Mid Bass as Rear Fill and mono mid bass?

[OmegaRed]

I'm upgrading the audio in the new truck (08 Ridgeline) with most of the components from my old car.

I'm looking at eventually bi-amping the front component set (I've an older set of 6.5 dx comps, but will likely upgrade for 6.5 MM's). Because I have extra drivers from the old car i thought about putting a woofer from the old comps in the rear doors and xovering it to be just mid-bass (say 60-300hz or something like that).

What are the opinions on mid-bass as rear fill?

The second part is that I am eyeing up a RF 3sixty.2, for xover and eq and delay duties. The only downer is that to bi-amp the comps I have to use the front and rear channels as the front low and front hi, leaving only a center channel output to use for the rear. The center channel output is mono.

Is mono mid bass a bad idea?

Is it more of a bad idea using it for rear fill?

I ran my last car without rear speakers at all and I seemed happy, so I'm not sure if this is a case of just wanting to use the rear speakers.

Thanks
bob

[MacLeod]

The whole point of midbass speakers is to get as much bass up front as possible and to keep the sub from pulling the stage to the rear. Putting midbass speakers in the rear defeats this purpose as your subwoofer is much better at playing those frequencies.

[only126db]

I could have swore a midbass was exactly for that----middle bass octaves---- which a subwoofer does not produce....

[MacLeod]

A sub can play well passed 200 Hz but anything much over 63 Hz and the bass starts to pull to the rear. Since you dont want this, you stick in midbass speakers that can play 40-100 Hz with a lot of authority and that leaves the 40 and below frequencies, which are extremely hard to localize in a car, just for the sub.

Also, another reason for dedicated midbass speakers is when youre using small midrange drivers like 3-5". Youll use smaller drivers to mount them in tight spots like the dash or kick panels and since the smaller the speaker, the less it can reach down into the midbass range so you use dedicated midbass speaker to take up this slack.

Now if youre using a quality set of 6.5's up front you dont need midbass speakers cause a good 6.5 can play down to 50 Hz with ease and plenty of authority.