Well the SPL suggestion was to see if you might get better response out of your speakers tonally at lower SPL levels, in that room,,, Also you can level match the speakers with it, as you mentioned doing that not as thorough as using an SPL meter.
I personally mix at around 75db for the most part. Checking at higher levels. But I'm using Scepter 8's from Presonus, in a dedicated treated room.
But no need to be concerned about that. Your room is most of the issue. Well, it is how your using it, that can be improved.
- Your speakers only reproducing down to 70Hz means,,, You really need some better ranged monitors. And then learn them and the new room set up.
______ But don't spend a dime yet ____________ !!! lol
I would face the outer brick wall. About 38% sitting position from that wall, and Center of the left and right walls.
Speakers should NOT be the same distance from front and side walls...
I'm guessing the room is 12" x 26" or so, from your given measurements. Which is a good size really. Real true dimensions is what I was looking for though lol. I'll ask again if really needed, all good
.
I had a room similar in dimensions. Spent about $900 for treatment from GIK Acoustics...
Email the one nearest you in your Country. Improved my room by 80% or better. Translation was great so I could make my mix moves with confidence. I put a current mix I was working on and sounded like crap, awesome !!! So I started a new mix, when almost done, rendered and hopped in my truck, cranked the stereo once I hit 40mph,,, Sounded killer !!! Listened critically when I got back home, didn't find I needed to change a thing. I didn't have to guess anymore. Now one thing all that guessing did was help train my ears.
Just not always the best training when learning all the things about mixing in a room giving false reference of your moves. Thank God I had a little live mixing experience from playing out for all those years.
With your situation, You are doing good man... You make a few changes setting up in that room correctly you will be real happy with your mixes.
That said,,,
a couple questions might help, knowing where you want to go.
- Do you just want to mix others music ?
- Do you just want to create your own music ?
- Do you want to be like Tom Scholz from Boston and do it all ?
I ask, because that answer should and can help you to get where you wanna go and know how to spend or not. I don't know ya, so don't want to suggest all this, when a little of this or that, would suit ya better. Hadn't seen it asked yet, or mentioned.
Also, since dialing this concern in a little, the Forum
Studio Building and Room Treatment has a ton of info.
If you start a post there, please share that Discussion Posts link to this discussion here. Others may find it helpful to follow along. And I'd like to as well lol