Fosi Audio LC30 Speaker/Amp Switcher & Meter

[amirm]

Hi Chief, what's the easiest way to measure power wattage sent from an amp to speakers? So that we know how much top wattage is actually being sent to a speaker at the given listening level? Thanks.

I am using Audio Precision. You can use a test tone, an AC RMS reading meter and dummy load to measure the voltage. Then watts = V*V/R.

 

[amirm]

An interesting and useful lesson regarding quality of speaker connections when using high quality, high power amplifiers!

This has been no end of aggravation for me and some amp designer/builders! I routinely have to rebuild my connections to make them secure again to achieve very low distortion at higher powers.

 

[Haskil]

Thank you, Amir !
I gave a bad rating because I believe that when using a VU meter as long as it is calibrated... If it is not there is no other interest than having the lights of Christmas all year round...

 

[bumblebee657]

Oh my. Another gimmick meter. There are billions of better ways to spend that money.

 

[Purité Audio]

Not just meters, amplifier/speaker switching .
Keith

 

[Sylvia]

Thank you so much Amirm!

 

[Tovarich007]

But, what this device is supposed to be designed for ?
Ok, it looks nice, it's "competent" (of course for a well done passive device, nothing extraordinary indeed), but tha's all.
Fosi should better release a stereo class D amp with the same design and circuits at least as good and as powerful as their best other power amps.

This would be both fun and great for a little good system.

 

[DanielT]

Thanks for the review Amir. This was a fun and cozy VU meter gadget, I must say.

Oh my. Another gimmick meter. There are billions of better ways to spend that money.

Better ways, well Fosi Audio LC30 is a fun little gadget with a VU meter that lights up in the dark. An adult bling toy, nothing wrong with that. Plus it actually has some useful practical features on top of that. For $150 Fosi Audio LC30 is perfectly fine.

Test your hearing with friends. Adjust the volume on the amplifiers until you hear no difference when A/B switching between them, then blind test with your friends to see if they have better hearing than you do. That Friday exercise with good friends alone could almost be worth $150.

The function of A/B testing speakers is also provided with the Fosi Audio LC30. It's an excellent way to subjectively compare speakers in your listening room.
Having said that, a small addendum. For those who don't already know: Highest volume wins. So you don't fool yourself with A/B switching speakers if they don't have the same sensitivity.

 

[Tryphon]

Am I wrong or the Neohipo ET30 is very close but offer slighly more functinalities ?
But no sure to have seen if Neohipo switching as an impact or not.

 

[WOLFAGRAM]

I am going to recommend the Fosi LC30 meter and speaker/amplifier switcher for fun factor.

At the end of the day, that is the point of the whole audio/music activity for majority of us here...

...and probable source of frustration for minority of audio professionals.

 

[Sir Sanders Zingmore]

Official site; https://fosiaudio.com/products/fosi-audio-lc30-amplifier-speaker-switcher

You just lost me with this nonsense

 

[martijn86]

You just lost me with this nonsense

View attachment 396296

I hope for Fosi that they verify your age before tempting you to gamble for savings.

 

[Andreas007]

Vollenweider?

Nope! Currently, I play the harp mostly because I enjoy it. Sometimes, also for other (sick) people. I plan to extend this in the future.

 

[bumblebee657]

Better ways, well Fosi Audio LC30 is a fun little gadget with a VU meter that lights up in the dark. An adult bling toy, nothing wrong with that. Plus it actually has some useful practical features on top of that. For $150 Fosi Audio LC30 is perfectly fine.

Well, no. Don't waste $150. Instead better spend around $300 and get a TC electronic Clarity M that has excellent value and shows exactly what's going on. And the bling bling factor is there too.

 

[bumblebee657]

Does the Clarity M have high-level connectors for speakers?

Jim

Is that Fosi thing anything more than just a speaker/amp switcher with a non functional VU/power meter?

 

[tomtoo]

For the child in the man. As long it makes happy, all is good.

 

[Multicore]

I want this, but including this into a digital system is not trivial…

Get one of those multi-room streaming set ups and dedicate a "room" to your meters.

 

[bumblebee657]

No, it's not. But my question was about the Clarity M. From what little I could see, it doesn't seem to have high-level connectors for speakers. (I didn't find any pics of the back, although I didn't do an exhaustive image search.) It seems to have strictly a low-level function. Is that correct?

Jim

Correct. It only has digital inputs. You can simply use something like a toslink switch after the source to feed it.

 

[renaudrenaud]

So I am not the only one on this forum listening to Wollenweider?

 

[bumblebee657]

I want this, but including this into a digital system is not trivial…

But including something like the Clarity M into a digital system is.