FosiaudioReviews of fosiaudio.com

Exeptional value, super transparent flow, gain is being provided as it is needed Thank you fosi

I wasn’t familiar with FOSI when I decided to move away from my old sound setup and build a new one. While searching for equipment, I came across the Audio Box X4 preamp. It caught my attention because it is tube-based, and when it arrived, was able to confirm the product’s quality. I found the sound to be incredible, and really appreciate the ability to swap the tubes. I would also like to highlight FOSI’s excellent post-sale customer support.

Had an issue with my kinda new Fosi i5 headphone. The right driver had some distortion to it and reaching out to their support was helpful. First they provided me with instructions to figure out what the issue was and patiently guided me through the process. Ended up sending the faulty headphone back and received a new one and didn’t pay a cent. This is how support should be done.

Couldn't be happier with my experience with Fosi Audio. The ZP3 preamplifier is fantastic, and the support from the team was equally impressive. I reached out with questions about op amp upgrades and received prompt, knowledgeable, and helpful advice. The unit arrived quickly and has performed brilliantly. A sensational experience from start to finish. Highly recommended.

I own the ZD3 and I'm really pleased with the sound quality of this DAC. Thinking of rolling the opamps but I'm not sure yet, the stock ones sound really good. It's a very good DAC for its price. Recently I got the P3 but the tubes weren't matched and the stereo field was uneven. I contacted the customer support at Fosi Audio and they responded within 24 hours. After explaining the problem they send new tubes without any trouble. The tubes only took one week to arrive. This unit sounds good, the tone controls could be better but for this price you can't really complain. I'm going to roll the tubes with better ones and then it will sound even better. Fosi Audio isn't high end audio but to me, as an audio engineer, it comes close and it sounds really good for its price. Customer support was excellent. I'd recommend Fosi Audio to anyone who doesn't want to break the bank for getting good sound and some of the Fosi Audio gear sounds even a bit better when you make little upgrades like replacing tubes and or opamps.

Got my ZD3 recently and love it! The sound via the DAC compared to my previous 3.5mm jack is unreal. Love listening to music, drum and bass in particular and my partner has also noticed how much better it sounds. I set the ZD3 up and by coincidence an issue with my Klipsch stereo appeared at the same time. Nothing to do with the ZD3 (confirmed now!). Fosi Support were magnificent. Several days of help with drivers and firmware while I was convinced the issue was not with the stereo. Long story short Fosi team went above and beyond to assist and after days of assistance I figured out the Klipsch system was the issue after all. I cannot understate how good the Fosi team were and how far they went to help. Totally gold star stuff.

I have recently started purchasing FOSI audio gear for my new house which has a dedicated music room and I wanted to add to the Aesthetics. My kit included Krix Harmonix speakers, Paradigm subwoofer various amplifiers, CD players and streaming devices. No issues with sound quality, just big cumbersome and ugly. I had seen plenty of reviews and based on specifications and some video reviews I decided to dip my toes in the water. I started with ordering 2 x V3 mono blocks but inadvertently ordered 4. To this original order I added 2 x visualisers, 1 x P4 pre amplifier 1 x Zd3 DAC and 1 x Small Audio Rack with the 2 Cooling Fans and plenty of their cables. WOW Big clean and crisp sounds from the moment the components came out of the boxes. I was impressed to say that the smart reviewers had got it right performance, quality and Aesthetics in small firm factor and for superb pricing. 50-100 hours later of referencing my go to audio tracks on Cd, streaming services and my networked lossless audio collection from the QNAP on the network. I was overly impressed by the results. My only decision was that I should have purchased the ZP3 based on the balanced outputs and nowhere could I plug in and test my vast array of headphones. So I decided to contact the support team as I was frustrated that the products could be purchased from multiple sites, varying prices good discounts, shipping costs from overseas from some suppliers and it was annoying to say the least. Summer from the support team was prompt and efficient and we were able to work out a plan and I couldn’ be happier. Such a knowledgabke team member who made this process of upgrading and her recommendations in relation to future proofing my system and allowing for further growth. Adding to my collection, we arranged to purchase the SW10 subwoofer, the ZP3 pre amp the ZH3 the BOXX5 phono preamp ( in anticipation for the release of the turntable later this year). I added the another Audio rack, 2 more visualisrs, and the 2 visualiser the DS3 portable DAC , the IM4’s in ear monitors and the Jewel in the crown, yes another pair of headphones the I5 open back Headphones. All that is missing from the media room is tfe CD player due out later this year. Products arrived promptly within a week in 3 Seperate parcels all well packaged, no damage and track and trace capabilities on all. So I reconfigured the setup and then in the new office I setup the other V3 mono blocks the P4 a Rotel RDD06 DAC and a reference quality Sony CD player. Now I love the Krix Speakers but the whole world changed upon connecting the I5 Open back headphones. Putting them through their paces 9 hours slipped by and I couldn’t fathom how the combination of source to DAC to preamp to headphones could deliver such amazing results across multiple genres of music. Nothing ventured nothing gained, do yourself a favour and if you are considering some new audio products thst won’t break the bank but will provide endless hours of pure joy listening to your favourite tracks then you seriously can’t go past FOSI and the dynamic range of products. Unsure about your wants vs your needs, then contact Summer as her courtesy and knowledge will steer you on the right path, Regards Shayne

My experience with Fosi Audio’s customer support has been very positive. I explained the issue with my V3 Mono amplifiers and provided photos and videos. Their support team quickly identified that the problem was caused by the splitter used to power two V3 Monos with a single 48V power supply, and they immediately sent me a replacement. Everything is now working perfectly. Thank you, Fosi — your amplifiers are absolute beasts!