It's a plug-in unit that delivers 150 watts to produce what Marshall calls a "home-shaking" signature sound. Plus, it's incredibly versatile — you can connect directly via Bluetooth, or hook it up to your TV or record player using the HDMI, RCA, or 3.5 mm inputs.
Hence, SpaceX can’t be valued on its current profits, but only on its prospects of gigantic growth in the most pioneering of industries whose future trajectory is also unknowable. However, we do know two things about SpaceX that should give investors big worries about a $1.5 trillion valuation.
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But I would argue that every layer below the surface exists only to serve the surface. And the moment it starts pulling you under instead of supporting you, something is broken.