Video: Long Throw Polisher Sound Comparison

Disclaimer: One thing to keep in mind, is no one that did any of the testing here is a scientist or engineer. So keep in mind there is a margin of error. We`re just a bunch of "regular" guys in a garage sharing our results and data.

This video is in response to Mary B`s request for a sound and vibration comparison between the new FLEX XFE7-15 and the Griot`s Garage BOSS G15. (original thread) Thanks for the request Mary B!

We decided to put the FLEX XFE7-15 against the 21mm polishers because all of the polishers in the test use 6 inch backing plates OEM. Since the FLEX XFE7-15 is powerful enough to spin a 6 inch backing plate, we wanted to test it against other 6 inch polishers.

For sound level data, we used the "Sound Meter" app on my LG G4 phone. After calibrating, we tested the sound decibel meter with other devices and found it was surprisingly consistent. We all agreed it would work to compare sound level between these 3 polishers.



We primed each pad with McKee`s 37 Fast Polish and the same product was used on each machine.

Now....without further ado.....the video....

https://youtu.be/3KASUpRU8jw



p.s. Thanks to Nick@Autogeek for lending us a hand.

Average DB results:

61 db FLEX XFE7-15
64 db Griot`s Garage BOSS G21
66 db RUPES LHR 21ES

Now we all thought this would be a good opportunity to compare the size and weight of each machine...



You can really see a size difference when the 3 polishers are lined up side by side.



The RUPES LHR 21ES is the longest of the 3 coming in at 16 inches.



The Griot`s Garage BOSS G21 came in at about 15.5 inches.



The FLEX XFE7-15 came in at 14 inches.



Now for the weigh in...

The piece of fancy cardboard we used registered at .10 lbs.



The FLEX XFE7-15 registered 5.3 lbs



The RUPES LHR 21ES registered 6.1 lbs



And the Griot`s Garage came in at 6.2 lbs



Summary Data:

Average DB results:

FLEX XFE7-15 61 db
Griot`s Garage BOSS G21 64 db
RUPES LHR 21ES 66 db

Length:

RUPES LHR 21ES 16 inches
Griots Garage BOSS 21ES 15.5 inches
FLEX XFE7-15 14 inches

Weight:

RUPES LHR 21ES 6.1 lbs
Griots Garage BOSS 21ES 6.2 lbs
FLEX XFE7-15 5.3 lbs

Final Thoughts:

Another request we had was to compare the vibration of each machine. Both Paul and I tested each machine side by side, back to back, and concluded the FLEX XFE7-15 had the least amount of vibration by a very small margin. We tried each machine with thin and thick pads (the FLEX works and feels great with RUPES pads btw). One thing to note is the RUPES Mark II felt like it had the most power, again...by a very small margin. We weren`t able to bog down any of the pads with any of the machines, so the days of stalling backing plates on long throw machines are behind us.

Also, we tested the vibration of the 21mm throw of the RUPES and Griot`s Garage v.s. the 15mm throw of the FLEX. The larger rotational pattern may attribute to the slight increase in vibration, but again; we wanted to compare 6 inch polishers across the board.



Thanks for reading everyone!

If you have any questions or comments, let us know!