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RB-81 II Internal Pics


adam2434

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Got a pair of RB-81 II for the workout room.  I like to check out the internals of new speakers, and thought I’d post a couple pics and observations, as well a couple questions.

 

It’s nice to see that they have a cross-brace.

 

No electrolytic capacitors in this view of the crossover.  Is it possible that some components, including electrolytics, are mounted on the other side of the board?

 

The front baffle is around 7/8” thick.

 

The woofer and tweeter magnets are pretty robust.  For comparison, the tweeter magnet is about the same size as the 5” midrange magnet from an Infinity SS-2005 that I have apart.  The woofer magnet is about twice as big as the Infinity’s 8” woofer magnet.

 

Overall, I think the RB-81 II has pretty darn good build/parts quality, except for the plastic binding post nuts.

 

I’ve seen a couple horn-damping mods on Reference Series horns.  When I had a RB-81 II open yesterday, I wondered about whether a heavy layer of silicone-based adhesive or RTV would dampen the horn and have a positive impact on sound quality.  Thoughts?

 

 

 

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