--- product_id: 333147301 title: "BOYUURANGE A50 MKIII 300B Tube Amplifier" brand: "boyuurange" price: "€ 1774.10" currency: EUR in_stock: true reviews_count: 13 category: "Boyuurange" url: https://www.desertcart.hr/products/333147301-boyuurange-a50-mkiii-300b-tube-amplifier store_origin: HR region: Croatia --- # Class A single-end tube amp design 7.6W max output power Steel & aluminum chassis with tube cage BOYUURANGE A50 MKIII 300B Tube Amplifier **Brand:** boyuurange **Price:** € 1774.10 **Availability:** βœ… In Stock ## Summary > 🎢 Elevate your audio game with the REISONG A50 MKIII β€” where vintage warmth meets modern precision. ## Quick Answers - **What is this?** BOYUURANGE A50 MKIII 300B Tube Amplifier by boyuurange - **How much does it cost?** € 1774.10 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/333147301-boyuurange-a50-mkiii-300b-tube-amplifier) ## Best For - boyuurange enthusiasts ## Why This Product - Trusted boyuurange brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Premium Transformer Tech:** Imported 0.35 stack thickness transformers ensure ultra-low distortion and superior frequency response. - β€’ **Robust Power with Precision:** 7.6 watts of pure Class A power delivering crystal-clear dynamics and deep bass resonance. - β€’ **Iconic Tube Cage & VU Meters:** Show off your gear with a stylish protective cage and real-time visual feedback for that pro studio vibe. - β€’ **Built for the Discerning Listener:** Optimized circuitry for enhanced aroma, midrange clarity, and bass depth β€” because your sound deserves the best. - β€’ **Audiophile-Grade 300B PSVANE Tubes:** Experience rich, warm, and holographic sound that turns every listening session into a sonic journey. ## Overview The REISONG A50 MKIII is a high-fidelity integrated tube amplifier featuring dual PSVANE 300B power tubes in a single-end Class A design. It delivers 7.6 watts of pure, warm sound through premium imported transformers and optimized circuitry, housed in a durable steel and aluminum chassis with a protective tube cage and VU meters. Perfect for audiophiles seeking rich, detailed audio with a classic tube amp aesthetic. ## Description Buy BoyuuRange REISONG A50 MKIII 300B HiFi Intergrated Tube Amplifier Single-end Class A Valve Amp with Tube Cage: Amplifiers - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases Review: Audio quality = AMAZING (detailed, tubey); factory QC = POOR (crackling noise, loose knobs) - AMAZING, nothing short of AMAZING, but not without its hiccups. This is my second A50 purchase, coming from the Sprout100 and the INFI hybrid class AB amplifier. For reference, my rig: TIDAL Hi-Fi subscription played with AUDIRVANA, speakers and subwoofer ELAC Debut B6.2 and DAC S.M.S.L SU-9 paired with some very good RCA interconnects. Brings tears to the eyes :) My first A50 did sound good, but within two days it malfunctioned, developing hiss and crackling noise on the right channel, similar to what others have experienced here. After several days with support (the very helpful Martina), I returned it and tried again with another purchase. Now this second one *ALSO* arrived defective, but a minor defect - the front knobs were loose and fell off the unit when assembling! Being reasonably handy I fixed it myself, but boy I was pissed! However, all it took was to turn it on... and amazing does it sound!! After breaking in a few weeks, I hereby testify the sound is somewhat holographic, delicious - I can't really stop listening to it, which is the greatest compliment any audio gear manufacturer can get. So, in short, their factory QC (or the shipping process, whatever) is indeed poor and NEEDS improvement. TWO defective units in a row! But it was all worthwhile. It works beautifully and I strongly recommend the A50 over anything you can get on desertcart regarless of the price. After coming from decades of Denon and Onkyo AVRs, then the PSAudio's Sprout100 amplifier, then the INFI's class AB hybrid tube amplifier, and *two* A50's, I'm now settled. This is an amazing purchase, regardless of the inconveniences and nuisances. Buy it! Be aware and ready to return it (once or twice) if need so, but eventually you won't be dissatisfied (do not recommend for travellers and international buyers for this reason). To the manufacturer: you *REALLY* need to pull up your socks with your factory QC and your shipping gear. When it works, the quality of the product overcomes the hassles (it is THAT good), but not all customers may have the same tolerance. All that said, congrats for this amplifier. It is marvelous. Ed Review: More! - Had the company's A10 EL34 amp for 10 months with no problems decided to pick up their A50 300B Amplifier. The amp is built solidly unlike many reviewers claim that the 300B tubes are loose, the tubes in my Amp mount solidly, don't move. I'm guessing the people making the claim of loose tubes just don't have them seated properly. Another claim made by some people is this amp has a hum. My Amp is dead quiet, no hum. Maybe their equipment just isn't properly grounded. Another complaint I saw was barely operating VU meters. Again, mine work as they should, as sound levels go up the VU meters move more. Once the amp reaches audible distortion levels the meters are well into the red. The A50 weighs 40 pounds,, the A10 weight 23 pounds. The A50 claims to output 1-2 watts more than the A10. The A50 while not louder than then the A10 does have a much fuller sound. I'm guessing it has to do with the A50's larger transformers than the tubes. When I listen to the A10 I feel the need to run a Schiit Loki (4 band equilizer) between the source and the amp to get the sound I want. With the A50, I haven't felt the need for the Loki Equilizer. I do wish the A50 was point to point wiring, it isn't it has several PC boards and the 300B tubes sem to be mounted to two of them. We'll have to wait and see if it matters. Sound wise, I like the A50 over the A10, that said I feel the A10 has the edge when it comes to build quality since it doesn't employ point to point wiring. It does aper the A50 uses beer parts though. In the end, I like them both, both are great values... on sound where it really matters the A50 is clearly better. ## Features - Factory add an Inductance transformer and Bipolar filter circuit to get the nicer sound for the MKIII.Come with a Tube Cage and VU meters. - Power output tube: 300B Γ— 2 (Brand PSVANE) - Power Transformers: new imported 0.35, stack thickness 60MM (114-60). - Output amplifier core: core 0.35 new imported thick high silicon (86-50). - Some of Senior audiophile optimization the electric circuit,it is better at arom,intermediate frequency and bass. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B094HX4LMY | | Best Sellers Rank | #221,542 in Electronics ( See Top 100 in Electronics ) #1,295 in Audio Component Amplifiers | | Brand Name | BOYUURANGE | | Customer Reviews | 4.2 out of 5 stars 147 Reviews | | Item Dimensions | 14.76 x 11.42 x 7.09 inches | | Item Weight | 18 Kilograms | | Item dimensions L x W x H | 14.76 x 11.42 x 7.09 inches | | Manufacturer | BOYUURANGE | | Material Type | Steel, Aluminum, Imported Cores | | Maximum Output Power | 7.6W | | Maximum Supply Voltage | 120 Volts | | Minimum Supply Voltage | 110 Volts | | Model | BOYUURANGE A50 MKIII 300B | | Mounting Type | Surface Mount | | Number of Channels | 2 | | Output Power | 7.6 Watts | | Part Number | BoyuuRange A50 MKIII 300B | | Specification Met | FCC | | Unit Count | 1.0 Count | | Voltage | 120 Volts | ## Product Details - **Item dimensions L x W x H:** 14.76 x 11.42 x 7.09 inches - **Manufacturer:** BOYUURANGE - **Maximum Supply Voltage:** 120 Volts - **Minimum Supply Voltage:** 110 Volts - **Voltage:** 120 Volts ## Images ![BOYUURANGE A50 MKIII 300B Tube Amplifier - Image 1](https://m.media-amazon.com/images/I/51yQqGyJKIL.jpg) ![BOYUURANGE A50 MKIII 300B Tube Amplifier - Image 2](https://m.media-amazon.com/images/I/61nzPbs0FZL.jpg) ![BOYUURANGE A50 MKIII 300B Tube Amplifier - Image 3](https://m.media-amazon.com/images/I/61A9gdTUJFL.jpg) ![BOYUURANGE A50 MKIII 300B Tube Amplifier - Image 4](https://m.media-amazon.com/images/I/61Kl2FDoD4L.jpg) ![BOYUURANGE A50 MKIII 300B Tube Amplifier - Image 5](https://m.media-amazon.com/images/I/51T2l+9FGpL.jpg) ## Questions & Answers **Q: I have a full range 103db speaker and my hearing is sensitive to speaker hiss at idle. Does this amp generate speaker hiss at idle?** A: My speakers are 89 dB sensitivity and I can hear tube hiss at 12 o'clock on the volume control if I put my ear on the drivers without music playing. Not a problem at listening position and at 12 o'clock the music is plenty loud in my biggish room (40x18x9). At 105 dB it may be a problem but I guess you won't need to crank it to 12 o'clock either. Hope that helps. Overall I am very happy with the purchase. Great value, great sound, well built amp. The support service has been quite responsive too. Good luck **Q: What's the difference in sound characteristics between this 300b amplifier vs an el-34 amplifier such as the boyuurange mt-34? thank you...** A: The 300B sound is magical in the midrange, with less definition than EL34 in the bass and treble regions. If you're into vocals,300B is the way to go, not so much rock or electronica. **Q: How is it that you isolate the rectifier board from the chassis?** A: Vinh, I took an audio recording of the hum just to try and find out exactly what kind of hum it is. I inspected the recording through a spectrogram. It turns out the hum is actually a chord of hums. There are hum notes at 95hz, 120hz*, 240hz* 360hz*, 600hz, and 720hz (*these were the loudest notes). I used a multimeter and checked for continuity between the IEC and RCA grounds. There was continuity. I opened up the unit and removed the exact rectifier board screw you described, as per your instructions. The hum was still present. There was still continuity between the IEC and RCA. I then tried removing all but one of the screws (I did not remove the screw that transformed the hum into a buzz when removed). The hum was still present. I checked the IEC and RCA for continuity with these three screws removed; there was continuity. Since removing those three screws did nothing, I put them back. Out of curiosity, I removed the one screw with the metal ring that was a part of the board underneath it. After I removed this screw I checked for continuity between the IEC and the RCA; There was NO continuity when this particular screw was removed (again, this is the screw that when removed, added unbearable buzzing to the amplifier output). I put that screw back since I already documented what this unit sounded like with this particular screw removed. Nothing I did to the rectifier board solved my hum issue. This is a low-level hum coming from 96dB sensitivity speakers that sit about one meter away from my listening position. Other bits of diagnosis information: If I listen to loudly mastered music playing at a low to moderate volume, I don’t hear the hum. If I listen to quietly mastered recordings at low to moderate volume, the hum is noticeable. The hum does not change whether the volume knob is at minimum or turned to maximum. The hum does not change when the input is changed between Aux, CD, and Tape. The hum did not change when there were absolutely no inputs plugged into the amplifier. Swapping the positions of all the tubes did not change the hum. I am completely baffled. **Q: Can this amp drive a pair of def. tech.bp7002: frequency response 15-30,000 hz sensitivity 92 db 8-ohm imped up to 400 watts? thx!** A: Definitely, unless you are playing hard metal rock to ear splitting level. It drives my 8 ohm, 87 dB sensitivity speakers to satisfying level. Go for it. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Audio quality = AMAZING (detailed, tubey); factory QC = POOR (crackling noise, loose knobs) *by E***D on May 23, 2021* AMAZING, nothing short of AMAZING, but not without its hiccups. This is my second A50 purchase, coming from the Sprout100 and the INFI hybrid class AB amplifier. For reference, my rig: TIDAL Hi-Fi subscription played with AUDIRVANA, speakers and subwoofer ELAC Debut B6.2 and DAC S.M.S.L SU-9 paired with some very good RCA interconnects. Brings tears to the eyes :) My first A50 did sound good, but within two days it malfunctioned, developing hiss and crackling noise on the right channel, similar to what others have experienced here. After several days with support (the very helpful Martina), I returned it and tried again with another purchase. Now this second one *ALSO* arrived defective, but a minor defect - the front knobs were loose and fell off the unit when assembling! Being reasonably handy I fixed it myself, but boy I was pissed! However, all it took was to turn it on... and amazing does it sound!! After breaking in a few weeks, I hereby testify the sound is somewhat holographic, delicious - I can't really stop listening to it, which is the greatest compliment any audio gear manufacturer can get. So, in short, their factory QC (or the shipping process, whatever) is indeed poor and NEEDS improvement. TWO defective units in a row! But it was all worthwhile. It works beautifully and I strongly recommend the A50 over anything you can get on Amazon regarless of the price. After coming from decades of Denon and Onkyo AVRs, then the PSAudio's Sprout100 amplifier, then the INFI's class AB hybrid tube amplifier, and *two* A50's, I'm now settled. This is an amazing purchase, regardless of the inconveniences and nuisances. Buy it! Be aware and ready to return it (once or twice) if need so, but eventually you won't be dissatisfied (do not recommend for travellers and international buyers for this reason). To the manufacturer: you *REALLY* need to pull up your socks with your factory QC and your shipping gear. When it works, the quality of the product overcomes the hassles (it is THAT good), but not all customers may have the same tolerance. All that said, congrats for this amplifier. It is marvelous. Ed ### ⭐⭐⭐⭐⭐ More! *by J***N on April 19, 2021* Had the company's A10 EL34 amp for 10 months with no problems decided to pick up their A50 300B Amplifier. The amp is built solidly unlike many reviewers claim that the 300B tubes are loose, the tubes in my Amp mount solidly, don't move. I'm guessing the people making the claim of loose tubes just don't have them seated properly. Another claim made by some people is this amp has a hum. My Amp is dead quiet, no hum. Maybe their equipment just isn't properly grounded. Another complaint I saw was barely operating VU meters. Again, mine work as they should, as sound levels go up the VU meters move more. Once the amp reaches audible distortion levels the meters are well into the red. The A50 weighs 40 pounds,, the A10 weight 23 pounds. The A50 claims to output 1-2 watts more than the A10. The A50 while not louder than then the A10 does have a much fuller sound. I'm guessing it has to do with the A50's larger transformers than the tubes. When I listen to the A10 I feel the need to run a Schiit Loki (4 band equilizer) between the source and the amp to get the sound I want. With the A50, I haven't felt the need for the Loki Equilizer. I do wish the A50 was point to point wiring, it isn't it has several PC boards and the 300B tubes sem to be mounted to two of them. We'll have to wait and see if it matters. Sound wise, I like the A50 over the A10, that said I feel the A10 has the edge when it comes to build quality since it doesn't employ point to point wiring. It does aper the A50 uses beer parts though. In the end, I like them both, both are great values... on sound where it really matters the A50 is clearly better. ### ⭐⭐⭐⭐⭐ What an awesome sound - but what's even more awesome is TheTubeAmp store! *by S***S on August 11, 2023* This product is sold on Amazon by TheTubeAmpStore. That's what I really want to write the review about - their service, honesty, prompt replies and quick turnaround on my repair amp which had a power transformer issue after 4 months of use. After I reached out, they replied within one hour. I described my issue and they sent me a shipping label. I boxed it up and sent it off. Four days later, Rick J. from the tech support team reached out, told me what my issue was and told me my options. Long story short, 10 days after I shipped it to them, it returned to my doorstep and was fixed 100% under warranty and has worked flawlessly for the last week. That was the most impressive customer service I've ever experienced in my many years in the HiFi hobby. Now the amp... it's so crystal clear. Yea, cliche, but the 300b tube sound is definitely more warm and slightly subdued. I have an Audio Space 2.8i (which costs more than this) which is a push/pull tube amp centered around the 12AX7 tube design. That ampo is also quite good, but it's very DIRECT and very dialed in. Kind of punchy, clear and more in-your-face sounding. And, the tradeoff is that it's kind of fatiguing. This amp (with the stock tubes) is anything but what I described. You won't get tired and dulled or over-stimulated senses from this amp. It's more mellow with the mids so smooth and warm. But, really, the biggest surprise was how wide the sound stage is. I didn't expect that. In my medium sized room it gets plenty loud and even turned up, no distortion at all. The sound seems to come from all around. I'm using them with vintage Klipsch speakers with a 95db efficiency rating. I've not tried them with anything other than these speakers...but I'm sure it'll be just fine with 88db rated speakers too. There's no hum or hiss at all. I use it to play my vinyl records. In between songs you cannot hear any surface noise. It also puts out plenty of bass. I have a subwoofer but I have not needed it with this amp. I think the stock tubes sound fine.... but after a couple months I read a lot of stuff where people have upgraded the 300b tubes with a pair of Genalex PX300B Gold Lion tubes. The are expensive (they start at around $420 for a pair of them). I didn't need them, but I wanted to just "hear" for myself what I was hearing about how these good these Gold Lion tubes were.... at this point I can say I will never buy another amp. I listen to a lot of jazz, acoustic music, indie rock and pop, old country and old school blues from the 1920s and 1930s. It all sounds great on this. The vocals are so clear and full. The knobs turn so smoothly smooth and the fit and finish is wonderful to look at. Even if you don't upgrade the 300b tubes, this will still sound great. These are only my opinions. I'm not an audiophile but heard how different the tube experience can be. Dang, no kidding. If you are considering your first tube amp - this will likely blow you away. If you are a tube guy already - maybe the 300b "tube reputation" has you wondering. I don't think you can go wrong with this especially at $849. ## Frequently Bought Together - BoyuuRange REISONG A50 MKIII 300B HiFi Intergrated Tube Amplifier Single-end Class A Valve Amp with Tube Cage - Micca 14 Gauge Pure Copper Speaker Wire, 12 Feet (4 Meters 13.1ft Actual), 2 Pack Pair, Gold Plated Banana Plugs, Soldered Construction, Slim Design, 245 Strands, for Stereo or Home Theater - AC Power Filter Power Conditioner - WAudio AC Power Purifier with Surge Protector, Black --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/333147301-boyuurange-a50-mkiii-300b-tube-amplifier](https://www.desertcart.hr/products/333147301-boyuurange-a50-mkiii-300b-tube-amplifier) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-20*