I Found this in depth break down and review of RCF EVOX 12

To many ads? Support ODJT and see no ads!
DJ Ricky B

DJ Ricky B

DJ Extraordinaire
Mar 9, 2015
8,258
6,905
43
I just wanted to share that I found this in depth inside look, audio test, and honest review of the RCF EVOX 12. When i first heard this system at DJ EXPO 2015 It was solidly in the top 3 speaker systems I heard that day. I remember top 3 being RCF 745A, RCF Evox 12, and Yamaha DSR.

This is a good watch!

View: https://www.youtube.com/watch?v=ogM71MoOrdg
 
  • Like
Reactions: ittigger
Wow! These guys know nothing about acoustic testing. You never do a frequency sweep with a weighting filter. All you are really measuring is the filter's response, not the speaker response. What is interesting is that the spectrogram they show clearly displays the 2nd and 3rd harmonics (aka distortion) but they make no mention of it. They call a dust-cap a phase-plug. IMHO, they have no idea how little they actually know. The tools they are using were designed by a friend of mine for car audio guys doing dB drag racing. The designer knows his stuff but he knows the skill set of the typical car audio guy is much smaller.

I moderated a panel session at the Audio Engineering Society convention in Oct on column speakers. We showed the ideal radiation patterns of such speakers. They can move a lot of air but designs like the Evox 12 make many acoustic compromises, some of which you may not like. I will be repeating the session a few times later this year and one of these presentations should be recorded.
 
  • Like
Reactions: DJ Bobcat, Albatross, ittigger and 1 other person
sawdust123 said:
Wow! These guys know nothing about acoustic testing. You never do a frequency sweep with a weighting filter. All you are really measuring is the filter's response, not the speaker response. What is interesting is that the spectrogram they show clearly displays the 2nd and 3rd harmonics (aka distortion) but they make no mention of it. They call a dust-cap a phase-plug. IMHO, they have no idea how little they actually know. The tools they are using were designed by a friend of mine for car audio guys doing dB drag racing. The designer knows his stuff but he knows the skill set of the typical car audio guy is much smaller.

I moderated a panel session at the Audio Engineering Society convention in Oct on column speakers. We showed the ideal radiation patterns of such speakers. They can move a lot of air but designs like the Evox 12 make many acoustic compromises, some of which you may not like. I will be repeating the session a few times later this year and one of these presentations should be recorded.
Click to expand...

That is certainly an interesting summary of your thoughts about the video.

My thought was that the box and column is built with great materials and seems very well made.

However, I do agree with them that RCF should have used at least 16 guage wire. Then again, if people are using the EVOX 12 for many years with no problems then the 18 guage probably worked out just fine and saved FCF a few dollars per unit in the build cost.

The SUB RMS rating was certainly promising as well. It actually read higher than advertised. That almost never happens. 582 watts RMS, that woofer must really kick.
 
  • Like
Reactions: ittigger
For short lengths of cable. the thinner wire doesn't matter much. 18 AWG wire has a resistance of 6.385 ohms per 1000 feet while 16 AWG drops that to 4.016 ohms per 1000 feet. That seems like a big difference until you divide those numbers by 333 (assuming the length is 18 inches and counting both wires). The 18 AWG wire adds 0.019 ohms whereas a 16 AWG wire will add only 0.012 ohms. In other words, the difference is just seven thousandths of an ohm. Don't forget, the tinsel wires that go from the speaker terminals to the voice-coil are much thinner conductors and the voice coil itself is even thinner.

RCF is a quality brand. I'm sure their components are of high quality. My issue is with the acoustics of the stacked mid-high drivers. This is what my panel session was about. You simply can't cheat physics.
 
  • Like
Reactions: DJ Bobcat, Albatross and ittigger
You must log in or register to reply here.
Top Bottom
Back