And now for your next entertainment.....the plan details. First, some graphs courtesy of WinISD. Frequency response at 1 watt, cone excursion at 100W input and group delay. Red = All vents open , Blue = 3 vents open, White = 2 vents open and Green = 1 vent open. These are relative, I didn?t get down to the gnats *ss with the volume of the cab but the FR curve shape looks close to published M500 info.
And then?.. the proposed changes to the XO. The nice thing is that the switch they used is actually SPDT push button so I can switch the out to the unused ?T? and when I put the switch in ?High frequency emphasis? position it will be stock equalized response sound (I already said I thought the horn was too hot). And? in the equalized response position it should be padded in the HF ( the value of the always in circuit resistor is a Wild*ssGuess at this point) but the goal is to get to two values that result in 5 Ohms +- tolerance when the switch is closed and sound right when the switch is open.
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