AKAI Terecorder Model M-6 4-Track Tape Recorder

This new Terecorder is delivered COMPLETE with its TWO Hi-Fi STEREO SPEAKER SYSTEM (SS-70) composed of two high quality speakers as well as with two dynamic microphones, radio cables telephone adapter and monitor earphones.

INTRODUCTION:

The Akai Model M-6 is the most advanced high fidelity tape recorder equipped with 4-track tape heads and incorporating a 3-speed tape transport mechanism with an automatic shut-off device. It is provided complete with 4-track stereo and monaural record/playback facilities as well as means for reproducing all pre-recorded 2-track stereophonic tapes. Another important feature of Model M-6 is the two separate frequency equalizers which are designed to provide correct compensation at each of the lower tape speeds. A special circuit is provided in each channel of the stereo amplifier to emphasise the high frequency response when reproducing tapes recorded at the slow speed.

It must be realized that only because the most effi­cient design, engineering and quality control in production at AKAI was made it possible to achieve the wide frequency range of 40-20,000 C. P. S. The selection of 2-track stereo, 4-track stereo or monaural recording and playback may be instantly accomplished by the Track Selector Control located on the Head Cover.

The large clear plastic VU-METER provides easy determination of the correct recording level. Its fast speed of 15"/sec. with extremely low wow and flutter makes the Model M-6 suitable for many professional requirements which demand the highest standard in performance. The Model M-6 incorpo­rates ideal features for Broadcasting Stations for making duplicate copies of pre-recorded tapes and records. High-fidelity enthusiasts, audiophiles and radio professionals will enjoy the utmost satisfaction from regular use of the Model M-6 because of its breath-taking performance, advanced features and styling.

Type M-6 is delivered complete with its Stereo Speaker System (SS-70). Two dinamic (moving coil microphones ; seven-inch tape reels (one wish record­ing tape), phono-radio connection cables, rubber caps for tape reels, one splicing tape, capstan for 50 cycle use, capstan for 15"/sec. (tape dubbing) and instruction book printed in English.

EXCLUSIVE FEATURES :

1. Records and plays back either 4-track stereophonically or 4-track monophonically and also plays back 2-track pre-recorded stereo tapes
2. Equipped with a powerful Hysteresis Synchronous Motor which always assures constant tape speed.
3. Specially designed either for vertical or horizontal operation.
4. Two inline and accurate VU-Meters reads recording and playback levels to insure best results at all times.
5. Single internal speaker can be used for monophonic reproduction when the matched stereo speaker system (Model SS-70) is not in use.
6. A precision Index Counter is employed for instantaneous selection of any desired portion of a tape.
7. The 4-track recording/play head consists of specially treated core-materials which are being imported from West Germany and provides an excellent frequency response as good as most studio-type recording equipment.
8. Two 8-inch coaxial speakers of wide-range type are employed in the Model SS-50 speaker system to give a rich bass and treble.
9. The maximum output power of the built-in amplifier is 6 watt on each channel (total 12.watt) which is enough power to drive up to 12-inch extension speaker system.
10. Dual Head and Preamp Outlets are provided for connection direct to any other pre-amplifiers Or stereophonic amplifier.
11. Spot editing and momentary stops are easily accomplished by use of the Instant Stop Lever.
12. All operating controls are interlocked to prevent accidental selection of an incorrect operating mode.

PERFORMANCE SPECIFICATIONS :
FREQUENCY RESPONSE :	30-20,000 CPS. at 7.5"/sec. tape speed
	40-14,000 CPS. at 3.75" /sec.
HEAD FREQUENCY RESPONSE :	20-20,000 CPS. at 7.5"/sec.
	30-15,000 CPS. at 3.75" /sec.
TAPE SPEED :	7.5, 3.75 and 15"/sec.
RECORDING SYSTEM :	Inline 4-track stereo and monaural recordings. AC bias system Patent # 233093.
HEADS SET-UP	Inline 4-track stereo/monaural recording and play head, 4-track erase head with mechanical shift device.

RECORDING TIME :
	4-track stereo				4-track monaural
	3.75"/sec.	7.5"/sec.		15"/sec.	3.75" /sec.	7.5"/sec.	15"/sec.
1,200 ft. tape	2 hrs	1 hr		30 min	4 hrs	2 hrs	1 hr
1,800 ft.	3 hrs	1.5 hr		45 min	6 hrs	3 hrs	1.5 hr
2,400 ft.	4 hrs	2 hrs		1 hr	8 hrs	4 hrs	2 hrs
POWER SOURCES :			AC 100 and 117 Volt, 50/60 CPS, any voltages upon request.
POWER REQUIREMENTS :			100 Volt-Ampere.
DRIVE MOTOR			Hysteresis Synchronous Motor dynamically balanced with a cooling fan
OUTPUT POWER			6 Watts X 2.
WOW & FLUTTER			Under 0.07 % R.M.S.
CHANNEL SEPARATION			Better than 80 db. at 1,000 cycle (-3VU)
SIGNAL TO NOISE RATIO			More than 45 db.
FAST FORWARD & REWIND TIME			2.5 minutes for each operation.
TUBES USED			6267 (EF-87) X2, 12AD7 X2, 6BQ5 X2, 6AR5 X1 and 6X4 X2.
WEIGHT (NET IN CARTON)			Model M-6 ••••••••••• 46.5 Ibs. Model SS-50 ••••••••• 23 Ibs.
DIMENSIONS :			Model M-6-14" X 20-1/2" X 8-1/4" Model SS-50- 14" X 20-1/2" X 8-1/4"

VERSATILITY OF MULTI PURPOSE USE HEAD

STEREO 4-track stereo is really two 2-track stereo recordings on the same tape width that in the past held only one 2-track stereo recording. By setting the Pointer of Track Selector Control in this position, it is possible to record or play the alternate tracks together. The first stereo recording is made on tracks # 1 and # 3. The second stereo recording is made on tracks # 2 and # 4 by turning the tape over.

1-4 MONAURAL : Monaural recording and playback on Track #1 can be achieved by setting the Pointer of Track Selector Control in this position and another recording and playback on Track #4 is possible by reversing the tape over.

3-2 MONAURAL : Monaural recording and playback on Track #3 can be achieved by setting the Pointer of Track Selector Control in this position and another recording and playback on Track #2 is possible by turning the tape over.