teac model 3 question

[Surixurient]

Hi, new to the forums and new to home recording in general. I just bought a TEAC 3 for $50 and I have a few questions about it. The needle gauges need an enormous amount of signal to make it anywhere near the 'red' zone. I have my korg tr and micro on max volume and both the line and headphones outputs on them will bring the needle to almost center occasionally. With the headphones plugged into monitor on the TEAC it will be blasting loud, deafening even. So my question is, were line levels of the 70s much stronger and did headphones of the 70s have allot more resistance? Or do the needles need to be re-calibrated or have some parts replaced?

The second thing I cant figure out is how to get sound to submix, I assume the submix outputs are what to use for recording and not monitor outputs?


Thanks!