Modifying RX-CT980 has made a portable HI-FI

A Hardwood bracing, Layer of adhesive thin pwc foam,
Cotton and Layer of thick natural compressed Wool +
Discreet Tweeters were installed
behind bass reflex ports into my RX-CT980 speakers
Tape compartments covers were temporary removed.
Capacitors for twitters are installed as well
4.4 PDS Bi-AMP System
became a 4.6PDS (4 Amps / 6 Speakers is a standard on other Panasonic Platinum series models )
Tweeters are suspended on distance equals to radius
of bass ports.
It doesn't affect their work, because high freq.never
intersect with spheric low freq.
They just go thru the bass ports like beams in horn type twitters.
Tweeters and capacitors were installed according to the official Panasonic
diagram from maintenance manual.
The values of capacitors may vary /depends of impedance of your tweeters/
4,7 uf 100V would be fine in most cases.
You 'll need Electrolytic Non-Polarized Crossover Capacitors

Originally plastic is very thin on these speakers.
Vibration was insane and that was killing
entire idea of the BI-Amp system..
So now there is no vibration at ALL and
that's very decent and serious sound for a portable stereo !
i'm very proud of this machine ,
because the hardwood bracing was extremely hard to do ..
Now those speakers walls are hard just like a rock which significantly
increased the quality of sound and brought it up to a HI-FI standard!

THIS Bi-AMP MACHINE WITH 3-WAY SPEAKERS SOUNDS AMAZING NOW !

Happy listening ! View attachment 27052

 

Thank You!
Check my other products here https://sites.google.com/view/reelcassettetapes
They're way more impressive.