Polk RT3 mod

[ChestofFur]

Hi Folks,

My cousin is looking for some speakers he can rock out to but he is on a tight budget. His dad has a pair of damaged Polk RT3s that we thought we could salvage. Here are the specs:

Driver Complement

Mid/Woofer 1 - 5-1/4" Diameter (13.34cm)

Tweeter 1 - 1" Diameter (2.54cm)


Dimensions

Cabinet Size 12-1/2" H x 7-1/4" W x 8-1/2" D
(31.75cm H x 18.41cm W x 21.59cm D)
Enclosure Type Vented, dual port

Here's a picture RT3 Specs Page : High performance bookshelf speakers : Polk Audio

And a video Polk RT3 and RT12 test - YouTube

and a mod that Dr. Mark has done Dr. Mark Says Blog Archive Polk RT3 speaker mod.

Dr. Mark's mod is beyond our budget so I was hoping if I could get some suggestions from the forum here. Is it worth trying to put together drivers and a crossover to work in this cabinet? Is there any kind person out there willing to model something for us?

[ChestofFur]

This dayton driver looks like it would fit the woofer cut out

Dayton ND140-8 5-1/4" Aluminum Cone Midbass Driver 8 Ohm 290-218

[Inductor]

Do you mean the drivers are too expensive?
You need to have a few (selected compatible drivers) to be able to make a choice. After that you may need to change the xover or a kit/design with those same drivers. Is that (2 drivers) all that you need?

[ChestofFur]

Yes, the drivers he used, especially the mid, are pretty expensive.

The speaker is a two way so a mid and tweeter are what we need.
I looked at some kits I haven't found anything to match the volume
of the polk cabinet.

[ChestofFur]

This kit looks like it would work but the woofer is a big for the polk cut-out

Aurasound NS6 Speaker Kit - 4 ohm Woofer - Parts Only: Madisound Speaker Store