This is an Audiologic MG-52E stereo EQ. Everything listed below was tested. Very clean all around. I provided many close-up pictures. 

Because these units can be years to decades old, part pirates steal good parts and try to return item with bad parts, people misuse and damage equipment, I do not accept returns of any kind, nor give refunds of any type. 
Bid only if you accept my no refund, no return policy. Otherwise, buy someone else's items. 
Allow my feedback rating to be your guide. I offer free demo to local buyers because my items are honestly described.

Testing: I use an ipod and headphones for input/output testing (neither the ipod nor headphones are included). I move methodically from one function and input to the next taking notes as I go along. I clearly state what was not tested. Plenty of pictures are provided to assess cosmetics & functionality. Zoom in and look carefully at photos. 

Ask questions before you bid. If anything bothers you about the unit, do not bid. Only what is described is included. No associated testing equipment is included.

The BAD:
1 slider knob is NOT original. I replaced it with one that made sense. More on that below.
Normal wear 

The GOOD:
Compact size, perfect for mini or midi size / desk systems
Everything works as it should.
No static anywhere
All of the following were tested and function properly:
All functions including:
Power 110V/220V (220V not tested)
Source button/function
RCA input and output 
EQ button and function
Frequencies: 100, 200, 500Hz, 1.5, 3.5, 10kHz
"Presence" Frequency of 3.5 kHz is very, very useful with bright recordings and most EQ's do not have this specific frequency. Typically, they use 2 and 4 kHz. Yamaha and others used this frequency as the presence control in their better receivers. Because this was my most used control, the replacement knob worked well as it is larger than the others and it allowed me to find it faster rather than trying to read the small lettering.

Everyone has used the pandemic as an excuse to raise shipping prices. I have to cover costs for shipping, materials and my time. I pack with care as if I were shipping item to myself. No shipping to Hawaii or Alaska.