Altec Lansing 418 B


I just bought a acoustic 201 Bass/Guitar cab with 2 15" 418 B Altecs.It also has a 14" Horn over the speakers.
My question is ,would it improve the sound if I drilled ,like 4 3" breatherholes in the front?
All the newer Bass cabs have those.
I also would like some general info on that speaker.Whats the RMS?
Whats the frequency range and what was it used for ?Was it primarily Bass or guitar?
Thank's alot for any info G.Lamberts


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