K4003 as harmonica amp


I’ve built a k4003 amp and it sounds great. Signal is loud and clear. I’ve decided I’d like to use the amp for my harmonica mic, a Shure Green Bullet ( Load Impedance Range minimum 100 kΩ. Output Clipping Level at 1kHz, open circuit voltage -38.0 dBV/Pa (13 mV) [1])

The input sensitivity of the K4003 reads input sensitivity: 300mV / 150Kohm

Can I connect the mic directly to the amp via 1/4 jack or should I be using any kind of pad or preamp?