Custom SDA's 120dbl and climbing

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  • tonyb
    tonyb Posts: 33,000
    edited January 2007
    hangon wrote:
    Well get a CineNova amp and try it yourself, dont beleive me?
    The Earthquake Company makes them!!
    Use earplugs duh.

    Someone has gotta use this one in Sids Kharma.
    HT SYSTEM-
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  • shack
    shack Posts: 11,154
    edited January 2007
    hangon wrote:
    Well get a CineNova amp and try it yourself, dont beleive me?
    The Earthquake Company makes them!!
    Use earplugs duh.

    Well...now that you've explained it...NO!
    "Just because you’re offended doesn’t mean you’re right." - Ricky Gervais

    "For those who believe, no proof is necessary. For those who don't believe, no proof is possible." - Stuart Chase

    "Consistency requires you to be as ignorant today as you were a year ago." - Bernard Berenson
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  • TroyD
    TroyD Posts: 13,083
    edited January 2007
    Our boy hear may seem about as sharp as a banana but you gotta admit, the entertainment value is there in spades.

    BDT
    I plan for the future. - F1Nut
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  • madmax
    madmax Posts: 12,434
    edited January 2007
    With my old carver pro amps pumping out 1650 watts each I don't remember hearing anything close to 130 db when the top lights were hitting hard. Maybe I had defective grid power in my area. ?? Oh the good ole days of high power.
    madmax
    Vinyl, the final frontier...

    Avantgarde horns, 300b tubes, thats the kinda crap I want... :D
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  • ben62670
    ben62670 Posts: 15,969
    edited February 2007
    Well I have been working on my project today. All the woofers were 8ohms, and the TL's have 4ohms dimensional drivers. The inductor is about 3 ohms by itself, and the SDA effect just wasn't there. I replace the 8ohm dim drivers with 4ohms today. The sound stage opened up greatly. The singers are sounding very well centered, and the speakers all but disappear (all six feet of them). The depth just isn't there as much as my SDA'2 on the same gear. Still studying up on the tri amp project. The only caps or inductors in there are just the one large inductor for routing low frequencies to the dim drivers.

    Well back at it. More research time.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • jdhdiggs
    jdhdiggs Posts: 4,305
    edited February 2007
    F1nut wrote:
    It's a real stretch (next to impossible) to hit 120dB and flat out impossible to hit 130dB with your amp and your speakers. So, no WE don't believe you!

    Maybe if he was locked in Sid's closet with just the speakers and the amp.... Maybe, just maybe then he might get close...
    There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin
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  • Deadof_knight
    Deadof_knight Posts: 980
    edited February 2007
    OK he could have hit it with the meter he was using I have seen many meters that werent calibrated correctly....So it says 120 at 1 meter. Ive hit 131 in my car (86 rx7) with the age old fosgate punch 150 in mono on a pair of 12's It won me 1st place in the car audio contest and walked away with 150 dollars and a nice size trophy. It might be a stretch but after all he is doing something we havent tried in attempt to have the speakers he desires.....

    ITS ALL ABOUT SUFACE AREA AND POWER ISNT IT AS FAR AS DB LEVELS GO!
    :cool: " He who dies with the most equipment wins Right ? "

    Denon 3300 Adcom 535 BBe w/sub out 1 pr 4.6s 2 pr of 4 jrs Recent additions Samsung Lns-4095D LCD, Samsung hd-960 DVD, Monster HT-5000 Power center    ,HPSA-1000 18" sealed DiY home sub.:D
    Black Laquer 1.2tl's w/ upgraded x-overs and Tweets BI-Amped with 2 Carver tfm-35's Knukonceptz 10ga cables
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  • F1nut
    F1nut Posts: 50,731
    edited February 2007
    Not quite.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • ben62670
    ben62670 Posts: 15,969
    edited February 2007
    Ok guys this is turning into pick on dumb kid thread.

    I could use a little help here with my project please. so I will repost proir to where the silliness began.

    These are cabinets that are just "prototypes" that have been modified for different configurations. The bracing in these is decent, but not how I am going to do the finished product. I will post pics of the insides of the finished product. The 2 10's are about 15% undersized from the big boy SDA's. The 1.2's and the 2.3's both have 15 inch PRs. The 1.2's have 8 MW's in them, and the 2.3's have 6 MWs in them. I am going to reface these one more time to try 3 10's. The PR's are over extending at full throttle @ 50hz and below. The next prototype may have 8 drivers for the stereo, and 4 for the SDA effect. If I do decide to go with 12 MW's in each cabinet I may use 4 10's in them. I haven't decided whether or not to have a separate chamber for the dimensional drivers to increase overall efficiency, and accuracy. I will be running a GFA-585 for the stereo, GFA 7500 for the dimensional, and GFA-7500 for the tweeters all electronically crossed over. On the stereo and dimensional drivers I want to place a fader on the outputs to the amps so I can adjust the SDA effect. I am going to experiment with the phase, and stereo separation of the dimensional drivers. It is so nice to be able to independently control the levels, and crossover slopes of all the drivers.

    Thanks again, Plugging away,
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • ben62670
    ben62670 Posts: 15,969
    edited February 2007
    OK guys I need a little advice. I am going tri amp my speakers. There are going to be 8 6503's in the stereo array, and 4 in the dimensional array (both arrays running at 4 ohms). Can I run the dimensional array out of phase, and send the left signal to the right, and the right to the left to get the SDA effect? I am assuming that is how they did the SRS system with the controller.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • PolkWannabie
    PolkWannabie Posts: 2,763
    edited February 2007
    Not SRS ... SRT ...
    Rick
    HT+ Sunfire TG IV, Dual CG Sig II's, CinePro 1K2, Oppo 981, Audio Technica PL120, Polk SRT's & F/X1000's, Samsung 71" DLP
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  • ben62670
    ben62670 Posts: 15,969
    edited February 2007
    PolkWannabie wrote:
    Not SRS ... SRT ...
    Thanks I get confused at 2:30 in the morning :o
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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