Search this site

Labels

4-channel ACCUPHASE ACOUSTIC ENERGY ADC ADCOM ADS ADVENT AIFAI AIWA AKAI AKG ALIANTE ALLISON ALTEC LANSING AMPEX AMPLIFON ANCIENT AUDIO AR ARCAM ARISTON ARMONIA AUDIA AUDIO ACADEMY AUDIO ANALOGUE AUDIO DYNAMICS AUDIO INNOVATIONS AUDIO NOTE AUDIO RESEARCH AUDIO-TECHNICA AUDIOLAB AUGUSTA AVALON AVID AXIOM Alchemist Audiostatic B-I-C BASF BASSOCONTINUO BEVERIDGE BEYER-DYNAMIC BOSE BOSTON BOWERS-WILKINS BOZAK BRAUN BRIONVEGA BSR Bang & Olufsen Bell Belt-Drive CAMBRIDGE CANTON CARVER CASTLE CD Player CD Transport CEC CELESTION CEMARK CERWIN-VEGA CHARIO CHARTWELL CIZEK CLARION CONRAD-JOHNSON COPLAND CORAL CORAL ELECTRONIC CREEK CROWN CYBERNET CYRUS California Audio Labs Centrex DAC DAHLQUIST DALI DAT DBX DECIBEL DENON DIAPASON DOKORDER DOMA DUAL DYNACO DYNAUDIO DYNAVECTOR Ditton EISA ELAC ELECTRO-VOICE EMPIRE EMT EPI EPICURE EPOS ES Series ESB ESOTERIC ESS EUMIG Esotec FAIRCHILD FOSTEX GALACTRON GALE GARRARD GENELEC GENESIS GIUSSANI RESEARCH GOLDENOTE GOODMANS GRAAF GRUNDIG H.H. SCOTT HAFLER HARBETH HARMAN/KARDON HEATHKIT HECO HIRTEL HITACHI HPM INDIANA LINE INFINITY JAMO JANSZEN JBL JEFF ROWLAND JENSEN JMLAB JVC KEF KENWOOD KLH KLIPSCH KOSS KRELL KYOCERA LAE LEAK LECTOR LENCO LESA LINN LOWTHER LUXMAN LYNGDORF Lafayette MAGNEPLANAR MARANTZ MARK LEVINSON MARTEL MARTINLOGAN MARUNI MASH MAXELL MBL MERIDIAN MERITON MICRO SEIKI MICRO-ACOUSTICS MIRAGE MISSION MITSUBISHI MONITOR AUDIO MONRIO MORDAUNT-SHORT MUSICAL FIDELITY MYRYAD McIntosh McLAREN NAD NAGRA NAKAMICHI NHT NIKKO NORESCO NOVA ONKYO OPERA OPTONICA ORTOFON PANASONIC PARADIGM PATHOS PEARL PHASE LINEAR PHILIPS PICKERING POLK AUDIO PSB Power-amplifier Pre-amplifier Pre-phono Pro-Ject QUAD RADFORD RCF REK-O-KUT REVOX ROGERS ROKSAN ROTEL ROYD RUARK Reel to Reel SACD SAE SANYO SENNHEISER SHARP SHERWOOD SHURE SIARE SIGNET SME SOMA SONAB SONUS FABER SONY SOTA SPECTRAL STANTON STAX STILE ITALIANO STRUSS SUGDEN SUPERSCOPE Soundcraftsmen Spica Stereo 8 Synthesis TAC TAD TAMON TANDBERG TANNOY TASCAM TDK TDL TEAC TECHNICS THE FISHER THIEL THORENS TOSHIBA TRANSCRIPTOR TRIO ULIX UNISON RESEARCH UREI UTAH Uni-Q VANDERSTEEN VOCE DIVINA VPI WADIA WHARFEDALE XAVIAN YAMAHA ZENITH ZINGALI amplifier cartridge direct-drive headphones idler italian lathe linear loudspeaker pioneer quadraphonic receiver sansui tangential tonearm tuner turntable unitra

What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.




H.H. Scott '59





Akai GX-280D-SS tape deck

4-Head 3-Motor Automatic Reverse Surround Stereo Tape Deck

Akai's GX Head 4-Channel Surround Stereo system eliminates the inability to pick up and reproduce true concert hall sound. Every pitch of sound and reverberation effect is reproduced with all of the exciting "sense of presence" experienced when attending a live concert. Akai's surround stereo supplements conventional stereo's two front speakers with two additional rear speakers to front the "2-2 system". The listener is surrounded by two sets of speakers (left & right front and left & right rear). This arrangement does not mean, however, that simply adding two speakers to a 2-channel stereo system is all that is necessary for 4-channel stereo playback. Four separate recordings are made using four individual channels (four tracks in one direction) of the magnetic recording tape. This 4-channel stereo tape feeds into four pre and main amplifiers to activate a 4-speaker system. Thus, at playback time, sounds from separate channels are emitted from each speaker providing the listener with a feeling that he is listening to concert hall sound from the best seat in the auditorium. Model GX-280D-SS is a compatible 4-channel/2-channel stereo model. For 2-channel stereo operation, only the front channels are utilized. For exciting 4-channel surround stereo, a 4-channel stereo external amplifier or two 2-channel stereo amplifiers can be used to activate a 4-speaker system.

 

GX (Glass & Crystal Ferrite) Head

Akai has equipped this model with its new and amazing Glass & Crystal Ferrite Recording and Playback heads to bring you unequalled open reel high fidelity sound. With the Glass & Crystal Ferrite head, superbly wider frequencies with clear highs can be recorded in all their true fidelity with low noise tape. In other words, with the GX head, a high dynamic range and excellent Signal-to-Noise Ratio are achieved. The secret of this quality head is made of single crystal ferrite and is mounted and set in glass. The superior high range characteristics are contributable to thw structure of the head gap which focused the magnetic field into a sharp oblong radius. This focused field recording system minimizes high frequency loss, eliminating undue equalization and achieving a wider dynamic range.

 


Specifications

Track System:  4-track, 4/2-channel stereo/monaural system

Reel Capacity:  up to 7" reel

Tape Speed:  7-1/2 and 3-3/4 ips (±0,5%)

Wow and Flutter:

At 7-1/2 ips :  less than 0,10% RMS

At 3-3/4 ips :  less than 0,15% RMS

Frequency Response (using Low Noise Tape)

At 7-1/2 ips :  20 Hz to 25,000 Hz (±3 dB)

At 3-3/4 ips :  30 Hz to 20,000 Hz (±3 dB)

Frequency Response (using Regular Tape)

At 7-1/2 ips :  30 Hz to 23,000 Hz (±3 dB)

At 3-3/4 ips :  30 Hz to 19,000 Hz (±3 dB)

Distortion:  less than 0,8% (1,000 Hz, "0" VU)

Signal-to-Noise Ratio:  55 dB

Erase Ratio:  better than 70 dB

Bias Frequency:  110 kHz

Heads :  4 - GX recording and playback, full-track erase, 2-channel erase head

Motors:  3 - One Servo motor for direct capstan drive, two 6-pole outer-rotor motors for supply and take-up reel drive

Fast Forward and Rewind Time:  90 seconds using a 1200 ft tape at 60 Hz

Recording Capacity:

2-channel Stereo : 2 hrs (1,200 ft tape, 3-3/4 ips)

4-channel Stereo : 1 hr (1,200 ft tape, 3-3/4 ips)

Output Jacks

Line :  4x 1,23 V (0 VU)/10 k ; Required load impedance more than 25 k

Phone : 2x 40 mV/8

Input Jacks

Microphone :  4x 0,5 mV/10 k

Line :  4x 0,1 V/150 k

DIN Jack: 2x  0,4 V/60 mV (High) 10 mV (Low)

Semiconductors:  68 Silicon Transistors; 52 Diodes

Power Requirements:  100 V to 240 V 50/60 Hz

Power Consumption:  140 W

Dimensions (W x H x D):  435 x 505 x 250 mm (17,4" x 20,2" x 10")

Weight:  22,4 kg (49,5 lbs)


 

No comments:

Post a Comment