Remember that for a smooth bass experience in a room - especially over a larger seating area, you actually only need one subwoofer that plays really deep, and the other subwoofers mostly need to equalize the bass between 35 and 90Hz - depending on how deep your mains play - and therefore do not need to play as deep - saving a lot of power, space and price.
Dayton is making some awesome drivers. One of my friends have 4 - one RSS390HF in each their 120 liters reflex cabinet - and they play really well - and loud. But you need some powerful amplifiers to push them.
I have 2 RSS390HF in each 90 liters closed with 2 x 700W @8 ohm - which is very tight and deep. Also remember that your specific room, either "enhance" or smooth the bass, depending on how it is build and damped. Mine - for example - is made of soft wooden floors with many open spaces connected to the listening room, which "suck" more bass, than if you live in a closed reenforced concrete room, where the bass bounce around more "lively". If people talk about room-gain, they actually talk about the amount of reflections you have in the room for a given frequency, because humans hear more bass as a result of more reflections, leading to a spike at that frequency, where all the reflections meet.
I'm not sure that you will hear much sound character below a 100Hz. A closed well build box, powerful amplifier and correct EQ, should give a lot more to the final result, than a specific driver - unless off course the driver can't deliver a given SPL and the distortion rises beyond human threshold, which is quite a lot more, at lower frequencies.
Dayton is making some awesome drivers. One of my friends have 4 - one RSS390HF in each their 120 liters reflex cabinet - and they play really well - and loud. But you need some powerful amplifiers to push them.
I have 2 RSS390HF in each 90 liters closed with 2 x 700W @8 ohm - which is very tight and deep. Also remember that your specific room, either "enhance" or smooth the bass, depending on how it is build and damped. Mine - for example - is made of soft wooden floors with many open spaces connected to the listening room, which "suck" more bass, than if you live in a closed reenforced concrete room, where the bass bounce around more "lively". If people talk about room-gain, they actually talk about the amount of reflections you have in the room for a given frequency, because humans hear more bass as a result of more reflections, leading to a spike at that frequency, where all the reflections meet.
I'm not sure that you will hear much sound character below a 100Hz. A closed well build box, powerful amplifier and correct EQ, should give a lot more to the final result, than a specific driver - unless off course the driver can't deliver a given SPL and the distortion rises beyond human threshold, which is quite a lot more, at lower frequencies.
Thanks for the detailed input! Here’s an overview of my room setup: the yellow-marked sections are open spaces covered with magnetic wooden grills, and that’s where I’m planning to place the DIY subwoofers—either 18" or 21", size is not an issue. However, the height limitation is around 27 inches. Additionally, there are 1.5-foot bass traps installed in the corners.
At the center (marked with a cross), I have the Rythmik FVX15, and at the rear, I’m using two SVS PB-2000s. Considering the size of my room, I believe going with 18" or 21" subs would help properly pressurize the space.
I prefer sealed enclosures over vented or ported ones since there are no readymade designs like GSG available in India. I’ll need to rely on a local carpenter or provide a cut-list for CNC machining to build the boxes.
So, my question is : which driver should I go for? The challenge is the limited availability— the brands mentioned earlier are pretty much the only realistic options available in India
What type of power amplifier do you have to drive the subwoofers?
Could you get the Dayton in India - or?
A RSS390HF works just fine in a closed box. 2 in front and one or two in the back - would easily pressurize this room.
But you really have to measure the result and use EQ properly - because the subwoofers works as one big "unit" below around 100Hz, because the wavelength is so long in relation to the size of the room.
You do not need to make them super pretty, when you hide them in the cinema darkness anyway. Just look at these... you can paint them easily afterwards... and just use enough glue and screws.
https://forums.audioholics.com/forums/threads/recommended-sealed-box-size-for-rss390hf-4-15.120095/
Could you get the Dayton in India - or?
A RSS390HF works just fine in a closed box. 2 in front and one or two in the back - would easily pressurize this room.
But you really have to measure the result and use EQ properly - because the subwoofers works as one big "unit" below around 100Hz, because the wavelength is so long in relation to the size of the room.
You do not need to make them super pretty, when you hide them in the cinema darkness anyway. Just look at these... you can paint them easily afterwards... and just use enough glue and screws.
https://forums.audioholics.com/forums/threads/recommended-sealed-box-size-for-rss390hf-4-15.120095/