Dipose equalize a 27 band, a microphone measuring sound pressure and a 27 annaliseur spectrum bands and a pink noise generator.
The connector type is balanced (XLR or Jack in)
It is a graphic equalizer slider: so visual and easy to use.
Spectrum analysis is also simple to implement since it is sufficient to select a desired volume level, and adjust according to the little colored LEDs that display the pressure measurement access in real time.
The gain or attenuation is very effective because I was able to successfully add sound rooms absolutely rotten (style gym with a large glass)
It is very effective and very practical. I use it for 11 years (2 RANE RE 27 -> one per channel. In each room or outdoor scene, I gauge the sound system in 5 minutes. It only remains for me qu'affiner the settings in the balance: the largest is already done.
I still slightly regret the absence of storage or automatic correction.
I have not tried many other equalization because I quickly opted for this model.