Yes, a very good practice is to build one box and use two subwoofer driver, one on the right and one on the left side. This cancels out vibrations that blurr the sound on single chassis sub's.
I prefer to divide such a cabinet by a diagonal panel, reducing internal reflections. Two volumes also work better than one, because of driver tollerances. If you build vented, the left drivers vent may end on the right side and vice versa, so you can make them simply straight.
For example, the "Reckhorn 25cm" would need 2x40 liter volume with an 10x5cm , 50cm long vent to have a -3dB point of 30Hz.
Such a cabinet could be 40x40x65cm. Not small, but as you would place it on the ground, against a wall, not dominating in a room and very low reaching.
I just convinced my son that he needs a big subwoofer, in his tiny apartment. The S45-2s with the GU50 amp will be delivered next week. The subwoofer in due time...
That's why I asked for the size of the listening room. For a very small room, like up to 15 square meter, a single chassis should be enough. The good thing about a decend subwoofer is, you do not throw it away if you move to a larger flat. Too small subs are wasted money and DIYS work.
On the other hand, if you use a DSP, even a small room is no problem with a large, double sub.
What I like most about subwoofer is the use of a high pass for existing loudspeaker. Any speaker I know sounds better if is relieved from frequency lower than 80-120 Hz. Even with low volume the sound get's another dimension.
If room is a problem, a nice amp for very little money, driving two sub chassis at moderate and higher volume, is the Aiyma 07. It's €58 including a power supply, from aliexpress https://www.aliexpress.com/item/1005005989923885.html All in for EU customers. Ridiculous price for what you get and hear.
A very nice amp, not only for a sub. Excellent sound you will not match with many amps even 20x the price. Power output depends on the power supply. The one you can include at Ali is a good allrounder. If you order be sure to take the option with PS.
On the other hand, if you use a DSP, even a small room is no problem with a large, double sub.
What I like most about subwoofer is the use of a high pass for existing loudspeaker. Any speaker I know sounds better if is relieved from frequency lower than 80-120 Hz. Even with low volume the sound get's another dimension.
If room is a problem, a nice amp for very little money, driving two sub chassis at moderate and higher volume, is the Aiyma 07. It's €58 including a power supply, from aliexpress https://www.aliexpress.com/item/1005005989923885.html All in for EU customers. Ridiculous price for what you get and hear.
A very nice amp, not only for a sub. Excellent sound you will not match with many amps even 20x the price. Power output depends on the power supply. The one you can include at Ali is a good allrounder. If you order be sure to take the option with PS.