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klipsch

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klipsch last won the day on February 2

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About klipsch

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  1. There are 6 18s in that picture (2 more 18s in the room not pictured). In that picture, two D.O. sealed on top of the skrams and 1 D.O. sealed under the center channel facing sideways. Another dual front firing config behind 1st row. I thought the details were in this thread right around the previous shared link. I've configed as best as possible the method of placement I cannot currently find. It involves placing the subs at each of the 1/3 height and width points (along with their intersections) in the front and back of the room.
  2. Have moved things a bit since then, but basic idea... http://data-bass.ipbhost.com/topic/742-riccis-skram-subwoofer-files/?do=findComment&comment=20883 Edit: Also running the SKRAMs wide open - no ports blocked
  3. I started off with an independent coverage implementation idea (avoiding mixing) with a blending / crossover around 32hz. 18s would cover 0 to ~30 and skrams for ~30 upwards. Ended up with mixing as that enhanced the "chest thumping" and gave a flatter response at multiple listening positions. IIRC (have been enjoying the configuration for a while not and haven't messed with settings), the sealed 18s cover 0 to 60hz and skrams cover 25 to 110 with my mains covering 80 and up. Took the expected measurement path of adding one speaker of each type at a time and taking 3 measurements in different listening positions each to ensure no nulls and instead got the expected dB gain based on the watts/speaker added. I would measure 1 18. Measure 2nd 18 independently. Add 1st 18 and 2nd 18 together - measure. Ensure ~6db gain across three listening positions by adjusting delay, etc. Measure 3rd 18 independently. Add 3rd 18 with 1st and 2nd 18. Ensure ~3db gain. Repeat until all 8 18s are blended achieving proper gain. Measure Left speaker independently. Measure right independently. Blend L & R together properly. Blend L with all blended 18s properly. Add R and ensure results are proper compared to when R and L were together only. Measure SKRAM 1. Then SKRAM 2. Blend SKRAMS. Now add SKRAMs to all. Ensure dB gains via measurements. I believe I got best results doing EQ for each group independently except for L & R. So EQ is global across the 18s group. Also global across the skram group. Independent for L and R. Then blend all together EQ wise. Enjoy the awesomeness. Edit: I should add that if I built 2 more skrams, I may do things differently. However, as they say, there is no replacement for displacement - having more displacement in different locations for the same frequencies really helps me to dramatically smooth the response across multiple listening positions in the theater. I could selfishly make the MLP for me be perfect (+-0.5dB) with the non-overlapping approach. However, with the overlapping approach, the front 3 seats achieve a very similar response and the back 4 seats aren't too bad, but with a +-5db range in the back VS +-2db range in the front.
  4. My 2 skrams are mixed with 8 sealed ht18s. Sounds great to me
  5. klipsch

    Vortex & Kraken

    There's the even cheaper route as well https://www.parts-express.com/dayton-audio-pss555-8-21-pro-subwoofer-with-45”-voice-coil-8-ohm--295-050
  6. klipsch

    Vortex & Kraken

    Guess I should have linked the Kraken as well https://www.parts-express.com/dayton-audio-hts545he-4-kraken-21-high-excursion-subwoofer-with-5-voice-coil-4-ohm--295-054 Thiele-Small Parameters Resonant Frequency (Fs)26.3 Hz DC Resistance (Re)3.8 ohms Voice Coil Inductance (Le)8.5 mH Mechanical Q (Qms)7.9 Electromagnetic Q (Qes)0.29 Total Q (Qts)0.28 Compliance Equivalent Volume (Vas)6.32 ft.³ Mechanical Compliance of Suspension (Cms)0.054 mm/N BL Product (BL)38.3 Tm Diaphragm Mass Inc. Airload (Mms)676g Maximum Linear Excursion (Xmax)21 mm Surface Area of Cone (Sd)1525 cm² Materials of Construction Cone MaterialTreated Paper Surround MaterialFoam Voice Coil Wire MaterialCopper Voice Coil FormerFiberglass Basket / Frame MaterialCast Aluminum Magnet MaterialFerrite
  7. Quickly searched for "Vortex" and only found two hits here that were not related: https://www.parts-express.com/dayton-audio-pss545he-4--vortex-21-pro-subwoofer-with-5-voice-coil-4-ohm--295-052 Looking forward to some hands-on impressions and measurements - seems like a decent price and spec Thiele-Small Parameters Resonant Frequency (Fs)28.8 Hz DC Resistance (Re)3.8 ohms Voice Coil Inductance (Le)8.2 mH Mechanical Q (Qms)7.28 Electromagnetic Q (Qes)0.28 Total Q (Qts)0.27 Compliance Equivalent Volume (Vas)7.49 ft.³ Mechanical Compliance of Suspension (Cms)0.06 mm/N BL Product (BL)35.5 Tm Diaphragm Mass Inc. Airload (Mms)511.2g Maximum Linear Excursion (Xmax)21 mm Surface Area of Cone (Sd)1590 cm² Materials of Construction Cone MaterialTreated Paper Surround MaterialCloth Voice Coil FormerFiberglass Basket / Frame MaterialCast Aluminum Magnet MaterialFerrite
  8. IIRC a loopback (e.g. Soundcard) is not needed for measuring latency between one speaker and another. If wishing to determine latency of specific components with only one speaker then a loopback is needed to determine the time from the sound source to the recorded sound of the microphone from the speaker. TLDR - there should be one known source to compare latency to for another source. Between speakers, one speaker becomes the source. Between components, need some way to measure one component as the source to compare against the other measured. (assumes measurement latency will be offset / equal between measurements)
  9. I've been running an xbs / sinbosen 240v FP20000Q ($818 USD shipped to door) for only 7 months, but in a home theater seating driving 2 skrams and several sealed stereo integrity HT18s across the 4 channels. Bassthathz in AVS has over a dozen xbs/sinbosen of different models to drive his gear. He seems to be happy with them as well. They are abused for enjoyment to an extent, but not physically with being on tour.
  10. Guessing the Chinese clone option is not one you want to take?
  11. Minidsp are a good way to go. It may already be known, but a software license is needed with the minidsp hardware. If buying used or new, it can sometimes not be included. I've been running a 2x4 for 10+ years and a 10x10 for over 7.
  12. Yes, the 6mm is supposed rated super conservatively. I've read so much conflicting information from ported to sealed, etc. It seemed that sealed is the no-brainer decision via bassthathz if you are going to buy more than 2 pa460s... Trying to find alternatives to that evidence...
  13. Sorry for any confusion. The examples above were for 8 and 4 drivers respectively. I just dumped them all in one big box each for simplicity. Making 2 boxes with 2 drivers each (4 total drivers) should be the same / similar enough as the 4 drivers in one bigger box (assuming phase and such are all aligned). 300 watts x 8 drivers = about the 2400 watts 300 watts x 4 drivers = about the 1200 watts Each PA460 supposedly does best in about 2.1ish cubic feet sealed. These drivers are really shallow so putting 2 dual opposed or wedged as suggested should open up multiple different box sizing opportunities. I've experienced many of the MBM equivalents. It has been my experience that, generally speaking, those that love them have bad room nulls or nodes. They set the modules up closer to the seats (or behind the seats) to attempt at overcoming the room issues. Setting up their room in the room simulator of REW and spending 5 minutes demonstrating the basics in the software usually shows them the issue(s) in their rooms quickly. Some have moved their couch 10 inches forward and problem solved without needing the MBM. Those that like them usually are starting out earlier in the hobby / early DIYers / are used to commercial subs / etc.. That all sounds negative after I just re-read it, and that was not my intention. The MBMs work as designed. Coming from skrams, I'll be curious to see what you think and how things work out in your room.
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