KEF Ci250RRM

[Kurly]

So back to my question... how do you build the wall/ceiling to not ruin the speaker? Resilient channel is not rated to support the load of a normal speaker, especially in the ceiling, and this is not a normal speaker. It weighs twice as much as the rest of their architectural line..

I'm doing the same thing right now. Slowly building my next cinema room with a floating wall/ceiling. I've removed all power, wires, pipes etc behind the wall to be surface mounted within large trunking etc.

..But for the surround and rear speakers, I'm going to build surface mounted full wall height boxes, so as not to cut into the walls. Then suspend them a little and rest them with some kind of rubber backs so as to help with decoupling them from the walls too.

Now if you have to cut into the walls, I would have build large back boxes to help with the recommended box volume.

Good luck with yours!

 

[Descartes]

I'm doing the same thing right now. Slowly building my next cinema room with a floating wall/ceiling. I've removed all power, wires, pipes etc behind the wall to be surface mounted within large trunking etc.

..But for the surround and rear speakers, I'm going to build surface mounted full wall height boxes, so as not to cut into the walls. Then suspend them a little and rest them with some kind of rubber backs so as to help with decoupling them from the walls too.

Now if you have to cut into the walls, I would have build large back boxes to help with the recommended box volume.

Good luck with yours!

What size box do you build, is there a recommended volume for each in wall KEF Speakers? I seem to recall that they had a table somewhere but can’t find it anywhere!

 

[this is me]

What size box do you build, is there a recommended volume for each in wall KEF Speakers? I seem to recall that they had a table somewhere but can’t find it anywhere!

https://images.salsify.com/image/upload/s--GDv-E_Eu--/ef7178dd21cf9ce0933c1dadcb864a0a25b7329b.pdf

 

[jonfitch]

I feel like this driver could go into something like a Revel Gem 2-form factor and could be sold as a bookshelf version of the Blade or something...

A pair of these with some subs would make a really interesting HT setup. High dynamic range, point source coaxial with zero IMD (or excursion) issues even with very demanding material.

 

[Blackdevil77]

Is this speaker going to get measured at some point? I'd like to see that. Would also like to see what compression looks like similar to Erins instantaneous compression test.

 

[Dj7675]

Is this speaker going to get measured at some point? I'd like to see that. Would also like to see what compression looks like similar to Erins instantaneous compression test.

Not until someone buys one and sends it in

 

[Blackdevil77]

Anyone looking to purchase one? I may or may not have a source that may make it worth someone’s while if they allow it to be measured

 

[Daka]

I wonder if those would be better for LCR than ci3160rl(m). 10” LF driver has bigger surface area than 2 6.5”, mid woofer is smaller but then crossover is higher. We don’t know what dynamic compression is like and distortion levels. But beside that it does look like better speaker for less? It should have wide directivity (Compared to meta version of 3160).

 

[Lbstyling]

I wonder if those would be better for LCR than ci3160rl(m). 10” LF driver has bigger surface area than 2 6.5”, mid woofer is smaller but then crossover is higher. We don’t know what dynamic compression is like and distortion levels. But beside that it does look like better speaker for less? It should have wide directivity (Compared to meta version of 3160).

We know some of this information. Mid and tweeter of the ci250rrm is the same as the unit found in the LS60 that Erin measured.

 

[Zero Dark Fifty Five]

Seems like a no brainer to set a pair of these in cabinets with two Purifi 10" woofers (to round out the base) and control with a 3 way Hyperx Fusion amp plate. Has anyone made a pair of MEGA Blade? Might fire up the Fusion360 cad and roughly design a set.

 

[Descartes]

Seems like a no brainer to set a pair of these in cabinets with two Purifi 10" woofers (to round out the base) and control with a 3 way Hyperx Fusion amp plate. Has anyone made a pair of MEGA Blade? Might fire up the Fusion360 cad and roughly design a set.

Please show us your design

 

[exm]

I just bought 4 of these replacing my R8 Meta's. Unfortunately they're already installed so I can't send them for a review but I can tell you that these are fantastic speakers.

 

[Descartes]

I just bought 4 of these replacing my R8 Meta's. Unfortunately they're already installed so I can't send them for a review but I can tell you that these are fantastic speakers.

No surprised just a bit expensive!

 

[quattro98]

We have 6 of the Ci250RRM-THX. I can't tell you much about them. 4 are used at Atmos in our main system (living room, not dedicated room). I wanted them because the LS60-size Uni-Q has great off-axis dispersion with the small midrange & tweeter diameter. If we ever get Dirac ART or something similar, the bass response may prove useful. I only tried them full range for a bit when we were doing the install, but was excited to get everything setup. Maybe the next time I rearrange something, I will try them full range as a two channel setup for a few minutes.

The other two are using in a dinet area and temporarily connected to a spare amp running directly from a TV. In that room (lots of glass and tile), I used the tone controls of the TV to turn up the bass. The sound is nice with that tweak. If I wanted to run them full range, having some EQ might be helpful. Eventually this system will get a new TV and equipment. I will make sure it has some form of EQ or room correction with manual settings.

In the KEF specs for these, the FR is stated as +/- 6 dB. This differs from their usual +/- 3 dB for other speakers. Eyeballing page 9 (7 Appendix) of the white paper, the response extends down to the 40-50 Hz range or so.

Although expensive, they provide great midrange and highs with even off-axis response (I prefer a dedicated midrange driver) and useful bass response so they will actually blend with a sub without using a > 100 Hz crossover which is what I'd normally do for an architectural speaker.

 

[Descartes]

We have 6 of the Ci250RRM-THX. I can't tell you much about them. 4 are used at Atmos in our main system (living room, not dedicated room). I wanted them because the LS60-size Uni-Q has great off-axis dispersion with the small midrange & tweeter diameter. If we ever get Dirac ART or something similar, the bass response may prove useful. I only tried them full range for a bit when we were doing the install, but was excited to get everything setup. Maybe the next time I rearrange something, I will try them full range as a two channel setup for a few minutes.

The other two are using in a dinet area and temporarily connected to a spare amp running directly from a TV. In that room (lots of glass and tile), I used the tone controls of the TV to turn up the bass. The sound is nice with that tweak. If I wanted to run them full range, having some EQ might be helpful. Eventually this system will get a new TV and equipment. I will make sure it has some form of EQ or room correction with manual settings.

In the KEF specs for these, the FR is stated as +/- 6 dB. This differs from their usual +/- 3 dB for other speakers. Eyeballing page 9 (7 Appendix) of the white paper, the response extends down to the 40-50 Hz range or so.

Although expensive, they provide great midrange and highs with even off-axis response (I prefer a dedicated midrange driver) and useful bass response so they will actually blend with a sub without using a > 100 Hz crossover which is what I'd normally do for an architectural speaker.

Very nice, I have been looking at them for a while but haven’t decided yet if they are worth the price for ATMOS!

 

[exm]

Thanks Quattro98 for your reply. Right now I have them set at 60Hz (4 in-ceiling, after running Roomperfect EQ), because I like to have stronger LF coming from my Atmos speaker. My dual subwoofers can certainly handle the redirect but I like the idea of having strong LF coming from the "top" channels. These guys have 10" LF drivers so they're certainly powerful enough. First impressions are very, very positive.

Descartes: any KEF dealer will gladly work with you to greatly reduce pricing of in-wall speakers.

 

[Digital_Thor]

Seems like a no brainer to set a pair of these in cabinets with two Purifi 10" woofers (to round out the base) and control with a 3 way Hyperx Fusion amp plate. Has anyone made a pair of MEGA Blade? Might fire up the Fusion360 cad and roughly design a set.

Aren't the KEFCi250RRM already crossed over with a pre-build passive network?
Because that means that you can get away with a 2 way Hypex plate amp, if further bass is needed... and a 3 way would give you the amps for 2 subwoofers aswell... all in a neat package.

 

[exm]

Aren't the KEFCi250RRM already crossed over with a pre-build passive network?
Because that means that you can get away with a 2 way Hypex plate amp, if further bass is needed... and a 3 way would give you the amps for 2 subwoofers aswell... all in a neat package.

Not sure if I am following you, but the Kef are regular passive speakers requiring an external amp. I'm using an amp with NC252MP.

 

[Digital_Thor]

Not sure if I am following you, but the Kef are regular passive speakers requiring an external amp. I'm using an amp with NC252MP.

I just thought that it was a raw driver, but found out it had the passive cross-over attached to the rear - making it a fully passive plug and play tri-axial driver.
I have been doing so much DIY over the years, and forgot that you could get that type of ready-to-run driver - my bad

 

[exm]

We have 6 of the Ci250RRM-THX. I can't tell you much about them. 4 are used at Atmos in our main system (living room, not dedicated room). I wanted them because the LS60-size Uni-Q has great off-axis dispersion with the small midrange & tweeter diameter. If we ever get Dirac ART or something similar, the bass response may prove useful. I only tried them full range for a bit when we were doing the install, but was excited to get everything setup. Maybe the next time I rearrange something, I will try them full range as a two channel setup for a few minutes.

The other two are using in a dinet area and temporarily connected to a spare amp running directly from a TV. In that room (lots of glass and tile), I used the tone controls of the TV to turn up the bass. The sound is nice with that tweak. If I wanted to run them full range, having some EQ might be helpful. Eventually this system will get a new TV and equipment. I will make sure it has some form of EQ or room correction with manual settings.

In the KEF specs for these, the FR is stated as +/- 6 dB. This differs from their usual +/- 3 dB for other speakers. Eyeballing page 9 (7 Appendix) of the white paper, the response extends down to the 40-50 Hz range or so.

Although expensive, they provide great midrange and highs with even off-axis response (I prefer a dedicated midrange driver) and useful bass response so they will actually blend with a sub without using a > 100 Hz crossover which is what I'd normally do for an architectural speaker.

What amplifier are using for these? I'm using a Hypex NC252MP based amp; I'm curious if I should jump to the NC502MP or if the 252 is sufficient...