I will be building a new box for my Cerwin-Vega HED-802 8" sub, and I still can,t decide wether to build a ported or a sealed one. Again, I'm shooting for SQ only. My two goals are amazing transient response and a flat response curve. What would be best, keeping in mind that I am feeding it with 150W RMS, which is what it is rated to.
Cheers,
G
i say build a sealed box.
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Any size recommendations, Wisywig? With www.carstereo.com sub box calculator, a box with a QTC of 0.8 would be 1.5ft3. Will I loose a lot in '"punch" and transient response by building a bigger box?
Cheers,
G
1.5 cubes sealed is gonna drown that little 8.
what's cerwin vega recommend?
--------------------------------------------------------------
Offical dealer for the following-
SOUNDSTREAM
DB LINK
DB DRIVE
PANASONIC
GARMIN
ROSEN
SCOSCHE
XE DESIGNS
SOUNDGATE
PAC
LITEGLOW
They recommend 0.50ft3, but the Q-logic box it is in is 0.6cu. ft and doesn't give a good transient response.
Alright, I just built the 0.35cu ft box they recommended when filled with polyfill. I still haven't tried it yet as the polyurethane sealant needs to dry and the terminal cups isn't installed on yet.
It weighs like twice as much as the Q-Logic box, even though it is half the size, so I guess it should be way better. It still seems infinitely small, but, anyways.... Can't wait to see how it sounds. Cerwin Vega shows a graph in the manual for the Qtc response of the enclosure, and it seems extremely linear, being -30db @ 10HZ all the way to 0db @ 60hz, without any peaks.
I'll post the results tonight, when I'll have it work.
Cheers,
G
those Q-Logic boxes, and any other prefab box for that matter, are usually made out of some cheap ply wood, so if you used 3/4 inch MDF like you should have then your box should weigh a lot more than the prefab. And it will definately sound better not being in some flimsy box, cant wait to here results
Hi all,
Alright, I finished building the 0.35ft^3( geez it's small!) sealed box, and I can only say that it is exactly what I wanted from a sub. The SQ really is impressive, no more "lag" in the sound, transient response is excellent, and plays low enough for me, surprisingly - I would've expected a box that small to be rather limited on the low end! Because of my amp I can only wire it in 8ohm though, so with only 100wRMS going at it, it does lack a bit of juice for the big bass tunes. I'll just slap an infinity mono amp on the sub and my current amp ( Lightning Audio Bolt B2.150.2 2chan. ) on my components that are supposed to be here this week, JL VR600-CS ( not the newer gen CSi, but I don,t think there's any diff. in sound right? Got an amazing deal on them so I couldn't pass it up ).
For now, the sub doesn't blend very well with the rest of the system, as the Pioneers aren't that good at playing midbass. I really hope the JL will be better.
Sndsgood: Currently the x-over is at 80hz. With my HPF lower than that the speakers distorts way too early. I hope to be able to set it up at 50hz with the JL.
Cheers,
G
sndsgood: Thanks a lot for the advice. If you ever have a minute, I'd really appreciate if you could contact me via IM @ bguillaume@hotmail.com , I'm online very often, I'd extremely like to hear about your advice before I get into the installation and setup process
Cheers!
Guillaume
