If you are going to use a sub two or more is the way you should go.
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To put it simply, using more than one sub helps cancel out peaks and nulls. With one subwoofer, you may have spots where there is too much bass, and not enough in others. Four small ones would be much better than one big one. Do a search here for "swarm", lots of discussion and information available.
Not to mention, you have a pretty large room.
Oh boy, I sure would like to hear those Kanta 3’s. Extending their bass, for music sometimes? For video sometimes? Complicated!!!
My advice: Stereo Pair of Subs located with the mains to maintain imaging. Careful control of crossover and volume. Self-powered, independent of the video system, i.e. extended bass ALWAYS.
As you must already know with your speakers, low bass is more directional than many think, and it has been pointed out, the narrower overtones of the wide low bass fundamentals give directional cues to the fundamental’s location.
The better the mains, the harder it is to achieve seamless extension, and you probably cannot personally listen, likely buy un-heard, I would want full return/refund (not store credit).
If ONLY for Video, adding bass effects i.e. Dinosaur Stomps, a single self-powered sub will work, balanced to be unaware of location or contribution unless you turn it off. But ....
When via 5.1, using sub out, then when using ’direct’ which is often 2 channel, or 2 channel mode, often the content’s original format, the sub will be off, no extra bass. I very often find the cable company or my AVR send/invent/use surround without me choosing it, and 2 channel sounds better. Therefore, for ANY home theater, you still need a decent amount of bass from your mains.
For stereo music or stereo video, extended bass always, a stereo pair of subs is needed, and very carefully chosen and controlled crossover/volume to work seamlessly with your existing mains. They need to be self-powered to maintain independence from AVR system.
I suggest you further arm yourself for evaluation.
piano lows, bass, drums: I prefer using stand-up bass to evaluate bass: quality, control, directionality.
scroll down to chart of frequencies
unique double bass album
mingus dynasty, two bass players, opposite channels in 7 piece band
Duets, alto sax and upright bass only.
aside from wonderful music, the full range and textures of Red Mitchell’s bass are there for every track, and a long bass solo on the last 9 minute track, incredible. No masking of drums, guitars ...
my music system: horns with 15" woofers, no sub
my video system, single self-powered sub, via 5.1, mains have 10" woofers for bass without sub, sub far from mains
my office system, bookshelf with single self powered sub, always in. music and video from 27" monitor/pc
good luck extending those beauties. btw, manufacturer probably has some advice, perhaps knows what other owners have tried/done.
I just auditioned a pair of RSL Speedwoofers. This is a compact 10 inch sub that has to be the best value sub for the money I have heard. It can reach down solidly to 25hz, is compact, all for a bagain price of $400. Shipping and return shipping included! So get 4 of these subs and you ought to have effortless, smooth bass well suited for a 50/50 split of music and HT. What have you got to lose? Highly doubt you would return them
I have 4 systems - main (living room), office, bedroom, computer room. My living room is pretty big and opens into my kitchen. 4 subs there. All the others have a single sealed sub and sound great.
If your goal is gut punching bass, you need big powerful subs. That's not what I'm trying to achieve when listening to music (although I have the gear to do that). If there's bass content in the music, I hear it much like it would sound live. And when there's some really deep bass, it is visceral.
The OP has a big room. Multiple subs are the easy button for well integrated bass if there's room and budget.
Elliot sadly it doesn't reach deep enough
compared to the Revel studio2 that I auditioned. I've just recently made the purchase, this is my first hi fi system. To be honest, I'm still trying to decipher your response since I am relatively new to speakers. By the way upgrading later on isn't an option since my dad just wants a one and done system.
Thanks for your suggestion corelli, sadly, there aren't any RSL dealers here in Philippines. Svs, rel, and PSA are the only ones available to me. Also, my maximum budget that I am allowed to spend is around 77k php which is around 1500usd. Also svs subs are like almost double the srp here compared to the US, so I can't really go 4 subs unless I go for klipsch.
I have quite a large room (28'x15x10-14', my ceiling slopes a little). I've rearranged this room a bunch of times and have had to find different places for my sub (REL T9). I only use it for listening to music (no TV). I've used the step by step set-up instructions from REL every time I've rearranged this room. I've been able to get amazing performance out of this sub every time. I think this speaks to the quality and thoughtfulness that they put into their products. There's one additional step I take setting up my REL. If you go down that road, DM me and I'll tell you about it.
What about HSU subwoofers? Reading the fine print on their webpage they ship outside of the US and take PayPal and wire transfer (etc.), but some coordination needs to be done before the purchase by contacting them directly.
If under $1500 you could purchase two 12” VTF-2s + shipping or one 15” VTF-3 + shipping. Shipment will be from California. Ported and sealed mode for 50/50 music/movies if desired.
I got the DEBRA array (4x 10” passive subs powered by 2x 1000w amps in my 15x20 room. I’ve tried upgrading speakers and still no bass (Tannoy Turnberry). Turns out it’s because of the standing waves in the room. I tried changing speaker location and listening spot- a little improvement. Once I added the DEBRA, completely got rid of my bass problems and blends perfectly. Best money spent on my system so far.
One of the suggestions is build your own subs. Your own homemade DEBRA/swarm system. Here is the amp used:
And a cheaper alternative:
The setup instructions are on the "debra" website. Just need to build four small passive subwoofers. Build from scratch ( or pay a local carpenter/cabinet maker) with plans or buy a kit for 8" or 10" subs.
When I brought the kanta 3 home I loved the mids and highs but the bass was a mess, +10db at 100hz and -20 at 80 hz with a little recovery around 60 hz b4 falling off the chart. My room. Moving them to the long wall and playing with boundary placement did smooth them out a lot, but they never did offer much below 70 hz in my room. I would try a single sub between the speakers first and if that don't work then buy the second. A flat measuring speaker isn't necessarily desirable and the Kanta only needs help with the bottom 2 octaves.
First of all you need a continuous phase control, polarity control and multiple crossover slopes.
Second you need to roll the lows out of the mains. Doubly important with ported mains. This can be a simple 1st order capacitor crossover to the main amp.
Third, a sub with a control app to equalize the bottom to the room can do wonders.
Among others, the Martin Logan x series have all of the above.
see http://www.ielogical.com/Audio/SubTerrBlues.php for setup and general sub info. The Finally graph shows the proof of the pudding is in the eating.
I just added dual Rythmik L22s to support my Tekton Pendragons, and I’m very happy with the sound after weeks spent integrating. As stated above, consider rolling off the mains. I use a K231 active crossover at 70-80hz, and this creates incredibly powerful and tight bass from the subs, while allowing the mains to offload the lowest freqs, which cleans up the entire midrange. This method is challenging, and it can sound weak down low until everything is properly dialed in and integrated. Then you have deep bass, clean low-mids, clearer voices, and a sense the bass is truly emanating from the same world as the rest of the music. It’s labor intensive to dial in, but I found it way better than running the mains full range and reinforcing with subs, which led me to different flavors of muddy midrange. This is very system/room dependent, and may not work for you, but hope it helps! Getting bass right makes everything better.
I bought 2 SVS sb2000 subs on sale for $650 each (price reduced when they brought out the sb2000 pro model). They compliment my Martin Logan 60XT towers. I set the crossover at 80HZ and let the subs handle frequencies below that. Room placement is not optimized and I seldom play music real loud. I’m not sure I have them dialed in correctly — read somewhere that mains show be set at 20 HZ and let the subs handle below that (?). Don’t know if that advice works or not.