The following is a review/article about these little known speakers that I personally refurbished.
Jamo Power 120B - Made in Denmark
I got these for free because the woofer foam surrounds were TOTALLY rotten and gone.
As I didn't spend any money on them I decided to research if fixing them up would be worth the money - a quick internet trawl put these at a value of around 50-100 euros depending on the condition, so I decided buying foam surrounds would make a fun project and that these speakers would be worthy of it. Although it was a slight gamble as there is very little information on the interwebs about these 'budget' hifi speakers.
My other findings are that these were in production between 1980 1983, so these are somewhat vintage.
I don't have a lot of reference points as I listen mostly to headphones but overall I'm impressed with the sound.
My best comparison would be to Audioengine A5 although I refunded them when they went faulty, but I had them for over a year. I actually prefer these (although they are about twice the size) - so putting aside comparisons of scale and dynamics (which I believe are naturally superior due to the size), I very much prefer the smooth sound of the paper cone and the FRONT ported design. The bass is actually controlled, present, fast and musical, which is basically impossible to achieve with the older Audioengines that blast uncontrolled bass from the rear port.
The tweeters are interesting as I didn't expect a horn design to produce such an exciting but accurate/natural sound. The low bass extension and super high range extension both seem to roll off quite early but not too dramatically, but this doesn't stop them being super fun. The only thing lacking is the warmth in the mids I'm used to from my Grado RS2is and AKG k141s - the mids are however very natural, present and smooth but just a little colder/thinner then I'm used to.
I compared them in an A/B test with my Eltax Concept 200 floor standing speakers (which are coincidently also Danish but a lot more modern although super-budget) and the Jamos are superior in every way. The only thing that I might miss are the super deep rumbles of sub bass that large rear ported floor standing speakers produce for some 'epic' movie scenes and explosions.
If anyone else has any experience with these speakers I would be interested to hear your opinions.