Cabinet question.

I have a 4x10 cabinet and 2-1x15 cabinets.
I have used the 4x10 and one of the 1x15's and I have used both 1x15's
together.
They are all rated at 8 ohms.
These days I either play through SS amps or a PA.
Most amps are rated at 8/4 ohms.
So using any two of the cabs prodeces 4 ohms.
No problem.
But I was considering using all 3 of them together which would produce
? watts.
Would it be safe to use all 3 at one time?
Is it just the fact that you want to move more air and have a better 'feel
good factor' with all your cabs behind you?
If so - series the two 15's to make 16Ohms then parrallel the 4X10@8Ohms so
the resulting load seen by the amp output stage is probably quite
acceptable... dunno 'cos my reciprocals and long division are not a lot of
good ! generally valve amps don't like open circuit outputs and tranny
amps don't like short circuit outputs....

Yeah I use a bag end with 2x10 and a horn in one of
those tens. Sometimes atop an 18 but when I go out of
the house I use the two tens all alone. Sounds great
with bass guitar and an Eden WT500 and my $100.00
yamaha precision frankenstein.
1) Does the bass guitar need low frequencies to fit
into the mix with a live band?
2) Do you need low frequencies to hear the bass guitar
in a live band.
3) If the bass is all bloated and muddy what do you
take out of the bass guitar frequeny band wise?
4) What frequency band sounds really lucious when you
are playing bass all alone in your basement.

I don't have anything optimized in my rig . and my 2x10 cabinet sounds
excellent with the 1x15 under it. Pushing 500 watts through it outside. and
was clear as could be. No bi-amp needed. unless your 10s were made for
something other than bass.

has defective hearing. Being a loudspeaker designer I can assure you that
taken on its diameter alone the only concrete statement
regarding the diameter of a driver and its
specifications is " the area of an 18 is greater than
the area of a 15 which is greater than the area of a 12
which is greater than the area of a 10" driver".
As far a frequency response. sensitivity and tone. the
design of the driver and the cabinet as well as the
input signal and amplification will determine those
parameters.
The answer is system design not isolated component
parameter selection. No lying of delusion required.

Hijacking this thread slightly. I want to make a pair of 1x12 bass cabs.
What do recommend for a crossover and tweeter?
Eminence makes a tweeter used in a lot of bass cabs.
Carvin sells ( I think) a kit with the Eminence tweeter
and crossover. I would look to the manufacturer of a
tweeter designed specifically for use with a bass MI
speaker system and go with their recommendation. Maybe
start with parts express for a source.
First thing I would do is measure the 1x12 top end and
determine where it would roll off. The tweeter would
need to go down low enough to be somewhere close to
that. The manufacturer would probably have a chart
something like
Roll off at freq vs Max SPL or power input.
Next I would want to match sensitivity of the tweeter
and twelve's. No sense is putting a tweeter in if it
can not keep up with the bass. Perhaps more than one
tweeter would be required or more twelve's....depends.
Then I would determine if rolling off the top end of
the 12 inch driver would make a better sound than
leaving it go all the way up.