@OP. The drive unit in question not only has a rapidly falling frequency response below 150hz, but it has a strongly rising response above 1.5k - and a ragged one that's typical of whizzer cone "full range" drive units. The latter will exacerbate the sense that the speaker has no bass. The problem with adding a bass unit is that you will have to match sensitivity as well as frequency response. That will be nigh on impossible to do without using a crossover. So you would be better using a sub. At a philosophical level you will still be able to view your speaker as having no crossover - since that will be in the sub.
Single driver full range speakers
Hi,
I am a simple home hobbiest. I've built an great sounding full range single speaker set (so no cross-over,, and that's the point. I don't want a x-over).
But of course it lacks terribly in bass. Is it possible (is it commonly done?) to add a woofer into the cabinet with no cross-over (again, simple straight wire to amp). Would it require wiring in parallel or series?
Currently each speaker has one TangBand W8-1808 full range 8" driver and sounds very good.
Thanks in advance, I really would like to know if this is possible (safe?) to do.
Rob