kfx450r

Alpine MRP-450 minor scratches, just like 1 or 2 on the sides. Works great. 70$ Shipped. Need to sell, have expenses due. Sorry for crappy phone pics, all ive got. Has 2x 20 Fuses, will do 450rms on good 14.4 electrical. @ 2 ohm and 250 rms @ 4 ohm.

They'll match it, you just have to let them know you want them to match it and u prob need to bring a printout of the cost online (despite the fact its obvious they know the price online)...The workers there dont give a shit about the corporation, they just dont want a hassle with a customer so they'll get it done. I did the same thing with best buy one time, I had to ask them if they price matched, they said yes and i brought a printout and they matched it. Usually if its "in stock" at your store online then u can just order it there and pick it up 5 mins later.

Well a btl 12 has a FS of 39hz and i dont know any one tuning their btls to 40+ hz unless for competition which i could care less about.

37hz i think

No idea what you mean..How would the tuning be 33 hz if i cut the port length in half

Hm well how do u calculate that. Precision port calculator claims a 4" flared port needs like 36" of length to get the tuning down to 33 hz. I know people tune 8s low, theres no way im tuning this thing above 40 hz...I do zero competitions and could care less whether it did good on the meter or not.

yah its rated for 400 but its called a 450 so i figured id get atleast 450 ah well..Thats fine, thanks Gonna run it at 2 ohms, which im pretty sure there rated at 2 ohms.

Yah I dont doubt that they are solid amps that do rated, just curious as to if they did a little more or not. I guess only way is to get it benched.

Do these amps do more than rated? Im pretty sure there rated at 14.4 but if you had the electrical to hold that with no drops could you see more? Picked up a MRP-M450 wondering if I can expect to squeeze 500 out of it. There only rated for 400 tho despite the 450 name id guess they can do 450 rms

Anyone? As you can see put the port in middle, now only has 2 turns ill 45 them and angled sub lower away from the port.

K hows this?

Thanks for tips..Also cant go back wall because its a 34" long port..starting at bottom and going up back wall is too short by about 3 inches. Unless i went from the bottom , came along back wall and then along top of the box 3 inches or so..2 turns..and positioned the sub in the middle of the box?

Think this is def the box ill end up building, will prob get wood in the next few days, just seeing if anyone sees anything wrong with this. Will be mounted in ext cab truck just like you see it. Details on picture. Port area is 12" which i think is just about right for a 0.8 cube box.

I have a 8" waiting to put into truck, just needa build a box for it, will put it in build log..it'll be a True Bass Ultra 8" on a alpine mrp-m450 in about .8 cubes tuned to 33 hz

SOLD! Will get it out in the morning.