Yes, as Bob says, the big question is how do you record the audio? i.e. What kind of mics and where they are placed - I've done some projects with 2 x Rode NT1A mics suspended with wire above the right and left of stage, just in front of the curtains, and obtained extremely clear sound which hardly needed touching..

Yes I meant “Amateur Theatre” lol. I never was good at typing…..

I am using a Rode StereoVideoMic with an Sony FX7 Camera. I put the Rode’s mic on its own stand and patch it into the Camera. I keep the mic and stand next to the Camera in the back of the Theatre. The sound is OK.

I have used the Paragraphic EQ with some success. I end up boosting the Bass around 80 – 300 Hz, Boost the Midrange 1 – 1.5 k Hz, and sometimes brighten the highs around 10k Hz. I’m not sure if this is really helping or I am just boosting the gain slightly and it sounds different because it is slightly louder.

Using a stereo mic to cover this kind of event is a good move. The stereo image gives the listener the ability to localise the sound source and hence hear them better. Problem is that far back from the stage the stereo image could be quite muddled by reflections from the walls and ceiling of the venue plus you may also pickup other unwanted sounds.
Have a look at the polar response of the Rode mic. You should aim to position the mic at a distance from the stage so that the usable area of the stage is just inside the two lobes of the mic. That'll give you a starting point, moving backwards and forwards from there you might find a better sweet spot. Depending on stage design positioning the mic up high but angled down onto the stage would also be a position worth trying.
Once you have your mic in the best possible position to get a clean, dry sound you then have something to work with in post. Certainly try experimenting with Eq however with the mic correctly positioned you might find you need less of it. After your Eq try using a little compression. A ratio of between 1.5 to 3 is all you need. Adjust the threshold to suit the level of the signal, monitor the meters to ensure the compressor is actually compressing while adjusting the threshold. Typical threshold setting would be -12 to -20dB. You'll likely see Presets labelled 'Voice', they're generally way overboard for this application.

Bob.

I purchased two Rode Stereo Videomics to go on my videocameras, and I've found they're not great at all once the unamplified sound source is more than a few feet away. I taped an a cappella concert in May, and I put a Sony D50 about 10 feet away in front of a group of singers, and then the two Rode Stereo Videomics on stands about the same distance. I ended up just muting the audio tracks using the Rode mics, and going just with the D50 track. It wasn't even in the same league as far as quality. Now, the Videomics sound great with either amplified bands or if I put it on a boom near a person speaking. But in my experience, unless I'm doing something wrong (which is totally possible!), you're going to be hard pressed to have those mics give you a strong audio signal recording amateur theater.