Megatron is a powerhouse for the size and there's nothing like it on the market. It varies by driver sensitivity but I've found it works well with buds up to 300ohm. Not suprisingly, it's not built for IEMs and you'll get noise and zero volume play. You can use impedance adapters if you want but I don't like using those as I want to avoid altering FR on some of my BA sets.
Zen SL (via Defiant, with thin donuts) is a very balanced with a nice clean midrange and a controlled pinna that puts things in a comfortable position and not offensively close. It's still a vocal-centric set though, vocals male and female are lush and detailed. Staging is nice and wide and timbre is good. I'm going to do a Sunniva / Zen SL face-off as they both sit within the same price bracket. Also, the custom PK shell is bigger than some PK shells and how much you benefit will depend on your ear size but I still quite like it vs MX500. As for the pairing with Megatron, it feels well driven but definitely warmer with less transient control and macrodynamics. This isn't surprisingly really, all the marketing emphasises the potential for scaling. For the cost all-in of Zen SL & Megatron you could definitely do worse but I think buyers would be better pairing with RA2B-FE.
Zen SL (via Defiant, with thin donuts) is a very balanced with a nice clean midrange and a controlled pinna that puts things in a comfortable position and not offensively close. It's still a vocal-centric set though, vocals male and female are lush and detailed. Staging is nice and wide and timbre is good. I'm going to do a Sunniva / Zen SL face-off as they both sit within the same price bracket. Also, the custom PK shell is bigger than some PK shells and how much you benefit will depend on your ear size but I still quite like it vs MX500. As for the pairing with Megatron, it feels well driven but definitely warmer with less transient control and macrodynamics. This isn't surprisingly really, all the marketing emphasises the potential for scaling. For the cost all-in of Zen SL & Megatron you could definitely do worse but I think buyers would be better pairing with RA2B-FE.
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