I wanted to buy this type of device from a little piece of time and
honestly, it solves many problems (especially the feedback)
and allows for a balanced sound. It can be used for the studio
(Calibrate his monitor speakers) or to the stage
(Calibrate the speakers according to the concert hall).
It can break down some bad habits in beginners (like me ...)
which sometimes tend to boost the low frequencies and high ...
For corrections, it is better to have 31 band equalizers.
This equipment generates pink noise and can provide phantom power.
The device works fine but the LED indications are not very accurate by:
7 LEDs for frequency ... But there is the possibility to change the precision: either 6 db
or 3 db. I always start with a coarse scale correction 6 dB and then
I finalized to 3 db.
The corrections are very good but obviously depend on the string sound ...
We are not in the high end but well worth its RSA 27 + / - € 150.
I have for over a year and no reliability problems.
I would definitely do it again this choice allows me to quickly get the right sound ...