New Genelec Main Monitor

[olegtern]

Actually, all tweeters in KEF uni-q can be called a compression driver, because the tangerine waveguide is desiged to provide compressive boost as well as shape the wavefront.

What is the compression ratio? 1/0.99999?

 

[Impossible]

any idea on the release date? I'm in Australia.

 

[Pearljam5000]

Dream setup

 

[napfkuchen]

Sony made various positioned front ports of all shapes back in the 90s .

My Philips Ghettoblaster had two front ports and turbo-bass, also a double-cassette-deck with highspeed dubbing. Genelec doesn't offer this, not even fast-bass ... it's pathetic.

 

[ssashton]

What is the compression ratio? 1/0.99999?

Frequency dependant - but they got a fairly broad 4.5db increase. So we could say around 1:0.6 at max.

This is clever, because in passive crossover design you normally have to cut back the low-end lift that the waveguide produces (peaking here around 2 kHz) to get a flat response up to 20 kHz. With the compression effect adding a boost from 10–20 kHz, less low-end attenuation is needed to achieve flatness. The net result is higher overall sensitivity, which is a real advantage in a passive system.

Sorry Genelec, for talking about KEF in your debut thread!

 

[Pearljam5000]

The design is growing on me

 

[olegtern]

With the compression effect

It’s more of a horn-loading or wave-shaping effect — compression per se doesn’t increase sensitivity.

(and there’s no real acoustic compression - compression refers to the ratio between the diaphragm area and the throat (or the phase-plug slot) area, which allows the driver to build higher pressure at the throat and handle more power, often improving low-frequency response. None of that happens in the KEF tweeter).

 

[dfuller]

Great movie.

 

[Ilkka Rissanen]

There are of course 'gotchas' that make this a generalisation. Actually, all tweeters in KEF uni-q can be called a compression driver, because the tangerine waveguide is desiged to provide compressive boost as well as shape the wavefront.

Actually, you don't need to have any special phase plug in front of a dome tweeter in order to see considerable increase in acoustic efficiency. Just by using a shallow waveguide one can see up to 4 - 6 dB gain compared to a flat baffle measurement. Typically, that gain is realized mostly below ~10 kHz while the very top end can see a little negative gain. And no, it is still not called a compression driver.

This is a small 19 mm dome in about 8030 sized waveguide. The loading effect is quite considerable already.

 

[srrxr71]

Let's break the problem down.
If a kick to the chest is in the 50-250Hz range, and the bass is supposed to be fast and powerful,
Can there be a fast bass at 50Hz? If not, at what frequency does it start?

The thing I noticed is that room treatment really helps. My bass decays so quickly.

 

[srrxr71]

No, no fast like people use it (and it probably means lack of low extension).
It's not fast, it's sudden, it attacks you. It's dry and decays instantly .

That's not a tonality issue and stuff, it's physical, if you feel it you know it.

“Decays instantly” well said.

 

[MKR]

This new Genelec looks similar to the decades old JBL Control 30 …

 

[ssashton]

It’s more of a horn-loading or wave-shaping effect — compression per se doesn’t increase sensitivity.

(and there’s no real acoustic compression - compression refers to the ratio between the diaphragm area and the throat (or the phase-plug slot) area, which allows the driver to build higher pressure at the throat and handle more power, often improving low-frequency response. None of that happens in the KEF tweeter).

This was the subject of Dr. Oclee-Brown’s PhD thesis. It’s a long read if you want all the details, but the key point is that the boost above 10 kHz in that plot isn’t due to horn or waveguide loading, it comes from the compression in the cavity between the front of the tweeter dome and the rear of the Tangerine waveguide.

https://eprints.soton.ac.uk/348798/1/Jack_20Oclee-Brown_20PhD_20Thesis.pdf

 

[Vacceo]

View attachment 480472
The design is growing on me

Someone has been paying attention to the Sigberg´s Manta.

 

[Pearljam5000]

Someone has been paying attention to the Sigberg´s Manta.

Why didn't they make the 8380 Cardioid like the Manta?

 

[staticV3]

Why didn't they make the 8380 Cardioid like the Manta?

The 8380 is designed for soffit mounting.

 

[Vacceo]

Why didn't they make the 8380 Cardioid like the Manta?

They are meant primarily for studios, and those are super controled environments for starters. It might not be worth the extra cost.

 

[ssashton]

Cardioid would need, at minimum, one extra woofer but realistically two. Plus amplifiers and DACs. Then you loose SPL, not gain it because those woofers work against each other. Too much trade off in SPL, increase in cost and not suitable for soffit mounting.

 

[Blockader]

Why didn't they make the 8380 Cardioid like the Manta?

When flush mounted on a large wall, 8380's can have the bass directivity control of a cardioid speaker while also having less front wall SBIR.

In high end listening rooms or purpose built studios, flush mounting is the ideal solution. Cardioid designs are essentially for situations where flush mounting isn't possible.

 

[Pearljam5000]

When flush mounted on a large wall, 8380's can have the bass directivity control of a cardioid speaker while also having less front wall SBIR.

In high end listening rooms or purpose built studios, flush mounting is the ideal solution. Cardioid designs are essentially for situations where flush mounting isn't possible.

But if I'll buy them one day for home use there 0 chance I'd soffit mount them