Post by ttocs on Jul 6, 2021 0:23:57 GMT -5
Well, just one sub dedicated to each Front is not near as good as two. The two subs work together along with each main speaker's dual woofers. It's not just the frequency response nor the ease at which the bass fills the room volume, but to my surprise I discovered that dynamics skyrocketed after adding the subs as extra woofers. Everything is better. One sub has a very limited frequency range, the second one goes a bit higher, and the dual-woofers in the speakers do the rest up to the speaker's crossover of 300Hz, but the speaker's woofers also still go down to lower than 20Hz but using a -10dB low shelf filter that's built-in. The low shelf filter is centered at 75Hz, so when I dial down to -10Hz with the control the effect rolls up to level at around 150Hz. What this all means is that each amp for each woofer is being asked to do less work and each sub is doing very little as well, so when some very impactful sound needs to be produced it's not difficult for the "system" to do.
Each Front speaker and its two subwoofers are connected via speaker wire. There is no DSP between them. The wiring goes from the amp to the speaker to the first sub to the second sub, just with the speaker wire. So the wiring is simple. Setup is more tedious. This setup is primarily aimed at music. If it were just for movies it would be a lot easier.
Since having this setup for music I've heard things in music I've never before heard in any home system. For example, I went to see Pink Floyd back in 1987 at a venue that was known for terrible natural acoustics, so the place had to install all sorts of treatments to make it usable for concerts, and even then, you had to make sure you sat in the right spots for good sound. Well, Pink Floyd used only their equipment, allllllll around the venue, and I've never before or since heard bass as accurate or thunderous as that concert! That's the concert that showed me how Dark Side Of The Moon should sound. Now, I almost have that sound with my system, it's really close. The heartbeat at the beginning of the album sounds full, deep, much louder than ever before, but is not at all bloated or mushy or strained. This put a really big smile on my face!!!
The left and right stacks are "dedicated" to the Left & Right speaker via speaker connections, but the bottom subs of each stack also carry BM and LFE via the LFE inputs of those subs, along with the sub in the back of the room - Sub5, which also handles some smoothing for the Front Left and Front Right. So the top sub in each front stack is only carrying signals for the Left or Right channels and nothing else. So for movies I'm totally ok with this setup. All I can say is that it all works very well.
Since I had enough subs to do it, I tested a stack of 3 subs and it was an improvement over just 2 subs stacked, but it's a much smaller incremental improvement so it's not anything I'll do anytime soon.
If you look at the first page of this thread you'll find the wiring diagram for the system. I use two miniDSP's. One is for BM and LFE and goes to L1/R1/Sub5, the other is only for the Front Left & Right channels for smoothing the bass in the room and goes to Sub5 and it's mostly just for a big dip that is present if Sub5 is not used.