[micb3rd]

Hi Guys, It has been a while since I have been on here.

I recently took my enclosure orginally designed for my car (I mapped transfer function of ther vehicle then desigened this sub system to match) and brought this box in indoors as the response plots showed it would work very well indoors.

It has 2 RE Audio SR 10, which have 18mm linear one way xmax each, I have personally tested these drivers with 1000 WRMS each long term so I know they are up to the job both mechanically and thermally. Each driver is DVC 4 ohm so individual coils are wired in series to 8 ohms and then the pair of drivers wired parallel to a final load of 4 ohms.

The drivers have a low Qts thus do not require big enclosure and sound quite neutral with a nice walmth. The freeair FS is fairly are low at 25hz so they do gain from low tuning.

The box dimentions are 2.6 cubic foot net, vent is tuned to 25hz, with 37.5 Square inches of port area, the vent is very large this was mainly to ensure vent noise is kept to a minimum and it was good and efficent port under high amounts of power.

I have a BK Elec BSBPV500 so 500 WRMS into 4 ohms so the drivers have 250 WRMS each.

How does it sound?

Well I really like the sound, music is clean, films wobble in the right places, my room is small and there is plenty of bass across the range.

From ear there is a shallow small roll off below tuning point, I have yet to hook up a SPL meter or REW etc to check the response. I do know that I played 16hz played loud the old wood door next to my room was moving back and forth and there was a lot of pressure in the room.

I think this will keep my bass fix needs happy for a while.

You can see in the pics I had a small sealed version with single driver, 1.0 cubic foot, Qtc of 0.62 and 500 WRMS, this sounded very good but is far less efficent (at least 6db).

Keeping power the same but doubling cone area, box size and adding a low tuned vent really makes a difference!