Recording on the Akai X-1810


New member
Hello all,
I recently acquired an Akai X-1810 reel to reel and I have some questions on how to record on it.
1. It has two sets of inputs. RCAs on the back and 1/4" on the front. Which is better to record with?
2. Are the 1/4" inputs mic or line level and are they low or high impedance?
3. Also I want to run vocals and guitar through the machine to color the signal before I go into my MBOX Pro interface for pro tools. Can I do this? If I record onto tape first then go to pro tools would that sound better? Which way provides the most coloration?

Any advice is welcome as I am new to using a reel to reel.
Thanks! :D