Also I think. I recently put my Wharfedale 12 2 up for sale, because I bought Q350 and like its tonal balance more. For me, both are high-quality acoustics, but Q350 It's just right for me in my room. Despite the fact that I had and have a lot of different acoustics and studio monitors, more expensive and cheaper. There is something to compare.
still leaves a question whether the raw driver has inherent problem of rubber surround's resonance, which would naturally limit maximum improvement possible to achieve via other means like upgrading cabinets and crossover filter.
Its KEF's value or say cheapest series, therefor it should be natural its not the most top notch bracing and expensive round overs or expensive components used here and of course a diy'er could set in on that front, that said im pretty shure any work in that area wont change anything on the pro graphs published here, the culprit is the most often seen here at site and coused by port noice into 500Hz-2kHz problem area, KEF could of couse improve that point but are probly not interested because a value series should differ from their better series so we get something for our money pick their higher series. Because the surround's KEF use looks the same from value series up to top series my guess is stop speculate in that area as a inteference thing, but if you want more reasons than port noice being responsiple alone for the interference in that 500Hz-2kHz area, good old stuff as diffraction + mismatched timing + mismatched XO slope's could add up to the port noice seen in the problem area 500Hz-2kHz.
Frequency sweep the speakers and you will locate the spot(s) where this noise is coming from.
Yep, right here: https://pierreaubert.github.io/spinorama/eqs.html
I've since stuffed my Q350's with damping material (...cotton shirts) & it actually seems to have worked at eliminating rattle from one one of them completely. The other didn't work as well for some reason, but now has to be several DB louder than I would listen to trigger the buzz, so the frequency generator isn't triggering anything right now unless the volume needs to be higher than I can handle to bring it out.Frequency sweep the speakers and you will locate the spot(s) where this noise is coming from.
Yeah, don't push it if you are not comfortable but it can go fairly loud for the bass frequencies and the mids. For the tweeters don't go screaming loud or you might damage the tweeter. Most people back off when those frequencies start coming out.
It was mainly aimed at the low frequencies.
I don't know a huge amount about speaker design, but I think if you fill the entire inside space with that material (like you have done), then this is surely gonna dramatically change the tuning of the whole speaker. Your frequency response would probably be nothing like that measured by Amir, which is problematical......you might have been better off using Amir's measurements of the speaker to create an Anechoic EQ of the speaker to fix any of it's frequency response issues, rather than filling the speaker with material & now you don't know what it's frequency response is.Hello friends!
I've bought KEF Q350 and I was very dissapointed with "boomy" sound. I felt strong vibrations on side walls of the speakers by my hand even on low volume. I did many efforts to place speakers in to right position but the sound was boomy. Nothing helped.
I agree 100% with Amir's review.
So, I decided to trust Amir's opinion and have bought extra Revel M16. I spent some evenings to compare speakers with ampifier Atoll AM200se. M16 has more "soft" and neutral-pleasent sound, but in my small room they also give too extra bass. Not boomy, but not plesent for TV or cinema...
Aa result, I have bougt 15 sq.m. of synthetic winterizer (100 g/m^2). I removed a speakers and very tightly fill boxes by material. I spent around 5 sq.m. in to each box.
Now Q350 seems for me not boomy at all. Probably I hear sometime little "dryness". I think that now tonallity is very closely to HD650. I able to listen all my music collection without headache and I very like Q350. I don't feel any vibrations from the side walls of Q350.
And now I have difficult choice beetwin M16 and Q350 - I want keep both pair
View attachment 237126
I stuffed my Q350's with cotton & subjectively haven't noticed a difference in their sound other than that it got rid of the midrange resonances I heard on a few ambient tracks at higher SPL's & the cabinet sidewalls vibrate significantly less now. It may have changed the frequency response on paper, but not a noticeable night/day difference.
Hello friends!
I've bought KEF Q350 and I was very dissapointed with "boomy" sound. I felt strong vibrations on side walls of the speakers by my hand even on low volume. I did many efforts to place speakers in to right position but the sound was boomy. Nothing helped.
I agree 100% with Amir's review.
So, I decided to trust Amir's opinion and have bought extra Revel M16. I spent some evenings to compare speakers with ampifier Atoll AM200se. M16 has more "soft" and neutral-pleasent sound, but in my small room they also give too extra bass. Not boomy, but not plesent for TV or cinema...
Aa result, I have bougt 15 sq.m. of synthetic winterizer (100 g/m^2). I removed a speakers and very tightly fill boxes by material. I spent around 5 sq.m. in to each box.
Now Q350 seems for me not boomy at all. Probably I hear sometime little "dryness". I think that now tonallity is very closely to HD650. I able to listen all my music collection without headache and I very like Q350. I don't feel any vibrations from the side walls of Q350.
And now I have difficult choice beetwin M16 and Q350 - I want keep both pair
View attachment 237126
Hello friends!
I've bought KEF Q350 and I was very dissapointed with "boomy" sound. I felt strong vibrations on side walls of the speakers by my hand even on low volume. I did many efforts to place speakers in to right position but the sound was boomy. Nothing helped.
I agree 100% with Amir's review.
So, I decided to trust Amir's opinion and have bought extra Revel M16. I spent some evenings to compare speakers with ampifier Atoll AM200se. M16 has more "soft" and neutral-pleasent sound, but in my small room they also give too extra bass. Not boomy, but not plesent for TV or cinema...
Aa result, I have bougt 15 sq.m. of synthetic winterizer (100 g/m^2). I removed a speakers and very tightly fill boxes by material. I spent around 5 sq.m. in to each box.
Now Q350 seems for me not boomy at all. Probably I hear sometime little "dryness". I think that now tonallity is very closely to HD650. I able to listen all my music collection without headache and I very like Q350. I don't feel any vibrations from the side walls of Q350.
And now I have difficult choice beetwin M16 and Q350 - I want keep both pair
View attachment 237126
To be sure, you could have measured your speaker with UMIK before & after to see what effect it had on the frequency response. In other words you'd leave your tripod mic in the same position, measure the speaker before the mod, then mod the speaker & then place it back at exactly the same position & angle (you would have marked it), then you'd measure the speaker again. I suppose that's the only way to be sure. I can't see how filling the entire cabinet with material would not change the frequency response.
Yes, of course! This is first thing I did.
I would sort boomy bass sound from rear port and boomy resonances from cheap cabinet with thin side walls.
Good call on buying the M16 I'd say. You're still in the dark though about your mod on the Q350, you'd probably find a UMIK mic very useful, not only in checking the effects of your speaker mods, but also in finding the best speaker & listening positions for all your speakers (including your M16), as well as using it as a basis for doing RoomEQ on the bass.
