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LOXJIE P20 Full Balance Tube Amplifier Headphone Power Amplifier (Black)
Brand | LOXJIE |
Color | Black |
Item Weight | 1.32 Pounds |
About this item
- Military grade 6N3 electronic tubes and carefully tuned circuits.Powerful drive circuit up to 600mW at 64Ω .
- Fully balanced headphone amplifier,including balanced input interface.
- Hi-End volume control NJW1195 produced by JRC Japan.
- Use relay for mute control.Humanized operation with memory function.
- Aluminum CNC,very fine workmanship.
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Legal Disclaimer
**If you receive an item with the wrong color, please contact us immediately and we will process and resend a brand new product for free. We are in contact with the Amazon team and they will help us investigate and remove the wrong inventory of goods. This error will not happen again in the future, please rest assured. **Warm up for 30 minutes to get better effect Plugged in the item with the included power supply and gave the tubes time to warm up.After 30 minutes, just plugged in your headphones and perfect sound was coming out of the amp. Please feel free to contact us if there are any quality problem,we will quickly solve it for you!
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Product Description
Product information
Package Dimensions | 10 x 7.5 x 4.2 inches |
---|---|
Item Weight | 1.32 pounds |
ASIN | B07H5HK3QT |
Item model number | P20 |
Customer Reviews |
4.5 out of 5 stars |
Best Sellers Rank | #277,297 in Electronics (See Top 100 in Electronics) #286 in Headphone Amps |
Is Discontinued By Manufacturer | No |
Date First Available | September 7, 2018 |
Manufacturer | LOXJIE |
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the sound quality, value, durability, performance, and power of the hearing amplifier. For example, they mention that it sounds refined and detailed, it's unbelievable value for a fully balanced amp, and that it feels premium. That said, some say it works well for high impedance headphones and that the power is great.
AI-generated from the text of customer reviews
Customers like the sound quality of the amplifier. They say that it developed a very pleasant sound, and everything sounds more refined and detailed. They also say that the amplifier performs well and elevates the music effectively. Customers also mention that it adds warmth to music, and has a slightly wider soundstage. They like that it likes high impedance headphones, and that it helps improve the tone and dynamics of what these lacked. Customers say that this amp is good with female vocals and harsh treble-heavy music.
"...As I stated earlier, in single ended mode the P20 sounds nice enough with efficient headphones (16 ohms - 63 ohms), however, it simply does not..." Read more
"...One thing I did seem to notice is that this amp seems to like high impedance headphones even in the lower powered unbalanced headphone mode...." Read more
"...A big reason for this was that Sennheiser HD6xx headphones sound really good with tube amps...." Read more
"...It doesn't make a stair-step noise and has dang near perfect balance. Better yet, it has a display for the volume level with a basic user interface...." Read more
Customers appreciate the value of the hearing amplifier. They mention that it is an unbelievable value for a fully balanced amp, and a great deal for s balanced set up. Customers also say that the output is very clean for the price. They say it is a solid sound for short money, and that the build quality is very solid for the money.
"...This makes the P20 the lowest priced fully balanced headphone amplifier on the market at the present time...." Read more
"...I think that’s a tremendous value...." Read more
"...Build quality: 9/10: very solid for the priceFunctionality: 10/10: balanced tube amp for $99 with RCA input as well...." Read more
"...April 2019:The Loxjie P20 is currently the best bang for the buck balanced headphone amp...." Read more
Customers like the durability of the hearing amplifier. They mention it has a nice build quality, with smooth edges and a good screen. It's a true balanced hybrid amp with quality components like German WIMA caps and 4 (2 per channel). The amp feels premium and has solid detail.
"...because the P20 also offers a vacuum tube input stage with quality components such as WIMA caps, for a total as shipped price of $89.99..." Read more
"...Construction quality is good but not fantastic. I'm bothered by the volume control which is loose and wiggles around...." Read more
"...Summary: while providing extremely clean sound, excellent build quality and being able to provide a balanced connection for $99 I can't help but..." Read more
"...upper range of the dial to get these level matched, but quality wise is holding its own...." Read more
Customers like the performance of the hearing amplifier. They mention that it works well for their high impedance headphones, and delivers exquisite sound. The build quality is good, and it drives all very well. It works just fine on single ended input, but completely shines when taking a balanced input. It's good for efficient headphones, not power hungry headphones. It gives over.5-.6 watts, but it is amazing.
"...you'll have a great sounding headphone amp that handles high impedance headphones very well for not a lot of money...." Read more
"...This unit works just fine on single ended input, but completely shines when taking a balanced input with a sold 2+ VRMS...." Read more
"...It's incredible. Now, with that said there is a flip side. To be honest I'm not picking up much of a tube sound. If any at all...." Read more
"...The sound is musical and a joy to listen to. Nothings hyped and at high gain levels there is no noticeable distortion through the maxed out amp!..." Read more
Customers like the power of the hearing amplifier. They say it's a good amp, it works well, and sounds good. Some say it has plenty of power to run high impedance headphones like Sennheiser HD 650. Overall, customers are satisfied with the power and performance of the product.
"...It has plenty of power to run high impedance headphones like my Sennheiser HD 650 (300 ohm MassDrop HD 6XX version) and HD-600's, as well as my..." Read more
"...tube amp in my opinion, adds a little bit of magic and also a good bit of power...." Read more
"...This amp is pretty darn good, from what I can tell with my setup and ears. I've tried it ONLY for unbalanced IN, from the Allo BOSS 1.2 DAC...." Read more
"...the cheap Chinese-made switching power supply is not really supplying enough amperage for this amp...." Read more
Customers are satisfied with the balance of the hearing amplifier. They mention that it has a fantastic balanced input and output for the price. The sound is clear, punchy, and non-sibilant. The single ended and balanced output are a plus.
"...It doesn't make a stair-step noise and has dang near perfect balance. Better yet, it has a display for the volume level with a basic user interface...." Read more
"...What more could you ask for at this price. Heck of a deal. Single ended and balanced output. Input connections are very solid built...." Read more
"...But P20's balanced output is a plus. You may roll the tubes on the P20 to get more "tubey" sound if desired...." Read more
"...the sound has softened quite a bit and it's much more balanced...." Read more
Customers are mixed about the quality of the hearing amplifier. Some mention that it has tube goodness, and is pleasant. They also say that it's a euphoric masterpiece with a high quality DAC running a balanced. However, others say that the stock tubes are poor, the quality is good but not fantastic, and the single-ended output is anemic.
"...The P20, or any tube amp in my opinion, adds a little bit of magic and also a good bit of power...." Read more
"...It ends up sounding anemic and ultimately disappointing...." Read more
"...Since the tubes are interchangeable, technically the P20 is also upgradable in the sense that you can upgrade to new tubes from other companies..." Read more
"...are designed, but this little unit adds a lot of clarity and punchiness to the raw output of anything...." Read more
Customers are mixed about the warmth of the hearing amplifier. Some mention that it is clean, detailed, and slightly warm, while others say that it gets a bit hot temperature wise and the tubes are very warm.
"...With this setup of stacked 40mm cooling fans the P20 is now running much cooler and the fans are reasonable quiet, being so small...." Read more
"...not actually be an issue and is working as designed, is this thing gets VERY warm (US 120v)...." Read more
"...Despite not having a true tube sound it's still very warm and pleasant. It's s nice relaxed sound for easy listening...." Read more
"...I haven't used the P20 much because it gets rally hot after just 1 hour of use but it died anyway.April 2019:..." Read more
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Top reviews
Top reviews from the United States
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I've done my subjective listening with upgraded Riverstone "platinum grade" 6N3P-E tubes, which definitely do improve the sound of the P20. All of my observations regarding the P20 pertain to these upgraded tubes.
Unlike some other P20 users, I have not experienced the buzzing sensation in the power supply, which may be caused bwy the PS being placed too close to a computer monitor. However, this is just speculation.
Based on owning other headphone amp's in this price range including the Schiit Magni 3, JDS Labs Atom and Monoprice Monolith Liquid Spark designed by Alex Cavalli (all of which set the bar in this price range), in balanced mode the Loxjie more than holds its own against this competition and is constructed more solidly than the other three amplifiers.
Each of the aforementioned amp's has its own unique sonic signature and does what it does quite well. And while the Magni 3 has been around for over a year, the Loxjie P20, Cavalli Liquid Spark and JDS Labs Atom have only been on the market for the past few months, yet are already receiving accolades for their high value to performance ratio.
These amplifiers have also redefined performance in the under $100 headphone amplifier market. What they accomplish sonically, is better than what most headphone amplifiers five to ten times the price were able to accomplish less than a decade ago.
This is truly impressive.
As for summing up the P20, based on listening to it for the past few weeks, I'd have to say don't waste your time using this amplifier in unbalanced mode. It just does not have enough power unless you are using a low impedance headphone.
However, in balanced mode the P20 becomes a different animal altogether. It has plenty of power to run high impedance headphones like my Sennheiser HD 650 (300 ohm MassDrop HD 6XX version) and HD-600's, as well as my AKG K240 Sextetts (600 Ohm), and has a refined sound (even with its stock tubes) that subjectively rivals amplifiers costing three to four times the price.
I have also been using the P20 successfully with several different lower impedance headphones including the Meze Audio 73 Classics (32 ohms), Hifiman HE4XX (32 ohms), Audioquest Nighthawk Carbon (25 ohms), Fostex T50RP MK3 (50 ohms), NAD HP50 VISO (28 ohms), Grado SR-60s (32 ohms), Koss KSC 75's (60 ohms), Superlux HD681 EVO's (32 ohms), and Sharkk Bravo (40 ohms).
As previously stated, I've also tried the P20 with some higher impedance headphones including the Sennheiser HD650 (Massdrop HD6XX version), Sennheiser HD-600, and AKG K240 Sextett.
I find that in fully balanced mode the P20 works very well with each of these headphones. Moreover, in balanced mode the P20 has no trouble driving my Sennheiser HD6XX or HD600 (300 ohms) and even more surprising, it successfully drives my highly inefficient AKG K240 Sextetts (600 ohms) with headroom to spare.
This is very impressive for a fully balanced headphone amplifier costing under $100.
Most importantly, when used in fully balanced mode, the P20 scales very nicely with better sources, and is very involving to listen to.
I really am impressed with the sound quality of this well constructed little headphone amplifier.
As I stated earlier, in single ended mode the P20 sounds nice enough with efficient headphones (16 ohms - 63 ohms), however, it simply does not have enough grunt to power higher impedance headphones through its single ended inputs and outputs. It ends up sounding anemic and ultimately disappointing.
So if you are going to buy this amplifier, prepare to use it in fully balanced mode and you'll be amazed at how capable the P20 is.
And, moreover, what a great value it is.
I'd also like to see Loxjie offer a fully balanced DAC for under $200 that matches the P20, since it will (along with SMSL's SU-8 {The latest version} and SH-8 balanced DAC and headphone amplifier) set a new standard for balanced headphone electronics in this price range.
If the P20 turns out to be reliable, it will represent one of the best values in headphone amplifiers on the market.
Thus far, highly recommended!
For starters, the included 1.6A switching power supply seemed to create a buzzing sound on all the audio when I first used this amp. I fixed this by replacing it with a dependable, beefy 3A linear power supply in its place. I suspect the cheap Chinese-made switching power supply is not really supplying enough amperage for this amp. Try using a well made 3 amp power supply if you can find one. Next, hooking it directly to the headphone output of my iPad Mini 4 resulted in loud, random crackling sounds. WTF? OK, so I moved to using it with my JDS Labs ODAC DAC hooked to my Apple PowerMac desktop and the loud crackling stopped. But, wait, what is going on with the highs? They sounded strident and distorted and not in a good tube way. Bass seemed lacking, too. OK, so I removed the stock 6N3J "military grade" Chinese tubes and replaced them with a pair of closely matched Riverstone "platinum grade" 6N3P-E (Russian) tubes. Ah, much better. More defined bass and the strident, distorted highs went away.
I did all the initial testing with the unbalanced audio-in and the unbalanced audio-out jacks. Yeah, this headphone amp is suppose to be audio nirvana using the XLR balanced jacks but it should also perform at least with decent sound on the far more common unbalanced jacks. I've got a SMSL SU-8 DAC on order with XLR balanced audio outputs that I'll later try along with some HD650 balanced headphones but not for now. One thing I did seem to notice is that this amp seems to like high impedance headphones even in the lower powered unbalanced headphone mode. My warm sounding Fidelio X2 headphones (30 ohms) sounded OK on this unit. However, switching to 250 ohm Beyerdynamic DT990 Pro headphones sounded much better even in unbalanced mode. There was good control of the bass and the soundscape was nicely defined. There also seems to be something special going on with the imaging in the mid-range on this headphone amp. Not sure what it is and it seems to be far more present on the high impedance headphones than those of lower impedance but I like it. A little bit of the so called Loxjie P-20 "magic", I suppose.
If you order one then you must plan on the possibility of needed to work with it to get it to sound at its best. Your "out-of-box" experience may be frustrating at first. For now, I'm giving the P-20 only 4-stars due to the initial problems that shouldn't be happening "out-of-box". Construction quality is good but not fantastic. I'm bothered by the volume control which is loose and wiggles around. It needs to be better stabilized. Unit could also use more vents to help with the heat it generates. If later testing with the balanced HD650 headphones along with a balanced XLR output DAC improve things I might up the rating some but the initial frustration I had with this amp only rates it 4-stars for now. Oh, and Loxjie absolutely needs to put an Off/On switch on this thing. That's right, there is none. It turns on as soon as the power plug is inserted. You can push in the wiggly front knob to turn in on/off but I would much prefer to see a rocker switch on the back for power. Given the flakey, under amp'ed switching power supply they include, I would NOT want to leave this thing running 24x7 due to heat and fire concerns with this cheap power supply.
Finally, don't expect this unit to produce full blown "tooobe sound". I have an inexpensive Chinese Qinpu Q-2 from several years back that I bought for the same price that does much better in this regard. This is not the headphone amp you want for creating lucious tube sound. It's much closer to solid state sound. Not a bad thing but just make sure you know what you are getting. And realize that for Loxjie to price this nice sounding headphone amp under $100 they had to cut some corners. They included an awful, cheaply made Chinese switching power supply which just barely supplies the required power. Upgrade it to a good power supply that is rated to at least 3A. Some users have mentioned good results using the 5A Jameco Reliapro KPL-060F switching supply ($16). Second, get rid of the awful 6N3J "military grade" Chinese tubes. Those are cheap tubes that can easily be found for around $6 each. They are cheap for a reason. Substitute something like the Russian 6N3P-E that can be supplied in a closely matched pair for about $30 for the whole pair. After those two critical mods you'll have a great sounding headphone amp that handles high impedance headphones very well for not a lot of money.
UPDATE 04/20/19 -- Nix the idea of using the Jameco Reliapro KPL-060F. One poster mentioned it so I ordered one to try out on the P20. No go. It has a smaller 2.1mm inner hole that won't fit on this unit. You need a power plug that has a beefier 2.5mm size inner hole (5.5mm cylinder on the outside). I've got a MEAN WELL GS90A12-P1M 12V 6.6A regulated switching power supply ($32) that is overkill for this thing but it should work and fit the power port on the P20. It looks to have the required 2.5 x 5.5 mm plug size to do the job.
UPDATE 04/22/19 -- The Loxjie P20 runs a bit hot after being on for a while so I looked for quiet cooling solution. Any fan to pull out heat has to be pretty small because the top vent is small. Ordered the "Easycargo 2-Pack 40mm USB Fan, USB Mini-Fan 4010 5V with Multi Speed Controller". Both fans go on the same single USb cable + Speed controller connection. Each of these small 40mm fans can pull about 6 CFM at full speed which isn't very much. However, I double-stacked them on top of each other (be aware of the air flow directions) so that they would pull heat out like an elongated chimney stack from the top Loxjie vent with around 12 CFM of combined fan pulling power and got some excellent cooling results. I don't think a single 40mm fan by itself would give enough cooling power. With this setup of stacked 40mm cooling fans the P20 is now running much cooler and the fans are reasonable quiet, being so small.
UPDATE 04/23/19 -- Finally received the ordered MEAN WELL GS90A12-P1M 12V 6.6A regulated power supply from Amazon. The power plug fits beautifully and is the correct 5.5x2.5 mm size. At over 6 A it has plenty of power and the build quality of ths PS is very good. Testing shows it to put out a very steady 12.3V output with no variance. Have been using an older/cheaper balanced XLR output DAC -- Behringer UltraMatch SRC2496 -- while awaiting the arrival of a more modern SMSL SU-8 balanced XLR output DAC. Putting a pair of XLR balanced Sennheiser HD650 headphones on this little jewel is resulting in incredibly detailed but non-fatiguing sound. Best I've ever heard from a headphone setup. Therefore, I'm raising my rating to 5-stars because with balanced XLR inputs/outputs it sounds so incredibly good. Just be sure to replaced the horrid Chinese power supply and the enclosed Chinese "military grade" 6N3J tubes that come with it. Oh, and please Loxjie.... please put an on/off rocker switch on the back.
Top reviews from other countries
Recomiendo usar la salida Balanceada (XLR), ya que la salida estándar (6.35 mm) no balanceada no esta al mismo nivel en calidad de sonido.
Tampoco es para audífonos sensibles (principalmente IEMS), ya que si existe cierto ruido de fondo debido a la potencia que entrega este amplificador.
Con respecto al sonido, ofrece un sonido cálido muy agradable, agrega mayor naturalidad a los instrumentos, posee buena separación instrumental, a pesar de que la escena sonora es íntima (esta también depende de que DAC utilices).
El rango de frecuencias bajo es su fuerte, tiene buena ganancia lo que le brinda presencia, buen nivel de detalle y autoridad.
El rango medio es muy bueno, consigue generar un buen nivel de detalle con un timbre natural (debido a los tubos), sobre todo en las voces pues las presenta centradas y al frente del resto de instrumentos.
El rango alto (agudos) es quizá el que pierda algo de detalle, ya que posee una ganancia un poco menor, y algunos detalles y micro-detalles se pierden en este rango, la perdida de detalle es muy ligera, y lo más importante, el sonido no pierde esa sensación de espacialidad, de aire entre los instrumentos, es decir, no se siente encerrado el sonido, como podría ser con un amplificador de estado sólido, pues es la ventaja de los tubos. En lo personal me agrada este manejo de los agudos, ya que en mi experiencia personal es un sonido más relajado y perdona las malas grabaciones donde podrían existir sibilancias en las frecuencias agudas, haciendo que sea más versátil y útil para largas sesiones de escucha.
Por todo lo que ofrece por este precio, lo recomiendo ampliamente.
PD: Lo utilizo junto con el DAC Modi 3+
Reviewed in the Netherlands on October 26, 2023
L'uscita col jack da 6.3 non è molto potente quindi se usate cuffie ad alta impedenza o con necessità di molta corrente allora sarebbe meglio usare l'uscita bilanciata che darà tutto un altro livello di potenza soprattutto ad impedenze un po' più impegnative. Ho delle Superlux HD681 EVO che sono 32ohm sull'uscita col jack (sbilanciata) e delle Sennheiser HD 560S che sono 120ohm sull'uscita a masse separate (o bilanciata) e in entrambi i casi è un piacere stare seduti alla scrivania ad ascoltare musica.
Ma poi, vogliamo parlare di quanto le valvoline siano fascinose? C'è addirittura un led blu sotto le valvoline che fa un lieve illuminazione che però ci sta un sacco.
Personalmente sono soldi davvero ben spesi e visto il risultato credo che mi affiderò a questo brand anche per il DAC.
Realmente al final es una cuestión de gustos, de comodidad (si no deseas usar un ecualizador).
En mis pruebas he utilizado como auriculares un Focal Stellia y un HIFIMAN HE-1000SE, que creo que aportaron suficiente "claridad" a mis pruebas.
Reviewed in Canada on October 22, 2019