[Hobbsmeerkat]

Sure... but... what is No Rez? Sounds like an absorber material... (sorry if that's a stupid question)

NoRez is a 2-layer damper and absorber that we offer.

The bottom layer is a 70mil mass-loaded vinyl with a self-adhesive backing designed to control cabinet resonances by adding mass to the walls.
Then the top layer is a 1" open-cell foam which balances out the airspace taken up by the vinyl damping layer, and also helps to control internal reflections.

[Tyson]

Sure... but... what is No Rez? Sounds like an absorber material... (sorry if that's a stupid question)

https://gr-research.com/product/no-rez-24x27-sheet/

[MarkoRockvoice]

Thanks!
I'll check what I would have to pay for import taxes and custom fees.

[JCarney]

Thanks!
I'll check what I would have to pay for import taxes and custom fees.

Look for products locally like Canopus or Dynamat. I use the Canopus material due to cost to performance. They are dampening materials that are self-adhesive to the surface you are trying to quiet down. They only have the asphalt like material, and foil, no open cell foam like No-Rez. No-Rez is the best stuff to use, but if not feasible, these other products do work pretty well. I've included a link to Canopus so you can read a little about it.

Best of Luck,
JCarney

https://www.canopusgroup.us/products/car-sound-deadening-mat

[maty]

Measurements by Erin

KEF R3 Meta: The Speaker to Beat
https://www.youtube.com/watch?v=nbZGj69rI0c

[maty]

[maty]

KEF R3 Meta Speaker Review, Best Speaker For Your Money?
https://www.youtube.com/watch?v=qaR6EQ4Nb8s

15:36 Sound Sample
https://www.youtube.com/watch?v=qaR6EQ4Nb8s&t=936s



I do not like the sound of these loudspeakers in any Youtube demo!

[maty]

Main crossover topology for R Series with MAT (3-way models)

[PDF] https://www.avsforum.com/attachments/kef_r_series_with_mat_whitepaper_compressed-pdf.3437187/

[MakroMini]

Hey everyone!

Not long ago, I learnt that KEF (like many other manufacturers) use low-tier parts for the crossovers of middle-class speaker series...
With solid constructed cabinets (MDF with bracings) and the drivers that can perform way better than with the stock crossovers, I started wondering...

I bought a couple of Mundorf caps and resistors, new binding posts and SOMMER cable for internal wiring.

This is the crossover HT/MT board out of the box

- Marko

Hi, I really appreciate what you have done and I have a few questions.

Which are the values (voltage rating and capacity) of the capacitors C1, C2, C3, C4? I am asking since I found out the woofer is screwed in the wood of loudspeaker box without a metal socket and I would like to remove the woofer as few times as possible when I work on the crossover.

Do you think it improves sound quality to replace resistors? (I did not find a physical explanation?)

Best regards

[maty]

New Record Day

The Gold Standard Of "Pretty Good" | KEF R3 Meta Review
https://www.youtube.com/watch?v=bIWY8NCk0qA

[milanulrichcz]

Hey everyone!

Not long ago, I learnt that KEF (like many other manufacturers) use low-tier parts for the crossovers of middle-class speaker series...
With solid constructed cabinets (MDF with bracings) and the drivers that can perform way better than with the stock crossovers, I started wondering...

I bought a couple of Mundorf caps and resistors, new binding posts and SOMMER cable for internal wiring.

This is the crossover HT/MT board out of the box


This is what it looks like now:


I am blown away by the difference... SO MUCH MORE detail... HUGE soundstage ...


But... I am pretty sure things can be improved further.

For instance, the area around 2.1/2.2 KHz... can sound aggressive (depending on the songs) ... electric guitars... and "EEEE"-vowels can be really annoying.

One thing I have noticed:

With the LS50 meta (which I also own and like) and the KEF references, the crossover from mid to tweeter is at 2.1 KHz (the KEF blade at 2.0 KHz), while the R-Series speakers cross over at 2.3 or 2.4 KHz.
I would love to come closer to the sound of the LS50 Meta (not the old LS50) and the KEF Reference speakers which offer more space and openness in the upper mids.

Measuring doesn't show a peak around the annoying area... but it's there and some albums are not fun to listen to any more...

45 cm distance, on-axis

ANY suggestions are welcome!

- Marko

Hi. I was looking to do same thing, and if this topic is still valid, I would like to as you for the parts values, if possible? thank you very much

Milan