Fosi Audio P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum Pre Amp Receiver with Bluetooth aptX LL HD Bass Treble Tone Controls for HiFi Stereo Active Speakers with RCA AUX Jack

Amazing sound.. Connected with by Bose CineMate as pre-amp and output is amazing.

Good sound quality. Could be better amplified..

I have been following fosi products. There are mixed reviews on Reddit and youtube some just branding it as cheap chifi setups. I wanted a Bluetooth transmitter and I was eyeing on fiio but that was costly so this was another option. I didn’t need an amplifier though. So this preamp was a good option. I personally like old vintage songs and warmth. So tube amps were a good option for me. The only question was whehter the build quality and sound quality would be good?Once I received, I connected it to my studio monitors and I could understand the warmth from the tubes. Then I listened to it by connecting on my IEMs, warmth is noticeable. The music becomes more enjoyable to hear. Soundstage is not that wide. But the bass and treble controls are really nice. Bass noticeably gets boosted at 12 o clock position.The volume button increases non linearly. It has enough amplification for IEM that I never get past the 12 o clock position, so I guess it would be able to drive full sized headphones also. One con would be when there is no electricity and when I play it on the inverter there is a hissing sound (some kind of weird earthing issues Iguess, because same thing happens for my studio monitors also)Conclusion - it has impressed me with the sound quality and build quality. Maybe better tube amps will be out there but this one is a good starting point.

Value for money

Just mind blowing change in sound quality .. previously I was using cheap bluetooth dongal with my sony amp.. but after installing this the sound quality change like day and night.. tone control is also decent ..also little bit expensive , Note: I am using sony hi-res amp and bluetooth connected with apx-hd .. make sure u have have good equipment to get good result .. !!

The media could not be loaded. Small, built well and a no nonsense preamp with bluetooth. Treble bass controls could have been bigger with better feedback. And the off function should be in the middle that way I can turn on off it without going through multiple clicks. It matches well with my A07 max and A5 pro

Truly does it's job as a Pre Amp. Very warm sound.

I couldn’t fit the tubes into the slot so had to return the product. I noticed others had similar problems but was hoping this would not be the case with my product. this is disappointing.