Volume Pricing (Log In to see Member Pricing)
25 Watt Stereo Hybrid Tube Amplifier with Bluetooth
Hear for yourself why the Wall Street Journal calls this "The Miracle of a $150 (or Less) Tube Amplifier". Find out more
Hit the trifecta of sound, style, and convenience with this 25-Watt Stereo Hybrid Tube Amp! The tube preamp stage adds warmth and richness that solid-state circuits can't touch, breathing new life into your digital music. The black and chrome appearance with exposed tubes gives a look of uncluttered simplicity, which looks great in any office, study, or even in the midst of the swankiest cocktail party. Featuring wired RCA and wireless Bluetooth® connections, it achieves a level of versatility and easy usability that is unsurpassed.
Warm & Rich Sound │ Simply Attractive │ Bluetooth® Convenience
25-Watt Stereo Hybrid Tube 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 components until we were satisfied we had found models that fit our demanding standards.
Style: Featuring a polished piano black case and a brushed aluminum face, the exposed tubes and lighted VU meter 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.
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 give it life. Additionally, 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.
- 25 watts/channel class AB power amplifier
- Less than 0.1% total harmonic distortion
- Bluetooth® v4.0 wireless streaming
- 20Hz ~ 20kHz frequency response
- Tube preamplifier stage with solid state power amplifier
- One stereo analog RCA input
- 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.
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!
|Frequency Response||20Hz ~ 20kHz ±2dB|
|Total Harmonic Distortion||0.1%|
RMS Power Output
(4-ohm load @ 1kHz)
Peak Power Output
(4-ohm load @ 1kHz)
|Output Impedance Range||4 ~ 16 ohms|
|Input Impedance||47 kilohms|
|Treble Adjustment Range||-10dB ~ +10dB|
|Bass Adjustment Range||-10dB ~ +10dB|
|Input Voltage Range||100 ~ 120 VAC, 60 Hz|
|Tube Types||6N1 and 6P15|
|Dimensions||10.6" x 5.9" x 11.8" (268 x 150 x 300 mm)|
|Weight||8.2 lbs. (3.7kg)|
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc.
Questions and Answers
I like to use this amplifier as center channel mono amplifier for my vintage stereo system to drive a center speaker. Can I set this amplifier in mono mode?/thanks
My current headphone amp is plugged in this way.
Should you require additional assistance, please reach out to our technical support team with a detailed question via any of the methods available here:
Our knowledgeable Technical Support staff would be more than happy to assist. Thank you
Is there another modul i can add on to expand the RCA ?
Like an audio switch?
First the negatives: The "25 watts" is "peak power" output. This specification is rarely, if ever, used by audio component manufacturers. If you look closely the "RMS" output it is "15 watts" into "a 4 ohm" load.
Many speakers available present an 8 ohm load, and most amplifier companies will express "RMS" power into 8 ohms which divides the actual RMS power of this amp (rated into 4 ohms at which time it reaches its stated level of distortion) by half or approximately 7-8 watts - if you were to compare it to other amps using a RMS into 8 ohm load. Now, that being said, its the first watt that is important and this unit does that very well. 7-8 watts for a desktop, office, bedroom or dorm-room system is more than enough.
Secondly, the power switch is clunky and mechanically scratchy when actuated. It does not inspire confidence in terms of long-term reliability. This "problem" stands out ironically because the rotary knobs are wonderfully silky, with nice resistance and not at all what I would expect at this low price point - in a good way.
Finally, like others, I could not completely remove the protective plastic from the "vu meter" there is some residual still stuck under the bezel that I won't attempt to remove for fear of causing more harm than good. This is a petty aggravation.
Now for the reason to buy this unit: the sound! Used within limits, it renders mid-range (voice, acoustic guitar, etc.) with amazing detail, dynamics and tone color. I'm listening to the amazing guitarist Michael Hedges (streamed online music service 16bit-44.1khz) while I type. The qualities of his amplified and effects-affected Martin come through clearly with good rhythmic drive and the delicate characteristic tone "color" associated with his Martin. Truly amazing for this price point!
Extreme highs and lows do not hold up quite as well, but I ascribe to the belief of "get the mid-range right and everything else will fall into place". Do not expect headbanging, Skrillex or Metallica to hold up well. Overdirive the unit and it flattens out losing much of its tone color and dynamics.
Headphone listening came with the same positive benefits mentioned earlier.
I did limited listening Bluetooth with mixed results. (iPhones earlier than 6s do not take full advantage of the AptX wireless streaming, so I cannot fairly comment.) Some music sound great as if coming right off the digital interface other music sounded very limited and grainy like most MP3 or MP4A out of the box where cymbals sound like peas rolling in a tin can - sorry. I think its more of a "format" problem.
Overall, a well designed execution. Monoprice does not need to inflate the power spec, this unit sounds absolutely wonderful when operated within its limits.
This product is musical, amazing at this price point and highly recommended as a desktop, bedroom, dorm-room music player.
PROS: Sound quality - a glimpse of tube heaven
Affordable and easy to find replacement tubes
Great "desktop" and headphone amplifier
CONS: "25 watt" naming is modestly deceptive
Clunky power switch
Plastic protective covering on "VU METER" impossible to completely remove
Volume does not completely mute signal through CD source
The bad, in ascending order:
My refurb unit had an occasional light hum, but it could only be heard if you weren't playing something. Non-issue for me, but for some, this could be a problem.
Clips at half volume. But this was setup for a bedroom, so the output was acceptable.
The right channel kept going out. I tried different speaker cables and cleaning the terminals, but no joy
I could've sworn that the unit had a 30 day, money back guarantee, but MonoPrice is only offering me a store credit.
PROS: If not for the failure of the right channel, I would've been singing the praises of this amp
CONS: Clipping at half volume and failure of the right channel
PROS: Sound good, simple and easy to pair up. Doesn't take up much space and look good.
CONS: Broke in 6 months of little use. No more sound from one of the speaker channel.
However - of course there is a however - in the last month problems have started to develop with the amp. The bluetooth will stutter after an hour or so of use. Mostly it just drops audio for a second at a frequency of around two minutes, but every now and then it disconnects completely then reconnects to the Mac Pro with a "your phone is connected" message. Turning the amp off for a few minutes then back on will make the problem go away... for an hour or so. I've turned off the BT on my phone and tablet, to no avail.
To get around this I plugged in a cable from the Mac Pro to the CD inputs on the back of the amp. No good within seconds a background hum starts that builds in volume past any comfort levels. This is the same cable and sound port on my Mac I used for my old amp, so I don't think that's the problem.
Then the power button fell off.
Based on other reviews it appears the unit quality is hit and miss. Mine missed.
PROS: Full bodied sound
CONS: Bluetooth problems, growing background hum for cabled input, quality of parts
PROS: - Sound Quality
- Solid build, quality construction
- Attractive looks
CONS: - Side panels fingerprint easiy
Sounds awesome, looks to match. If you're looking at this, it's because you want one just buy it and start enjoying your music again.
PROS: warm tube sound, great looks, well packaged, incredible value, simple Bluetooth connectivity.
CONS: gloss black shell can show finger prints (so stop touching it!)
tubes get warm (as expected so let the thing breath and don't touch em!)
has a bit of a hum
Low power consumption
More power than with small-signal tubes alone
CONS: Works most efficiently with ~4 ohm speakers
The "ray gun" rings around the tubes may not be for everyone
Speaker connections don't give much room
I use a cable from my laptop whenever I can, and bluetooth from phone works pretty well, though not as impressive. However, shockingly better than phone going through bluetooth to a standard amp.
Words of caution though: 20 amps per channel is not a huge amount of power, and i have it turned up almost all the way. My speakers must be about 89 dB sensitivity, and I would be cautious if yours are less than that. Doesn't seem to clip at the top end though.
CONS: rite my experi
Contacted Monoprice and they were quick to issue an RMA and the bad unit will go back on Monday. Hopefully, a replacement unit will ship soon. I'm looking forward to connecting this to my Bose 141 speakers.
I'm giving a 10-star review because of Monoprice customer service. Outstanding, so far. Once I get a functioning amp, I'll review it based on performance.
PROS: Looks nice, but don't know about the audio quality yet. Monoprice was quick to do an RMA. So I hope to have a replacement amp soon.
CONS: Arrived damaged.