While working in the music business, I ‘accumulated’ some audio equipment for playback at home. One of the items I purchased in the mid-1990s is a Gemini PMX-3500 to connect most of my components. Since returning to California some 15+ years ago, I’ve lived in smaller homes and have been selling most of my equipment. This is that Gemini PMX-3500 which has been packed away. I have not tested it since finding it as I no longer have any components. This Gemini is dusty and hasn't been connected to anything for 15 years, but in an analog setup it will probably work just fine. Here are some details:

1. Gemini PMX-3500 Mixing board.   
2. Technically it’s also known as a PreAmp Mixer/Sound Effect/EQ/Echo.
3. It has 7 sliders for each channel (Left and Right). 
4. Both channels include: 
1. 60hz
2. 150hz
3. 400hz
4. 1k
5. 2.4k
6. 8k
7. 16k. 
8. (NOTE: One of the actual sliders is missing: Left Channel, 2.4k. Probably a simple fix.)

1. The board has 6 output options: 
1. DJMIC/AUTO MUTE
2. CH-1
3. CH-2
4. CH-3
5. CH-4
6. MASTER
2. Light indicators include:
1. Power
2. Equalizer
3. Echo
4. CH-1
5. CH-2
6. CH-3
7. CH-4.
3. Plenty more options on this wonderfully compact board.
4. Dimensions are: 
1. operating surface is 19” wide, 9 1/2” tall; 
2. back height is about 5”; 
3. front height is about 3 1/2”. 

This Gemini PMX 3500 will be shipped for a flat fee of $35 to addresses in the lower 48 United States. $5 more to Alaska, Hawaii and U.S. Territories. International shipping, if available, at purchaser’s expense. Unit weighs about 11 pounds.