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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





Marantz Imperial 8 speakers


A Marantz Imperial 8 speaker can handle 125 watts of integrated program material, but reproduces full realism with a fraction of that.

The Marantz Imperial 8 speaker system is just one of two exciting Marantz floor-standing speaker models.

The step-up model Imperial 9 wit tow 10" woofers is designed for higher power handling capabilities as well as high efficiency and mirror imaging. Both models reflect the kind of technical expertise and engineering excellence that has made Marantz the choice of professionals world-wide. Stop by your local Marantz dealer and see the complete line of floor-standing and book-shelf speaker systems starting as low as $59,95

 


Specifications

Frequency Response:  40 Hz to 18,000 Hz ±2 dB (30 Hz to 20,000 Hz ±5 dB)

Sensitivity:  97 dB (1 Watt/0,5 meter, 1 kHz)

Power Rating:  75 watts Continuous (125 watts Integrated)

Distortion Under:  0,5% 100 dB SPL at 0,5 Meter Avg. Of 50/500/5,000/12,500 Hz 2nd and 3rd Harmonics

Nominal Impedance:  8 Ω

Dimensions (H x W x D):  27" x 18-3/4" x 14-1/2"

Marantz Imperial 9 speakers

Mirror imaging is a unique Marantz attraction not found elsewhere. It is achieved by placing the mid-range and tweeter array of both speaker systems in a mirrored position (either both inside or outside of the speaker). By doing this, the stereo image and overall dispersion is exactly symmetrical giving you the most precise stereo sound and separation possible. The Imperial 9 and 8 may be used in the vertical or horizontal position. And mirror imaging is made easy, since the Imperial 8 is designed with a rotatable array, and the Imperial 9 is designed symmetrically. Mirror imaging, a sound feature that speaks for itself.

 


Specifications

Frequency Response:  35 Hz to 17,000 Hz ±1,5 dB (30 Hz to 18,000 Hz ±3 dB)

Sensitivity:  97 dB (1 Watt/0,5 meter, 1 kHz)

Power Rating:  100 watts Continuous (150 watts Integrated)

Distortion Under:  0,5% 100 dB SPL at 0,5 Meter Avg. Of 50/500/5,000/12,500 Hz 2nd and 3rd Harmonics

Nominal Impedance:  8 Ω

Dimensions (H x W x D):  30-1/2" x 24" x 18"


 

JBL 905VX loudspeakers

 

Better Sound in the Home

The same qualities that make JBL monitors the choice of studios make JBL Radiance Series loudspeakers a great choice for your home. Radiance offers strong bass, plenty of "presence" and excellent high frequency response.

Radiance loudspeakers are efficient. A receiver with as little as 10 watts per channel will drive any Radiance Series model to comfortable listening levels. Yet Radiance speakers are rugged enough to be used with receivers or amplifiers delivering up to 200 watts per channel , and they can reach the listening levels demanded for studio-quality sound.

We designed each of the transducers specifically for the Radiance Series, using advanced engineering techniques. Enclosure volumes were precisely calculated, and new dividing networks were developed to blend the outputs of the drivers smoothly at the transition frequencies. Because Radiance loudspeakers are ultimately meant to be heard by people rather than test instruments, the final decisions were made by our listening panels.

 

Specifications

Low Frequency:  250 mm ( 10") diameter

Passive Radiator: 250 mm (10") diameter

Midrange Frequency: 130 mm (5") diameter

High Frequency:  75 mm (3") diameter

Crossover Frequency:  600 Hz, 3000 Hz

Nominal Impedance:  4 Ω

Sensitivity:  88 dB (SPL at 1m/1W input)

Recommended Amplifier Power Range:  10 - 150 watts continuous sine wave per channel

Dimensions (H x W x D):  959 x 413 x 324 mm ( 37-3/4" x 1-1/4" x 12-3/4")

Weight Net:  27 kg (59 lb)


 



JBL 902VX loudspeakers

The Heritage of the Recording Studio

Recording professionals demand the best equipment. Their studio monitors must meet the highest standards of accuracy, controlled dispersion, efficiency, and durability. That's why professionals choose JBL.

In 1978, for instance, 35 of the top 50 albums were recorded, mixed, or mastered on JBL loudspeakers, according to a Recording Institute of America survey.

 


Specifications

Low Frequency:  300 mm ( 12") diameter

Passive Radiator: No

Midrange Frequency: 130 mm (5") diameter

High Frequency:  75 mm (3") diameter

Crossover Frequency:  600 Hz, 3000 Hz

Nominal Impedance:  4 Ω

Sensitivity:  88 dB (SPL at 1m/1W input)

Recommended Amplifier Power Range:  10 - 200 watts continuous sine wave per channel

Dimensions (H x W x D):  699 x 434 x 326 mm ( 27-1/2" x 17-1/16" x 12-3/4")

Weight Net:  20,2 kg (44,5 lb)


 

JBL 702VX speakers

Innovative Styling

Radiance Series loudspeakers follow in the JBL tradition of visual as well as acoustical excellence. With the grille on, the speakers present a simple yet elegant appearance that fits harmoniously into any room. With the grille off, the reflective finish of the baffle can be as subtle or spectacular as you want. The enclosure finish is a furniture-grade walnut-grained vinyl that resists stains and spills.

 


Specifications

Low Frequency:  250 mm ( 10") diameter

Passive Radiator: No

Midrange Frequency: 130 mm (5") diameter

High Frequency:  75 mm (3") diameter

Crossover Frequency:  600 Hz, 3000 Hz

Nominal Impedance:  4 Ω

Sensitivity:  88 dB (SPL at 1m/1W input)

Recommended Amplifier Power Range:  10 - 150 watts continuous sine wave per channel

Dimensions (H x W x D):  648 x 404 x 284 mm ( 25-1/2" x 15-7/8" x 11-3/16")

Weight Net:  17,3 kg (38 lb)


 

JBL 502VX speakers

Every step in the design and construction of the JBL Radiance Series, from the initial computer calculations to the final packing, is done at our own Northridge, California headquarters. JBL have complete manufacturing facilities for transducers and furniture, an extensively equipped engineering laboratory, and a complete chemical laboratory. Much of our tooling was designed and built especially by us because none was available that met our specifications.

JBL have more test equipment devoted exclusively to quality control that most speaker companies have in their entire engineering departments. Each finished product must measure up to a laboratory standard by actual test before it can be packed. At JBL we control all the variables, so we don't have to compromise our design goals.

 


Specifications

Low Frequency:  200 mm ( 8") diameter

Passive Radiator: No

Midrange Frequency: No

High Frequency:  75 mm (3") diameter

Crossover Frequency:  2000 Hz

Nominal Impedance:  4 Ω

Sensitivity:  86 dB (SPL at 1m/1W input)

Recommended Amplifier Power Range:  10 - 80 watts continuous sine wave per channel

Dimensions (H x W x D):  546 x 343 x 284 mm ( 22-1/2" x 13-1/2" x 11-3/16")

Weight Net:  12,5 kg (27,5 lb)


 

Sharp RT-2266 cassette deck

Solenoid touch. APLD search. Metal tape compatible, soft, easy and dynamic.

Front-loading stereo cassette deck with Dolby Noise Reduction and featuring the Auto Program Locate Device (APLD), soft-touch solenoid transport and metal tape capability.

 

Exclusive Auto Program Locate Device (APLD) for pushbutton location of any selections forward or backward.

Two-motor drive system reduces Wow and Flutter and assures outstanding speed stability.

Microprocessor solenoid cassette controls for selection of tape transport mode, recording and auto spacing functions.

Metal tape selector switch for optimum performance from metal tapes,

Individual bias and equalization switches assure optimum response from CrO₂/Fe-Cr/Normal tapes

Easy-to-read Sharpscan peak level display with peak hold function for more accurate and reliable recording level adjustments.

Output level control to match the signal from cassettes to other sound sources in your stereo system

PP (Permalloy Plus) record/playback head developed to ensure greater wear resistance and optimum audio performance with metal as well as other tapes

Double-gap ferrite erase head creates a stronger magnetic field for more thorough erasing

Automatic end-of-tape shut-off in any mode to protect tapes

Illuminated indicators show operating mode at a glance

Electronically-controlled DC capstan motor for absolute speed stability and low Wow and Flutter

Auto spacing mechanism for creating non-signal segments between musical selections.

Pause control for instant, non-blurring tape start-up after editing.

Front-panel inputs for stereo headphones and microphones

Individual level controls for Line and Mic mixing.

Digital tape counter for instant tape location reference

Illuminated tape compartment for visual tape checking.

 


Specifications

Number of Tracks: 4-track 2-channell stereo

Recording System:  AC bias (105 kHz)

Erase System:  AC erase (105 kHz)

Tape Speed:  1-7/8 ips (4,8 cm/s)

Wow and Flutter:  0,045% WRMS

Frequency Response:

Normal Tape :  25 - 15,000 Hz (30 - 14,000 Hz ±3 dB)

CrO₂ Tape : 25 - 17,000 Hz (30 - 16,000 Hz ±3 dB)

Fe-CR Tape : 25 - 18,000 Hz (30 - 17,000 Hz ±3 dB)

Metal Tape :  25 - 19,000 Hz (30 - 18,000 Hz ±3 dB)

Signal-to-Noise Ratio (CrO₂ Tape )

Dolby NR Off :  57 dB

Dolby NR On :  67 dB (at over 5 kHz)

Tape: Standard cassette tape

Motor:  Electronically-controlled DC Motor

Heads: 

Record/Playback :  Permalloy Plus

Erase :  Double Gap Ferrite

Input Sensitivity

Microphone :  0,2 mV (-74 dB) / 6,8 k Ω

Line-In :  50 mV (-26 dB) / 70 k Ω

Output Level/Impedance

Line -Out :  500 mV/47 k Ω  (at 0 dB)

Headphone :  63 mV/8 Ω  (at 0 dB)

Power Requirements:  AC 120 V 60 Hz

Power Consumption:  40 W

Dimensions (W x H x D):  430 x 144 x 260 mm (16-15/16" x 5-11/16" x 10-1/4")

Weight:  7,3 kg (16,1 lbs)


 

Sharp RT-1199 cassette deck

Front-loading stereo cassette deck.

The convenience of APLD. The quiet of Dolby NR. The range of metal tape.

Features:

Exclusive Auto Program Locate Device (APLD) with illuminated indicator

Easy-to read Sharpscan peak level display that promises greater accuracy and reliability for more confident recording level adjustments

Metal tape selector switch for optimum performance from metal tapes

Individual bias and equalization switches to optimize performance with CrO₂/Fe-Cr/Normal tapes

PP (Permalloy Plus) record/playback head developed to ensure greater wear resistance and optimum audio performance with metal as well as other tapes

Double-gap ferrite erase head creates a stronger magnetic field for more thorough erasing

Automatic end-of-tape shut-off in any mode to protect tapes

Improved electronically controlled DC motor for absolute speed stability and low Wow and Flutter

Mechanical pause control for instant, non-blurring tape start-up after editing

Individual level controls for Line and Mic mixing

Outputs level control to match the signal from cassettes to other sound sources in your stereo system

Front-panel jacks for stereo headphones and microphones

Illuminated tape compartment for visual tape checking

LED recording and Dolby NR indicators

Digital tape counter for instant tape location reference

 


Specifications

Number of Tracks: 4-track 2-channell stereo

Recording System:  AC bias (105 kHz)

Erase System:  AC erase (105 kHz)

Tape Speed:  1-7/8 ips (4,8 cm/s)

Wow and Flutter:  0,058% WRMS

Frequency Response:

Normal Tape :  30 - 15,000 Hz (40 - 12,500 Hz ±3 dB)

CrO₂ Tape : 30 - 16,000 Hz (40 - 13,000 Hz ±3 dB)

Fe-CR Tape : 30 - 16,000 Hz (40 - 13,000 Hz ±3 dB)

Metal Tape :  30 - 18,000 Hz (40 - 16,000 Hz ±3 dB)

Signal-to-Noise Ratio (CrO₂ Tape )

Dolby NR Off :  57 dB

Dolby NR On :  67 dB (at over 5 kHz)

Tape: Standard cassette tape

Motor:  Electronically-controlled DC Motor

Heads: 

Record/Playback :  Permalloy Plus

Erase :  Double Gap Ferrite

Input Sensitivity

Microphone :  0,2 mV (-74 dB) / 6,8 k Ω

Line-In :  63 mV (-24 dB) / 50 k Ω

Output Level/Impedance

Line -Out :  710 mV/50 k Ω  (at 0 dB)

Headphone :  89 mV/8 Ω  (at 0 dB)

Power Requirements:  Ac 120 V 60 Hz

Power Consumption:  18 W

Dimensions (W x H x D):  430 x 144 x 245 mm (16-15/16" x 5-11/16" x 10-3/8")

Weight:  6 kg (13,2 lbs)


 

Sharp RT-10 cassette deck

Front-loading stereo cassette deck

Metal tape dynamism plus LED peak level display precision

Outstanding features:

Metal tape selector switch for optimum performance from metal tapes

Easy-to-read 10-LED peak level display that assures more accurate and reliable recording level adjustments

Bias and equalization switch to optimize performance with CrO₂/Normal tapes

New hard permalloy head for extended high frequency response

Dolby Noise Reduction cuts tape hiss and improves Signal-to-Noise Ratio by up to 10 dB at over 5 kHz

Automatic end-of-tape shut-off in any mode to protect tapes

Electronically-controlled DC motor for absolute speed stability and low wow and flutter

Line/Mic input selector switch in rear for live recordings or dubbing from records or radio

Mechanical pause control for instant, non-blurring tape star-up after editing

Digital tape counter for instant tape reference

Dolby is a trademark of Dolby Laboratories

 


Specifications

Number of Tracks: 4-track 2-channell stereo

Recording System:  AC bias (105 kHz)

Erase System:  AC erase (105 kHz)

Tape Speed:  1-7/8 ips (4,8 cm/s)

Wow and Flutter:  0,09% WRMS

Frequency Response:

Normal Tape :  30 - 14,000 Hz (40 - 12,000 Hz ±3 dB)

CrO₂ Tape : 30 - 16,000 Hz (40 - 13,000 Hz ±3 dB)

Metal Tape :  30 - 16,000 Hz (40 - 14,000 Hz ±3 dB)

Signal-to-Noise Ratio (CrO₂ Tape )

Dolby NR Off :  52 dB

Dolby NR On :  62 dB (at over 5 kHz)

Tape: Standard cassette tape

Motor:  Electronically-controlled DC Motor

Heads: 

Record/Playback :  New hard permalloy

Erase :  Ferrite

Input Sensitivity

Microphone :  0,2 mV (-74 dB) / 6,8 k Ω

Line-In :  50 mV (-26 dB) / 50 k Ω

Output Level/Impedance

Line -Out :  580 mV/50 k Ω  (at 0 dB)

Headphone :  40 mV/8 Ω  (at 0 dB)

Power Requirements:  Ac 120 V 60 Hz

Power Consumption:  7 W

Dimensions (W x H x D):  390 x 125 x 226 mm (15-3/8" x 5" x 8-7/8")

Weight:  3,2 kg (7 lbs)

Toshiba SR-40E turntable

World's first and smallest IC-IC cartridge

Built-in cartridge energizer/preamplifier

Quiet 4-pole hysteresis synchronous motor

Perfect double floating advanced belt-driven system

Cueing control and auto-return / auto-cut player

 

 


Specifications

Turntable:  300 mm (12") aluminum diecast

Tone arm:  Slim pipe arm with Toshiba standard cartridge socket

Drive Type:  Belt-drive

Motor:  16-pole hysteresis synchronous motor

Speed:  33-⅓ and 45 rpm . Mechanical change-over

Wow and Flutter:  0,1% or less (WRMS)

Tracking Error:  ±1,5°

Cartridge:  IC-IC cartridge, type C-300FA

Stylus:  0,7 mil round, corundum, type N-300C (Ultra C)

Output:  200 mV (5 sec/sec., 1 kHz), 0,5 k Ω 

Output Balance:  ±0,5 dB or less

Compliance:  25 x 10¯⁶ cm/dyne (DC), 8 x 10¯⁶ cm/dyne (100 Hz)

Optimal Stylus Pressure:  1,8 - 2,5g

Frequency Response:  20 - 20,000 Hz

Crosstalk:  25 dB (1 kHz)

Signal-to-Noise Ratio:  45 dB or better

Auxiliary Device:  Auto-return, auto-cut, cueing control, Inside force canceller

Cabinet:  walnut finish, acril resin cover

Power Requirements:  AC 100/120/220/240 V, 50/60 Hz

Dimensions (W x H x D):  480 x 200 x 390 mm (18-1/8" x 7-7/8" x 15-5/16")

Weight:  10 kg (22-1/16 lbs)


 

Toshiba SR-50 turntable

Stereo Record Player

World's first photoelectonic cartridge

Built-in cartridge energizer/preamplifier

6-pole outer rotor brushless servomatic DC motor

Perfect double-floating advanced belt driven system

Photomatic or manual cut player

 

Specifications

Turntable:  300 mm (12") aluminum diecast

Tone arm:  S-shaped pipe arm with EIA standard cartridge socket

Drive Type:  Belt-drive

Motor:  6-pole outer rotor, brushless servomatic DC motor (using 12 transistors and 7 diodes)

Speed:  33-⅓ and 45 rpm . Mechanical change-over

Wow and Flutter:  0,09% or less (WRMS)

Tracking Error:  ±1,5°

Cartridge:  Photoelectronic cartridge, type C-100P

Stylus:  0,3 x 0,8 mil elliptical, solid diamond, type N-100

Output:  200 mV (5 sec/sec., 1 kHz), 5 k Ω 

Output Balance:  ±0,5 dB or less

Compliance:  30 x 10¯⁶ cm/dyne (DC), 10 x 10¯⁶ cm/dyne (100 Hz)

Optimal Stylus Pressure:  1,5 ±0,5g

Frequency Response:  20 - 40,000 Hz

Crosstalk:  32 dB (1 kHz)

Signal-to-Noise Ratio:  55 dB or better

Auxiliary Device:  Photomatic cut,inside force canceller, silicon transistor equalizer amplifier

Cabinet:  Real walnut

Power Requirements:  AC 100/120/220/240 V, 50/60 Hz

Dimensions (W x H x D):  560 x 190 x 390 mm (22" x 7-1/2" x 15-3/8")

Weight:  12 kg (26-1/2 lbs)


 

Toshiba SR-80 turntable

Stereo Record Player

Direct transducer type, world's first electret condenser cartridge, that is oscillator, FM demodulator are unnecessary

Buil-in cartridge energizer/preamplifier

Low revolution 16-pole hysteresis synchronous motor

Perfect doble-floating advanced belt-driven system

Cueing control and auto-return. Auto-cut player.

 


Specifications

Turntable:  310 mm (12-3/8") aluminum diecast

Drive Type:  Belt-drive

Motor:  16-pole hysteresis synchronous motor

Speed:  33-⅓ and 45 rpm . Mechanical change-over

Wow and Flutter:  0,1% or less (WRMS)

Tracking Error:  ±1,5°

Cartridge:  Electret condenser cartridge, type C-402S

Stylus:  0,5 mil round, solid diamond, type N-402SE

Output:  200 mV )5 sec/sec., 1 kHz)

Output Balance:  ±2 dB or less

Compliance:  25 x 10¯⁶ cm/dyne (DC), 8 x 10¯⁶ cm/dyne (100 Hz)

Optimal Stylus Pressure:  2,5 ±0,5g

Frequency Response:  20 - 20,000 Hz

Crosstalk:  25 dB (1 kHz)

Signal-to-Noise Ratio:  50 dB or better

Auxiliary Device:  Auto-return, auto-cut, cueing control

Cabinet:  Real walnut, detachable acril resin cover

Power Requirements:  AC 100/120/220/240 V, 50/60 Hz

Dimensions (W x H x D):  500 x 200 x 400 mm (19-11/16" x 7-7/8" x 15-13/16")

Weight:  8 kg (17-5/8 lbs)