Am not familiar with the new format in head fi now... I assume this post is for me? In Audio Asylum and some other hifi forums there are lots of experts that I learnt a lot from. I think I hv spent 5 years reading and asking questions to the experts on different fields. I love electronics...

Wow look like new to me, as if it was just made yesterday! I have opened up a few amps to restored and modified, except just to admired without working on it.. as they are a piece of history! The last one I struggled but not succeeded was a pilot el 84 pp power amp. I hv no reservation in...

Fisher has a very warm nice sound, one of the top brand in the 60s and 70s. I followed some of the discussion in Audio Asylum years ago, some of the old timers said Fishers original dedigners were German engineer that knows the tubes very well. Those engineers perhsps were with Siemens or...

I used to like receivers, and still keep a few, but didn't use them for a long time due to lack of space. I like my Mac 1700 and 1900. The 1700 has a tube fm I think, with nice warm sound. 1900 is all solid state. Both hv not been used for at least 15 years. I hv Fisher 400 tube receiver too...

Haha... well hifi is for fun and tweaking. I think M40X sounds better then M50X. But in the original form with 3 meters of cables, 40x sounded boring to me. I was using it when my 70X broke. Replacing the cable with the 70X's make 40x more open and dynamics. So I opened up 40x, trying to replace...

M70X is very good but not the best, may be I sud qualify what I meant, by defining it as the best over all, a headphone that is easy to drive, flat and accurate sounding, very dynamic, and cud be easily use every where and any time. It sounds much better then R70x, which require a cable change...

Recently I have repaired my broken M70x, by moving the ear speaker driver boxs to the M40x head bridge. M40X head bridge cud fix the M70x driver boxes perfectly. I hv cut the wiring shorter too, and resolder closer to the voice coil wires points. The bass improved as a result by quite a lot...

I still love my Mac 2600 after about 25 years. Still hv like new Mac 1700 and 1900. Very nice FM in very late nite. Too bad not space for my Mac XRT 18, modified with directly solder siltec 56 pure silver cable...

The bass is a bit on the light side, for most amplifiers. It is very clear and accurate, best mid range to my friend who own recording studio. But with a properly designed amp, the bass is v powerful. Be careful it broke the join between the ear speaker housing to the bridge quite easily. I...

Audio technical ATH R70X driver unit... So simple and very balance sound

My fav is Audio Technica ath m70x. But the plastic peace that join the head bridge will break in a year time. I have 2 broken in 2 years. Now my third m70x. Adding resin glue in the plastic peace before it break. Hope I can use it for 3 yrs

I dont think I hv tried hard enough to compare 1612 and 1602. They sound very similar. May be 1602 a bit thicker, while 1612 is slightly sweeter. I have some 1622 but have yet use them, as they are teally small vson side. Its without pins out just like the modern day handphones' chips, with the...

I don't know if you are using X3. I am also not sure about Xduoo's cost allocation rationale. According to their tech, they put the buffer there to make the sound warmer. Anyway, for me it sounded nicer driving direct from 1612. I am just writing here about my experience, to whoever might be...

I have sent you a mail for my explaination... in short, please take a look at TI web site on opa 1622, the op amp they design just for headphones, there are ample explaination about the current needed to drive headphones..but most headphones are quite easy to drive with just 1612. Last night I...

I guess you have to try it out for yourself first. Your ohm's law sud be using the output voltage rather that the ps'. Any way, if you are handy, you cud do some measurements first before making the assumption.. i wud not say things I have not done before. I hv been working on a few x2 and x3...

I mainly use audio technica ath m70x, which is about 35 ohm. Those in the ear type with 16 ohms are easy to drive. Opa 1612 can put out 50ma. I can drive my m70x to loud enough that will destroy my ear. At X3 gain level, 1612 can handle with no problem. I removed the LMH op amp. Then connect the...

Well LMH is a cheap op amp.all my headphones are low impedence type. 1612 is never out of juice, at least at those gain level. You couldnchange to 1602 too, which has 50% more deive current

The output section has a LMH op am which has an 100 ma output current capability. But from the dac, the signal goes thru an OP1612 low pass filter, then another Opa 1612, then used the LMH as an output buffer. I took out the last op amp, the LMH type, the sound became greatly more transparent

X3 actually used quite a decent parts. Mine became very hot after charging, then I traced the problem to a TI TPS 63000 regulator, which provide v+ and feed the LM 2662 negative voltage generator. I have no idea why it became hot so fast, but I will replace them to see how it will work. I might...

Tks nemathesis and paws. Mouser sud be quite expensive, especially the mailing cost. I used to buy from the US too, once for a small box of Atom and other capacitors the mailing cost was 100 usd. Shen zhen is a lot cheaper. I dont usually go to fb. Will take a look then... Sorry to combine my...

Thank you nmatheis, just nice to see the local production of a mini player! Where in Jkt that people meet to listen or discuss hifi? Where do you get op amp and Dale in Jkt? I have to buy from Shen Zhen, but got some nice Nichicon from the doctor in jkt also

After charging my X3 today, the player became hot. Any body have such problem? It happen 2 days ago but after turning it off for a while it became ok. But this time its really hot. I opened the box and found that one of the chip, suspect a small square regulator is burning hot...

I just join head fi now. Just read this thread as of now. Happy to see an Indonesian produced portable player. I have not read all the 15 pages yet, can some one tell me in summary any user experience and whatbis the selling price? Am from Jakarta but live in Singapore now, have been in love...