DJBonoBobo
Major Contributor
Hello,
for some time i´m trying to get a smooth bass response in my small bedroom (14 sqm). I recently tried to throw some money at it and just wanted to share my experiences. I show you the effects of EQ, 2x PSI AVAA and a subwoofer for your amusement. Please note: Everything i say i solely about the situation in my room and i´m not trying to generalize something, so take from it what you want.
Mains: Neumann KH 310
Sub and EQ: Neumann KH 750 DSP
Room dimensions: 3,0m x 4,7m x 2,5m
Listening distance from front wall: 1,8m
Distance to mains: 1,3m (mains are close to the front wall)
There is a big window in the front wall which resonates at will and sometimes messes up the upper bass and midrange
Sub location: at front wall, 75cm from side wall
AVAA locations: front wall upper left corner + back wall upper left corner, note: the AVAA´s sensitivity had to be powered down a bit, they are not working under optimal conditions
Passive absorbtion:
- front wall: 2x corner traps basotect (2m x 0,5m x 0,4m), 1x basotect panel between mains (0,5m x 1m x 0,15m)
- ceiling: 1m x 1m x 0,12m basotect cloud
- side walls: 2x 1m x 0,5m x 0,10m basotect
- back wall: big closet (open) + 2m x 0,5m x 0,15m basotect
- also there is a bed in my bedroom (surprise!)
Frequence response (L + R measured seperately, then averaged, var smoothing), passive absorbtion alsways the same
Black: the best i could get after months of trying (with sub, AVAA and EQ)
Green: Mains only, no sub, no AVAA, no EQ
Red: Mains + sub + EQ, no AVAA
What i get from this in my room and under the given circumstances:
- Room EQ is a must, of course, even with some passive absorbtion
- AVAA doesn´t do much about the FR, the biggest effect was around 25 Hz (SBIR null from back wall is almost eaten up by the AVAA)
- Sub is needed to "fill" the grand canyon between 70 and 100 Hz, bass extension to 20 Hz is expected
Additional measurement: Spectrogramm (left channel only, sub + EQ present)
AVAA activated
AVAA deactivated:
The AVAA reduces the reverberation significantly. I tried some other positions where it had a bigger effect. Also the reduction would be better if the AVAA could work with full power. It has the potential to almost flatten it if you can use it better than me. But for me, this was the best compromise i could get.
All in all i expected a bit more from the AVAA, but i am not disappointed. They do what´s promised but they don´t work wonders. I´m keeping them because it´s definately better/cleaner with them present and it´s hard to get back once you´ve been there...
for some time i´m trying to get a smooth bass response in my small bedroom (14 sqm). I recently tried to throw some money at it and just wanted to share my experiences. I show you the effects of EQ, 2x PSI AVAA and a subwoofer for your amusement. Please note: Everything i say i solely about the situation in my room and i´m not trying to generalize something, so take from it what you want.
Mains: Neumann KH 310
Sub and EQ: Neumann KH 750 DSP
Room dimensions: 3,0m x 4,7m x 2,5m
Listening distance from front wall: 1,8m
Distance to mains: 1,3m (mains are close to the front wall)
There is a big window in the front wall which resonates at will and sometimes messes up the upper bass and midrange
Sub location: at front wall, 75cm from side wall
AVAA locations: front wall upper left corner + back wall upper left corner, note: the AVAA´s sensitivity had to be powered down a bit, they are not working under optimal conditions
Passive absorbtion:
- front wall: 2x corner traps basotect (2m x 0,5m x 0,4m), 1x basotect panel between mains (0,5m x 1m x 0,15m)
- ceiling: 1m x 1m x 0,12m basotect cloud
- side walls: 2x 1m x 0,5m x 0,10m basotect
- back wall: big closet (open) + 2m x 0,5m x 0,15m basotect
- also there is a bed in my bedroom (surprise!)
Frequence response (L + R measured seperately, then averaged, var smoothing), passive absorbtion alsways the same
Black: the best i could get after months of trying (with sub, AVAA and EQ)
Green: Mains only, no sub, no AVAA, no EQ
Red: Mains + sub + EQ, no AVAA
What i get from this in my room and under the given circumstances:
- Room EQ is a must, of course, even with some passive absorbtion
- AVAA doesn´t do much about the FR, the biggest effect was around 25 Hz (SBIR null from back wall is almost eaten up by the AVAA)
- Sub is needed to "fill" the grand canyon between 70 and 100 Hz, bass extension to 20 Hz is expected
Additional measurement: Spectrogramm (left channel only, sub + EQ present)
AVAA activated
AVAA deactivated:
The AVAA reduces the reverberation significantly. I tried some other positions where it had a bigger effect. Also the reduction would be better if the AVAA could work with full power. It has the potential to almost flatten it if you can use it better than me. But for me, this was the best compromise i could get.
All in all i expected a bit more from the AVAA, but i am not disappointed. They do what´s promised but they don´t work wonders. I´m keeping them because it´s definately better/cleaner with them present and it´s hard to get back once you´ve been there...