* Teac A-3340 S *

This 4-channel is far more than the world's most versatile
 quadraphonic tape deck.
Conventional 4-track recorders do not permit overdubbing in sync.
The record and playback head are physically separated,
 which results in a time lag between the signal
 being recorded and the previously recorded signal being monitored.
Consequently, synchronization is impossible.
Each track of the Simul-Sync record head
can be electronically switched to permit monitoring of the
 previous tracks of material as new
 tracks is being recorded.
All tracks will be in perfect sync.
Up to ten individual instruments and voice
 tracks can be recorded at different times,
 with no track going beyond second generation.
You can move from the directional functions 
(play,rewind,fast forward,stop,pause and record)
 with a mere touch of a finger.
All transport controls are positioned for right hand operation.
There is also a unique paus control
 with indicator light which allows 
you to keep the deck in the record mode while 
pausing momentarily - you can then continue 
recording at any given instant without
 those annoying "start-pops" you 
used to hear in other decks.
Separate bias and Eq switches maintain a
 compatible adjustments between the tape decks
 electronics and the different types of tape.
Being able to select the proper bias for 
either high frequency/low distortion or standard tape results in
 four major benefits:
(1) Reduction of background noise
(2)Reduction of tape hiss.
(3)A much improved signal to noise ratio.
(4)Greater clarity and frequency response.
Signals from 8 sourches (4line+4 mic)
 may be recorded simultaneously.
Independent mic and line pre-amps, 
each with it's own level control,
 provide maximum flexibility for creative
 recording and permits input from a combination 
of line/source and mic signals.
Naturally, the 3340S has 7-1/2 speed and 15.
A reel-size selector button automatically 
adjusts the motor torque and holdback tension for the reel used.
An important feature to avoid tape stretch.
Quik-lock reel-holders secure reels 
to the turntable with a twist of the wrist.
The four professional VU-meters is large and easy to read.
A two-channel, four-channel play switch
 lets you enjoy old stereo tapes as well as your new quad tapes.
This model will playback almost
any kind of recorded 1/4 inch tapes:
4-track / 4 channel.
4-track / 2-channel.
4-track / mono.
2-track stereo.
2-track mono and fulltrack.
It can also be used as a
regular 4-track/2channel tape deck.
For that purpose set the Play switch to:
 1+3 Front channels.
Specifications:
Track System: 4-track Multi channel.(with simul-sync switch)
Heads: (3) erase, record and playback.
Reel-size: Up to 10-1/2 with hubadaptors
note: TZ-612 adaptors.
Tape Speed: 7-1/2 and 15.
Motors: (1) dual speed hysteresis sync capstan-motor.
(2) Eddy current induction reel-motors.
Wow and FlutterL0,04% at 15 ips.
0.06% at 7-1/2 ips.
Frequency response: 25-24,000 Hz at 15 ips.
25-22,000 Hz at 7-1/2 ips.
Signal to noise ratio: 55dB.
Harmonic distortion: 1% at 1,000Hz normal operation level.
Stereo channel seperation: 55 dB.
Fast winding time: 140 seconds for 1800 feet.
(4) RCA inputs and (4)outputs.
(4) 1/4 microphone inputs on faceplate.
(2) Headphone jacks for 1+3 and 2+4.
Dimensions: 17-3/8 Wide. 20-1/2 Tall. 8-3/4 Deep.
Weight: 50 lbs.
Beltdriven counter
Beltdriven capstan-axel.
A few accessories for this model:
Mixer Teac 2 and Teac 2-A.
 MB-20 4-channel Meterbridge
Mixdown panel AX-20.
AN-300, 4 channel Dolby-unit.
AX-10, Sound on Sound + stereo echo unit.
E-1 Head demagnetizer.
CS-343 Carrying case for 3340-S.
Note: This model in the pictures 
is the second generation of 3340-S (1973).
 
First model has different transport-control section
with a slide-lever for changing between Play and Fforward/Rewind.
I have following for both models:
Owners Manual.
Service manual.
Parts list.