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Join Date: Jan 2001
Location: upstate NY
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There are several companies which sell EQ units which are intended just for subwoofers.
The proprietary room equalizations provided by Pioneer and Yamaha don't EQ the sub.
I don't recall if there's any information about the limitations of the EQ software provided by Harman Kardon and Sony. They both tend not to publish details.
Audyssey 2EQ does not EQ the sub. It's used by Cambridge and in some entry-level Onkyo models.
Brands which I'm sure have some models which include equalization software that can handle subwoofers are Onkyo/Integra, Denon/Marantz, NAD, McIntosh and Anthem.
Don't forget that many high-end brands still don't provide any room equalization at all.
Trinnov sells an external equalization unit. It normally is used in between a pre/pro and the associated amps.
Unfortunately, you're unlikely to find any equipment which is truly future proof. In particular, there are likely to be changes in 4K video resolution support in the next few years, with 8K supported a few years after that.
So far as 4-year hardware reliability is concerned, you usually shouldn't base future performance expectations on past individual experiences. Keeping electronics cold tends to make it last longer, but that's just a statistical bias when you consider many units. There are always going to be some units which fail unexpectedly.
I hope this helps a little.
Marantz SR7009 avr + MM9000 amp --> Atmos 7.1.4
Fronts=NHT 2.9+AC2, FH+TM=DefTech PM1000, LCR+TM amped