Single driver full range speakers

Hello tunehead!  Here's a suggestion for your "adding a woofer" problem. Wherever you extra woofer is located, you only want the lower frequencies to go to it, right? So, place it in series with your existing speaker and put a large (100 - 300 mfd) capacitor in parallel with the extra woofer. I suggest you get hold of six or eight 50 mfd/200volt capacitors and put them across the new woofers terminals one by one until you find the combination that works best. No need to use expensive units at this point. Trail and error will help you refine the value of that capacitor you'll need. If the new woofer is in a cabinet already, no problem. the ground (black, negative) terminal of the new woofer goes to the amp's negative output terminal. Your existing speaker's negative wire now goes to the positive (red, +) terminal of the new speaker. The highs go thru the capacitor and the lows get left behind to move the cone of the new woofer. It will look messy for a while, but an afternood of fun will let you know what value of capacitor you need. Buy a good one, Mundorf KPR or better. The load on the amp will actually be easier than before. The final location of the new woofer will make a big difference. Contact me if I haven't explained it well enough. Enjoy the music.

@tcutter - it is full range driver, low freq. can be extended by cabinet design, there are many fostex DIY solutions available. 

fostex has many drivers for 1 way speakers, price typ reflects how accurate it is: https://www.fostex.jp/en/speaker-unit/ 

@westcoastaudiophile 

I appreciate that 50Hz to 15KHz is quite extended, but I believe "full range" extends even more. I would not regard the LS3/5A with similar low end performance but a superior high end to be full range either. Perhaps we just define things differently.
 

No One Person has been able to hear in use most of the Single Driver Speaker Designs that are in use either from a Commercial or DIY Build background??

For an individual to suggest most Single Driver Speaker don't sound very good is a fantastical statement made without a solid foundation, as a result of their exposure having very very limited experiences.

At best most of the ones heard by an individual, especially an individual who expresses a negative content as their evaluation. Might have been exposed to an End Sound that to them did not sounded very good, if that is an experience had, then I am not to argue.

Any individual is limited in what is able to be experienced and only able to encounter what is a very very small proportion of the entirety of single driver speakers.
Which as a overall quantity, adds up to a minuscule amount of speakers that are actually available to have their End Sound heard and assessed. 

Where the evaluation by an individual of such a small amount of speakers is that all Speakers using Full Range Drivers are no good, is a statement that is extremely deficient in information.

I would strongly suggest such a statement is bordering on worthless.

@pindac 

I do not find any posts that state or even imply that full-range speakers do not sound good or are "no good". I do read a number of posts that detail their shortcomings, as all speakers have, and a few that question the appellation "full range".