I just found out that the drivers used in the concert series are different from the openly available Seas Excel drivers. Apparently the excel tweeter and woofer on the concert 8's were exclusively made for the jamo.
For example these are the model numbers of the excel woofers available on the open market which are 8 ohms.
20154
20155
23154
23155
23156
24154
and these are the tweeters:
20143
20145
20449
21452
However the ones on the concert 8 are marked 4 ohms, and the model number is
For tweeter is 20531
For woofer is 20525
They apparently look the same from the front but are customized on the rear.
EDIT: found this pic for the internals:
Quite a good bit of internal padding, looks like a good 2.5" thick.
The internal wire appears to be different from the Jamo OFC cable I have. Might have to get a similar wire in the future for optimal performance.
PS. For future / Internets reference I found the service reference for the crossover, here:
Hmmm, this thread is turning into my blog =S LOL!
If someone doesnt mind, could someone with crossover knowledge help me understand the above crossover and what it means.
The reason why I'm asking is because the d830's crossover is known to be a little biased towards the highs. Jamo corrected this
in the jamo d870 with treble adjustment knobs like the ones in the pic below, so I'm just trying to understand.