Category:Mid High Fidelity (most Japanese recorders fall into this category)
Country of Manufacture:Germany
Release dates:1961 - 1964
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Stereo
Voltage(s): Multi, 220-240v
Frequency Response:7½ ips: 30Hz - 20kHz
Wow and Flutter:less than 0.2% at 7½ ips
Signal-to-Noise Ratio:better than 40dB
Sound quality rating:6 / 10
Long-term reliability rating: 6 / 10
A German-made quarter-track stereo recorder with three separate heads, two speeds (7½ and 3¾ ips), a 7″ inch reel capacity and internal 3.6 watt stereo amp driving a single speaker which could be used for monitoring left, right or both channels.
This was a hybrid design, employing transistorized preamps, tubes for the power output stages and record level indication .A versatile head arrangement allowed heads and amplifiers to be interchanged for various monitoring and echo effects.
The MT158 was almost identical to the MT157 but made for the US market.
Rewind speed: 250 seconds for 2,400 ft tape / Audio output power: mono: 3.5 watts, stereo: 1.8 watts per channel / Valve complememt: ECC85 x 2. EL95 x 3. EAM86, 2 transistors / Inputs: microphone 0.07mV at 200 ohms, radio 200mV, phono 100mV / Outputs: 1.4 V max at radio or stereo connector / Speaker(s): single internal, switchable for either channel or both / Weight: 29 lbs (13.2kg) / quarter-track stereo