Electronics

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Connectors: Line input and line output, standard three-pin XLR, Microphone, standard 1/4 inch phone jack.

Inputs: Line: Minimum − 15 dBm, unbalanced 50 k ohms. Minimum − 15 dBm, balanced 600 ohms with optional transformer. Microphone: Minimum − 70 dB, unbalanced, nominal 50 k ohms (high impedance). Balanced 150/250 ohm with optional transformer.

Outputs: Line: Variable or fixed level. Fixed level: +4 dBm or −10 dBm rear panel switch selectable. Headroom: +19 dBm before clipping. Impedance: MX-5050-2S: 600 ohms unbalanced (balanced standard in U.S. and Canada). MX-5050-4S and MX-5050-QX: 600 ohms unbalanced (600 ohms balanced with optional transformer). Headphone Jack: −24 dB, nominal 8 ohms unbalanced.

Equalization: NAB standard for 3-3/4, 7-1/2 and 15 ips (EIA, CCIR, and IEC also available)

Signal to Noise Ratio (overall record/playback):

Tape Speed	Two Track, Weighted	Two Track, Unweighted	Full Track, Weighted	Full Track, Unweighted
15 ips	68 dB	65 dB	—	—
7-1/2 ips	68 dB	65 dB	69	66
3-3/4 ips	67 dB	64 dB	68	65

Measured with respect to a record level of 520 nWb/m to biased tape noise when using Ampex 456, 3M 250, or equivalent high output low noise tape.

Crosstalk: At 1000 Hz on adjacent tracks: Two track: greater than 60 dB

Frequency Response: (overall record/playback) 15 ips (at.0 VU)[sic]: 50 to 22,000 Hz ±2 dB. 30 to 25,000 Hz ±3dB. 7-1/2 ips (at 0 VU −10 dB): 50 to 18,000 Hz ±2 dB. 30 to 20,000 ±3 dB. 3-3/4 ips (at 0 VU −10 dB): 50 to 12,000 Hz ±2 dB. 30 to 15,000 ±3 dB.

Distortion: Less than 1% at 1000 Hz at 200 nWb/m.

Test Oscillator Frequency: Nominal 1000 Hz.