7/25/2023 0 Comments Beyond hello promo codeYou normally wouldn't expect to get more power with a 48 volt supply compared to 32 volt when their current ratings are the same. Let's see how much power we can get out of this little box into 4 ohm: Multitone and 19+20 kHz show good performance for the class: You can counter with EQ (which you better have for good sound in your room). In English, this means that depending on which speaker you use, the sound may be a bit bright or a bit dull if your hearing extends to 20 kHz. Noise performance is also quite good for the class, almost clearing the hurdle for 16 bit content at just 5 watts:įrequency response shows load dependency which all class D amplifiers in this price range show: Notice how many amplifiers it beats to the right of it! This is well above average for all amplifiers tested: So let's start with our usual dashboard:ĭistortion is nicely kept to -100 dB so we are noise limited causing SINAD to land around 88 dB. I performed the low power tests using the 32 volt supply. The protection circuit was the best kind with high tolerance of clipping and audio-restart. Despite me pushing the amp to max power repeatedly, it just got warm to touch. But if you are, this you can remedy yourself. There is no thermal grease but the amp ran cool enough that I don't think you need to worry about it. For now, a large aluminum couples the amplifier IC to the case. I will post the pictures of the insides later. Suggest company use a different material to fix this. The sound I was hearing was it moving just a hair up and down and hitting the top of the case. No harm though as the cap is laying on its side and can't go anywhere. The putty used is to keep the cap glued to the PCB was too flexible and had broken loose. Turns out one of the two large power supply caps had lost its adhesion to the PCB. Fearing the worst, I took the unit apart. When I took the amplifier out of the package, I noticed something rattling in there. There are replaceable op-amps for those of you who have nothing better to do than mess with the design. The amplifier is based on TI TPA3255 class D amplifier IC. Yes, it is a larger supply but you are going to hide it behind your desk anyway so might as well live the good life with the increased power there. Power supply is external and as noted, you get a choice:Īs you will see later, you really want the 48 volt version: There is a $10 discount coupon right now.ĭespite its budget price, the V3 manages to look elegant with the hole pattern on top and large and smooth feeling Volume/On/Off control. Price goes up to $109.99 with the 48 volt supply. It was sent to me by the company and costs US $89.99 with stock 32 volt supply. This is a review and detailed measurements of the Fosi Audio V3 stereo amplifier. Thank you for your time, I hope you can help me with the choice, any comments are welcome. To the input I would connect a DAC Fiio KA5 dongle, or Tempotec HDII (humbly it is what I have) playing only music in high resolution MQA and Flac. in the future some second amplifier only for sub woofer. I plan to connect them to two 3-way boxes with speakers, if possible of medium or high sensitivity, perhaps the bass design is with reflex. The premises would be a balance between power, distortion, quality and theoretical duration of components. Its use would not be for such an audiophile environment, if an advanced and growing listener. regarding the latter I'm still not sure what "load dependency problems" means and how I could minimize that (I have to translate all ASR content to my native language) sorry. Let me tell you that I am in a position to acquire a Fosi amplifier and I would love if you can help me decide between the BT20A Pro and the recently reviewed V3. Hello everyone, I would like to thank Armin for this review of V3 and you for your instructive and enlightening comments.
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