King of PHILIPS tape recorders, this is the PHILIPS N4520 reel to reel tape recorder introduced to the market at the end of 1978 begining of 1979. This high quality 3 motor 3 head tape recorder was available both as a 4-track recorder (N4520) and 2 track recorder (N4522) both featuring 38, 19 and 9.5 cm/s tape speeds. The reel drives were using direct drive motors while the capstan drive was using a belt drive PLL Quartz controlled motor. A high precision digital display was used to measure tape length in meter and decimeter. The use of FSX/Ferrite heads and a continuosly variable BIAS made possible to achive high quality recordings with speeds up to 38 cm/s. There is provision for separate microphone/DIN and line level input that can be mixed together while the sound-on-sound function could be used by home musicians to record their multi-instrumental (vocal) recordings. Accurate recording levels can be achieved with the use of two needle type selectable VU/Peak level meters with Peak LED level. For fast winding there is a variable speed control while for headphone output there is a separate headphone amplifier. Technical data for N4520: Frequency response 30-26,000 Hz (38 cm/s) 30-20,000 Hz (19 cm/s) Signal to noise: 64 dB (38/19 cm/s) Dimensions: 530 W x 527 H x 230 D mm Weight: 25 kg.