KEF LS50 Meta Review (Speaker)

[Purité Audio]

I'm thinking of stacking (with 30cm vertical space) the kef ls50 where each stack (2 speakers) is a separate channel.

Anyone see a problem with this?

I would point you towards …

Gershman Acoustics Grand Studio II Loudspeaker Lab Report

Lab Report As I discuss in our boxout stacking two notionally identical speakers boosts output but complex reinforcement/cancellation will occur from the offset wavefronts. Three forward responses are plotted here by way of illustration [see Graph 1] – on the top bass/mid axis [red trace], top...

www.hifinews.com

Keith

 

[Impossible]

Yes, this was my worry, to minimise this I would have a 30cm gap between them vertically and they would be on independent channels so they can be level aligned, time aligned and phase aligned. They could also have their own eq if needed.

 

[TheLastGerman]

You may be able to minimize the adverse effects, but you will not eliminate them. What's the point of using point source speakers for such a setup?

 

[Impossible]

You may be able to minimize the adverse effects, but you will not eliminate them. What's the point of using point source speakers for such a setup?

I like the tonaility and the transient response. Can't find anything that sounds the same but with more dynamic range.

 

[TheLastGerman]

I like the tonaility and the transient response. Can't find anything that sounds the same but with more dynamic rang

The individual speakers have individual transient responses, so there will be overlay effects.

 

[Impossible]

The individual speakers have individual transient responses, so there will be overlay effects.

But isn't that the same for any multi speaker sound system? Or mayb I missed something, please clarify.

 

[TheLastGerman]

I mean two speakers with individual transient responses per channel. Does this make it clearer?

 

[Impossible]

I'm not sure really what you mean but I will try to answer. I expect the transient response to be the same as they are the same model speaker. Maybe some minor manufacturers variance.

But the speakers will be time aligned, phase aligned, level matched, same target curve.

 

[holdingpants01]

I'm not sure really what you mean but I will try to answer. I expect the transient response to be the same as they are the same model speaker. Maybe some minor manufacturers variance.

But the speakers will be time aligned, phase aligned, level matched, same target curve.

I think he meant separate drivers in each speaker, but then it wouldn't matter because of the thing called crossover

 

[TheLastGerman]

I think he meant separate drivers in each speaker, but then it wouldn't matter because of the thing called crossover

Nope, he meant a stack of two complete loudspeakers of the same type per channel. @Impossible: How about doing as you intend? You have a pair of loudspeakers, so you can give your idea a try for one channel. I don't think it will work, but that's just me. I'm looking forward to what you find out ...

 

[holdingpants01]

Nope, he meant a stack of two complete loudspeakers of the same type per channel. @Impossible: How about doing as you intend? You have a pair of loudspeakers, so you can give your idea a try for one channel. I don't think it will work, but that's just me. I'm looking forward to what you find out ...

lol, it would work but worse than one speaker, I've seen a lot of random setups but this would be in TOP 5

 

[Impossible]

Yes after further reading and discussions with a more knowledgeable person then me in this regard its not a good idea.

 

[ALex_hha]

Can I use Topping DX9 to drive LS50 Meta ? Does it have enough power ?

 

[TheLastGerman]

Can I use Topping DX9 to drive LS50 Meta ? Does it have enough power ?

Are you asking whether you can connect the LS50s directly to the headphone output of the DX9? No way ...

 

[ALex_hha]

Are you asking whether you can connect the LS50s directly to the headphone output of the DX9? No way ...

I was referring to Line out XLR/RCA outputs

 

[Ron Texas]

I was referring to Line out XLR/RCA outputs

Nope. You need a power amplifier. I would say at about 100 watts.

 

[Calypso1]

Nope. You need a power amplifier. I would say at about 100 watts.

Or active speakers but most definitely, not LS50 META.

 

[ALex_hha]

Or active speakers but most definitely, not LS50 META.

Something like Genelec ?

 

[staticV3]

Something like Genelec ?

Yes. Anything with a Line in port to match the DX9's Line out port.

 

[ALex_hha]

Yes. Anything with a Line in port to match the DX9's Line out port.

And what PA would be a good pair for LS50 Meta under 1000$ ?