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  1. Robert_J

    In-wall vs standalone Subwoofer & in-wall vs standalone speakers

    What speakers are you planning on doing this parallel wiring? The room layout suggestions from Dolby and DTS all have single points of sound. Also, going from 8 ohms on a receiver channel to 4 ohms will sometimes cause problems. I had to start using external amps when I switched to 4 ohm...
  2. Robert_J

    In-wall vs standalone Subwoofer & in-wall vs standalone speakers

    Reviewers don't always have the same goals as you do when it comes to subs. SVS subs get almost all positive reviews and have for years so I expected to like them. I used a pair of their Plus series 12" drivers and cloned a pair of older CS+ cylinder subs. They sounded great but they did not...
  3. Robert_J

    In-wall vs standalone Subwoofer & in-wall vs standalone speakers

    I equate quality to accurate reproduction of the input signal which means flat response with low distortion. You can get quality drivers and amps for in-wall subs that give you low distortion. But will they play as low as the input signal? Do you like action movies and want to feel the...
  4. Robert_J

    SVS SB-2000 or PB-2000

    The phase isn't part of the level matching, it's part of the distance setting. Or better yet, delay. If your right speaker is closer to the mic than the left speaker, the auto calibration will add the proper delay. On an old Kenwood, I had to convert feet to milliseconds. Of the 5 speakers...
  5. Robert_J

    Help with dimensions for a new home theater setup

    Projector Central has a mount distance tool for each projector they sell. I used this tool to properly set up my main seats. My wife sat in the seat and I measured the distance to her face. Yes, I had her hold a tape measure to her face while I measured. She thought I was a nut case until...
  6. Robert_J

    Need help with Impedance settings for Zone 2 with multi-room and in-wall volume knobs

    I've never used a multi-zone system, only read up on them so I could decide if I wanted to install one. I decided against it. So I have no idea if those controls can wear out. I think your idea of a speaker selector with impedance matching is a good alternative. Or swapping out controllers...
  7. Robert_J

    Antenna/Composite inputs

    They explain the process on their site. https://www.tvguardian.com/which-tvguardian-is-right-for-you/over-the-air-antenna/ You must have a digital converter box to use it.
  8. Robert_J

    Need help with Impedance settings for Zone 2 with multi-room and in-wall volume knobs

    The Cen Tech from HF is fine for this. If your 8 ohm speaker has a crossover, then there is the possibility that 10 ohms is correct. You are reading DC voltage resistance. Your 8 ohm speakers are AC voltage impedance rated. This is very helpful. It is not surprising that you blew a couple...
  9. Robert_J

    Hometheater set up-subwoofer issue

    With the sub disconnected from the receiver and power, gently press the cone in. You should not hear anything. If the voice coil has unwound, then you will hear metal wires scraping against the metal top plate of the magnet structure.
  10. Robert_J

    Need help with Impedance settings for Zone 2 with multi-room and in-wall volume knobs

    Disconnect the wires from your receiver and measure there. That's where it is important. If it is only you, get some alligator clips for your meter or even tape the wires to the test probes and record the values using your smart phone in video mode. Run around and turn up/turn down the volume...
  11. Robert_J

    Need help with Impedance settings for Zone 2 with multi-room and in-wall volume knobs

    What kind of volume knob are they using? For example, this one has impedance correction - https://www.monoprice.com/product?p_id=8242&gclid=EAIaIQobChMI_4f2t_783gIVBglpCh3QxQuyEAQYASABEgLln_D_BwE Have you measured the resistance without an amp connected? Have someone turn the volume knobs...
  12. Robert_J

    Some help please

    That will get you close since you put it in the loudest location but you don't know how flat the frequency response of your sub is. I had a 14db peak at 55hz which caused my sub to sound extremely weak during movies. If I turned it up for explosions on action movies, music was extremely boomy...
  13. Robert_J

    Small Room Subwoofer Upgrade - Single or Dual?

    Thanks for the amplification information Chris. I'm running the http://projectgallery.parts-express.com/speaker-projects/the-d-iii/ as my left/center/right speaker. My Pioneer receiver could push them until a fast transient sound hit like a gunshot and the receiver's protection circuit would...
  14. Robert_J

    Small Room Subwoofer Upgrade - Single or Dual?

    1. When properly calibrated, there is no such thing as overkill, there is only headroom which keeps distortion lower. I'm upgrading from dual 15's to quad 15's and if there is room, I'm throwing in a 21 as well. 2. What are your goals? I had a pair of SVS 12" Plus drivers and built my own...
  15. Robert_J

    Time to replace my Rythmik FV12

    Have you measured your sub's in-room response to see exactly what frequencies are causing the boom? You may need a DSP to tame some room induced peaks. I built my subs and they were weak when watching movies. No low end at all. When I turned them up for the low end, they were boomy to the...
  16. Robert_J

    SVS SB-2000 or PB-2000

    You would need a real time analyzer to properly set up your phase dial. At your seating position, you will see some dips in the frequency response and you adjust the dial slowly to see if they disappear. But if your receiver has an auto calibration option and your sub has a distance value...
  17. Robert_J

    Adire AVA250 Schematic Diagram

    Why don't you ask Dan if he still has a schematic - https://www.danwiggins.net/ There is a Shiva on Ebay right now. The Eminence Lab 12 should work. Others recommend the Dayton Audio RSS315HF-4. Did you post about this issue on another forum about 6 months ago? Both posts mention 142.5L...
  18. Robert_J

    pioneer sp-c22 vs polk audio cs10

    Your profile here has a Location field. Since the majority of the members are US based, that's what I assume when providing help. I'd go with BIC over any sub you have mentioned. If you have access to woodworking tools, DIY should be an option. You have access to car audio drivers from...
  19. Robert_J

    pioneer sp-c22 vs polk audio cs10

    1. Since your front speakers are Pioneer, get the Pioneer center. You want at least the front 3 to be timbre matched. 2. Since my room was part of the house plans, I went with staggered stud construction and additional insulation on the interior walls to keep the sound it. It was a waste of...
  20. Robert_J

    SVS SB-4000 vs PB-4000 ?

    Go ported. Yes, you will get some in-room transfer down low but your subs will have to work harder for those extremely low frequencies. Ported subs play the low frequencies more efficiently.
  21. Robert_J

    New SVS 4000 Series Subs 'Shake Audio World's Foundation'

    You always want too much. You should be able to turn a sub down so it is not working hard. If you get just enough then you will be running your sub close to its max output which will also give you max distortion. Bloated sound from ported subs are just poor designs. It's too small, tuned too...
  22. Robert_J

    ButtKickers coming to my Home Theater

    I have seriously thought about it but didn't want some fake feeling shaky couch. I've felt something similar on a smart home demo back in the late 90's at Disney World and it felt like a novelty. Some of the guys over at another forum use very large DIY subs behind their seats to get that...
  23. Robert_J

    Subwoofer advise

    There is no such thing as a "digital driver". A sub driver is an electromagnetic transducer. A coil of wire is fed an alternating current which magnetizes the coil based on the phase of the current. That now magnetic coil interacts with the fixed magnet on the back of the frame. Based on the...
  24. Robert_J

    Subwoofer question: Loud POP!

    Did it sound like this? It it was just a tap when the voice coil hit the back plate, then you are OK. If it slammed into the back plate of the magnet then it will deform the coil. It's like stepping on an aluminum can just a little bit. The sides will buckle some. Same thing can happen to...
  25. Robert_J

    New SVS 4000 Series Subs 'Shake Audio World's Foundation'

    Compare the specs - http://images.klipsch.com/R-112SW_-_Spec_Sheet_635467157732240000.pdf Right off the bat, I notice that you can adjust the tuning of the PB-4000 for low tuning 13 hz to 200 hz + or - 3db. The Kipsch can do 24 hz to 200 hz and they do not provide a standard deviation so it...
  26. Robert_J

    Looking for a new sub

    Here's an example of the finish. The color is exactly this. In searching for Rustoleum hammered silver, I found a video where someone rattle canned their old Suzuki Samurai with this. It looks great. I've also painted the top and bottoms of a SVS cylinder clone that I built with Rustoleum...
  27. Robert_J

    Looking for a new sub

    You are welcome. I enjoy this hobby and teaching someone to DIY a speaker or sub is fun for me. That's a slightly newer version of the Pioneer I use. The "phase control" is the distance setting when you run MCACC. Pro amps have a knob or two on the front that is referred to as the "gain...
  28. Robert_J

    Looking for a new sub

    I've been in this hobby since the 1980's but really got serious when the DIY section here was very active with Dan Wiggins, Ben Milne and Scott Atwell (all associated with driver manufacturers). SVS Subwoofers even sprung out of that now defunct section of the forum with Tom helping Ron build...
  29. Robert_J

    MJ-18 - Box / Amp specs?

    You need 3 ports or go with the Mini-Marty design on that other forum you are on.
  30. Robert_J

    MJ-18 - Box / Amp specs?

    It's good that you modeled with 600 watts because that's about what the amp puts out. It's well known that the Behringer amps do about 60% to 80% of their stated power. One 4" port will chuff like crazy. You need at minimum three 4" flared ports. 4" ports have 12.5 square inches of area...
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