A saddle-stitched booklet - Nippon Columbia’s joint catalog VOL.1, June 1978. The bulk of it (pages 1-38) covers the DENON lineup: separate preamplifiers and power amplifiers PRA/POA-1001 and PRA/POA-1003, integrated amps PMA-850 and PMA-830 with class A DC-coupled circuit (no capacitors in the signal path), tuners TU-500/501/451, cassette decks DR-750 and DR-350, reel-to-reel deck DH-510, and cassette tapes DX5 and DX3. One spread is dedicated to DENON’s PCC (Non-Cross Talk Cross-Link) technology - a circuit design for minimizing channel crosstalk. The COLUMBIA section (pages 39-58) covers the Beat25V and Beat25 system combos, modular stereo components, cassette tapes, compact telephone sets, Stylaphone units, and color televisions.