- Fosi Audio LC30 VU Meter Amplifier Speaker Selector Switch Box Audio Visualizer 2 in 2 Out Vintage Switcher for High Power Stereo Class A, B, AB, D, Tube Amps Home Audio Component with Remote Control

I’ve been an audiophile and techie most my life and love testing and comparing equipment especially since my first job as a teen where I had access to a room full of audio equipment with switchers to let customers hear the differences. But since those days, I’ve mostly had to rely on memory when trying to compare my own equipment. I have also always been a fan of the vintage and high end feel of analog meters. I never thought to buy a separate switcher or meter because it seemed impractical but here comes Fosi to solve those two things in one, high-quality, efficient and affordable product! I first learned about Fosi a few years ago when I was looking for a solution to put some extra speakers I had to use in my bedroom with emphasis on getting the best sound I could and also modern flexibility to use with my TV and streaming from other devices. After looking at a lot of options, including high end streaming amps and smart speakers that all didn’t seem good enough for the price they were asking for, I came across the Fosi T-20 which seemed too good to be true but I took the risk and haven’t been happier since. I’m getting better sound than most the other options I looked at for a fraction of the price and I even have a cool hybrid tube amp that fulfills the desire I’ve also always had for tube equipment. When hooking up this amp for the fist time, I tested it with all the extra speakers I had to see which ones matched for the best sound but being impatient with having to switch wiring every time, I didn’t do more than one quick listen with each one to decide and left it at that. Since then, I’ve felt I could improve my sound systems everywhere with Fosi equipment so I’ve been checking them out and mainly focusing on their amplifiers until I heard about their new DAC that just came out and then read the features of the LC30 when I was browsing their products. I could use it to give my speakers a true A-B test and add a cool meter to my T-20 at the same time! First thing I noticed when I got the LC30 was the quality, protective packaging to make sure the item inside was unharmed from shipping. The item itself is very cleanly designed and feels solid. Setup and operation is simple and straightforward and it’s nice they used all the buttons on the kind of generic remote to give you different ways to change the settings. I don’t have a tool to test how accurate the meters are but they seem to work fine and let’s face it, it’s just fun to watch the lit up meters dance while your system is playing. For those who have the tools or desire, it’s very easy to dial in the sensitivity of the meters although I don’t think you can set it for two different amps at the same time since there is only one analog dial but that hasn’t come into play for me yet as I’m only using it for one amp at the moment. Switching speakers is seamless with no pop, click or anything else jarring. It just switches flawlessly between my two setups and I can finally give them a true comparison which has already been a very revealing experience for me. I did notice that overall output is decreased slightly with the LC30 between the amp and speakers but that was to be expected and I never listen at full volume anyways so there is still plenty of headroom to work with. Overall, the LC30 is a great addition and tool for me to finally have again as I almost forgot how invaluable it is to be able to switch equipment on the fly. Right now, I have my two top contending speakers set up so I can just switch whenever I have a feel for hearing their different signatures or when one is better suited for the content I’m listening to and it’s another benefit I never gave much thought to having in my audio systems. Highly recommend and I look forward to adding more Fosi products to my systems!

I was looking for an amp selector to change between amps and compare sound using the same speaker when i came across this unit. This unit is for a very unique needs, offering a UV meter with the added value of having 2 amps and 2 speakers to change between while not having to get up, change the input and then sit again to compare the sound- thanks to the remote control. Value- this unit is not cheap for a speaker selector, but with the added VU meter it is a great solution. Built- its solid, has a nice weight to it and the meter is responsive with a nice yellow light which has 4 brightness levels (you can change it from the control) Functions- VU meter, 2 speaker level amp inputs and 2 speakers level speaker output. The unit also has a sensitivity wheel which you can use to calibrate the unit for DB and watt output. (Sensitivity wheel is not changeable from the remote control). Overall i am happy with this unit, even if i no longer change between amps, i have this unit if i ever want test another amp. For now, my only use is as a UV meter to keep an eye on my noice level and dynamic range of a son when comparing streaming services and different pre-amp modes. If you want to calibrate this unit, you have to get a multi-meter with DC amp reading (at least 5A) and DC volt using a steady sound source to measure resistance and voltage which you then multiply to get a Watt value. Amp x voltage= Watts

A comparator for a pair of speakers and amplifiers as good as an AXB box. Noiseless. Rugged. Very good sensitivity knob. If you know about SPL, very useful, if not absolutely accurate. Brightness control from maybe too bright to retina burning. Needs work there. Overall, an absolutely awesome addition to any nice stereo rig. Kids giggle when they relate the music's rhythm to the dancing pointers. Best toy/tool for music lovers.

The FOSI LC30 has excellent build quality that will look great in practically any system configuration from mid-fi and up. The remote comes in very handy when sitting in your listening spot if not near-field; especially as the print on the front of the unit is smallish and muted (likely on purpose). The VU meters have their own sensitivity setting which is a plus for protecting them (as appropriately stated in the manual) but I wish the sensitivity would automatically adjust with the volume setting on each amplifier. Connectivity is straight-forward if you don't cross the any of the positive and negative speaker wires. Use clearly identifiable speaker wire, I did not and one of my amp kept going into overload until I fixed the wiring. The manual is good but brief and could benefit from more information; such as making sure wire polarization is connected correctly for best sound and performance. The adjustable brightness on the VU meters is a very desirable feature for night listening vs in broad daylight, or somewhere in between! My unit came with a USB C cable but no 5v adapter so I used the one from my phone; the adapter should be included. Overall, I really like the LC30 as I have multiple sets of speakers and amps and this really facilitates comparison tests. My biggest recommendation for a future version would be the addition of a source input if possible. That way two amps could be compared via the same input source without adding another variable. I'm enjoying the LC30 very much.

I only use this for the VU meters but it looks and works great. Very happy with purchase. Fosi makes some nice stuff.

If you want to switch speakers and amps to compare sound it's a good unit. As a power meter it is useless, it doesn't show accurate power readings. You have to adjust the levels every time you change the volume on your stereo. The build quality is very good.

A perfect device for meeting my requirement. Standard build quality.

Très belle qualité, c’est exactement ce que je cherchais.

the indicators don't move with love volume listening despite the knop set to max. besides that, It's perfect. I will pro return this to a more sensitive unit. the light is also too bright even at the lovest setting.

Great for switching 2 amps between ne set of speakers - Got two Fosi BT20A single source amps. Needles are totally inaccurate though, and the volume does need to be up a bit to even get them to move, but they're a nice enough addition. For an amp switch, it's perfect

Ottimo apparecchio, lo consiglio per chi ha da attaccare do amplificatore su una coppia di casse praticamente uno switch bidirezionale