post
I was hoping for a full review after the burn in period. Miguel have you had a chance to listen to the LD Micro tube after the burn in period.
I left on a two week vacation, that is holding back the review. I should be back around the 15th and the amp had about 210 hours of burn in so when I get back I will give it another 3 days or so. Thus my impressions would be in around the 21 of Jan. Sorry.
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post #24 of 57
1/4/07 at 9:32pm
I look forward to your review later in January.
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post #25 of 57
1/5/07 at 3:27pm
Thread Starter 
Quote:
Originally Posted by johntraveler View Post
I look forward to your review later in January.
Jamato8 has an unit and wrote a report, he likes it a lot specially the value of this amp which retails for $200
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post #26 of 57
1/5/07 at 6:21pm
I know but it is also good to hear more than one persons point of view. I know both of you have a good deal of experience with various amps. I just received mine 2 nights ago and only have about 20 hours burn in time. I do not have your extensive background with headphone amps, but I have been very pleased in what I am hearing so far for an amp at this price.
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post #27 of 57
1/5/07 at 8:43pm
I just recieved my LD MT a few days ago. It is still under burning in phase. however, i think its sound is not as good as my expectation. the sound is not very clear and somewhat has some background echo. I am afraid of that the high temperature inside the chassis will reduce the performance of the electronic components even cause some problems. My headphone is MS1 which has 30 OHM impedance and audio source is iriver mp550. i haven't heard any other amps yet. so i don't know what others sound like. in my case, the sound quality didn't improve too much after using amp. I hope the LD MT will get some positive changes after burning in. looking forward....
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post #28 of 57
1/13/07 at 1:57am
Thread Starter 
A little later than I wanted but here it is. I will probably add aditional notes over the next two days to amplify on what I wrote. Hope it helps.

The amp and power supply come very well packed, the shipping is about 4 to 5 days. It is my opinion that this amp benefits significantly from extensive burn in, I would conservately say at least 300 hours. Of course things may vary and only you the end user will be able to determine the point at which you feel no additional changes will occur. Mine is at the 350 hour mark and I feel any additional change will be subtle if any.

Bass: This was a big surprise! it is hard to believe such an small unit can produce such a powerful, tight, and well defined bass. As I said earlier give the amp at least the 300 hour of burn in to allow its bass to settle and you will be rewarded with one tight sounding unit.

Mids: The sound is detailed, clear, and female voices come thru very well. Nora Jones and Diana Krall sound fantastic.

Highs: Very balanced and fast without any shrillness.

Overall: I will say the best two words to describe the sound is transparent and balanced. I mean the amp does not seem to add nor substract from whatever you use as a source and it does not emphasize a particular sectopm of the frequency response.

Power: I listen at very low volumes, for me this amp has more power than I will ever use. It drives my K701, K501, Beyer 2005 DT990 (250 ohm), and Grado RS-1 with out any problem. I did test and I found the amp starts to clip at about 2:00pm.

Value: There is no doubt in my mind this is an excellent value, as I understand it the unit sells for around $200 dollars and I do not know of any new amp in this price range that come close. Yes amps costing twice will sound better and so should they but if you get this little gem you will be very satisfied.
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post #29 of 57
1/13/07 at 2:06am
I would have to agree with all your remarks. I find that at about 450 hours or a little more the sound still changes. It becomes more and more detailed, no leaps and bonds but better and not worse, and the bass totally integrates with the intire frequency range. I also like what I see inside of the amp with both the power supply and main board. It isn't of questionable quality as I have seen with some electronics here, to me it is first rate.

I am anxious to try the 6111 tubes I have back in the states but that will take a little time. I even listen to mine with ear buds and some IEM's though the UM2's are too sensitive and you pick up too much tube noise with them.
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post #30 of 57
1/14/07 at 1:05pm
This amp has LM4562 opamps. How important are these for the sound?
I know it can make quite a difference when changing opamps on a soundcard.
Is it the same with (tube) amps? I've read reports about LM4562 being 'artificially spatious'.

I adore my OPA2107 opamps. Can I change LM4562s on a LD Micro Tube with mine if I want to? That would mean moving them from my soundcard to the amp.
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