View attachment 222531
The 6301 is more of a professional (FR band-limited) studio monitor than full-range hi-fi speaker in terms of its overall design and purpose.
Here's a balanced review with English translation from German:
Test: Fostex 6301 NX, near field monitor
But, be warned: I've also mentioned once or twice in the forums that the highs have a rather muted character esp. off-axis that some may find lacking or dull.
In this video, a larger BR design speaker of the same driver brand is compared with the Markaudio CHR-70:
Markaudio's metal driver (this one specifically -- can't say for the rest as I have no first-hand experience) has more biting/"spicy" highs which probably is the intent of the designer himself:
In the vast majority of these DIY designs that I've seen on the net, they often employ quite large boxes that still need external amplification ... so, to me, the whole idea of employing such small single full-range drivers seems not so ideal if you really want something "practical" and compact -- or something to travel with for work. Though, if I were to make my own (preferably sealed) single full-range driver speaker(s), I think it's probably going to be more a DIY exercise for my own enjoyment or as a center audio display (yet also very functional -- with wireless BT) "art piece" for my small living room.
Seas Prestige FU10RB H1600-08 4" Full Range
4” full range driver offering an extraordinary performance and sound clarity. New Curv cone, a woven polypropylene with excellent internal damping together with perfectly matched moving parts gives a smooth, extended frequency response.
www.madisoundspeakerstore.com
Scanspeak Discovery 10F/8414G-10 4" Full Range
Scan-speak Discovery 10F/8414G-10 4" Fiberglass Cone Full Range
www.madisoundspeakerstore.com
Markaudio CHR-120-Champagne 6" Metal Cone Full Range
Markaudio CHR-120-Champagne 6" Metal Cone Full Range
www.madisoundspeakerstore.com
The latter 6" driver is
@ppataki's choice for his own on-going project here:
Fullrange speaker project based on Markaudio CHR-120