Bass preamp schematic help needed

[audioguru]

I never played an electric bass guitar. A few links in Google say they play frequencies from 41Hz to 98Hz but the harmonics go much higher.
A passive lowpass filter will need a huge inductor that might pick up hum.
I do not remember Skywalker since I reply to hundreds of threads every day.

Some electric guitar players say that the preamp must have an input impedance of at least 1M ohms. This preamp has 3M ohms:

 

[anextday]

bass preamp schematic

Good piece of info there.....But can u tell me if this circuit is fully complete and accurate

**broken link removed**

just place this link in your browser.....and if there's any errors can you correct them.
Thank you