The Teac V-40 is a cassette tape deck that was part of the Teac Prism 50 system, manufactured in Japan between 1981 and 1984. It features a silver-colored chassis and has dimensions of 432 x 110 x 255 mm (W x H x D), weighing approximately 5.5 kg. The device requires a power consumption of 11 W and offers various input options including Line In (60 mV, 50 kOhm), Line In DIN (60 mV, 50 kOhm), and a Microphone input (0.25 mV, > 200 Ohm). It has outputs for Line Out (300 mV, 50 kOhm), Line Out DIN (30 mV, 50 kOhm), and an 8 Ohm headphone jack. The V-40 is equipped with 2 audio heads: one for record/playback and one for erasing, and operates with a motor that ensures synchronization fluctuations of less than 0.05%. It supports various tape types with frequency response ranges of 30 - 14,000 Hz for normal tape, extending to 30 - 16,000 Hz for metal tape. The device has a distortion factor of 2.5 and a signal-to-noise ratio of 57 dB (Dolby off) or 67 dB (Dolby B on) at frequencies above 5 kHz. Additional features include a 3-digit counter and LED peak value display, with rewind times of approximately 110 seconds for a C-60 cassette.