Tube Amplifier, Stereo Vacuum Tube Class A/B Amplifier,Integrated Amplifier with Bluetooth 5.0,Subwoofer Output, Headphone Output, Record Player Phono Preamp and USB DAC

ALL in All folks great little Hibrid amp for my office. plugged it in for 48 hrs before listening to the amp.(tube break in time) had it for a month and it just gets better. (about 200hrs now). head phones sound really good thru PC/USB (Meza 99 classics). also passive speakers are realistic AV7 & mini sub 8". nice open and airy sound stage from this little amp. Enough for the office.

Tiene buena potencia y estéticamente muy lindo buen sonido

the advertising is not true , I was to belive that this is a tone amp , nothing was mentioned that the out put of the amp was power transistors two per Chanel . had I known this I would HAVE NOT PURCHASED this amp. I wanted an all tube amp but this is NOT . I will say that the sound is good but not what I bought .

Sent two separate units from Amazon. The VU meters do not actually work. They light up but do not move. Seller says they should work when you connect any sound source. I tried multiple sources and the meters never move. Sounds ok but the meters should actually move and not just light up.

The amplifier has a good set of connection options and a warm tone. I have used bluetooth successfully. I initially experienced distortion after plugging my record player into phono but I suspect this may be due to the fact the record player has a preamp. It sounds wonderful run through the Aux input. The unit is built well and has a nice warm tone. I am powering some Klipsch B200 bookshelf speakers in a large room. I haven’t dared push the volume to the point of break up as it was well louder than I would listen. I went up about 1/2 way on the volume. I have not felt the need to add a subwoofer.

This tube amplifier packs a powerful punch with its dual toroidal transformers, which operate at high voltage and low current. Each operating point is exceptionally stable, minimizing the risk of spurious oscillations and ensuring that there's no transient intermodulation distortion in open-loop operation. The four-tube amplification stage is rock-solid, with fewer components involved, delivering a purer signal to your speakers. The design is also refreshingly simple, eliminating the need for complex compensation and feedback circuits.

This tube amp is a work of art with outstanding acoustic performance—it sounds like a time-traveling singer bringing your favorite music to life perfectly. For me, it's beautifully designed, elegant, super easy to set up, and it drives my JBL L52 speakers like a charm.

Over the last year I got the HiFi hobby bug and have picked up several integrated hybrid amplifiers, and they always seem to miss the mark. Either their not powerful enough, or lack headroom and dynamic range, or lack features, like no sub-out, poor Bluetooth implementation or other issues, but sometimes you find one that has the perfect balance of quality, power and features, and the CrBoke CR333 Class A/B tube amplifier is one such product that over delivers!The box weighs a ton! I opened it to find the amplifier well foam padded, and inside of that is a very nicely presented high end cloth drawstring bag. Opened that to find the amplifier very well packaged. It includes a small very basic manual, RF antenna, and the AC power cord. No wall wort here folks! This has a built-in power supply, and it's switchable between 110AC and 220AC, so it should work just about anywhere with the correct plug.The amplifier looks great, two amber colored LED backlight VU meters on the front, with a volume knob and a 1/4" headphone jack (yep it has a headphone amp too and it works great on my HiFiMan magnetic planars!). On the topside in front of the tube cage it has tone controls for treble and bass, and the input selector buttons. Behind the controls is the tube cage which houses four vacuum tubes which are part of the preamplifier stage that is feed into a Class A/B power amplifier. One could probably roll the tubes with higher quality tubes if available for even better sound.On the rear panel we have four 5-way speaker binding posts, PC-USB, Digital Coaxial, Digital Optical, analog RCA, phono stage input, and subwoofer RCA LFE output, and a 3.5mm headphone jack on the rear.They advertise it to be 100 watts output, 50W x 2 at 4ohms. I have a pair of high end Swans Speakers 3-ways that are 4 ohms, and although they sound great with a lower powered amplifier, higher powered amplifiers will really bring them to life, and this amplifier sounds absolutely terrific powering these 4 ohm 3-ways.I tested the phono stage with the new Audio-Technica AT-LP70XBT-BZ turntable and it works great with the CrBoke CR333, the audio is nice and clear, and the amp is dead silent, even at max volume when not playing a record, very impressed!I tested the Bluetooth with Amazon Music and Tidal and it works great. Easy to connect to, and reconnect to. Good distance, approx. 50'ish feet or so.Some owners of HiFi equipment with built-in Bluetooth have reported RF noise issues with the small fixed position L shaped antennas, and have either relocated them with extensions or come up with some other solution when all that was really needed was a higher quality antenna that can swivel AND pivot so you can adjust the RF pattern. I was able to replicate one RF issue on an amp using the little L shaped antenna and it was resolved by simply using the better antenna. The good news is that this includes that better antenna.I'm impressed that this has a subwoofer LFE out as well, although it's unclear if it's full-range, or if there's a high-pass filter, although that can be set on the active sub, so probably a non-issue for most.The only thing that would make this integrated hybrid amplifier perfect would be if it came with a remote control (a bit surprising it doesn't given it's price point?) and the ability to adjust the subwoofer out crossover, but it's darned close to being perfect!Overall this amplifier far surpassed my expectations, and I'd have no qualms about recommending it to anyone looking for what appears to be a high quality integrated tube preamplifier with a Class A/B power amplifier that sounds great and is feature packed!