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Stereo Tube Headphone Amp with 24-bit/96kHz USB DAC, Bluetooth, and Preamp Out
Enjoy the sound, style, and convenience of a headphone amplifier with Bluetooth®, RCA, and USB inputs. This hybrid tube amp combines the warm, soothing sound of a tube preamp with the efficiency and clarity of a solid state headphone amplifier. Connect your computer to the USB input to use the 24-bit/96kHz Digital to Analog Converter (DAC) to stream WAV, AIFF, FLAC, other high-resolution lossless audio files. Stream your digital music to the amp using the built-in Bluetooth 4.0 radio with the superior sound of the Qualcomm® aptX™ audio codec or connect an external audio device, such as a CD player, to the RCA line inputs. Connect a pair of powered speakers or an external amplifier to the preamp outputs to share the high-quality tube sound with your family and friends. Not only does this amp sound great, it looks great, too! The black panels, chrome accents, and the warm glow of the exposed tubes present a minimalist retro look, which will enhance any home or office environment with a hint of old school styling.
Warm & Rich Sound | Simply Attractive | Bluetooth Convenience
Stereo Tube Headphone Amp
Sound Quality: Life is too short for audio products that don't sound great! We believe that the whole point of listening to music is to hear it as the artist intended. Our engineers and audio experts have spent countless hours listening to and comparing various amplifiers until we were satisfied we had found models that fit our demanding standards.
Style: The polished piano black case, brushed aluminum face, and the warm glow of the exposed tubes combine to give this amp a sexy appearance that is at once both classic and futuristic.
Versatile: Enjoy your music the way you want! Use the stereo RCA jacks to connect directly to a CD player or use the Bluetooth® v4.0 radio to connect wirelessly with your phone. Connect your computer to the USB input to enjoy WAV, AIFF, FLAC, and other high-resolution lossless audio files using the built-in 24-bit/96kHz DAC. Add powered speakers or an external amplifier to the preamp outputs to share the high quality tube sound with your family and friends. Add a subwoofer by connecting to the RCA preamp outputs for even more room shaking sound. The Qualcomm® aptX™ audio codec ensures that your wireless streaming sounds as clean and clear as your wired connections.
Bluetooth audio for grownups. Listen to music like you care about it.
Because of its lossy nature, digital music can often lose some of the depth and warmth that gives it life. Wireless streaming adds an additional layer of digital compression, which can further degrade the audio quality. The addition of the tube preamplifier stage adds back some of the warmth and richness, breathing new life into your digital music, while the Qualcomm® aptX™ audio codec ensures clean and clear Bluetooth® streaming. Connect your computer to the USB input to use the 24-bit/96kHz Digital-to-Analog Converter to stream high-resolution lossless audio files, such as WAV, AIFF, and FLAC files.
- 500 milliwatts/channel class AB power amplifier
- Less than 0.1% total harmonic distortion
- Qualcomm® aptX™ audio codec for clean and clear wireless streaming
- 20Hz ~ 20kHz frequency response
- Tube preamplifier stage with solid state power amplifier
- Bluetooth® v4.0 wireless streaming
- One stereo analog RCA input
- One stereo RCA preamp output
- 5-way binding post speaker connections
Monoprice not only stands behind every product we sell with a 1 year replacement warranty, we offer a 30-day money back guarantee as well! If the product you purchase does not satisfy your needs, send it back for a full refund.
Quality at a Fair Price
Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.
Hassle Free Packaging
Monoprice exists to bring simplicity, fairness, and confidence to technology choices. This product features recyclable packaging that is simple to open, cost effective, with minimal waste, and fully protective as it travels to you.
Service & Support
You're never on your own with Monoprice products! We have a full team of friendly and knowledgeable technicians available to answer your questions, both before and after the sale. Contact our technical support team for questions about our products, troubleshooting, or even suggestions for products to fit your particular needs. Not to be outdone, our friendly and helpful customer service team is here to make your ordering, delivery, and any possible returns a quick and painless operation, from start to finish!
|Inputs||RCA Line In, USB DAC, Bluetooth®|
|Outputs||1/4" TRS Headphone, RCA Preamp Line Out|
|Frequency Response||20Hz ~ 30kHz ±2dB|
|Total Harmonic Distortion||≤ 0.1% @1000, 1kHz, 300mW|
|RMS Power Output||500mW/channel @100Ω|
|Signal-to-Noise Ratio||≤ 88dB|
|Digital-to-Analog Converter (DAC)||24-bit/96kHz|
|Bluetooth Version||4.0 with Qualcomm® aptX™ audio codec|
|Bluetooth Range||Up to 32 feet (10 meters)|
|Tube Types||2x 6N2|
|Input Voltages||100 ~ 120 VAC, 60 Hz, 200 ~ 230 VAC, 50 Hz|
|Dimensions||7.5" x 5.0" x 9.8" (192 x 126 x 248 mm)|
|Weight||6.6 lbs. (3.0kg)|
- User's Manual (Aug 16, 2016)
The Bluetooth® word mark and logos are registered trademarks of Bluetooth SIG, Inc.
Qualcomm® is a trademark of Qualcomm Incorporated, registered in the United States and other countries. aptX™ is a trademark of Qualcomm Technologies International, Ltd., registered in the United States and other countries. Qualcomm® aptX™ is a product of Qualcomm Technologies International, Ltd.
Questions and Answers
1. Bluetooth with aptX: (Yes) - make sure your device supports aptX
2. Preamp output: (Yes) – connects directly to my A/V receiver
3. High quality at a fair price: (Yes) – See detail review below
4. Looks cool on the shelf: (Yes) – Well built, piano back, glowing tubes.
Before doing any evaluations, I performed 4 separate burn in sessions for about 10 hours each to make sure the preamp tubes were fully burnt in. THIS IS VERY IMPORTANT! The burn in sessions were done with the MP USB input to my laptop playing 16 bit/44.1 kHz flac files. Some reviewers reported hum or interference. I did not get any noise with any of my tests. I have a Furman PST-8D surge/power conditioner strip that I run all of my equipment from and have never experienced any noise/interference issues with this setup.
Bluetooth Evaluation: (Exceeded expectations)
Connecting to Bluetooth is very easy. Once you connect for the first time, your device will automatically connect the next time once in range or Bluetooth is turned on for both devices. The connection is whisper quiet with no hum or interference noise. Music quality was very crisp and clear with no hint of background noise even for quiet sections of songs like “Winter Wind” by Run River North. OK, the real test, does Bluetooth sound as good as direct USB connection? For the test I played the same flac files on my phone through MP Bluetooth, on my laptop with MP USB connection and one other test using USB flash drive directly from the A/V receiver. To my pleasure the MP Bluetooth sounded just a good as the MP USB test. I even preferred the MP Bluetooth tube preamp playback better than the A/V receiver direct USB flash drive playback. Warmer and more enjoyable music experience.
USB input Evaluation: (Met expectation)
I used the USB option to burn in the unit but will probably not use this input option down the road in my setup. I usually connect my laptop directly to the HDMI input port on my A/V receiver for both video and audio. Although, I did go ahead and evaluate the USB performance. Some reviews noted the USB connection would disconnect. I did not have that problem during the 40 hour burn in sessions except for one time when moving my laptop. The USB cable was pulled a little bit to one side of the laptop port and the MP disconnected. The MP immediately reconnected once I reseated the USB plug in the laptop. I have a feeling the other customers with the disconnect issue were due to the USB cable not getting a good connection. The included free USB cable is not the best. I would spend a few dollars and get a better/longer gold plated cable like MP product #5438 for a more secure connection if you are going to use the USB input extensively. I did not get any noise or interference like some of the other reviewer’s experienced. As for sound quality, The MP tube amp sounded really good with various music flac files with bit rates ranging from 16/44.1 – 24/96 kHz. I preferred the MP USB tube preamp playback sound better than my A/V receiver direct USB flash drive playback. The musical instruments and voices seamed more real and enjoyable.
Analog/CD input: (Did not test)
I really do not have any practical use for this in my setup. My turntable already goes through a phono preamp to my A/V receiver and my son hooks up his mixing board once and a while to my A/V receiver. I guess if you have a device that does not have Bluetooth or USB output you could use this input.
Headphone output Evaluation: (Met expectation)
I’m not a headphone person at all and only use earbuds when working out at the gym. I went ahead and used a ¼ adapter I had to try out my Polk earbuds with the headphone jack. The headphone output sounded excellent with good bass, mid and high frequency. The output power was more than enough to drive these small little earbuds. Sorry, not able to evaluate more power hungry headphones.
Pros: Bluetooth aptX, preamp output, well built, looks cool, USB Input, simple setup, easy to use, meets my expectations and needs 100%, Very happy and would purchase again.
Cons: Power light is way too bright and takes away from the warm glow of the tubes. It’s like a spotlight beaming out at you. I ended up putting a small piece of black electrical tape over the power light. That did the trick and I can now enjoy the full glow of the tubes without wearing sunglasses.
7 months ago
9 months ago
This unit replaces another (earlier model 13194) MP Tube amp I was using as a preamp via the headphone jack. This 13194 unit was NOISY! I tried to quiet it down by adding a solid earth ground and rolling all four tubes. Despite my efforts, there remained a high frequency hiss plus a steady low hum.
I am in love with the sound of this amp. It is very warm and provides a terrific sound stage. I use all three inputs. I have AirPlay from an AirPort Express connected to the CD input and an AudioTechnica USB turntable hooked to the USB input. I occasionally pair my iPhone with the unit's Bluetooth and although it is my least favorite in terms of sound quality, it works as well as any Bluetooth I've ever used.
The preamp-out feature is terrific for driving my McIntosh and gives me a complete, end-to-end vacuum tube setup. I am completely happy with this amp and would recommend it to anyone.
8 months ago
After taking it out of the box, I noticed that one of the bulbs looked kinda funny. The top was milky white as opposed to silver, and after setting it up and giving it a try, it turned out that the tube was actually cracked and the amp only had one channel of sound as a result. I sent customer support a message to see if I could just get a replacement tube, but Monoprice does not sell replacements or ship them so no dice. I had to send this one back for a replacement.
Half a week later, the next one arrived. Still had the tubes already inserted, but these ones seem fine at least. The tubes light up during use with two dim lights inside which aren't nearly as distracting as the power light. The left tube only has one light in there for some reason, but it doesn't seem to affect the sound so I don't think much of it other than the innate want of symmetry, but whatever.
I can say that this got rid of some particularly bad speaker crackle that my old Monoprice USB DAC/AMP could not get rid of. I am happy about this, and the sound seems to be pretty great. I'm not exactly a hardcore audiophile, but it seems to be easier to listen to for longer periods than before. I suppose that's the "warm" sounding characteristic of tube amplifiers. It's also quite a sturdily built piece of equipment since it's all metal and the volume knob is quite smooth.
Now for the not so good. Like the previous reviewer, I'm having an irritating issue every once in awhile where my computer stops detecting the amplifier for a moment as if it disconnected. My music is then stopped, or even worse, it starts blaring out of my awful built in monitor speakers. Not pleasant. I need to test another USB cable to see whether the issue is with the amplifier itself or the cable.
In conclusion, it works decently, but you should maybe either look for something a little more reliable from a bigger brand, or perhaps go for the Monoprice 11567 Desktop Headphone Amplifier. It's cheaper, given me less issues and has less that can go wrong with it. It's also doesn't cost about $5-8 every time a bulb burns out. If you give it a chance though, it's a very attractive piece on the desk (although a bit big) and it sounds quite good.
I have tested this amp with my AKG Quincy Jones Q701 Reference Studio Monitors, JBL Everest Elite 700's in wired mode, and my JBL S200a in ear headphones. In every case, it had more than enough power to drive them beyond comfortable listening levels, and again in every case they each sounded awesome.
My typical listening source is Spotify Premium either on my PC or my phone, and I have a very eclectic musical personality. I have tried this with everything from Rock, to Hip Hop, to electronica, to folk, to jazz, to gospel and worship. In all cases, the sound is warm and full. There is no crosstalk between the channels, and the vocals jump right out at you. The treble is extended and revealing without becoming harsh. The bass is tight and accurate and not boomy. And finally, the mids are slightly forward making vocal tracks really come alive.
All in all, I think this is excellent, not just for the money but excellent period. I am even thinking about buying at least two more. One to use at my computer at home, and one to use as a BT receiver for my home stereo.
2 months ago
It does have one major fault, though: It picks up noise from EVERYTHING. If my cable modem was anywhere near it, I'd get buzzing and an occasional burst of radio chatter. If the HDMI cable from my monitor got too close, I'd get a high pitched whine whenever the screen was mostly white. If my phone was anywhere near it, I could hear the couple times a minute it was polling towers for data. If you're going to get this thing make sure you have a spot for it with some space around it, otherwise it's going to drive you nuts.
10 months ago
5 months ago
9 months ago
Built well, looks good, sounds pretty good just not loud enough for me.
9 months ago
3 months ago