Post by frenchyfranky on Oct 16, 2019 14:40:56 GMT -5
First off, Stereo Subs is only going to have even a chance of being better if you have two identical subs.
Furthermore, you need the ability to locate them symmetrically left/right in the room, or it won't work.
(Note that this could be next to each front speaker, or one on each side, or one in each back corner.)
In theory, the sound produced by subs is totally non-locational so it should never make any difference.
In practice, in some rooms, with some subs, and some crossover settings, sometimes you can notice a difference.
- In a VERY large room you may be able to hear some directionality even at low frequencies.
- No crossover filter is perfect, so most subs will produce a tiny bit of output at higher frequencies, which may be noticeable.
- There may be a tiny bit of distortion, or port noise, or noise from the floor vibrating, which occurs at frequencies you can locate directionally.
However, Dual Mono also has some advantages.
- You have a lot more choices about where to put your subs.
- Your two subs DON'T have to be identical and they don't need to be placed symmetrically.
- In some cases a symmetrical arrangement is bad and putting two subs in dissimilar locations is better.
(For example, if putting the sub in a corner boosts some frequencies, while the center of a wall excites other room modes, doing one of each may allow the differences to complement rather than reinforce each other.)
(For example, if putting the sub in a corner boosts some frequencies, while the center of a wall excites other room modes, doing one of each may allow the differences to complement rather than reinforce each other.)
Finally, with a lot of stereo music, the low bass is mono or mostly mono anyway... for a variety of reasons.
(This is especially true for anything that was originally issued on vinyl - where mono bass makes record grooves easier to track by your cartridge.)
And, in most modern movies, the bass is all in the LFE channel - which is mono.
(For example, if you play a typical Dolby TrueHD movie, you're not going to have true stereo bass, because all the bass is in the single LFE channel.)
Therefore these differences, such as they are, only apply to a small subset of all content anyway.
And, last and possibly least, there is another option.
Some people take two subs and stack them up together.
This gives you double the output, and avoids many of the issues with interactions between them.
(And, in that setup, you really probably want dual-mono.)
So, to resume what I understand, the summed of the left and right channel to sent to each of dual mono sub's boost a bit the bass signals output. If you have one mono Sub it received the summed of two channels and if you have dual mono Sub they received two time summed channels, equal 4 channels level. This is the reason for the heavier bass weight as I observed.
