The MX-5050 Series Data Sheet (1991) — Digital Edition · Part 3 · scan pages 3-4

Configurations and Specifications

MX-5050 SERIES CONFIGURATIONS↑ TOP

Model	MKIV-2 Desk Top	MKIV-2E Desk Top	MKIV-4 Desk Top	MKIV-8 Desk Top	BQIII Upright	BIII-F Upright	BIII-2 Upright	BIII-2E Upright
Tape Width	¼"	¼"	½"	½"	¼"	¼"	¼"	¼"
Track Configurations	2T NAB	2T DIN	4T	8T	4T	Mono	2T NAB	2T DIN

SPECIFICATIONS↑ TOP

	MKIV-2 Desk Top	MKIV-2E Desk Top	MKIV-4 Desk Top	MKIV-8 Desk Top	BQIII Upright	BIII-F Upright	BIII-2 Upright	BIII-2E Upright
TRANSPORT
Head Configurations:	Mono Version; Reproduce, Erase, Record, Reproduce 2CH NAB version (2mm track width); Reproduce, Erase, Record, Reproduce 4CH version (1mm track width); Erase, Record, Reproduce	←	4CH version (1.8mm track width); Erase, Record, Reproduce; 8CH version (1mm track width); Erase, Record, Reproduce	←	Mono Version; Reproduce, Erase, Record, Reproduce 2CH NAB version (2mm track width); Reproduce, Erase, Record, Reproduce 4CH version (1mm track width); Erase, Record, Reproduce	←	←	←
Motors:	D.C. brushless type quartz PLL servo-controlled capstan motor, two induction reel motors	←	←	←	←	←	←	←
Reel Size:	NAB 10.5" maximum	←	←	←	←	←	←	←
¹Tape Speed:	15 ips/7.5 ips & 7.5 ips/3.75 ips Accuracy ±0.2% Max deviation: 0.2%	←	←	←	←	←	←	←
Variable Speed Range:	Variable by ±20% of nominal speed (Resolution 0.01%)	←	←	←	←	←	←	←
Wow & Flutter: (Peak WTD DIN 45507)	15 ips Max. ±0.06% 7.5 ips Max. ±0.08% 3.75 ips Max. ±0.12%	←	←	←	←	←	←	←
Start Time:	Time required to reacn the speed at which wow & flutter value is two times of the specified value.	←	←	←	←	←	←	←
	15 ips Max. 0.5 sec. 7.5 ips Max. 0.4 sec. 3.75 ips Max. 0.3 sec.	←	15 ips Max. 0.7 sec. 7.5 ips Max. 0.5 sec. 3.75 ips Max. 0.4 sec.	←	15 ips Max. 0.5 sec. 7.5 ips Max. 0.4 sec. 3.75 ips Max. 0.3 sec.	←	←	←
Stop Time:	Time required to stop from Play mode	←	←	←	←	←	←	←
	15 ips Max. 0.5 sec. 7.5 ips Max. 0.3 sec. 3.75 ips Max. 0.3 sec.	←	15 ips Max. 0.7 sec. 7.5 ips Max. 0.5 sec. 3.75 ips Max. 0.4 sec.	←	15 ips Max. 0.5 sec. 7.5 ips Max. 0.3 sec. 3.75 ips Max. 0.3 sec.	←	←	←
Fast Winding Time: (with 2 500 ft tape)	Max. 110 sec. for 50 Hz AC Line frequency Max. 90 sec. for 60 Hz AC Line frequency	←	←	←	←	←	←	←
ELECTRONICS
Inputs:
Line:	Transformerless active balanced (transformer option), 10 kOhm, 20 Hz to 20 kHz	←	←	←	←	←	←	←
Nominal Level:	+4 dBu	←	+4 dBu/-16 dBu Switchable	←	←	+4 dBu	←	←
Max. Level:	+30 dBu	←	←	←	←	←	←	←
Mic:	Transformerless active balanced 10 kOhm Min. Level: -70 dBu/-50 dBu/Off Switchable	←	Unbalanced, 5 kOhm Min. level: -70 dBu/ -50 dBu Switchable	No Mic. input	Unbalanced, 5 kOhm Min. level: -70 dBu/ -50 dBu Switchable	Transformerless active balanced 10 kOhm Min. Level: -70 dBu/-50 dBu/Off Switchable	←	←
Outputs: Line:	Transformerless active balanced, 5 Ohm (20 Hz to 20 kHz)	←	←	←	←	←	←	←
Load Impedance:	Min. 200 Ohm	←	Min. 600 Ohm	←	←	Min. 200 Ohm	←	←
Nominal Level:	+4 dBu/-16 dBu Switchable	←	←	←	←	←	←	←
Max. Level:	+26 dBu for 200 Ohm load	←	+26 dBu for 600 Ohm load	←	←	+26 dBu for 200 Ohm load	←	←
With the optional output transformer
Output Impedance:	Max. 5 Ohm (20 Hz to 20 kHz)	←	←	←	←	Max. 50 Ohm (20 Hz to 20 kHz)	←	←
Load Impedance:	Min. 200 Ohm	←	Min. 600 Ohm	Min. 600 Ohm	Min. 600 Ohm	Min. 200 Ohm	←	←
Phone Output:	Connector: ¼" standard stereo phone jack load impedance 8 Ohm	←	←	←	←	←	←	←
E.Q. Standards:	NAB/IEC selectable	←	NAB fixed (IEC version option)	IEC fixed (NAB version option)	NAB fixed (IEC version option)	NAB/IEC selectable	←	←
Frequency Response:
REC/REP:	15 ips (O VU) 30 -20 kHz, ±2dB	←	15 ips (O VU) 40 -20 kHz, +2/-3dB	←	←	15 ips (O VU) 30 -20 kHz, ±2dB	←	←
	7.5 ips (-1 O VU) 30 -18 kHz, ±2dB	←	7.5 ips (-1 O VU) 20 -18 kHz, +2/-3dB	←	←	7.5 ips (-1 O VU) 30 -18 kHz, ±2dB	←	←
	3.75 ips (-2 O VU) 20 -10 kHz, ±2dB	←	3.75 ips (-2 O VU) 20 -10 kHz, +2/-3dB	←	←	3.75 ips (-2 O VU) 20 -10 kHz, ±2dB	←	←
REC/SEL-REP:	15 ips (O VU) 250 -7.5 kHz, ±3dB	←	15 ips (O VU) 50 -15 kHz, ±3dB	←	←	15 ips (O VU) 250- 7.5 kHz, ±3dB	←	←
	7.5 ips (-1 O VU) 250 -5 kHz, ±3dB	←	7.5 ips (-1 O VU) 50 -12 kHz, ±3dB	←	←	7.5 ips (-1 O VU) 250 -5 kHz, ±3dB	←	←
	3.75 ips (-2 O VU) 250 -2.5 kHz, ±3dB	←	3.75 ips (-2 O VU) 50 -8 kHz, ±3dB	←	←	3.75 ips (-2 O VU) 250 -2.5 kHz, ±3dB	←	←
Operating Level:	NAB SRL = 250n Wb/m IEC SRL = 320 (open circuit flux) n Wb/m	←	←	←	←	←	←	←

Site note

Most rows of the specifications grid are printed once across a group of model columns rather than machine by machine, and the groups differ from row to row: Motors, Reel Size and Tape Speed run the full width; Head Configurations and the two timing blocks split three ways; Mic, the second Load Impedance row and E.Q. Standards split five ways; and Output Impedance splits only between the first five machines and the last three. The three-way rows do not all group alike: Head Configurations and the Start and Stop timings split MKIV-2 and 2E / MKIV-4 and 8 / the four upright machines, while the input Nominal Level, the output Load Impedance and Max. Level, and every frequency response row split MKIV-2 and 2E / MKIV-4, MKIV-8 and BQIII / BIII-F, BIII-2 and BIII-2E — the BQIII goes with the desk-top four-and-eight-track machines in the second set and with the uprights in the first. A GFM table has to have a cell in every column, so the leftmost column of each printed span carries the value and the columns it covers carry ←. Nothing is claimed here that the sheet does not print — the arrows mark the extent of a value the sheet set once.

SPECIFICATIONS (continued)↑ TOP

Signal-To-Noise Ratio: Measured with respect to a recording level of 1,040 n Wb/m for 15, 7.5 ips and 740 n Wb/m for 3.75 ips

Unwtd: Using a 30 Hz to 18 kHz RC filter

Wtd: Using a NAB or ANSI "A" weighting filter and a 1 kHz reference.

Site note

The sheet prints the signal-to-noise figures as a single table in which every machine is split into a pair of Unwtd and Wtd sub-columns — eighteen columns across, counting the speed and equalisation labels. This edition splits that one printed table into the two below, an unweighted half and a weighted half, each carrying the same eight machines and the same six speed/equalisation rows. No figure is changed, added or dropped; only the arrangement differs from the sheet, so a reader comparing this page against the scan will find one table there where there are two here. The measurement conditions above govern both halves, as they do in the print. The printed Unwtd and Wtd sub-labels are not repeated in the table heads, because each table's own heading says which half it is; the track widths printed beside them — 2mm for the two NAB two-track machines, 2.75mm for the two DIN two-track machines — are kept in the model heads, where the figures they qualify are. The speed label is printed once for each IEC/NAB pair, as it is here: the NAB row belongs to the speed named in the row above it.

Signal-to-noise ratio, unweighted↑ TOP

Model	MKIV-2 Desk Top 2mm	MKIV-2E Desk Top 2.75mm	MKIV-4 Desk Top	MKIV-8 Desk Top	BQIII Upright	BIII-F Upright	BIII-2 Upright 2mm	BIII-2E Upright 2.75mm
15 ips IEC	71	72	69	66	66	75	71	72
NAB	69	70	67	64	64	73	69	70
7.5 ips IEC	68	69	66	63	63	72	68	69
NAB	71	72	69	66	66	75	71	72
3.75 ips IEC	64	65	62	59	59	68	64	65
NAB	64	65	62	59	59	68	64	65

Signal-to-noise ratio, weighted↑ TOP

Model	MKIV-2 Desk Top 2mm	MKIV-2E Desk Top 2.75mm	MKIV-4 Desk Top	MKIV-8 Desk Top	BQIII Upright	BIII-F Upright	BIII-2 Upright 2mm	BIII-2E Upright 2.75mm
15 ips IEC	74	75	72	69	69	78	74	75
NAB	72	73	70	67	67	76	72	73
7.5 ips IEC	71	72	69	66	66	75	71	72
NAB	73	74	71	68	68	77	73	74
3.75 ips IEC	67	68	65	62	62	71	67	68
NAB	67	68	65	62	62	71	67	68


Distortion:	15 ips, 1 kHz, 250 n Wb/m	←	←	←	←	←	←	←
	Max. 0.3%	←	Max. 0.5%	←	←	Max. 0.3%	←	←
Crosstalk:	Between adjacent audio tracks, Recording Signal: 1 kHz	←	←	←	←	←	←	←
(REC/REP)	Min. 55 dB	Min. 48 dB	Min. 65 dB	Min. 55 dB	←		Min. 55 dB	Min. 48 dB
Depth of Erasure:	1 kHz, 1040 n Wb/m, 15 ips	←	←	←	←	←	←	←
	Min. 75 dB	Min. 70 dB	Min. 70 dB	←	Min. 72 dB	Min. 75 dB	Min. 75 dB	Min. 70 dB
Test Oscillator Frequency:	1 kHz/10 kHz Sine Wave	←	100/1 kHz/10 kHz Sine Wave	←	←	1 kHz/10 kHz Sine Wave	←	←
Bias, Erase Frequency:	133 kHz	←	192 kHz	←	←	133 kHz	←	←
Power Requirements:	100, 117, 200, 240 V ±10% 50/60 Hz Single Phase AC	←	←	←	←	←	←	←
	100 VA	←	←	150 VA	100 VA	←	←	←
Environmental Condition:	Operation: 5° to 40°C (41° to 104°F) Storage: -20° to 45°C (-4° to 113°F)	←	←	←	←	←	←	←
Dimension:	480mm x 430 mm x 680 mm (Height x Width x Depth)	←	←	←	←	←	←	←
Weight:	30 Kg	←	32 Kg	35 Kg	27 Kg	24 Kg	←	←

Site note

This last table continues the specifications grid above it, over the same eight model columns in the same order, and so is left without a head of its own, the way a table continued across a page break is. Its rows are grouped as the sheet groups them, and the groups differ from row to row: Distortion, Test Oscillator Frequency and Bias, Erase Frequency split as 1-2 / 3-5 / 6-8; Depth of Erasure splits as 1 / 2 / 3-4 / 5 / 6 / 7 / 8; Power Requirements as 1-3 / 4 / 5-8; Weight as 1-2 / 3 / 4 / 5 / 6-8; and Crosstalk as 1 / 2 / 3 / 4-5 / 7 / 8, with the BIII-F column left empty — the sheet prints no crosstalk figure for the mono machine, which has no adjacent audio tracks. Each measurement condition is printed once across the full width above the figures it governs. The leftmost column of each printed span carries the value and the columns it covers carry ←.

NOTE 1: B-III & MARK IV-2 models offer 3 speeds switch selectable from 15/7.5 ips or 7.5/3.75 ips speed pairs. The 7.5/3.75 ips pair is optional on BQ-III & MARK IV-4 & 8 models.

Manufactured in Japan by Otari, Inc.
Otari reserves the right to change specifications without notice or obligation.

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Phone: (415) 341-5900
Fax: (415) 341-7200
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Otari Inc.
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Japan
Phone: (0424) 81-8626
Fax: (0424) 81-8633
Telex: J26604 OTRDENKI

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United Kingdom
Phone: (0753) 580777
Fax: (0753) 42600
Telex: 849453 OTARI G

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(Osterath)
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Phone: 02159/50861-3
Fax: 02159/1778
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#07-05 Aljunied Industrial Complex
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Phone: (65) 743-7711
Fax: (65) 743-6430
Telex: RS36935 OTARI

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