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
Original price was: $159.99.$134.99Current price is: $134.99.
Price: $159.99 - $134.99
(as of Oct 16, 2025 16:44:53 UTC – Details)
Product description
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Reviving the Classic Vintage Charm Merchant Video
Retro Design, Pure Sound
Effortlessly Switch Between Two Sets of Amplifiers/Speakers
The LC30 was specially developed to cater to our audiophile fans‘ requests to complement your home audio system setup. It can serve as an amp/speaker selector or a pure VU meter allowing you to enjoy the vibrant audio-visual feast.
Supported Amplifier Types: BTL, Class A, Class B, Class AB, Class D and tube amplifiers, etc.Maximum Power Support: 250W@4Ω per channelVU Meter Brightness Adjustment: 5 levels(100%, 75%, 50%, 25%, Off)Power Supply Voltage: DC 5V USB-C
Supports High Power Transmission
Each channel supports up to 250W, ensuring strength and clarity in your music.
Compatible with Various Amplifier Types
Supports all mainstream amplifiers on the market, meet your diverse pure music enjoyment needs.
1 2-In 2-Out
2 AB Comparison Tests
3 250W Input/Output
4 Versatility
Large-Size VU Meters
Dual 85*45mm VU meters offer real-time feedback on left and right channel signal strength.
Front Panel Multifunction Buttons
Three integrated keys for power, brightness adjustment, and speaker/amplifier switching.
Needles Sensitivity Adjustment Knob
Adjusts sensitivity to match various input signal strengths, capturing every note’s pulse.
Five-Level Backlight Brightness Adjustment
VU meter backlight brightness offers five settings: 100%, 75%, 50%, 25%, and off.
1 Vintage Style
2 Multifunction Buttons
3 Sensitivity Adjustment
4 Brightness Adjustment
Large-Sized Chassis Design Saving Space
Can accommodate Fosi Audio compact amplifiers on the top, offering versatile configuration options.
Multifunctional Remote Control
Makes switching more convenient, allowing you to navigate your audio and focus on the music.
Exquisite All-Aluminum Alloy Chassis
One-piece CNC-molded and anodically oxidized for a sandblasted all-aluminum body.
Connection Diagram When Used as a Switcher 
Connection Diagram When Used as a Pure VU Meter
1 Large Box
2 Remote Control
3 Robust Build
4 Connection Diagram1
5 Connection Diagram2
Superior Quality Components 
High-quality Relays
Leveraging superior internal components for high-power lossless output, creating an unparalleled exceptional listening experience for you.
390Ω Load Resistors
Designed to prevent amplifier no-load conditions, guaranteeing stable operation and extending lifespan.
Thickened Circuit Traces
Utilizes thickened copper foils in the circuitry to minimize power loss during audio transmission.
User-friendly Terminal Design
Terminals oriented upwards/downwards simplify the cable connection process, ensuring easy and quick connections.
Comparison Chart
Add to Cart
Add to Cart
Add to Cart
Add to Cart
Add to Cart
Customer Reviews
4.3 out of 5 stars 162
4.5 out of 5 stars 2,170
4.4 out of 5 stars 1,374
4.0 out of 5 stars 66
4.1 out of 5 stars 462
4.2 out of 5 stars 105
4.5 out of 5 stars 897
Price
$134.99$134.99
$99.99$99.99
$109.99$109.99
—
—
$170.99$170.99
$89.99$89.99
Type
VU Meter Amplifier
Bluetooth 2.0 CH Amp
Bluetooth 2.1 CH Amp
Bluetooth Tube 2.1 CH Amp
Bluetooth DAC 2.1 CH Amp
Bluetooth 2.1 CH Amp
Bluetooth 2.1 CH Amp
MAX Power Output
250W
300W x 2
165W×2+350W
50W x 2
50W x 2
165W x 2 + 350W @ 4Ω
160W x 2
Input
Two Amplifiers
Bluetooth + RCA
Bluetooth + RCA
BT + 3.5mm AUX1+3.5mm AUX2
BT+ AUX + PC-USB + OPT + COA
Bluetooth 5.3+RCA+COA+OPT+USB
Bluetooth + RCA + U-disk
Output
Two Pairs of Passive Speakers
Passive Speakers+Pre-Out
Passive/Active SPK/Sub
SPK+Sub+Headphone
Passive Speakers + Active Sub
SPK OUT+SUB OUT+3.5mm PRE OUT
Passive Speakers + Active Sub
Treble & Bass Control
✘
✔
✔
✔
✔
✔
✔
THD
<0.001%
≤ 0.005%
≤ 0.3%
≤ 0.1%
≤0.01%
≤0.03%
≤ 0.05%
SNR
≥108dB
≥108dB
≥ 108dB
≥ 80dB
≥105dB
≥100dB
≥ 98dB
Terminating Impedance
4 Ohm
2-8 Ohm
2-8 Ohm
4-8 Ohm
2-8 Ohm
4-8 Ohm
2-8 Ohm
Power Adapter
USB-C Power Cable
32V/5A
32V/5A
–
24V/4.5A
32V/5A
24V/4.5A
Work Voltage
DC 5V
AC 110V – 240V
AC 110V – 240V
AC 110V – 240V
AC 110V – 240V
AC 110V – 240V
AC 110V – 240V
Vintage Elegance: The LC30 boasts dual large VU meters, complete with adjustable brightness across five levels. It offers versatile connectivity with two inputs and two outputs, enabling four distinct configurations. Beyond its functional prowess as a switcher, it stands as exquisite decorative VU meters allowing you to enjoy the vibrant audio-visual feast.
Versatile Compatibility: Fully supports a wide range of amplifiers. The large enclosure design accommodates not only two Fosi Audio compact amplifiers on top but also seamlessly integrates with traditional Class A, Class B, Class AB, and tube amplifiers without issues to meet your diverse audio enjoyment needs.
Superior Components: Integrated with 390Ω protective load resistors, thickened copper foil circuits, premium speaker binding posts, and switching relays, the vu meter audio ensures virtually no impact or loss in sound quality and supports a maximum 250W power transmission per channel. This allows you to enjoy the purest high-fidelity sound.
Ease of Use: Offers both button and remote control operation, enabling one-tap switching between two amplifiers and two speakers. It streamlines the process of A/B comparison testing for two amplifiers or speakers, ensuring straightforward accessibility. Moreover, adjusting the backlight brightness and needle sensitivity is made effortlessly simple, enhancing the overall user experience.
Crafted for Audiophiles: The LC30 was specially developed to cater to our fans’ requests. It embodies the Fosi Audio signature all-aluminum alloy construction for durability and reliability. This device is destined to be a lasting companion for your HiFi home audio system, ensuring enduring satisfaction.
Customers say
Customers appreciate the amplifier’s sound quality, with one noting it adds no noise and another mentioning it’s great for comparing amps and speakers. The device features adjustable brightness on the VU meters, and customers find it well-built and retro-cool in appearance. They like its functionality and build quality, with one customer highlighting its seamless switching between setups.
11 reviews for 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
Add a review
Related Products
Original price was: $159.99.$134.99Current price is: $134.99.
Max K Ma –
Great Product I Didnât Know I Needed!
Iâve 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, Iâve 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 didnât 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 havenât been happier since. Iâm 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 Iâve 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 didnât do more than one quick listen with each one to decide and left it at that. Since then, Iâve felt I could improve my sound systems everywhere with Fosi equipment so Iâve 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 itâs nice they used all the buttons on the kind of generic remote to give you different ways to change the settings. I donât have a tool to test how accurate the meters are but they seem to work fine and letâs face it, itâs just fun to watch the lit up meters dance while your system is playing. For those who have the tools or desire, itâs very easy to dial in the sensitivity of the meters although I donât think you can set it for two different amps at the same time since there is only one analog dial but that hasnât come into play for me yet as Iâm 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 Iâm listening to and itâs 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!
Johnny Rockster –
Retro Cool
This is a cool âtoyâ that provides flexibility to compare different amps and speakers.I love the retro look that the illuminated VU meters provide my mini system. There was no noticeable loss of sound quality when I introduced this between my amp and speakers. There is no gain control for the VU meters but I did not care. There is a similar brand of VU meter (also available on Amazon) that does have gain control but it has the manufacturerâs name on the top of the meters. I did not that look.
alan fenick –
Wanted an Amplifier and Speaker switch!
Wanted an amplifier and speaker switch to run two audio systems. The meters were secondary. Well made and sturdy. I seems to be inaudible and invisible when being used and thatâs exactly what I wanted. Very simple to set up and absolutely no problems. Like the meterâs light in a dim room. Imparts no distortion or noise.
Roy P. –
A Nice Addition for Equipment Testers and Analog VU Meter 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.
GMJ3 –
Not just a pretty box and display – very useful
I originally bought this as a throwback to 1970’s receivers which had vu meters, and to a gizmo I used to have from Radio Shack back in the day, and this unit does all that extremely well. It is nice to have a visual for volume and signal strength again. The knob on the front can change the sensitivity when listening to loud or soft music, and the brightness can be adjusted.My main amp is a Fosi BT 30 Pro main and subwoofer amp, and this unit works well with that setup. The Fosi amp does not have a tuner, and with the Selector, I am able to instantly switch to a 1980’s vintage Yamaha receiver to drive my two main speakers when listening to FM radio and my CD player.Another benefit of the Selector is to test the subwoofer output when using the Fosi amp. By de-selecting the main speakers (I do not have any B speakers connected to the Selector), I can hear just the subwoofers since they are NOT connected to the Selector. This lets me fine tune the SW settings on the Fosi amp, and to make sure there are not any driver issues. Earlier, I had to repair a woofer cone due to some age-related foam surround deterioration, and the Selector lets me make sure all the subwoofer cones and wiring are performing properly.
Bill K. –
Good switch, bad power meter
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.
Malin R. –
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.
BiTZ –
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
Pippo ok –
Ottimo apparecchio, lo consiglio per chi ha da attaccare do amplificatore su una coppia di casse praticamente uno switch bidirezionale
Tanmay Rao –
The Fosi LC30…..a useful little Amplifier Speaker Selector.Being a diy speaker hobbyist, I own many a speaker. Auditioning different speakers and amplifiers has always been a problem. But then comes the LC30…it lets me toggle between speakers and amplifiers with ease. And it comes with a remote at that. The large VU meters give it a bit of a classic vintage look. The VU meters by themselves have adjustable sensitivity and brightness and the yellow is quite pleasing to the eye. It serves it’s purpose to the T.I also own a pair of ZA3 amplifiers and some V3 Monoblocks that I use for HT purposes. The ZA3 and the V3 Mono are absolutely superb. Good clean power. I use iFi Audio Zen 2 DAC for my music predominantly streamed on Tidal. The sound is clean and rich and not at all overpowering or over bright throughout the music frequency range.All in all….I can say that all the ZA3, V3 Mono and the LC 30 are superb products and worth their price. Good VFM.Awaiting more good products from the Fosi stable…
Client d’Amazon –
Correspond exactement à mes attentesLes vus mètres bougent a des niveaux raisonnable d’écoute contrairement a certain commentaires. 2 amplifacteurs branchés un classe A Cayin a lampes et un classe D SMSL FDA. 2 paire d’enceintes JBL L100 ET DAVIS ACOUSTIC COURBET N°8 cela m’évite de débrancher rebrancher les enceintes et surtout d’allumer et d’éteindre les amplificateurs. Le switchage s’effectue sans difficulté. Seul bémol la télécommande interagit sur mon tuner numérique. Mais rien de bien grave.