#11
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Totally agree. Just because a speaker can go all the way down to, say, 30hz, that does not mean that you may not need help above that frequency. Measurements can tell you how your speakers interact with YOUR room. You can use the sub to help your speakers compensate for issues/deficiencies that arise from the speakers, their location, and/or their interaction with your room. |
#12
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Regarding the roll off point wouldn't that be determined by the speaker more than the room. I appreciate there can be peaks and nulls but I would have thought that a sub is a fairly blunt instrument - wouldn't room treatment (bass traps etc) be a better solution to deal with that kind of issue ? |
#13
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Yes. If you have already decided to run your mains full range and/or do not have a crossover then the question is only how high can you set the sub before it overlaps too much. The crossover allows you to control the low and high pass filters among other controls and makes blending your sub easier. It also allows the sub to be less of the blunt instrument you mentioned.
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Main Equipment: Kharma Elegance dB11-S, JL Audio F113v2 X 2, Block Audio Line & Mono SE Amplification, Bricasti M21 DAC, Antipodes Kala K-50 Server, Clearaudio Performance SE. Satisfy tonearm & Maestro wood MM cartridge. Power: Shunyata Everest 8000, Sigma XC v2, Sigma NR v2, Block Audio PCs, Defender, ADDPowr Wizard Grounding: Shunyata Altaira CGS - 4 X Alpha CGS cables, Network : Supra Cat 8+, Twin (Nenon) Modified Buffalo GS2016 Switches, Keces P3 LPSU, Cables: Wireworld Platinum 8 USB, Wireworld Platinum Eclipse 8 Speaker cables, 6M & 1M Tubulus Concentus ICs, Other: Multiple GIK products, Stillpoint Apertures, Stillpoint Minis and Ultra SS, Three 20 Amp lines, Furutech GTX - Gold outlets, Adona Rack |
#14
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If you have flexibility in the positioning of the listening seat, the speakers and the subs, you should be able to find locations that will give you a good integration throughout a larger range of frequencies. I realize that there are times when the positioning of one or several of those three elements is fixed which limits your options. You can also explore room treatments and that includes digital DSP. You can get amazing results with DSP. |
#15
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Sinatra sounding quite like that, and the opera singer as well. Sublime. Just to add to the thread, the subs should complement these capable speakers. With some experimentation you should lock the placement and crossover settings. Let us know your findings.
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#16
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I have some test tones and a SPL meter so will experiment at the weekend. I had a quick listening session last night and ended up with just under 40hz cross over and around 1/4 volume. Still open minded though.
Regarding placement there are not many options. The speakers are on the long wall of a L-shaped room. The system stack is in the front wall corner behind the right speaker (can't move this due to cable restraints). So really i only have the choice of middle of the long front wall behind the left speaker - or the opposite corner to this behind the sofa on the rear wall. I guess placement behind the listening position is a big no no (I already tried both positions and for sure more bass in the rear corner). BTW i plan to use it for movies and music. |
#17
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Hi all I measured the room from my listening position with test tones and a SPL metre.
Using the main speakers only I get the following results using a 90db SPL setting : 30hz 0 40hz -3 50hz -6 60hz -2 70hz 1 80hz -1 I tried the sub in several position, in the front corner, alongside a speaker, but the position with by far the flattest result was on the side wall mid-point between the sofa and speakers. 30hz -1 40hz 0 50hz 1 60hz 2 70hz 2 80hz 3 So I wonder whether I should cross over a little higher maybe around 50 and lower the volume slightly. Once the sub is properly broken in (only 10 hours so far) I will do some critical listening tests. Last edited by Mikeoz; 03-14-2020 at 12:50 PM. |
#18
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Can you tell us what unit of measure and what sound pressure meter you are using?
__________________
Main Equipment: Kharma Elegance dB11-S, JL Audio F113v2 X 2, Block Audio Line & Mono SE Amplification, Bricasti M21 DAC, Antipodes Kala K-50 Server, Clearaudio Performance SE. Satisfy tonearm & Maestro wood MM cartridge. Power: Shunyata Everest 8000, Sigma XC v2, Sigma NR v2, Block Audio PCs, Defender, ADDPowr Wizard Grounding: Shunyata Altaira CGS - 4 X Alpha CGS cables, Network : Supra Cat 8+, Twin (Nenon) Modified Buffalo GS2016 Switches, Keces P3 LPSU, Cables: Wireworld Platinum 8 USB, Wireworld Platinum Eclipse 8 Speaker cables, 6M & 1M Tubulus Concentus ICs, Other: Multiple GIK products, Stillpoint Apertures, Stillpoint Minis and Ultra SS, Three 20 Amp lines, Furutech GTX - Gold outlets, Adona Rack |
#19
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Hi it’s a Silverline meter and I’m selecting range 90 db
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#20
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I understand. Those numbers are from 90dB...
Yes, your second set of numbers is flatter. Keep measuring up to ~300Hz and see how flat it remains. I would also adjust the volume of your system to closer to 75dB when you measure.
__________________
Main Equipment: Kharma Elegance dB11-S, JL Audio F113v2 X 2, Block Audio Line & Mono SE Amplification, Bricasti M21 DAC, Antipodes Kala K-50 Server, Clearaudio Performance SE. Satisfy tonearm & Maestro wood MM cartridge. Power: Shunyata Everest 8000, Sigma XC v2, Sigma NR v2, Block Audio PCs, Defender, ADDPowr Wizard Grounding: Shunyata Altaira CGS - 4 X Alpha CGS cables, Network : Supra Cat 8+, Twin (Nenon) Modified Buffalo GS2016 Switches, Keces P3 LPSU, Cables: Wireworld Platinum 8 USB, Wireworld Platinum Eclipse 8 Speaker cables, 6M & 1M Tubulus Concentus ICs, Other: Multiple GIK products, Stillpoint Apertures, Stillpoint Minis and Ultra SS, Three 20 Amp lines, Furutech GTX - Gold outlets, Adona Rack |
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