SnowDrifter Posted June 3, 2011 Report Share Posted June 3, 2011 My friend has a spare 7 inch midbass driver laying around. I just figured out how to build a t-line box and his brother wants a bit of bass in his Volvo 740 So of course, now I want to build a t line box. But I don't know the resonating frequency of the speaker. Is there any way i can figure this out so I can build the box? What would I do? Free air it and try to see at what frequency it moves the most? P.S. Looking up the specs isn't an option. It is the midbass driver from a dcm loudspeaker from the (90s?) ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
RooTxBeeR Posted June 3, 2011 Report Share Posted June 3, 2011 I was going to say best bet is looking it up, but as you stated that's a no go. If there is a way to find it through some test or calculation I am sure someone will post it eventually. On 11/20/2012 at 8:54 PM, AMI CUSTOMS said: Turned mine up today at a light, guy next to me his steering wheel started moving and he looked over at me like I was a magician lol. On 5/9/2012 at 8:45 PM, skittlesRgood said: fuck the plating. look at what the main metal used is. you could buy unicorn blood plated terminals but if its just covering up dog shit, whats the point On 4/10/2013 at 12:26 PM, mrd6 said: I'll admit, half way through sanding that fiberglass in the rain and cold while I was all itchy I was definitely starting to question why i was doing this haha Soon To Be '04 Ford Escape US Alternator 280A Hairpin D4800 Under the Hood (6) XP3000's in Rear 1/0 SHCA & XS Power 4 runs to back TORK2 kit from Tony @ CE Auto Supply Pioneer DEH-80PRS DD AW6.5 (2) per door *Tweeter Unkown* DD SS4a & C3d (2) SCV4000 @ .5Ohm (2) 15" Sundown Zv5 Link to comment Share on other sites More sharing options...
Forevrbumpn Posted June 3, 2011 Report Share Posted June 3, 2011 easiest way, if its a DVC hook up power to one coil, other coil get a volt meter set at ohms do test tones from 20hz - 80hz Get grid paper, do a graph row going up- ohms 1ohm to say 60ohms width on the graph, tone graph it out, you will see a big peak in the impedance, that is where Fs is If you can do increments in 5hz that would be easy, other than that, 1hz per test will suck lol I have a ritual called "terminator". I crouch in the shower in the "naked terminator" pose. With eyes closed I crouch for a minute and visualize either Arnie or the guy from the 2nd movie. I then start to hum the T2 theme. Slowly I rise to a standing position and open my eyes. It helps me get through my day. The only problem is if the shower curtain sticks to my terminator leg. It sorta ruins the fantasy. Link to comment Share on other sites More sharing options...
SnowDrifter Posted June 3, 2011 Author Report Share Posted June 3, 2011 easiest way, if its a DVC hook up power to one coil, other coil get a volt meter set at ohms do test tones from 20hz - 80hz Get grid paper, do a graph row going up- ohms 1ohm to say 60ohms width on the graph, tone graph it out, you will see a big peak in the impedance, that is where Fs is If you can do increments in 5hz that would be easy, other than that, 1hz per test will suck lol How 'bout if it is a SVC @5 (yes, 5) ohms? ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
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