Re: 10 & 12 in one speaker cabinet?
when I built my 2x10 cab, I didn't look at specs at all. I made it the same width as the head I would most likely use it with and tall enough to fit the speakers with a little to spare. it sounds great, maybe it could sound better but ill never know
Your right according to Celestion:
"THIELE SMALL PARAMETERS
Thiele Small parameters are useful for controlling the low frequency response of sealed or ported cabinet systems by changing the cabinet internal volume, and port dimensions. However they are of severely limited use when designing a guitar speaker cabinet.
Electric guitar speakers do not reproduce 'low' frequencies (the low E string of a lead guitar has a fundamental of 82Hz) and so the frequencies at which Thiele Small parameters have significance are mostly below the operating range.
Also, the parameters are measured at very small signal levels. Guitar speakers become non linear at very low levels compared to other types of speaker, greatly reducing the significance of Thiele Small parameters in actual speaker use. Using the Thiele Small parameters of a typical guitar speaker, you will find that halving or doubling the cabinet size makes minimal difference to the response.
They have no relevance to open back cabinets.
Guitar speakers are not recommended for use in ported cabinets (as the increase in cone excursion below the tuning frequency can cause the thin paper edge of the cone to tear).
The alternative:
https://en.wikipedia.org/wiki/Thiele/Small
So the heck with formulas, I'll just finish it the way I started it. Try sealed vs. open back, decide what I like best and fini.
Thank you again jeremy for your knowledgeable guidance. I might have spent weeks running all those calculations for no gain.