Loxjie P20 Discussion- Starved for information on this thing!
May 27, 2021 at 3:15 PM Post #616 of 679

Arum16

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My setup exact - minus the tubes ( which are on the way in the mail, currently on stock )
How big of an upgrade did you find the 6NP3-DR tubes to be compared to stock, marginal / big improvement?

Not sure how hard Sundara is to drive compared to LCD2C, I'll pick them up the LCD2C I get the cost approved by my wife.
I never gave the stock tubes a fair chance. Meaning, did not used them for an extended period of time.
For the short period I had them installed, compared to now, the bass sounds more tight and defined, now with the 6NP3-DR (I love cellos and bass on baroque pieces).
 
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May 31, 2021 at 6:07 AM Post #617 of 679

ranchowner

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Just ordered the Monolith M1060c, and will open-back mod it.
Looking forward to how this pairs with the Loxjie P20.

Anyone tried it with this amp?
 
May 31, 2021 at 7:04 AM Post #618 of 679

ranchowner

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I just received a GE JAN 5670W tube, thought I ordered a pair... but ofcourse it was a single unit.
Luckily I managed to order another one by mistake at the same time, so guess that will drop in my mail tomorrow.

Currently running stock tubes, can I replace one of the stock tubes with the GE JAN while waiting for my second GE JAN, or do the tubes need to match?

Not sure if I got anything to win by only swapping out one of the tubes.
 
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Jun 5, 2021 at 4:39 PM Post #619 of 679

CADCAM

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I got the Foton's in and installed them in the P20 and have to say I am very happy and surprised with the results. They are both marked 1960 and look to be new. The pins on one were slightly moved I believe by the packaging but after a couple adjustments all is well. I have read that the old Foton's are expensive and rare but I took a chance and ordered two matched sets on fleabay from different sellers, received one pair and am impressed by what I am hearing.
Immediate, detailed, a somewhat forward sound compared to the 1968 Reflectors I was running. Great treble extension and solid low end. I'm listening to all sorts of music and struggling to fault them for the super low price. I fully expected to have these in for a few hours and retire them to the tube draw to sit in darkness but they are still in on day two impressing me! Not sure if I just lucked out but these are them

https://www.ebay.com/itm/402776546038?_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=20160908105057&meid=d431254f053a48f3bcd8ff6b33b49836&pid=100675&rk=1&rkt=15&sd=402776546038&itm=402776546038&pmt=0&noa=1&pg=2380057&_trksid=p2380057.c100675.m4236&_trkparms=pageci:580cf1b7-c63d-11eb-a61d-dab2ae50e105|parentrq:dde1ce2d1790a764fc12841dffe23e67|iid:1

try at your own risk as I fully expected these to not sound anything like they do...
 
Jun 6, 2021 at 4:39 AM Post #620 of 679

ranchowner

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I got the Foton's in and installed them in the P20 and have to say I am very happy and surprised with the results. They are both marked 1960 and look to be new. The pins on one were slightly moved I believe by the packaging but after a couple adjustments all is well. I have read that the old Foton's are expensive and rare but I took a chance and ordered two matched sets on fleabay from different sellers, received one pair and am impressed by what I am hearing.
Immediate, detailed, a somewhat forward sound compared to the 1968 Reflectors I was running. Great treble extension and solid low end. I'm listening to all sorts of music and struggling to fault them for the super low price. I fully expected to have these in for a few hours and retire them to the tube draw to sit in darkness but they are still in on day two impressing me! Not sure if I just lucked out but these are them

https://www.ebay.com/itm/402776546038?_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=20160908105057&meid=d431254f053a48f3bcd8ff6b33b49836&pid=100675&rk=1&rkt=15&sd=402776546038&itm=402776546038&pmt=0&noa=1&pg=2380057&_trksid=p2380057.c100675.m4236&_trkparms=pageci:580cf1b7-c63d-11eb-a61d-dab2ae50e105|parentrq:dde1ce2d1790a764fc12841dffe23e67|iid:1

try at your own risk as I fully expected these to not sound anything like they do...

Nice, might have to give them a try, just receiced 6N3P-DR tubes that were quite a step up from stock.
 
Jun 8, 2021 at 6:33 PM Post #621 of 679

CADCAM

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1960 6N3P Fotons are very forward in the mids compared to the more neutral sound sig of the 1969 Reflectors. This makes the Foton sound very good with guitar and piano, very mid focused. They do have nice bass and the highs are there but I'm listening to the Reflectors as I type and it's much more balanced throughout the whole spectrum. I really enjoy the Fotons but they are quite different and I'm hearing the bass and highs on the Reflectors and wondering if it was this detailed and present with the Foton. Options are always nice though and I will keep the Fotons in the rotation, they are brand new and I might have put 4 hrs on them so they may change a bit as they mature. The P20 is a nice little hybrid though and now that I have the Xduoo MT-602 coming in I can compare the two! My Little Dot MKIII takes the same tube as the Xduoo so I already have tons of options for it.
 
Jun 8, 2021 at 10:05 PM Post #622 of 679

dougms3

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1960 6N3P Fotons are very forward in the mids compared to the more neutral sound sig of the 1969 Reflectors. This makes the Foton sound very good with guitar and piano, very mid focused. They do have nice bass and the highs are there but I'm listening to the Reflectors as I type and it's much more balanced throughout the whole spectrum. I really enjoy the Fotons but they are quite different and I'm hearing the bass and highs on the Reflectors and wondering if it was this detailed and present with the Foton. Options are always nice though and I will keep the Fotons in the rotation, they are brand new and I might have put 4 hrs on them so they may change a bit as they mature. The P20 is a nice little hybrid though and now that I have the Xduoo MT-602 coming in I can compare the two! My Little Dot MKIII takes the same tube as the Xduoo so I already have tons of options for it.
The mt-602 would make for an interesting comparison.

Waiting to hear your thoughts.
 
Jul 25, 2021 at 1:11 PM Post #625 of 679

Arum16

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Anyone successfully replacing capacitors or opamps on the board? It is sort of something like impossible to do in this topic, but someone had uploaded a video a long time before!
I think DBaldock9 has done it. Check a few pages back on this thread.
His "customization" of the P20 starts here.
 
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Jul 25, 2021 at 1:31 PM Post #627 of 679

dougms3

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Ksorota upgraded some of the caps on my p20. It definitely yielded a improvement over stock.

I'm not sure which caps he used but he said, "Nichicon muse/fine golds or the Elna Silmic IIs, but also have used mundorf and audio note caps with good results."

2021-06-26.jpg
 
Jul 25, 2021 at 2:23 PM Post #628 of 679

jonathan c

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Another stellar job by CAPtain Ksorota !!
 
Jul 25, 2021 at 2:40 PM Post #629 of 679

DBaldock9

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Anyone successfully replacing capacitors or opamps on the board? It is sort of something like impossible to do in this topic, but someone had uploaded a video a long time before!

Note: The op-amp +18V & -18V supply rails are set by the custom transformer in the DC-to-DC converter, and not by IC Voltage Regulators - so make sure your replacement op-amps are rated for at least 36V.
.
Otherwise, you'll need to isolate all of the op-amp supply pins, add additional lower voltage regulators, and hardwire them to the op-amps.
 
Jul 25, 2021 at 4:13 PM Post #630 of 679

Researcher

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Note: The op-amp +18V & -18V supply rails are set by the custom transformer in the DC-to-DC converter, and not by IC Voltage Regulators - so make sure your replacement op-amps are rated for at least 36V.
.
Otherwise, you'll need to isolate all of the op-amp supply pins, add additional lower voltage regulators, and hardwire them to the op-amps.

P20 uses NJR55320 whose Operating Voltage is up to +-20V (not more). Someone from another platform suggests any opamp more than 18V for a safety step. This is said to be cause Loxjie P20 has a few of variants. Depending the design, I suspect the supply rails changes (not sure at all!) BTW, The guy (on that video) uses OPA2134Pa (+-18V), please click that as I revised the link of the video.

I read somewhere a user claims to have placed 4 of SS3602 on the board. As result, He adds An oscillation happens. Is there anyone here who tried to use 4 of SS3602? Or any suggestion for the brand of opamp to roll?
 

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