GR Research NX-Extreme

I have GRs OB doubles but bought drivers for a third one. I wished I would have gotten the 8 ohm versions, for doubles. Then the 370 watt amp would have a little more push 370 @ 4, and half that at 8. So pick your drivers too. If you go trips, I think you have to use th 16 ohm drivers.
Doubles you use to have an option, 16 8 or 4, use to be anyways..

As for building them, just a snap, great workmanship and QC is outstanding.. Everything was dry fitted and marked.. Jays a great guy...,
The whole bunch had a LOT of patience, I ASK QUESTIONS, always a speedy response, very professional..

I had a pair of LS6s, man did they need breathing room. lots of room..
6-8 feet from back wall, no wall behind you worked the best, ampa style
sure a different speaker, the way they work, pretty picky, pretty cool if you get it right. lots and lots of room treatment..Same with most speakers..
I got them second hand, and the builder did a great job. I'd love a pair of LS9s oh yea...Much better tweeter section. I'd love to hear a pair...I think Danny uses a pair for reference in his builds.. Alu, frame. The new ones are HDF or MDF

Regards..

Good point about the two different versions of the woofer @oldhvymec. Knowing I was going to build doubles (the 2-woofer version), I got myself the 8 ohm woofers rather than the 16 (the woofers actually measure 14 ohms and 7, I believe). Putting two of the "8" ohm woofers on the plate amp creates a little more output from the plate amp than do two of the 16 ohm (the plate amp behaving as do almost all solid state designs). Three of the 8 ohm woofers can NOT be used on one amp, as their combined impedance is too low.   

bdp246,377 posts03-15-2020 11:40pm

Oh, I neglected to comment on the 4 ohm version of the GR Research woofer. GR Research offers a 4 ohm woofer,

Yup there was an option or two. 8 or 16 ohm drivers 8 ohm drivers are louder, hows that? Also a sand filled DIY, too. There are some guys that will build the kits, finnish is always the spendy part. Emron, was a great paint, just the lead content was through the roof..and no breathing it at all.
We called it drop dead gorgeous, paint...
Jay the box and kit builder guy with GR, has the speakers the OP is referencing, (I think). he just loves um. Ask him, good guy.. Quality work from that guy...

Regards

I heard the NX-Treme speakers at the Lone Star Audio Fest in May 2019. The sound was more three dimensional and holographic than anything I have ever heard before. It felt as though I could get up and walk completely around each individual performer as they were positioned on the stage.

The system was very dynamic and presented fine detail in a smooth, relaxed, non fatiguing way. Bass was deep and powerful, but sounded different from the deep bass of other systems I have experienced. It sounded less like a reproduction and more like bass heard in a live performance.

I was quite surprised to learn the price of the speaker system. Granted, you would have to invest the time to build them yourself, or additional money to have someone else build them, but I have heard several speakers in the $50,000-$100,000 range that did not engage me in the music like these did.

Based on the hour and 20 minutes or so I spent listening to them, I would highly recommend anyone in the market for new speakers this large to find a way to give them an audition.