This is a used ADL 1000 valve compressor.
The ADL (or Anthony Demaria Labs) 1000 comp is a mono compressor/limiter similar in design to an LA-2A. The hand matched optical attenuator and custom in/out audio transformers is the heart and sole of this unique handcrafted compressor. Its “warm,” “punchy” and if driven hard enough “crunchiness” is a true reminder of that magical rock-and-roll sound.
This ADL 1000 is in lovely condition and sounds great!