Technical Details
Brand: Teac
Model:A-7400RX
Category:Mid High Fidelity
Application:Semi-Pro
Electronics:Solid State
Equalization:NAB
Country of Manufacture:Japan
Release dates:1976 - 1980
Tracks:1/2 Rec/Play+1/4PB
Speeds: 7 1/2, 15
Max Reel Size("): 10.5"
Number of heads: 4
Dimension: 37 X 16 × 24.5" (940 × 410 × 620mm)
Head Composition: Permalloy
Head Configuration: Stereo
# Motors: 3
Auto Reverse?:No
Voltage(s): 100v Japan, 110-120v, 220-240v
Outputs: RCA
Frequency Response:30Hz - 28kHz at 15ips 30Hz - 24kHz at 7½ Ips (3dB)
Wow and Flutter:.04% At 15 Ips - .06% At 7½ Ips
Signal-to-Noise Ratio:100dB With DBX - 65dB Without
Sound quality rating:7 / 10
Long-term reliability rating: 8/ 10
Weight: 90.2 Lbs (41 Kg)
Additional Details
Description
Top-of-the-line of the final series of the 1970s, the Teac A-7400 RX outsold the very similar A-7300 RX by a significant margin as they were essentially the same but this one had an extra 1/4 track playback head. Teac Was just getting warmed up to the idea of taking one great design and multiplying it over many different models, with different features. The early 1980s X series decks would take that make as many models as you can concept to a new level. The A-7400 was very similar to the A-7300 (2 models), Teac/Tascam 25-2 and A-7300 RX as well as the Ampex ATR 700, but this was the best of the bunch.
Additional Info
Heads Four (record and playback both high density Permaflux)
Motors (3) Direct drive DC servo capstan motor, 2 x Eddy current induction reel motors
Tape speeds 15 and 7½ ips
Frequency response (± 3dB) 15 ips 30Hz – 28kHz 7½ ips: 30Hz – 24kHz
Wow & flutter 0.04% at 15 ips, 0.06% at 7½ ips
Signal to noise ratio 100dB with dBx; 65dB without dBx
Stereo separation 80dB with dBx; 50dB without dBx at 1kHz
Harmonic distortion .4% with dBx; 0.8% without dBx at 1kHz normal operating level
Counter accuracy ±1.5% at 15 ips, play mode
Rewind speed 150 seconds for 1800ft 10½ ” NAB reel
Inputs
4 x line: 100mV impedance 50KΩ
4 x microphone: 0.25mV impedance 600Ω
Outputs
2 line: 0.3V – load impedance10KΩ
Stereo headphones jack: 8Ω
Dimensions Transport: 18½ x 18 × 11¾” (470 × 455 × 300mm)
Amplifier: 18½ x 8 × 12¼” (470 × 205 × 310mm)
Total: 37 x 16 × 24.5″ (940 × 410 × 620mm)
Weight
Transport: 61.6 lbs (28 kg)
Amplifier: 28.6 lbs (13 kg)
Total: 90.2 lbs (41 kg)