Altec 1567a mixerComplete electronics rebuild. Custom Cinemag input transformers. Burned in 24 hours. I had the rebuild done in 2014, and it has sat on a shelf since. It was recently tested by applying a 10k signal at each channel input. The output levels were good. No further testing was done. Thus, It's selling at well below market value. It will either need to be wired into a patchbay for full testing or pigtails wired to it. If you don't understand what I'm referring to, you probably shouldn't be considering this ad. I've misplaced the knobs I bought for it, so I'm including a set of Bakelite RCA knobs. Replacements are usually available on eBay. The Black Keys use two 1567a mixers when recording vocals and guitars for that analog mojo Motown used one, but not exclusively, on many recordings. The Altec 1567a doesn't come on the market often. Google Altec 1567a and you probably be surprised by the prices.If you are not familiar with this model, please do your research before bidding. Thanks.