Realistic Optimus 2B (aka NOVA-6) speakers (improving in increments)Bought a pair on FB Mktplc, about 2 years ago, and they are in v. good cond.
Before I begin this post, please let me know if you are aware of the official schematic diagram of the x-over. In the photos below, there are some shots of the OEM x-over. I replaced orig. 6.8uF electro with a high-quality film.
After some initial tweaking, I compared them (using mono tracks) to my 1991 B&W 610's. With the L-pad (3-way switch on rear port) on HIGH, the 2Bs sound decent, but not as robust as the 610's. The 2B's also need more volume, but I do see (hear) some potential for improvement with small, incremental upgrades.
First, I'll start with the x-over (maybe replacing with ready-built 2-way), but I'm not certain what would be a good x-over frequency for the turnover?
I want to hold off on replacing the drivers, as OEMs are in good shape, want to preserve the orig. aesthetic, and am curious as to how far I can push an all-paper 70's budget design.
REFS:
https://audiokarma.org/forums/threads/realistic-nova-6-refurbishment.333149/https://audiokarma.org/forums/threads/realistic-optimus-2b-near-mint.588645/https://www.hifi-guide.com/loudspeaker/realistic-optimus-2b/https://dn721600.ca.archive.org/0/items/realistic-optimus/Realistic%20Optimus%20.jpg
