Model:F44 'Fine Line'
Country of Manufacture:USA
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Stereo
Frequency Response:(all 3 dB): 7½ ips: 50Hz - 15kHz
Wow and Flutter:0.15% at 7½ ips
Sound quality rating:7 / 10
Long-term reliability rating: 7 / 10
The F-44 Fine Line was only available for about 2 years (64-65) and was the last consumer tubed Ampex.
The big improvement in the F-44 was going to a Hysteresis motor in place of the induction motors used in older models.
Also note dual meters instead of the single switchable meter found on both the 960 and 1200 series.
A four-track, tube powered portable professional stereo recorder with two speeds (7½ & 3¾ ips) and a frequency response of 50Hz to 15kHz +-2dB.
Additional InfoDimensions: F4452: 13 x 15 x 7½" (330 x 381 x 190 mm) Weight: F4452: 28 lbs (12.7 kg) F4460: 17½ x 15 x 9½" (444.5 x 381 x 241 mm) / F4460: 36 lbs (16.4 kg) / quarter-track stereo Audio output power: 1.5 watts per channel (F4470)
These are made to just about run forever, and sound pretty good the whole time. They are mechanically a bit noisy, but they play back and record tapes very very well.