This loudspeaker needs the JBL 2226H. Some people consider the 2035 to be an economy version of the 2226 - and it is that in some sense - but it doesn't provide the same response curve and so cannot be used as a substitute driver in the four Pi loudspeaker.
Please send me the plans for the 4 Pi. Thank you very much!
I have been slowly acquiring parts here and there. I have the JBL 2226H now and need to save for the B&C DE250. In the interim (maybe) I have a pair of PRV D290py. Would that be a reasonable substitute as I fund raise?