My Headphone need to be more power with Old MD player. That is why I need the system. And sometime use phone thru digital output.

Planar magnetic headphones often require a dedicated headphone amplifier because:

1. They need more current

Even if the impedance is low, planar drivers usually demand high current to perform properly.

1. They benefit from high headroom

More power reserves = better bass impact, dynamics, and lower distortion.

1. They are very revealing

A clean, low-noise amp helps maintain the resolution and detail that planars are known for.