micb

You must try sealing that off so bass only flows into the cabin, it will be louder as you will be getting cancellation from the bass going into the trunk currently. I gains 6db at 40hz when I sealed up, the null I was getting was that bad!

Cool. It must be so nice to have good bass back. Since I stripped my Fi tunnel install down I have been missing bass big time. So loud do you think the Tahoe it is now Steve?

When you place a woofer directly on a baffle the air displaced by the cone and outer surround radiates all directions it can, air likes the most direct route so interuptions are bad, if you put a woofer straight onto a baffle the air flows over the basket/bounting ring and onto the baffle. If you recess the woofer into the enclosure or add an additional panel ontop so the outer surround is flush with the baffle you improve air flow from the woofer to the baffle, SPL cars use this to gain a few 10ths of a db. If you look at your current mounting will have air pressure moving down into the void between your woofers, if you filled that void then the pressure can only move upward in unison into the rest of the vehicle cabin. It is not much extra output but every little counts. It is not worth changing now it is all trimmed and only a small gain but something to consider in the future.

Nice one Steve, the two tone wrap looks good. May I ask why you did not add an addtional trim top to the enclosure as now your woofers are sitting prowd from the enclosure it is not optimal airflow from woofer surround to the baffle?

Good work guys this looks to be once heavy basser.

Good stuff Steve! Shame the breaker could not take the parallel hockup. Let me know if you do that as i'd like to see that in person.

Great find Steve. I have had alts explaned to me before but now I understand exactly how each part works. Good vid.

Intersting vid not seen many gas cooled systems. UK monster last season did 177.1 so a fair bit to go for the nitro cooled one to catch up!

Yep it is a Focus. The system is 4 x JBL GT5 10's of 1200 WRMS in a 33hz tuned box. SPL testing with/door window open (louder on the lows). Peak=142.7dB @ 37Hz 40Hz=141.8dB 33Hz=142.5dB 25Hz=138.3dB 20Hz=138.7dB So it plays quite flat! Blocking the port to tune to 20hz makes it do 140db at 20hz. http://s31.photobucket.com/albums/c358/Meg...nt=382f9a81.pbr Loads of th UK guys have yellow ducks about so there may be more vids!

A fellow bass head friend of mine made this Video. I think you (esspecially Assman) will like it! http://s31.photobucket.com/albums/c358/Meg...nt=ed363ddc.pbr

Nice, did you try with passenger window closed so all the pressure is forced out the drivers window? Also try a few test tones at 25-33hz. With your low tuning it should move a lot of air in this area.

Nice! Got to love those old JL's. What did you have powering them?

That looks great! I love the motorisation. Did the front chamber act as a bandpass or was it just built that way? I bet it sounded great.

It is either: 1) A tensel lead is slapping against something (spider or cone ect) which very common. 2) Dustcap is vibrating againt the cone 3) Cone has come away from spider. 4) Coil is misalligned or damaged and scraping. Touch the dust cap does it stop? You need to take the driver out and play it free air, watch the tinsel leads if they are not making the noise then it is likely a problem with the coil i.e recone/replacement time!

Nice vibration!