Thanks for doing that! Is there any chance you could show those same results, but changing the graph settings so that the X-axis ranges from 20Hz to 20kHz, and the Y-axis from 50 to 100dB? That’s how Amir and others usually shows their measurements, so it helps for comparability.I finally got a chance to run REW on the Revel F328Be in my listening room. I have the Denon 4700 setup in Pre-amp mode and configured in Direct mode with the Monolith 7X200 powering the F328Be for the test shown below.
REW and UMIK recorded the results below. I set the UMIK at 41" high the same as my seated ear position. Zero EQ is used in this example. I measured at 6 feet (purple) and again at 10' (brown) from the right speaker location. The results are flat down to 40Hz in my listening room and if I turn on Audyssey Dynamic EQ it raises the bass response, making it flat down to 25Hz. The BASS on the Revel 328 is hard hitting, tight and quite a bit of fun.
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Thanks for doing that! Is there any chance you could show those same results, but changing the graph settings so that the X-axis ranges from 20Hz to 20kHz, and the Y-axis from 50 to 100dB? That’s how Amir and others usually shows their measurements, so it helps for comparability.
Edit: Adding 1/6 or 1/12 smoothing would be great as well.
I can try the next time I get the UMIK and cables out. It's kind of an ordeal to get it all setup. Can you post a picture of where the preferences (20Hz to 20kHz, and the Y-axis from 50 to 100dB) go in REW. I'll print it so I have it for the next REW run. Thank you!
Yes, sorry, it wasn’t my intention to have you remeasure everything. As @BYRTT said, as long as you saved the measurements in REW, you can just load them back in and reformat them by adjusting the scale on the axis through the Limits button on the top right, and the smoothing is adjusted through the Preferences icon (the gear), a little further to the right.I can try the next time I get the UMIK and cables out. It's kind of an ordeal to get it all setup. Can you post a picture of where the preferences (20Hz to 20kHz, and the Y-axis from 50 to 100dB) go in REW. I'll print it so I have it for the next REW run. Thank you!
Yes the single AHB2 sits on top of the cabinet in the middle, I have pushed this thing pretty hard basically to the limits of my tolerable listing levels and have yet to see any clipping lights. Last nites entertainment was the DVD 4k version of one of my favorites: "The greatest showman" which was cranked up, followed by a "Talking Heads" concert on Prime, the AHB2 barely getting warm. As you can see no subs so the 328/AHB2 are doing all the work.
Thank you for all the info Rich. I certainly had in the back of my mind when I purchased the AHB2 that it may not have enough power and I was fully prepared to return the unit if I found myself encroaching the clipping zone. I was not going the bridged route and would have switched to a Purify amp had I needed more power. But as hard as I dare drive this thing it has not got hot or indicated any distress. Needless to say I'm also super pleased with the sound quality, just not sure it could get much better unless one was prepared to spend a lot more (which I was not).
I have a friend that bridges his AHB2s to drive his Salon2s and another that bi-amps.
So, they are find bridged.
The clip/distortion and protection are also class leading. I don't know of any amplifier that has these combinations of features.
These amps have been out for almost 6 years now, and I have yet to hear of a single failure.
- Rich
Below is the REW image for the Revel F328Be in two versions with the 20Hz to 20kHz, and the Y-axis from 50 to 100dB settings. The first version is just 3 feet and 6 feet away from the 328. The 2nd version includes 10 feet as well. My room starts to impact the frequency response more at a distance of 10 feet.
3 and 6 feet REW measurements
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3, 6 and 10 feet REW Measurements
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Yes, sorry, it wasn’t my intention to have you remeasure everything. As @BYRTT said, as long as you saved the measurements in REW, you can just load them back in and reformat them by adjusting the scale on the axis through the Limits button on the top right, and the smoothing is adjusted through the Preferences icon (the gear), a little further to the right.
However, I think that the comparison that BYRTT created shows that your measurements were remarkably close to Amir’s, although you seem to have got the better bass extension that people expected from these.
That’s awesome. Thank you so much for doing that. Ok, one very last question from me: approximately how large is your listening room?Below is the REW image for the Revel F328Be in two versions with the 20Hz to 20kHz, and the Y-axis from 50 to 100dB settings. The first version is just 3 feet and 6 feet away from the 328. The 2nd version includes 10 feet as well. My room starts to impact the frequency response more at a distance of 10 feet.
3 and 6 feet REW measurements
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3, 6 and 10 feet REW Measurements
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That’s awesome. Thank you so much for doing that. Ok, one very last question from me: approximately how large is your listening room?
Thanks again!
It’s a very important difference with about 2dB up to. 300hzAdjustment to the Revel F328Be NFS measurement by Amir can be found here: https://www.audiosciencereview.com/...orrection-for-klippel-nfs-measurements.22493/
These measurements align with the extended bass I am experiencing with the Revel F328Be. With strong bass response down to 29Hz I have less need for my two VTF-3 MK5 HP Subs.
The mid bass punch of the Revel F328Be is stronger and tighter than any other speaker I have auditioned. When I first heard it, it made me take a double take, raise my head and go "WOW". The scale of hi-def, articulate mid bass punch offered by the 51" F328Be is extraordinary and the speaker handles the load effortlessly.
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So what crossover frequency should one use with these speakers for Home Theater?
Does it make sense to cross them over at 80Hz?
So what crossover frequency should one use with these speakers for Home Theater?
Does it make sense to cross them over at 80Hz?