redbaron80 Posted April 3, 2012 Report Share Posted April 3, 2012 now, when will we see 165 @ 20 hertz? Official Scores at the Dash. and YES. My Bass Boxing is louder than Burp! - 155.5 DB Drag Burp- 155.6 - IASCA Bass Boxing on music (30 seconds straight) sealed up Builds 1. The Acura Integra build = http://www.stevemead...s/page__st__6802. BLK SIN Build = http://www.stevemead...w-pics-10-6-07/ Link to comment Share on other sites More sharing options...
jdw46 Posted April 3, 2012 Report Share Posted April 3, 2012 Lots of time money recones and lots of testing 2000 stratus10 SunDown E-10s Singer 250amp Alt Xs Power D975Concept c2400All 0 gauge wire10 6 1/2's in Rear Doors Link to comment Share on other sites More sharing options...
myn Posted April 6, 2012 Report Share Posted April 6, 2012 My home theater subwoofer, a folded horn (Tuba HT) with 10.8 volts or 29 watts of power can do a calibrated 130+ DB's in a 10,000 sq foot room @20hz. 110db 1 watt/1 meter sensitivity. You do the math with 500 watts Below 20hz down to low teens (13hz) it will do 125dbs all day long, again in a room that is 10,000 sq feet. Put it into a van/truck, and who knows what it does. I gotta think cabin gain would boost it up 10 - 15dbs Keep in mind the Radio Shack Digital SPL meter reading at frequencies below 25hz are -8db below actual calibrated mics. To compare, the 14 cu foot enclosure to the left of it in the video which is a traditional EBS/LLT ported alignment tuned to 14hz with a Mach5Audio 18" IXLi 1/4 as loud. Horns are a force to be recon with. They'll eat up sealed/ported for lunch all day long at the expense of size. Distortion measurement: Music: Movie: Inside: Link to comment Share on other sites More sharing options...
n8ball2013 Posted April 6, 2012 Report Share Posted April 6, 2012 take that rat shack meter and throw it out hte window. THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
myn Posted April 6, 2012 Report Share Posted April 6, 2012 take that rat shack meter and throw it out hte window. Why? Given the correction tables, it's been proven 100x over to be quite accurate. Unless you know of another solution costing < $50? Maybe we should all just fork out $650 for a TermLab? http://forum.audiogo...86&openflup&1 http://www.danmarx.o...on/rsmeter.html http://www.gti.net/w...55/33-2055.html http://www.etfacoust...AnalogueSPL.zip http://www.audioc.co...stcd/testcd.htm http://www.hometheat...ion-values.html http://www.audioxpre...ia/koya2811.pdf http://www.svsound.c...faqs-rscomp.cfm Link to comment Share on other sites More sharing options...
Robby Holmes Posted April 6, 2012 Report Share Posted April 6, 2012 this thread was previously discussed, iirc it would cost around $100,000. so.... good luck. '08 Chevy Cobalt coupe 2.2 base model trunk build: 2 9512iSC flatwound alum 1.5 coils -extra 9500 spider pack -8" platinum carbon dustcaps 1 DD Z1 (.375ohm nominally daily) 3g31 AGM 320a Ohio Gen alt 1 DD S4 4 channel 4 VO-M8v1's (holes cut for 3rd pair) 2 CS 6.5's 2 VO-B1's Sony XAV-601BT all Knu Krystal RCA's Cadence 7band EQ ______________________ 148.3db @ 32hz (burp) 148.4 @ 37 & 38hz (burp) 146.xdb 90sec average (center windshield) Link to comment Share on other sites More sharing options...
nw1234567 Posted April 6, 2012 Report Share Posted April 6, 2012 lots of time spent in box design youd have to build a box that most likely would peak in that area. so tuning your box really stupid low. like probly 15 hz. have ALOT of Port. and alot of power..with more power and probably some more. oh did i mention power. and after all that you wouldnt be able to hear it. because humans cant hear below 20 sumthing hz oh and dont forget the 10s of thousands of dollars youll probly spend Low end of the human hearing range is supposed to be ~20Hz but some people can't hear that low some can hear lower Link to comment Share on other sites More sharing options...
HHR Ed Posted April 6, 2012 Report Share Posted April 6, 2012 I would start with 4 400a alts, 15-20 D3100s and about 6 9k amps. Then I would look into maybe 12 18s. Oh yeah and someone crazy and smart enough to build it. Here are just some guesstimates on prices: Alts- $2500 Batteries- $7000 $10500 Amps- $12000 Subs- $7500 Misc supplies and Materials- $6000 Labor- $25000+ Total- $63500+ I think that should about do it. EDIT: Thought about it and 20 D3100s just wouldnt cut it for 54000w. I think 30 should do the trick. You may need more batts actually. And more money. Thing is, youd have to choose a suitable vehicle, and you cant just pick a random number of woofers like 12 18s. You have to design around the vehicle being used. The cabin airspace is basically like a chamber of the enclosure, and cone area and displacement would have to be matched to that. So there is a chance 8 18s would get louder or perhaps 16 15s depending on the vehicle. Then there is the question as to whether or not the vehicle would hold up to the sympathetic vibration. The best thing to do would be to build a large extreme vehicle tuned to that range. So you are looking at even more money in the build and money to support hauling and storing it. I'd estimate around $150,000 But ya know, there was a vehicle that once did a 170 at 7hz. It was Richard Clark's bread truck with the custom 60" woofer he built run off an electric motor system. I believe he had well over $100,000 in it and he only played it 3 or 4 times before it was trashed. Ed Lester ShowtimeSPL Host Showtime Electronics Video MarketingMy old Build Loghttp://www.stevemead...08/#entry511451http://www.youtube.com/showtimespl 5 time dB Drag Finalist Last ride 2007 HHR, current dB 153.5 and bass race 149.4 dB. 153.0 dB on music New Ride, 2008 HHR SS. Build under way. Loudest score ever = 171dB 2009 dB Drag Racing, North American Points Champion Link to comment Share on other sites More sharing options...
HHR Ed Posted April 6, 2012 Report Share Posted April 6, 2012 My home theater subwoofer, a folded horn (Tuba HT) with 10.8 volts or 29 watts of power can do a calibrated 130+ DB's in a 10,000 sq foot room @20hz. 110db 1 watt/1 meter sensitivity. You do the math with 500 watts Below 20hz down to low teens (13hz) it will do 125dbs all day long, again in a room that is 10,000 sq feet. Put it into a van/truck, and who knows what it does. I gotta think cabin gain would boost it up 10 - 15dbs Keep in mind the Radio Shack Digital SPL meter reading at frequencies below 25hz are -8db below actual calibrated mics. To compare, the 14 cu foot enclosure to the left of it in the video which is a traditional EBS/LLT ported alignment tuned to 14hz with a Mach5Audio 18" IXLi 1/4 as loud. Horns are a force to be recon with. They'll eat up sealed/ported for lunch all day long at the expense of size. Distortion measurement: Music: Movie: Inside: Are you trying to estimate SPL based off of the sensitivity rating and a weighted measurement from a non accurate mic type meter that is easily thrown off calibration? If so, throw all those numbers out the window. Ed Lester ShowtimeSPL Host Showtime Electronics Video MarketingMy old Build Loghttp://www.stevemead...08/#entry511451http://www.youtube.com/showtimespl 5 time dB Drag Finalist Last ride 2007 HHR, current dB 153.5 and bass race 149.4 dB. 153.0 dB on music New Ride, 2008 HHR SS. Build under way. Loudest score ever = 171dB 2009 dB Drag Racing, North American Points Champion Link to comment Share on other sites More sharing options...
myn Posted April 6, 2012 Report Share Posted April 6, 2012 Are you trying to estimate SPL based off of the sensitivity rating and a weighted measurement from a non accurate mic type meter that is easily thrown off calibration? If so, throw all those numbers out the window. Nope. The designer, Bill Fitzmaurice speced the 110DB sensitivity for this folded horn. Which is directly inline with other folded/tapped horn designs out there. Have you guys seen Tom Danley's TH-221 and TH-812 Tapped Horns? All of these measurements are measured in half-space. Outside basically on single plain (ground) If they are capable of doing 150's outside, imagine what they can do in an enclosed cabin with transfer function. http://www.danleysou...pec%20sheet.pdf http://www.danleysou...pec%20sheet.pdf Link to comment Share on other sites More sharing options...
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