Posted March 14, 200817 yr I am in need of a box design. I have a 99 grand am and Im going to build a ported box for one of my atlas15
March 14, 200817 yr Author ok but would that box design work well? its very simple with just a 5in port, or should i go slot ported?
March 14, 200817 yr just my opnion but 3.8 with a PVC port will produce a lot of port noise...build it 4.25gross4.0cf net use Areoports...post the T/s ill plot it up for you with Bbp6...can you go a lil wider than 35" ???
March 14, 200817 yr Author ya i know with one 5inch port i have little port area, i was also thinking of going with 2 4inch ports which would bump up port area to around 26. i could go max 37 wide but it would be very tight and the box would be moved forward about 1 inch so i would only be able to go 19 deep. also the atlas you can adjust the qts so whcih ts specs do you want low qts or high qts?
March 14, 200817 yr ya i know with one 5inch port i have little port area, i was also thinking of going with 2 4inch ports which would bump up port area to around 26. i could go max 37 wide but it would be very tight and the box would be moved forward about 1 inch so i would only be able to go 19 deep. also the atlas you can adjust the qts so whcih ts specs do you want low qts or high qts?adjust ???what do you lisen to ?Low if you like MusicHigh if your going to hitt the SPL lanes.
March 14, 200817 yr Author "These are the T/S specs for the Atlas 15 in its high Qts setting. This alignment is typically only recommended for infinite baffle and dipole use. However, it can also be used to great effect in sealed car audio enclosures to achieve more output down low by creating a powerful bump in the frequency response. This setting typically requires the least power to reach excursion limits, especially in an infinite baffle setup. The lack of an enclosure in an "IB" setup allows the high Qts to give a much more natural frequency response and fantastic sound quality. This setting is generally not recommended for ported enclosures. Below is the wiring diagram for the Atlas 15 in the high Qts setting. Simply leave the gold terminals open and untouched. The connection to the amplifier should be made by using the silver terminals on the subwoofer. Please visit the DIY & Tech Info page to see some recommended enclosures for the Atlas 15 in this setting." Fs 21.5 Hz Qms 6.56 Qes .624 Qts .57 Vas 364 L Re 2.8 ohms Znom 4 ohms Xmax 18 mm Sd 810 cm2 Mms 139 g Vd 2.91 L RMS Power 300 watts BL 8.5 Spl 1W/1M 89.5 dB Spl 2.83V/1M 93.5 dB Le .86 mH Cms .388 mm/N No. .567 Cutout 14.125" Diameter 15.5" Depth 7.25" Weight 24 pounds"These are the T/S specs for the Atlas 15 in its mid Qts setting. This alignment is only recommended if you have a larger enclosure size available. It has lower overall sensitivity than the low Qts and requires larger enclosures. This setting can work very well for home and car audio setups, but home audio ported enclosures tend to get a bit too large. Sealed enclosures work very well, but also need to be bigger. Although the sensitivity is lower overall, the low frequency sensitivity is increased. Because of this, less power is generally needed versus the low Qts setting. Below is the wiring diagram for the Atlas 15 in the mid Qts setting. Simply place a 1.5 ohm resistor across the gold terminals. The connection to the amplifier should be made by using the silver terminals on the subwoofer. Please visit the DIY & Tech Info page to see some recommended enclosures for the Atlas 15 in this setting." Fs 21.5 Hz Qms 6.56 Qes .483 Qts .45 Vas 364 L Re 2.8 ohms Znom 4 ohms Xmax 18 mm Sd 810 cm2 Mms 139 g Vd 2.91 L RMS Power 300 watts BL 10.3 Spl 1W/1M 90.6 dB Spl 2.83V/1M 94.5 dB Le .86 mH Cms .388 mm/N No. .711 Cutout 14.125" Diameter 15.5" Depth 7.25" Weight 24 poundsThese are the T/S specs for the Atlas 15 in its low Qts setting. For the majority of alignments and uses, this will be the Qts selection of choice. It has the highest overall sensitivity and requires the smallest enclosure. This setting works very well for home and car audio setups. It gives you the smallest sealed enclosures. It also gives you very potent ported enclosures. Unless you have lower power requirements or room for a much larger enclosure, this should be the optimal Qts choice for the Atlas 15. Below is the wiring diagram for the Atlas 15 in the low Qts setting. Simply place a wire jumper across the gold terminals. The connection to the amplifier should be made by using the silver terminals on the subwoofer. Please visit the DIY & Tech Info page to see some recommended enclosures for the Atlas 15 in this setting." Fs --- 21.5 Hz Qms ----6.56 Qes ----.392 Qts---- .37 Vas---- 364 L Re------ 2.8 ohms Znom----4 ohms Xmax ----18 mm Sd------ 810 cm2 Mms --- 139 g Vd ----- 2.91 L RMS----300 watts BL----- 11.7 Spl--- 91.5 dB Spl 2.83V/1M ----95.5 dB Le--- .86 mH Cms ---.388 mm/N No.----.904 No clue what "No" is. Cutout--- 14.125" Diameter---15.5" Depth ---7.25" Weight---24 pounds i listen to rock/rap/alternative not looking for a number box no competing gonna be done here just something that will play low and shake everything in the car and maybe the car next to me. also i can adjsut the qts of the atlas with the second vc, which is smaller than the other. hard to explain but yes you ca adjsut the qts. Edited March 14, 200817 yr by dustin
March 15, 200817 yr umm i think its .1cf not to sure though.Box Parts (Square Prism) 3/4in MDF1 Top, 1 Bottom: 16.75 x 36.5in1 Front, 1 Back: 11.5 x 35in2 Sides: 11.5 x 16.75ports 2x 4" round x 27 7/8"25.5Hz Name: Type: Standard one-way driver No. of Drivers = 1 Fs = 21.5 Hz Qms = 6.56 Vas = 364 liters Cms = 0.388 mm/N Mms = 139 g Xmax = 18 mm Sd = 810 sq.cm Qes = 0.392 Re = 2.8 ohms Z = 4 ohms BL = 11.7 Tm Pe = 300 watts Qts = 0.37 1-W SPL = 91.5 dB 2.83-V SPL = 95.5 dB-----------------------------------------Box Properties Name: Type: Vented Box Shape: Prism, square Vb = 3.371 cu.ft Fb = 25.5 Hz F3 = 37.53 Hz Fill = none No. of Vents = 2 Vent shape = round Vent ends = two flush Dv = 4 in Lv = 27.89 in
March 15, 200817 yr Author thnaks for the help, couple questions though one why 25hz? that seems really low for car audio. also the ports will be 28inchs that means i have to put them width so they would be firing into the side of the trunk how will that wrok out?
March 16, 200817 yr thnaks for the help, couple questions though one why 25hz? that seems really low for car audio. also the ports will be 28inchs that means i have to put them width so they would be firing into the side of the trunk how will that wrok out?you said you wanted Music...if you like i can tune it higher but that is the best response i plotted was @ 25Hz...with the given T/s
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.