In the 70s I had a Soundcrafstman preamp/eq. PE 2217 I recall the "edge wound" wring was a sales tool. The quality was good and I loved messing around with the curve. Back then I had no critical listening skills and my Bob Seger Live Bullet and Ted Nugent Double Live Gonzo records were the height of my audio palette.
Recalling the colored memory of "the good days" I recently bought a DBX 2131 on eBay for poots and giggles. It was fun isolating the frequency and tweaking the mix. HOWEVER; they are noisy. There are 2 little Chinese transformers in them that hum like a hooker.
IMO an 7 to 10 level rig will suffer using and EQ. BUT they are really fun to tinker with and great for party music. It also lets you have a hands-on learning / recognition of specific frequencies.