MB Quart Amp Differences?

[Bettr n' Revrse 5,000+ posts]

Hey guys I would like a little input on what makes the all there lines different and which one you guys prefer? The product lines being- Discus, Onyx, Reference, and Premium... I mostly looking at there Mono's but wanna hear about them all...

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[kr15 5,000+ posts]

Onyx is supposedly just the newer Discus line, I am unsure about the actual differences of the others