For sale: Philips OM931 hybrid power amplifier module as sold in the late 70s and begin 80s. High specs and good sound. In total 3; 1 is new and unused, the other 2 are taken from an working amplifier as used by me (these sare ideal for a repair job or for some amplifier project). Price is 20 euros for the 3. Payement by PayPal or IBAN/BIC.