Specifications

SPECIFICATIONS↑ TOP

TRANSPORT↑ TOP

Tape Width & Channels:

• Two Channel: ¼ inch (6.3 mm) tape, 0.075 (1.9 mm) track width.
• Four Channel: ½ inch (12.7 mm) tape, 0.075 (1.9 mm) track width.

Tape Speeds: 7½ and 15 ips (19 and 38 cm/s). Maximum deviation ±0.15%.

Rewind Time: Less than 90 secs for 2500 foot reel.

Reel Size:

• Two Channel: 5 and 7 inch plastic or 10½ inch, EIA or NAB.
• Four Channel: 10½ inch NAB.

Heads:

• Two Channel: Four head stacks: ½ erase, ¼ reproduce, ½ record, ½ reproduce.
• Four Channel: Three four-track in-line stacks: erase, record, reproduce.

Motors: Capstan: Variable speed (±7%) dc servo controlled motor. Reels: Two induction torque motors.

Flutter and Wow (measured per NAB weighted):

Tape speed	Flutter and wow
15 ips	less than 0.05%
7½ ips	less than 0.06%

ELECTRONICS↑ TOP

Connectors: Line input and line output, standard three-pin XLR. Microphone, standard ¼ inch phone jack.

Inputs:

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

Outputs:

• Line: Variable or fixed level. Fixed level: +4 dBm or −10 dBm rear panel switch selectable. Headroom: +19 dBm before clipping. Impedance: 600 ohms unbalanced (600 ohms balanced with optional transformer).
• Headphone Jack: −24 dB, nominal 8 ohms unbalanced.

Equalization: NAB standard for 7½ and 15 ips (EIA, CCIR, and IEC also available).

Signal-to-Noise Ratio (overall record/playback):

Tape speed	NAB weighted	NAB unweighted
15 ips	68 dB	65 dB
7½ ips	68 dB	65 dB

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

Crosstalk: At 1000 Hz on adjacent tracks, greater than 60 dB.

Frequency Response (overall record/reproduce):

Tape speed	±2 dB	±3 dB
15 ips (at 0 VU)	50 to 20,000 Hz	35 to 25,000 Hz
7½ ips (at −10 dB)	50 to 18,000 Hz	40 to 20,000 Hz

Selective Reproduce Frequency Response:

Tape speed	±3 dB
15 ips	100 to 15,000 Hz
7½ ips	70 to 10,000 Hz

Distortion: Less than 1% at 1000 Hz at 185 nWb/m.

Test Oscillator Frequency: Nominal 1000 Hz.

PHYSICAL↑ TOP

Operating Position: Vertical or horizontal.

Power Requirements: 117 volts, 60 Hz, single phase ac, 105 watts. Or 220/240 volts, 50 Hz, single phase ac, 105 watts.

Operating Environment: 40° to 104°F (5° to 40°C). 20 to 80% RH.

Storage Environment: −5° to 113°F (−20° to 45°C). 10 to 80% RH.

Weight: Two Channel: 64 lbs (29 kg). Four Channel: 84 lbs (38 kg).

Mounting: Table top console (standard). Floor console pedestal (optional).

Standard Accessories: Table top console, dc capstan servo, empty 10½ inch NAB reel, NAB reel precision hold down knob, fuse, NAB reel shims.

Optional Accessories: Balanced low Z mic input transformers, balanced 600 ohm line input and output transformers, remote control unit, floor console pedestal.

Size:

Table-top console	Two Channel	Four Channel
Height	19 inches (483 mm)	26 inches (660 mm)
Width	16½ inches (419 mm)	16½ inches (419 mm)
Depth	25 inches (635 mm)	25 inches (635 mm)

Otari reserves the right to change specifications without notice or obligation.

EFFECTIVE NOVEMBER 1976

DISTRIBUTED BY: Otari Corporation, 981 Industrial Road, San Carlos, California 94070. (415) 593-1648. TWX 910-376-4890.

Otari Electric Co., Ltd., 4-29-18 Minami Ogikubo, Suginami-ku, Tokyo 167, Japan. (03) 333-9631. Telex J26604.

Printed in U.S.A.—S—114—11-76.