Country of Manufacture:Austria
Speeds: 1 7/8, 3 3/4
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Dual Track
Frequency Response:( 3 dB): 3¾ : 40 - 15kHz. 1ips: 40 - 8kHz
Wow and Flutter:<0.3%
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
The 504 was a compact twin-track mono recorder with two speeds (3¾ & 1 7/8 ips) and a seven-inch spool capacity. It was identical to the 604 but with a built-in MW and LW AM radio tuner.
Attractively styled in two-tone gray, the 404 featured a four-tube circuit (including an EM84 magic eye) with a 2.5 watt output. The tuner section used three transistors. Wow and flutter was less than 0.3%. Price when new was 3380 Austrian schillings.