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Post by audiophill on Jun 20, 2017 12:07:46 GMT -5
My Power Sound Audio Triax triple 15" 4000 watt rms is my one and only sub I will ever need that does both my ht and stereo.
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Post by MusicHead on Jun 20, 2017 16:33:24 GMT -5
Single Rythmik L12, 12" sealed. Excellent with music and more than respectable with movies. I use it for both, no complaints. Room is approx. 17x13 with 8' ceiling.
The sub is placed slightly to the right of the front main right speaker, directly against the wall behind it, but about 3' from the right side wall. It works like a charm with my Ascend CMT-340SE Mains.
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Post by Boomzilla on Jun 23, 2017 18:17:13 GMT -5
An interesting factoid about subwoofers:
If your main speakers are highly efficient, then your subwoofer is just loafing with its gain turned down significantly below the halfway mark.
In this case, your sub(s) have literally humongous (technical audio term) amounts of headroom available. Your subs' internal plate amps are coasting with not so much to do even though the bass can be both loud and clear.
So what to do with that headroom? You can burn a little of it with a room correction system but if your speakers are HIGHLY efficient, then you've still got power to spare.
Since my sub is sealed, and since its gain pot is at less than 20%, even after room correction, I've opted to add a +6 dB boost (Q=1.9) at 12 Hz. You wouldn't think that this would make a bit of difference with "normal" music, but it does. The sub now has flat response to less than 15 Hz. Drums sound punchier, synth grunts are more dynamic, and even bass guitars benefit.
Further, relieving the satellite speakers of any significant bass duties lowers their distortion and increases their apparent resolution significantly.
I wouldn't want to try this much boost if my sub's gain pots were anywhere near the 50% level, but I can get away with it because of the very sensitive Pendragon satellites.
Just a FYI...
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Post by copperpipe on Jun 23, 2017 18:28:29 GMT -5
I'm a little lost Boomzilla; if your mains are highly efficient, then your sub would have to work HARDER to match the output, not easier. It's your mains that will be loafing...? ..or, am I just feeling the effects of not enough coffee on a friday afternoon?? |
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Post by monkumonku on Jun 23, 2017 19:17:57 GMT -5
I'm a little lost Boomzilla; if your mains are highly efficient, then your sub would have to work HARDER to match the output, not easier. It's your mains that will be loafing...? ..or, am I just feeling the effects of not enough coffee on a friday afternoon?? Actually, unless the sub is powered by the same amp that powers the speakers, why should the efficiency of the mains make any difference at all? It seems to me that the main factor is how loud do you play your music, and if you prefer heavy, neutral (blended) or light bass. If the sub and speakers do not share a common power source then the efficiency of one shouldn't affect the other. |
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Post by Boomzilla on Jun 23, 2017 22:21:19 GMT -5
I'm a little lost Boomzilla; if your mains are highly efficient, then your sub would have to work HARDER to match the output, not easier. It's your mains that will be loafing...? ..or, am I just feeling the effects of not enough coffee on a friday afternoon?? Nope - copperpipe - you're exactly right. As satellite sensitivity increases, the sub SHOULD have to be turned higher and higher on its gain pot to compensate. My theory as to why I'm running this sub at 23% gain with high sensitivity satellites is that I'm running stereo bass channels to the sub, each on their own RCA cable. Feeding both input jacks on the sub with signal makes the sub play louder than it would have with a single (mono) input. But whatever he reason, this thing is (so far) hard to find fault with. I've paid twice this for a sub before, and this PowerSound rivals or betters that one. |
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Post by Boomzilla on Jun 23, 2017 22:26:35 GMT -5
Actually, unless the sub is powered by the same amp that powers the speakers, why should the efficiency of the mains make any difference at all? It seems to me that the main factor is how loud do you play your music, and if you prefer heavy, neutral (blended) or light bass. If the sub and speakers do not share a common power source then the efficiency of one shouldn't affect the other. In fact, the sub IS powered by the same PREAMP that is powering the speakers. But the relative gains of the satellite amp and the subwoofer amp make the biggest difference. If a 0.5 volt signal to the satellite amplifier produces 90 decibels at the speakers, then that same 0.5 volt signal must be adjusted to also produce 90 dB at the subwoofer. Now if I have sensitive speakers, that same 0.5 volt from the preamp now produces 100 dB at the speakers. I now have to turn the gain UP on the sub plate amp to make the sub also produce 100 dB. Clear as mud? In the end, the preamp output voltage must produce identical (or close) volumes at both the speakers and the sub(s). |
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Post by monkumonku on Jun 24, 2017 0:26:45 GMT -5
Actually, unless the sub is powered by the same amp that powers the speakers, why should the efficiency of the mains make any difference at all? It seems to me that the main factor is how loud do you play your music, and if you prefer heavy, neutral (blended) or light bass. If the sub and speakers do not share a common power source then the efficiency of one shouldn't affect the other. In fact, the sub IS powered by the same PREAMP that is powering the speakers. But the relative gains of the satellite amp and the subwoofer amp make the biggest difference. If a 0.5 volt signal to the satellite amplifier produces 90 decibels at the speakers, then that same 0.5 volt signal must be adjusted to also produce 90 dB at the subwoofer. Now if I have sensitive speakers, that same 0.5 volt from the preamp now produces 100 dB at the speakers. I now have to turn the gain UP on the sub plate amp to make the sub also produce 100 dB. Clear as mud? In the end, the preamp output voltage must produce identical (or close) volumes at both the speakers and the sub(s). I see what you're saying now. So unless you can adjust the relative levels going out from the preamp then the sub gain needs to be higher. |
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Post by monkumonku on Jun 24, 2017 9:38:41 GMT -5
Actually, unless the sub is powered by the same amp that powers the speakers, why should the efficiency of the mains make any difference at all? It seems to me that the main factor is how loud do you play your music, and if you prefer heavy, neutral (blended) or light bass. If the sub and speakers do not share a common power source then the efficiency of one shouldn't affect the other. In fact, the sub IS powered by the same PREAMP that is powering the speakers. But the relative gains of the satellite amp and the subwoofer amp make the biggest difference. If a 0.5 volt signal to the satellite amplifier produces 90 decibels at the speakers, then that same 0.5 volt signal must be adjusted to also produce 90 dB at the subwoofer. Now if I have sensitive speakers, that same 0.5 volt from the preamp now produces 100 dB at the speakers. I now have to turn the gain UP on the sub plate amp to make the sub also produce 100 dB. Clear as mud? In the end, the preamp output voltage must produce identical (or close) volumes at both the speakers and the sub(s). On second thought, the sub really doesn't need to work harder. The efficiency of the mains does affect how high you have to set the gain for your sub, but regardless, it still would take the same preamp voltage and same output of watts for the sub to hit, say 100 db. If you have really efficient mains and a really inefficient sub, then it becomes a problem of a possible mismatch, in which the output from the preamp to the sub is not high enough to drive it to the right level, because your mains are so efficient that they get too loud at that required level for the subs. But I don't think that means putting any additional strain on the subs because of efficient or non-efficient main speakers because the sub uses X amount of power to reach Y decibels, regardless of how efficient the mains are. |
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Post by brubacca on Jun 24, 2017 10:04:47 GMT -5
I have struggled with subwoofer integration. I think that it relates to using them in shared spaces with limited placement options. Couple that with a reluctance and being inept at adjusting the various settings (phase angle, blah blah blah), I have never enjoyed a sub in my 2 channel setup although I beleive that one would help greatly.
For HT I use a 8" Martin Logan Dynamo., it could also be integrated better. I would like to try a Sub with its own DSP for my 2 channel, but haven't found one that floats my boat or budget.
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DYohn
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Posts: 18,494
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Post by DYohn on Jun 24, 2017 10:47:45 GMT -5
Yes. I only turn on the big IB for certain movies in the HT. I have a stereo set of OB subs for the living room system for music or TV, and a sealed sub as part of the separate 2-channel system. Different systems for different applications.
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Post by novisnick on Jun 24, 2017 10:52:15 GMT -5
Yes. I only turn on the big IB for certain movies in the HT. I have a stereo set of OB subs for the living room system for music or TV, and a sealed sub as part of the separate 2-channel system. Different systems for different applications. Thats my song DYohn , my two channel incorporates a set of Klipsch 308's when I want them and choice of speakers with a switch. My HT system uses a set oF PSA XV12se. Edit; yep, two channel has sealed subs and HT incorperates ported subs. |
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Post by adaboy on Jun 24, 2017 10:54:30 GMT -5
Yes. I only turn on the big IB for certain movies in the HT. I have a stereo set of OB subs for the living room system for music or TV, and a sealed sub as part of the separate 2-channel system. Different systems for different applications. What are OB subs? Not familiar with that term. Thanks |
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DYohn
Emo VIPs
Posts: 18,494
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Post by DYohn on Jun 24, 2017 10:55:57 GMT -5
Yes. I only turn on the big IB for certain movies in the HT. I have a stereo set of OB subs for the living room system for music or TV, and a sealed sub as part of the separate 2-channel system. Different systems for different applications. What are OB subs? Not familiar with that term. Thanks OB = Open Baffle. |
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Post by novisnick on Jun 24, 2017 11:31:51 GMT -5
brubacca , Have you tried this vedioo or the one below it?
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Post by novisnick on Jun 24, 2017 11:36:55 GMT -5
My Power Sound Audio Triax triple 15" 4000 watt rms is my one and only sub I will ever need that does both my ht and stereo.  |
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Post by novisnick on Jun 24, 2017 12:33:29 GMT -5
REW & subwoofer
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Post by Boomzilla on Jun 24, 2017 13:03:50 GMT -5
My Power Sound Audio Triax triple 15" 4000 watt rms is my one and only sub I will ever need that does both my ht and stereo. Breast mode? And no, I'm NOT posting images! My score on the "Liberated Woman Approval List" is already abysmal. |
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