Country of Manufacture:
Original Price: $190
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:(all 3 dB): 7½ ips: 50 to 9.5 kHz (TR-4). 50 to 11.5kHz (HT-225)
Wow and Flutter:less than 0.5%
Signal-to-Noise Ratio:50 dB
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
Quite similar to the earlier 9T series, the TR-4 was a portable, dual-speed, dual track machine with push-button select for either 7½ or 3¾ ips. It was also available with full width, single track heads.
Signal to noise ratio was 50dB and wow & flutter measured less than 0.5% at 7½ ips.
There was an edit key and magic eye level indicator and the in-built 5 watt amplifier drove a 6″ permanent magnet speaker.
The two input jacks (left hand side) were for radio, TV or phono and microphone. The outputs were for an external speaker and external amplifier or headphones.
The Model HT-225 Hi-Fidelity was more or less identical to the TR-4 except that it had an extended
frequency range due largely to the installation of two “woofer” speakers and a tweeter together with an LC crossover. Prices in 1954 were $190 for the TR-4 and $225 for the HT-225.