Sunbuck Small Stereo Amplifier, Stereo Receiver with Bluetooth, Optical/Coaxial Jacks for TV/CD/DVD/LP/PC, Support 192kHz Audio, Max 300Wx2 Power, Home Audio System, Receiver for Speakers, AS-25BU
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Availability:
In Stock.
Arrives
Wednesday, Jul 22
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Features
- Perfect Sound Quality Experience: The AS25-BU stereo amplifier upgrade the audio processing chip to support 192kHz audio signals. The low distortion and low noise enable you to relish wonderful music at all times
- 300W Power: After upgrading the transformer of the audio amplifier, the power output is increased without reducing the sound quality. The power amplifier provides you with a maximum power output of 300Wx2 (RMS 50w 2), suitable for indoor offices, garages, bedrooms, as well as outdoor balconies, gardens, and swimming pools.
- Optical/Coaxial Jacks: The digital amplifier can be connected to TV, CD, DVD, computer, record player, smartphones, iPads, laptops, projectors, etc. Support RCA input, USB2.0, SD card, Bluetooth 5.0, FM radio. It enables you to build a high-quality 2.0 CH audio system for seamless connection between devices
- Bluetooth 5.0 Wireless Connection: The bluetooth amplifier is equipped with Bluetooth music streaming with a wireless range of 40 feet / 12 meters or more. (NOTE: Signal and volume may be intermittent if there is a wall blocking between the Bluetooth device and the amplifier. Please pay attention to the distance used!)
- Small and Easy Operation: The stereo receiver has a very mini footprint which is ideal where space is at a premium. Recommended for home audio, computer game audio systems, tower speakers, garden speakers. With bass and treble control knobs you can set the desired output of music according to your wish
Brand: Sunbuck
Connectivity Technology: Bluetooth, Optical/Coaxial Jacks, RCA, SD, USB
Controller Type: Push Button
Special Feature: Built-In Bluetooth, Optical/Coaxial Jacks, Support 192 kHz audio
Compatible Devices: DVD, Game Console, Personal Computer, Smartphone, Television
Connector Type: Optical/Coaxial Jacks, USB Type-C
Audio Output Mode: Stereo
Surround Sound Channel Configuration: 2
Color: Black
Product Dimensions: 6"D x 5"W x 2"H
Connectivity Technology: Bluetooth, Optical/Coaxial Jacks, RCA, SD, USB
Controller Type: Push Button
Other Special Features of the Product: Built-In Bluetooth, Optical/Coaxial Jacks, Support 192 kHz audio
Compatible Devices: DVD, Game Console, Personal Computer, Smartphone, Television
Connector Type: Optical/Coaxial Jacks, USB Type-C
Audio Output Mode: Stereo
Surround Sound Channel Configuration: 2
Output Power: 300 Watts
Wattage: 50 watts
Number of Channels: 2
Output Wattage: 180 Watts
Control Method: Remote
Audio Output Type: Speakers
Wireless Technology: Bluetooth
Format: WAV, WMA
Brand: Sunbuck
Model Number: AS-25BU
Manufacturer: JS Electronics Limited
Mfr Part Number: AS-25BU
Warranty Description: 3 months
Built-In Media: Antenna, Remote Controller
Item Dimensions D x W x H: 6"D x 5"W x 2"H
Item Weight: 1 Kilograms
Color: Black
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Jul 22
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Surprisingly good for the price. The only thing missing is a headphone jack but...it's a little power house and well drives my bookshelf speakers. It has presets and the Bluetooth connects easily and as expected. I'm going to mount this under a top cabinet in the kitchen. Don't expect much from the manual as it is written in very broken English but you can still figure it out. It also comes with a standard AC cord so you don't need to fuss with a DC wall wart. It comes with a small remote as well. You can't go wrong for the price. FYI - In the rating questionnaire it asks about "Sheerness". I have no idea how that applies here. P.S. - I have a few additional comments regarding this item after reading some of the other reviews. 1. Quality - some folks have had issues after running the system. Since my review was written days after receiving it, I can't comment except to make sure you put it in a location where airflow to the unit is not blocked. So far, my unit is not getting hot. 2. Sound quality - Folks, this unit costs $45 dollars. If you are and audiophile and into studio quality sound, then I think you are expecting a bit much for $45. I'm a music lover and it sounds plenty good enough for me. I've listened to YouTube music videos and some FM music stations and it sounds pretty good to me. It does go louder than I need and I get some decent full bass sounds from my bookshelf speakers. If you expect 130 db rap or pounding rock or the fine nuances and dynamic range of the 1812 Overature, then this unit might be for you. But aside from the long term potential quality issue, I'm quite pleased with the unit. If you are happy with the quality of music over your cell phone, this will do just fine and my wife is happy listening to Bocelli over this unit. So, since I've already belabored this issue, I'll repeat, for $45 you get a very small unit that sounds pretty darn good. Oh, and yeah, the controls seem a bit weird at first but since the unit is small, 20+ buttons simply won't fit on it so they've overload some of the buttons with more than one function which is not big deal after 10 minutes of acclimation. And then there's the remote. The first time I tried it didn't work either but just press the button a tiny bit firmer and it works fine. Lastly, if you plug this into cheapo speakers, it will sound crummy. Buy a $1000 receiver and plug it into a $99 dollar speakers, it'll sound lousy. So make sure your speakers match your sound expectations. The End
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Reviewed in the United States on December 27, 2020 by And6
I purchased the "Sunbuck Wireless Bluetooth Stereo Amplifier System – 180W Dual Channel Sound Power Audio Receiver w/USB, SD Card, FM Radio for Home Speakers (25BU)" after reading reviews and finding the features ideal for my home installation. It has a very small footprint which is ideal where space is at a premium. Controls are simple and intuitive. Knobs for volume, bass, and treble operate smoothly and precisely. The remote works well, but its diminutive size will encourage getting lost. I find the connections and construction to be of surprising quality for such a value added amplifier. I drive two Wharfdale Crystal 10 bookshelf speakers, which it handles with ease. My inputs include a CD player and Bluetooth sourced from my phone. Sound quality and Bluetooth connectivity are excellent. It would be nice if the antenna was a post style rather than the wire style, as FM reception might be improved. Speaker connections are of the spring loaded variety and grasp wires securely. USB and SD inputs are nice although I have yet to utilize them. The unit is very attractive with a screen and volume illuminated by a neon blue hue. All in all, the amplifier is a very nice surprise and exceeds my expectations. I can't speak yet to longevity at this time, but hope it is of equal quality. I should mention that the Sunbuck and Pyle brands appear to be related, as the equipment is identical with the exception of branding. I would definitely purchase these products again in the future and recommend them without reservation.
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Reviewed in the United States on March 24, 2021 by Vetterun
I bought this to power some extra bookshelf speakers I have in my basement shop. My speakers are wired back to this unit. I connect to the unit either directly from my phone via BT (connects fast and works reliably) and I have also have banana plugs (1 to 2) running from the output of my Alexa echo to this unit. So I can either tell Alexa what to play and it plays through this unit by switching the input, or via my phone's BT. My speakers aren't great, so it's hard to comment on the power delivery or sound qualiity, but it's decent for my use. The only thing I don't quite undertsand, and which would be helpful, is to have it mountable. There are rubber pullout handles on the front, similar to what you'd expecte from a rack-mountable unit, but I don't see any way to rack-mount this, or even a housing small enough to do so.
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Reviewed in the United States on July 9, 2021 by Amazon Customer
Excellent investment if you're the guy who needs tunes in shop and doesn't want silly wireless, must be recharged speakers. Hang up regular wired speaker's in your shop or garage. Buy this and you'll be set. Fm radio,or play tunes from phone via Bluetooth. The remote actually works and quite well. The cons: the blue screeb is extremely hard to see or read from more than a few feet away. The remote is extremely thin and cheap- be careful. Will this thing produce 180 watts...No way and not even close. I'd guess 40-50 watts and that's more than enough to power and few speakers in a shop. The unit itself- clearly cheap and built cheap. It's a set it and use when needed item. Will last a long time. Oddly you have a two power options. Power off on remote leaves volume light on. Power switch on back of unit shuts entire thing down. I tested this thing tonight as I was looking forward to it and it honestly met my expectations. I like it. As a bonus. I managed to walk about 40 feet away with phone in hand before Bluetooth connection dropped. Nice.
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Reviewed in the United States on August 3, 2022 by Mike Fowler
I really wanted to love this thing. It's so cheap, and it has so many features, but the implementation is . . . odd. For example (and I have several examples), there's a power switch on the back of the unit (on the BACK?) and a power on/off on the remote, but the remote will just turn off the sound; the unit is still lit up. And the remote can't do anything if the power switch on the back is off. Most irritating (so far) is the volume control. There's a knob on the unit and two buttons on the remote, but the remote can only turn the volume up to where the knob is set, and if you power off the unit, it forgets where you've set the volume using the remote, so it can suddenly turn on startlingly loud. At this price, I'd assumed it was a Class D amplifier, but it's larger & heavier than the little Class D amps I've seen, and it has a lot of ventilation holes, so there may be some A/B going on. The vent holes make it less-suited for outdoor use, which is where I'd intended to use it, but not a problem inside and still much smaller than a traditional receiver. It sounds good, and the bass & treble adjustments are particularly useful with cheap speakers. Much later: I was using this in my garage and I decided to upgrade to a Douk Audio ST-01 Pro, which isn't high end but it's certainly well-respected and costs 3X the Sunbuck. Out of curiousity, I set them up for a fairly rigorous comparison using a switch and a good set of speakers (Elac Uni-Fi 2.0), and using USB drives as the sources for both amps. The Douk looks much cooler and is less irritating to use, but for sound quality, the two were very, very close. I thought the Douk was a slightly richer, particularly with female vocals, but I may have been fooling myself. So, sonically, I think the Sunbuck is surprisingly good and punches way above its price.
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Reviewed in the United States on May 29, 2023 by M. Miller
As I was playing with this unit, I kept saying to myself "I can't believe it was 40 dollars!" While I did not expect Harman-Kardon or Yamaha quality, I was surprised with the sound and features of this product. The famous Sunbuck(?) brand exceeded my expectations...by far. I had just re-foamed my 30-year-old Mini Advent speakers' woofers to put them in the garage. I needed something to play music and couldn't pass up a $40 amp with all these features. I hooked it up and started blasting away. The sound quality and volume were more than adequate for the 5-inch woofer and 3-1/2 inch tweeters in the Advents. (In fact, I didn't want to push the volume too far because I was afraid I would blow out the speakers.) I don't know how it would sound if I hooked it up to better speakers (and I might try that), but what I heard is much better than I was looking for to play music in my garage. Even more surprising, however, is the FM reception. I wanted a Bluetooth music system in my garage because we live in a valley and FM reception in the garage (and the house) is horrible unless the system has a good dipole antenna. Just for kicks, I tried the FM in the garage with the little wire antenna on the back of the receiver still wrapped up. The auto-search found 16 stations, 13 of which were actually radio stations! And most of those 13 stations came in loud and clear. The FM tuning function is a little clunky because, once you store stations in the memory, it seems like the unit thinks you want to listen to only those stations. A tuning knob would be nice, but would probably blow through the $40 price tag. The tuning function is an inconvenience, at worst, but not a flaw. I am intrigued by the DC input, also. I think it is begging me to get a DC power cord so I can take the receiver and speakers with me "out in the field". Much like the FM tuner, DC input was not something that was required for my purposes, but having it just expands the usefulness of this receiver. It's always nice when a product gives you more than you expect.
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Reviewed in the United States on January 31, 2020 by Steve K
Lasted about nine weeks, suddenly there's a large hum on one side of the receiver (other side is just fine, when you swap speaker wires the hum switches speakers). Manual is useless for troubleshooting. Can't return because it's juuuuuuust past 60 days. While it worked, worked pretty well. I needed an inexpensive receiver to drive sound to some speakers in the workshop, this did the trick...until it didn't. Less than impressed with its reliability.
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Reviewed in the United States on September 3, 2025 by ANONYMOUSAMAZONCUSTOMER
I bought this amp in an experiment to create the lowest cost possible studio monitor setup. Most audiophiles in the music mixing/production world would scoff at my creation. I often shop at consignment stores in my city where I always can find old speakers for next to nothing. In this case I found 2 speakers, made by Sharp. 4 ohm 100w/200w max each. I gave $2.12 each for them btw. I bought the AS-25BU amp for the left and right inputs in order to send signal from my audio interface. I cannot believe how crystal clear the sound is. I had to shape the sound with the bass and treble knobs until it equaled the tone of my nice studio headphones. Sending 90w to each 100w speaker is like magic. I can crank the volume up without once ounce of hiss from the speakers. I now have convincing looking studio monitors that give me the clarity I need in mixing tracks outside of my headphones. This thing gets incredibly loud. Plus: FM radio and Bluetooth to boot. Super happy customer.
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Reviewed in the United States on September 16, 2020 by Daniel Pinson