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 TT 15S1

 Analogue purists behold: the TT-15S1 Premium Range turntable is here. It has a solid acrylic resin chassis in design style of the Premium Range, a 3 cm-thick heavy acrylic platter with a black felt cover, solid aluminium feet, and stateof- the-art ceramic bearings, so it almost eliminates chassis resonance. The Marantz exclusive MM-system in a stylish ebony body is directly fixed to the high-grade audio interconnector reducing signal resistance to a minimum. Its anodised arm has been optimised to partner the unit perfectly. The motor is dampened and isolated from the chassis to prevent vibration influence. And a "clever clamp" system ensures excellent disc contact with platter. The magnetic anti-skating system is contact-free to eliminate unwanted stylus stresses, and the continuous silicon belt guarantees rotational accuracy. The TT-15S1 represents the ultimate addition to any audiophile's home audio system.

 Technical Details
Acryl chassis with massive aluminium feet
3cm thick acryl platter
Ceramic bearing
Endless silicon belt
Asynchronous motor without chassis contact
Marantz exclusive MM system in ebony body
Anodised arm optimised to the system
Direct fixed, high grade interconnect of OFC coppr with RCA plugs
Magnetic anti skating system
Fine adjustable counterweight
Clever Clamp
Specifications
Construction:  resonance optimised chassis shape
Drive Unit:  Decoupled synchronous motor in a massive metal-housing
System: Manual Belt Drive
Belt Type:  Silicon
Bearing:  Hardended steel, polished sinter bronze insert with a Ceramic ball
Speed:  33-1/3 and 45 rpm
Speed Variation:  ±0,2%
Platter:  GS-PMMA, acrylic precision CNC machined surface
Stylus Version:  MM - Marantz Virtuoso Ebony
Rated Output:  3 mV/1 kHz
Frequency Range:  20 Hz - 20 kHz
S/N Ratio:  80 dB
Dimensions (W x D x H) 440 x 350 x 110 mm
Weight:  8,9 kg

Colors:  White

Marantz TT 42

 Combining classic turntable design with modern audio technologies, the Marantz TT42 Turntable plays back your vinyl collection with stunning audio quality. This turntable features a fully automatic mechanism that plays records with a touch of a button. A low-coloration tone arm, DC servo motor, and belt drive ensure pristine, interference-free playback.

Marantz TT42 Turntable
At a Glance:
Fully automatic mechanism plays records with the push of a button
Low-coloration tone arm and matched magnet cartridge reduce distortion
DC servo belt drive eliminates hiccups during playback
Three-year warranty
 Vinyl Record Playing with Modern Convenience
Have you noticed the resurgence of vinyl record sales in recent years? Fueled by the fact that many treasured albums have not been issued in digital format, and with newer artists continuing to release music on vinyl, turntables are popping up in living rooms all over the world.
The Marantz TT42 Turntable combines old school record playing with convenient, high-performance features. The turntable is fully automatic: with a push of the "play" button, the tone arm precisely lifts itself onto the record groove, saving you the trouble of having to manually position the stylus. Once playback has concluded, the tone arm safely returns to its resting position without scuffing your record.

A Quality Mechanism for High-Fidelity Playback
The TT42 turntable is outfitted with a low-coloration tone arm that resists resonance for a clear, balanced sound. A high quality, moving magnet cartridge is preset at the factory for proper tracking and smooth response. In addition, the turntable's DC servo belt drive keeps the motor running at a constant speed for optimum performance. The TT42 is designed to produce a stunning, nuanced, and distortion-free audio performance.
 A version of the TT42 with a phono preamp, the TT42P, which features built-in phono input circuitry, is also available to accommodate multi-channel receivers that lack a proper phono input.
The Marantz TT42 Turntable comes complete with a clear plastic dust cover and is backed by a three-year limited warranty, subject to the full warranty terms and conditions.
Specifications
System: Automatic Belt Drive
Belt Type:  Rubber
Platter:  304 mm ø
Tonearm:  Distortion-free aluminium tubular
Effective Tonearm Length:  211 mm
Offset Angle:  26°
Overhang:  19,5 mm
Tangential Tracking Error:  0,15°/cm Rad.
Bearing Type:  Metal
Motor:  D.C. Motor (electronic -controlled)
Speed:  33-1/3 and 45 rpm
Signal-to-Noise Ratio: 
Unweighted:  42 dB
Weighted :  65 dB
Wow and Flutter:  ±0,10 / 0,07%
Rated Output:  4 mV/1 kHz
Total Capacitance Tonearm and Cables:  ca. 150 pF
Frequency Range:  20 Hz - 18 kHz
Compliance:
Horizontal : 16 µm/mN
 Vertical : 18 µm/mN
Cartridge:  AT 3600
Stylus :  Diamond conical 15µm O
Cartridge Weight:  4,5 g
Tracking Force:  25 mN (22,5 - 27,5 mN)
Power:  230 V or 115 V 50/60 Hz
Power Requirement:  1,5 W
Dimensions (W x D x H) 420 x 360 x 137 mm
Weight:  5,4 kg

Colors:  Black

Marantz Model 5

 The Power Amplifier Model 5 it is  a revised and more attractive version of the Model 2
Marantz Power Amplifier have been designed and constructed to give a long, trouble-free life of fine listening quality. Here is the type of performance and workmanship that previously was found only in high quality broadcast or laboratory equipment. Built-in metered test instruments permit simple, accurate adjustments for optimum performance.
 The Model 5  is essentially a smaller version of the 40 Watt Model 2, with certain minor simplifications, never theless embodying fully the same quality.
Its exterior design adapts itself to instalation requirements for multiple amplifier systems such as in stereophonic applications and in those embodying the Marantz Electronic Crossover.

Specifications
Power Output:  30 Watts (60 Watts peak) "Ultra-Linear" operation.
18 Watts of excellent Triode operation can be had by altering two connections inside chassis.
Output Connections:  4, 8 and 16 ohms
Input Sensitivity (for 30 watts):  1,3 volts RMS into 250 kohm
Response:
At 30 Watts : Within 0,2 dB from 20 cps to 20 kc 9equivalent of ±0,1 dB from 15 cps to 40 kc into "Grid" (or test) input.
At ½ Watt : ±1 dB from 3 cps to 40 kc. Response has been deliberately rolled off approx. 7 dB at 100 kc to control transient response.
Subsonic Filter in standard "Input" slowly rolls response off below 20 cps (less than 1 dB at 20 cps, -10 dB at 3 cps, etc)
Distortion at 30 Watts
Total Harmonic Distortion :  less than 0,1% at mid-frequencies. Less than 0,5% from 20 cps to 10 kc. Less than 1,0% at 20 kc with resistive load (much less of equivalent voltages with inductive speaker loads).
Intermodulation Distortion :  less than 0,5% (60 cps/12 kc, 4:1)
IM measurement of typical amplifier: 35 W equivalent  0,5%;  30 W equiv.  0,28%;  20 W equiv.  0,17%; 10 W equiv.  0,11%
Distortion below 30 W is largely of 2nd order and reduces rapidly with signal level
Damping Factors:
Greater than 20 from 20 cps to 20 kc (instructions given for optional insertion by the customer of two additional resistors to provide damping factors of 2, 1, or ½)
Inverse Feedback and Stability:
20 dB of overall feedback. Great care has been taken to ensure stability and low distortion under widely varying loods, both resistive and reactive, such as are encountered in loudspeaker systems.  Power supply surges are balanced out of signal channels providing excellent recovery from strong transients. Will not oscillate under any condition of open circuit capocitive load.
Hum:
Beter than 90 dB below 30 Watts containing proportion ately little of high order components.
Metered test and Adjustments:
Built-in meter and test switch provide acurate adjustment of each output tube bias. This makes the use of matched tubes unnecessary. Adjustable A.C.  Balance (located subchassis) pre-set at factory
Power Supply:
The use of a transmitting type oil condenser, choke, telephone quality electrolytic, and GZ-34 heater-cathode rectifier provide protection from starting surge voltages, improved regulation, and thorough filtering, together with long life.
Power Requirements:
Design center 117 volts, 60 cycles. Range 105 -125 volts. 100 watts at zero signal; 130 Watts at maximum signal
Tube Complements:
1 x 6BH6;  1 X 6CG7;  2 X EL34/6CA7;  1 X GZ34
Dimensions (W x H x D):  6" x 7 " x 15 ¼"

Weight:  35 lbs (shipping with grille)

Marantz Imperial I & II

 Imperial I features:
The Imperial I is an elegant piece of furniture as well as an unmatched stereo component. It is meticulously crafted in walnut with a hand-rubbed french-Lacquer finish. Even the decorator-designed grille fabric is a rich complement to the warmth and solidity of the specially selected walnut.

Imperial II features:
The Imperial II is the quintessence of the cabinet marker's art., a paragon in the rich solidity of the finest hardwwods. Just as its sound earns a place in an incomparable Marantz system, so does its beauty and craftsmanship rank it with decorative elegance. Antique distressed finish frames the excitement of a hand-carved wood grille.
 The Imperial I and Imperial II Speaker Systems.
Before Marantz undertakes to create any high-fidelity component, we must take into consideration a most awesome responsibility; the product must be the finest in the world. That is the tradition of Marantz. Thus we did non step lightly into our task of designing speakers worthy of bearing the Marantz name. The Imperial speakers represent the culmination of a long, hard look at the state of the art. By Marantz audio and acoustical engineers and master interior and furniture designers. Just as important were the professional musicans, thoroughly knowledgeable in the audio field, who inspired, guided, and approved every phase of the creation of this masterpiece. The result - in keeping with the Marantz tradition - is as perfect a speaker system as modern technology will allow. 
Available in two enclosure styles, the Imperial features a three-way design incorporating five speakers: a 12" Quadlinear woofer, a pair of mid-range drivers, and a pair of high-frequency reproducers. The unique Quadlinear woofer has an exclusive fou-magnet design for critical control of  flux distribution in the voice-coil gap. The result is absolutely linear travel of the voice coil, ensuring unmatched transient response and eliminating speaker deterioration. Separate "brilliance" and "presence" controls are built in for acoustical balancing. Hear and compare the marantz Imperial with speaker costing twice as much.  Your ears will convince you that Marantz  long-awaited entry into the speaker field was worth waiting for. 
Specifications  Imperial ( I and II)
System:  3-way, 5-speaker
Frequency range:  40 Hz to 20 kHz
Power Handling:  40 watts
Impedance: 8 Ω
Crossover Frequencies:  700 Hz and 6 kHz
Dimensions (W x H x D):  22" x 26" x 15"

Costs:  $299 for Imperial I and $369 for Imperial II

Marantz Model 2

 The Marantz Power  Amplifier has been designed and constructed to give a long, trouble-free life of line listening quality. Here is the type of performance and workmanship that previously was found only in high quality Broadcast or Laboratory equipment. A built-in metered test instrument permits simple, accurate adjustments for optimum performance.
 "The Model 2 power amplifier followed in 1956. largely completed by Sidney Smith, it was a very successful tube design using EL34's in ''ultra-linear'' (push-pull) configuration.
… some sources cite the Model 2 as the beginning of Smith's exclusive concentration on power amplifiers while Saul focoused his attention on preamplifiers,…" (from Marantz History)

 40 Watt / 20 Watt Switch
This unit has been designed primarily as a 40 watt ultralinear amplifier. Speaker systems of a lower power rating could easily be damaged by unwanted pulses coming through at full power. To protect these systems we have incorporated a switch which changes the output connections to Triode operation limiting the power output to 22 or 23 Watts. This control, located near the output terminal strip, is marked '40 Watt UL' and '20 Watt TRI'.
 Input Connections
There is a choice of three input connections to the Marantz Power amplifier.
Pre-Amp: This input is recommended for most preamplifiers. At this connection a 2 volt signal will drive the amplifier to it's full output. A subsonic filter rolls off frequencies below 20 cycles so as to supress speaker "breathing" and other subsonic disturbances.
High Gain, Filtered: For preamplifiers that have a low output voltage capability. Also may be used where loudspeaker has very low efficiency. A signal of 0,7 volts is required here for full 40 watt output. Subsonic filtering is also in effect.
High Gain, Unfiltred: Same as above in sensitivity but without the subsonic filter, response being maintained to below 2 cycles. This input is direct to the input grid and is used in testing frequency response or for special applications where subsonic response is needed.
 Output Connections
When not using Variable Damping:
Use "Ground Return" (center terminal) on loud speaker output terminal strip together with impedance tap on right which matches speaker.
Variable Damping control must be switched off for proper operation.
To use Variable Damping:
Instead of usual ground return, connect to corresponding "Variable Damping Return".
Turn "variable Damping" control on and adjust to desired damping factor.
Specifications
Power Output:  40 Watts ( 80 Watts peak). "Ultra-Linear" operation.
20 Watt Triode Operation. Switch changes output connections to protect speaker of low-power rating.
Output Connections:  4, 8 and 16 Ω from Ground Return. 4, 8 and 16 Ω Variable Damping returns.
Input Sensitivity for 40 Watts:
Two High Gains Inputs:  0,7 V RMS into 105 k Ω
Pream Input: 2 V RMS into 285 k Ω
Response (has been deliberately rolled off approx. 5 dB at 100 kHz to control transient response):
At 40 Watts : Within 0,1 dB from 20 Hz - 20 kHz, within  1 dB from 15 Hz - 45 kHz
At ½ Watt : ±1 dB from 2 Hz - 50 kHz
Subsonic Filter: In Preamp and High-Gain Filtered inputs, response is slowly rolled off below 20 Hz (less than 1 dB at 20 Hz, 10 dB at 3 Hz; etc)
Distortion
Total Harmonic Distortion at 40 Watts: 
less than 0,1% at mid-frequencies;
less than 0,5% from 20 Hz to 10 kHz;
less than 1,5% at 20 kHz with resistive load  (for less at equivalent voltages with inductive speaker loads)
Intermodulation Distortion at 40 Watts (equvalent 80 watt peak):  Less than 0,5% (60 Hz /12 kHz  4:1
Distortion below 30 Watts is largely of 2ad order and reduces rapidly with signal level.
Damping Factors
Greater than 20 from 20 Hz to 20 kHz (without Variable Damping connections)
Continuously Variable from 5 to ½ with Variable Damping connections
Inverse Feedback and Stability
23 ½ dB of overall feddback (20 dB in triode position). Great care has been taken to ensure stability and low distortion under widely varying loads, both resistive and reactive, such as are encountered in loudspeaker systems. Power supply surges are balanced out of signal channels providing excellent recovery from strong transients. Will not oscillate under any condition of open circuit capactive load.
Hum
Better than 90 dB below 40 Watts (containing proportionately little of high order components)
Meterd Tests and Adjustments
Bias, D.C. Balance, A.C. Balance (drive).All accurately adjustable with built-in D'Arsonval meter and test switch
Power Supply
The use of a transmitting-type oil input condenser, choke, telephone quality electrolytic and the new type 6AU4-GTA as heater-cathode rectifiers provide, protection from starting surge voltages, improved regulation and thorough filtering
Power Requirements
Design center; 117 volts, 60 Hz. Range 105 -125 volts. 150 Watts at Zero signal, 200 Watts at maximum signal
Tube Complement
1 x 12AX7 / ECC83
1 X 6CG7
2 X 6CA7 / EL34
2 X 6AU4GTA

Size and Shipping Weight:  15" x 9½" x 6½" / 47 lbs

Marantz Model 3

 Marantz Electronic Crossover
A considerable improvement in clarity and smoothness of reproduction is obtained when a loudspeaker is connected directly to the amplifier terminals without intervening reactive networks. Th elow internal impedance of the amplifier then tends to dampen spurious speaker resonances. In multi-speaker system it would be necessary to accomplish the crossover at an earlier stage in order to supply separate amplifiers with the frequency range required for each speaker. The Marantz Electronic Crossover was designed for this purpose.
 This new unit embodies typical Marantz quality features. Careful engineering and high grade construction meke this one of the finest instruments of the finest instruments of its type (terminal board wiring, low-noise deposited carbon resistors, precision components, etc.) A basic two-channel unit, it can be cascaded for multi-speaker systems.


12 crossover points at ½ octave intervals. Adjustable from 100 cps to 7000cps. Separate switch and a balance control for each channel.
12 dB per octave rolloffs with -3dB (non-ringing) "knees". 12 dB down one octave beyond crossover.
Self-powered by remote supply. All 3 dual triode tubes provided with filtered DC on filaments for elimination of Hum problems.
IM Distortion:  2 volts equivalent RMS; less than 0,1%.  15 volts equivalent RMS; less than 1%
Noise:  better than -90 dB below 2 V output
10 dB gain available with balance controls at max.  Normal (Zero dB gain) position indicated.
Cathode follower outputs.

Optional: Dual or Single cabinet in mahogony, walnut or blonde wood.

Marantz 2015

 Marantz Model 2015 AM/FM Stereo Receiver
The newest addition to the Marantz line of stereophonic receivers is the compact Model 2015. here's proof that marantz can make a comparably priced receiver without compromising traditional marantz styling and quality. The Model 2015 is a full 30 Watts continuous power into 8 Ω speakers, from 40 Hz to 20 kHz, with THD and Intermodulation less than 0,9%.
 This system combines all Marantz high-performance features into a smaller body, sized to fit any shelf or  table. Complete with tape, phono and auxiliary inputs as well as quick-connect output terminals fro main and remote speakers.  This precision-constructed unit also offers Gyro-Touch tuning for accurate reception; plus FM muting pushswitch, which eliminates inter-station noise when tuning. With built-in ferrite AM antenna and advanced soild-state circuitry throughout, the Model 2015 is the finest stereo receiver in this price range.

Specifications
AM/FM Tuner
FM Quieting Slope
RF Input for 30 dB Quieting:  2,8µV
Quieting at 5µV RF Input:  42 dB
Quieting ar 10µV RF Input:  49 dB
Quieting at 50µV RF Input:  55 dB
Total Harmonic Distortion
Mono : 0,6%
Stereo : 1,0%
Selectivity -Alternate Carrier:  48 dB
Capture Ratio:  3,0 dB
Stereo Separation at 1 kHz:  32 dB
Spurious rejection:  45 dB
Image Rejection:  35 dB
IF Rejection:  40 dB
AM Suppression:  30 dB
AM Sensitivity:  25µV
Pre-Amplifier Section
Phono Section
Dynamic Range (ratio of Input Overload Voltage to Equivalent Noise):  93 dB
Equivalent Noise Input:  2,2µV
Sensitivity and Impedance:  2,1 mV/35 k Ω
High level Input Sensitivity/Impedance:  150 mV/100 k Ω
Tone Controls:
Bass at 50 Hz : ±12 dB
Treble at 15 kHz : ±12 dB
Power Amplifier Section
Power Output (Continuous Power at 8 Ω at or below Rated Distortion, 20 Hz -20 kHz, both Channel Driven):  30 watts;  15 watts per channel
IM Distortion (at or below Rated Power, any combination of Two Frequencies):  0,9%
THD (at or below Rated Power, any Frequency from 20 Hz - 20 kHz):  0,9%
Frequency Response (High level Input from 20 Hz - 20 kHz):  1,0 dB
Power bandwidth (IHF, both channel driven):  20 Hz - 22 kHz
Input Sensitivity /Impedance:
Damping Factor:  40
Power Requirements:  110 - 120 V, 220 - 240 V, 50/60 Hz
Dimensions (W x H x D): 360 x 120 x 280 mm  [14¼" x 4¾" x 12"]
Weight:  8,2 kg  [23 lbs]

Optional:  Walnut cabinet WC - 10

Marantz 2010

 Marantz Model 2010 AM/FM Stereo Receiver
The newest addition to the Marantz line of stereophonic receivers is the compact Model 2010. Here's proof that marantz can make a comparably priced receiver without compromising traditional marantz styling and quality. The Model 2010 is a full 20 Watts continuous power into 8 Ω speakers, from 40 Hz to 20 kHz, with THD and Intermodulation under 1,0%. This system combines all Marantz high-performance features into a smaller body, sized to fit any shelf or  table. Complete with tape, phono and auxiliary inputs as well as quick-connect output terminals fro main and remote speakers.  This precision-constructed unit also offers Gyro-Touch tuning for accurate reception; plus FM muting pushswitch, which eliminates inter-station noise when tuning. With built-in ferrite AM antenna and advanced soild-state circuitry throughout, the Model 2010 is the finest piece of stereophonic equipment in this price range.
Specifications 2010
Tuning range: FM, MW
Power Output Continuous Rated (per channel, both channels operating simultaneously):
10 Watts at 4 and 8Ω;
8 Watts at 16 Ω
Comparable Total Music Power (IHF):  300 Watts at 8 Ω
High Level Hum and Noise (ref. 10 Watts at 8 Ω):  -79 dB
Phono Hum and Noise:  1,5µV equivalent Input
Dynamic Range (Phono input to Tape Rec output):  96 dB
IM Distortion SMPTE at rated power:  1,0% (distortion decreases as output is lowered)
Total Harmonic Distortion at rated power: 1,0% max. (distortion decreases as output is lowered)
Power Bandwidth IHF for 1% THD:  15 Hz to 50,000 hz
Frequency Response:
Through  Phono : 1,0 dB
Damping Factor:  Greater than 45
Input Sensitivity/Impedance:
Phono :  2.2 mV (MM) / 47 k Ω
High-level : 150 mV (line) / 100 k Ω
Signal-to-Noise Ratio: 79 dB (line)
Channel Separation:  35 dB (minimum)
Speaker load impedance: 4 to 16
FM Section
IHF Usable Sensitivity:  3,0 µV
Selectivity:  50 dB
Noise Quieting:  -60 dB at 1,000 µV
THD, 400 Hz, 100% Mod: 
Mono : 0,2%
Stereo : 0,5%
Frequency Response (ref. 75µ sec. De-emphasis): ± 1 dB 50 Hz to 15 kHz
Stereo Separation:  1,000 Hz  40 dB
Sub Carrier (38 kHz) Suppression:  60 dB
Power Requirements:  120 V AC 50 to 60 Hz
Power Consumption
At rated output , both channel operating : 95 Watts
Idling Power  (volume control at Zero) : 20 Watts
Dimensions: 14-11/64 x 4-23/32 x 11-1/32 inches

Weight: 17.6lbs

Marantz Model 15 (Fifteen)

 The Marantz Model 15 Solid State Stereo Power Amplifier is an instrument without precedend in performance and rugged reliability. As renowned audio authority Julian Hirsch exclaimed, "if any amplifier can be termed ''indestructible''. This is the one." two independant and identical monophonic amplifiers, each with its own power supply, are bracked together and mounted to a handsome gold anodized front panel that matches both the Model 7T preamplifier and Model 10B tuner. Because the channels are completely isolated, you suffer no power loss, "cross-talk', or other interactions that oftentimes occur from simultaneous operation of both channels with only one power supply. The amplifiers are direct-coupled, providing instantaneous recovery from overload and full rated power throughout the full frequency range. At any audio frequency, and on any output impedance from 4 to 16 ohms, the Model 15 is lower than on any other currently available power amplifier. You can use the Model 15 with any loudspeaker on the market, from  a 4 Ω acoustic suspension system to the 16 Ω electrostatic. And, a built-in fool-proof protection circuit gives instantaneous and unobtrusive protection without causing annoying program interruptions.
 All of these features combine to bring you completely reliable operation - year in and year out. The performance of the marantz Model 15 establishes wholly new standards of technical excellence for amplifiers of all types.
 Safety Circuit - A new, current-limiting circuit developed by Marantz protects both output and driver transistors from output short circuits, open circuits, capacitive loads or any type of complex reactive loudspeaker loading. Accidental open - or short-circuiting, even with full-power, 20,000 Hz output is completely safe. Short circuits during operation activate a visual indicator. This unique safety circuit gives instantaneous and unobtrusive protection without causing annoying program interruptions.

Overload Recovery - Instantanous. Clean performance at high peak-clipping levels.

Time Delay Circuit - Loudspeakers are protected agains damage from turn-on "pops" and surges.

 Separate Power Supplies - Channels are completely isolated. No power loss or other interactions from simultaneous operation of both channels.

Crossover Notch - These sharp switching discontinuities have been virtually eliminated in the Maantz Circuit, even at 20,000 Hz. This results in noticeably cleaner performance, especially apparent at normal listening levels.

Front Panel - Matches those of Marantz Model 7T Solid-State Stereo preamplifier Console and Model 10B Stereo FM Tuner in both size and type of finish.
Cabinet or rack mouting available at extra cost

Electronic Time Delay Circuit -  This mutes the signalto the loudspeaker for about five seconds after the unit is turned on, thus elminating the irksome popping noise normally produced at that time by high power supply transistorized units.
Specifications
Power Output Each Channel (Will operate continually at full rated power from 20 to 20,000 Hz with complete safety):
70 Watts at 4 ohms
60 watts at 8 ohms
40 watts at 16 ohms
Frequency Response:    10 to 60,000 Hz (within 1 dB)
Damping Factor:  Greater than 30 with 8 Ω load.
Total Harmonic Distortion:  less than 0,1% at and below rated power, 20 to 20,000 Hz
Typical Harmonic Distortion:  0,03% with 8 Ω or higher load - at full rated output,any frequency from 20 to20,000 Hz. Distortion decreases as output level is lowered.
Total Noise:  better than 90 dB below 60 watts into 8 Ω
Optional Accessories: Oiled walnut cabinet and rack Mount panel
Power Requirenets:  105 - 130 V AC, for 50-60 Hz. Easily covertible form 110 volt to 220 volt operations.
Dimensions (W x H x D):  376 x 150 x 216 mm (14,8" x 5,9" x 8,5")

Weight:  13,6 kg (29,9 lb )

Marantz Model 14 (Fourteen)

 The Marantz Model 14 is the Single Channel Amplifier
If you need a high-quality amplifier for monophonic or  center-channel operation, then the Model 14 is the ideal choice. Available in utility form, it has the same performance specifications and circuitry of each channel of the Model 15.

Specifications
Power Output Each Channel:  
70 Watts at 4 ohms
60 watts at 8 ohms
40 watts at 16 ohms
Frequency Response:  Within 1 dB,  10 to 60,000 Hz
Damping Factor:  Greater than 30 with 8 Ω load.
Total Harmonic Distortion:  less than 0,1% at and below rated power, 20 to 20,000 Hz
Typical Harmonic Distortion:  0,03% with 8Ω or higher load - at full rated output,any frequency from 20 to 20,000 Hz. Distortion decreases as output level is lowered.
Total Noise:  better than 90 dB below 60 watts into 8 ohms.
Power Requirenets:  105 - 130 V AC, for 50-60 Hz. Easily covertible form 110 volt to 220 volt operations.

Marantz 1030

 The little giant. Little refer to price. Giant refers to quality. Because while the Model 1030 is the least expensive console amplifier Marantz makes - it's still assembled with all the same precision craftsmanship and meticulous construction as the costlier units. It's not quiet as powerful nor does it have as many features.So, what we're really saying is you're not paying extra for extras you don't need. What you do get is 30 Watts or more continuouss power with less than 0,5% distortion. There's a tape monitoring facility and front panel microphone input. The main and remote speakers have convenient quick-connect terminals. Plus, stepped tone controls for easily repeatable settings. The Model 1030 - Thank Marantz for small favors.
Specifications

Gain-Phono (low level) to pre-amp output:  54 dB
Phono to recording output:  37 dB
High level to pre-amp output:  17 dB
Input Impedance (Low level input):
Phono : 47 k Ω
Microphone : 47 k Ω
High level Input:  100 k Ω
Phono Input Sensitivity (Low):  2.1 mV to equal 1 Volt output at pre-amp out
Rgequency Response:  20 Hz to 20 kHz ±1 dB at rated output
Intermodulation Distortion:  less than 0,5% at rated power output from 40 Hz to 20 kHz with both channel driven (SMPTE)
Total Harmonic Distortion:  Less than 0,5% at rated power output from 40 Hz to 20 kHz with both channel driven
Damping Factor (20 Hz to 20 kHz):  Greater than 45 into 8 Ω load
Total Noise (From magnetic phono input to power amp output):  Less than 1,5 µV equivalent input at rated output into 8 Ω
Volume Tracking:  Within 3 dB
Comparable Total Music Power (IHF):  45 Watts at 8 Ω
Rated Continuous (RMS) Output (per channel, both channels operating simultaneously): 
15 Watts at 4 and 8 Ω
10 Watts at 16 Ω
Power Requirement:  AC 100/120/200/220/240 V, 50/60 Hz
At Rated output both channels operating:  110 Watts
Idling Power (volume control at zero):  29 Watts
Dimensions (W x H x D):  14-11/64 x 4-23/32 x 11-1/32 inches

Weight:  16,5 lbs net

Marantz Model 5030

 Model 5030
Top of the new Marantz front-load line. It's designed for those who tale recording seriously. Examples of features:
3-Head System
Permits instant comparison of the recording being made with the input source. Separate record and playback heads in one housing eliminates critical azimuth adjustments and assures precise track alignment.
Full-Process Dolby.
One Dolby system for record, another for playback, allows you to record in Dolby and monitor the decoded playback signal during record.
DC Servo Transport.
Assures accurate tape speed. Wow and flutter remains below 0,08% (WRMS), providing precise speed for record and playback.
Three-Button Tape EQ and Bias.
A simple system designed so that each pushbutton sets both bias and EQ-one button for standard ferric-oxide, one for chromium dioxide (CrO₂) and one for ferri-chrome (FeCr) tape.
Mic/Line Mixing with Master Gain Control.
Enables you to record two sources simultaneously by mixing line and microphone inputs. The master level control assures uniform record level for all inputs.
Other features include:
Three-digit tape counter with memory function
Fast response LED peak indicators.
Specifications 5030
Tape Speed:  1 ips (4,76 cm/s)
Wow and Flutter:  0,08% (WRMS)
Frequency Response (overall; ref. level  -20 below 0 VU):
FeCr : 35 Hz - 16 kHz  ±3 dB
CrO₂ : 40 Hz - 15 kHz  ±3 dB
Normal : 40 Hz - 13,5 kHz  ±3 dB
Signal-to-Noise Ratio:
Playback : 54 dB
Overall, Dolby Off : 52 dB
Overall, Dolby On : 60 dB
Mic Input Impedance:  Low
Sensitivity: -72 dBV
Overall level:  25 dBV
Dimensions (W x H x D):  440 x 146 x 290 mm (17 x 5 ¾ x 11 ½ inch)
Optional:
Walnut wood veneer cabinet

Carrying Handle adaptors RHA-2

Marantz Model 5025

 Model 5025
The middle Marantz is ideal for those who do not need the added versatility of three heads and full-process Dolby, but just want exceptional sound quality of the Model  5030. You get essentially the same performance, and nearly all the same features, as the higher-priced Marantz. There's the DC servo transport to help keep wow and flutter below 0,08%, EQ and bias selection, built-in Dolby that helps produce a signal-to-noise ratio of up to 60 dB. Plus mic/line mixing, master gain control, memory tape counter, peak indicators and standard Marantz features
Specifications 5025
Tape Speed:  1 ips (4,76 cm/s)
Wow and Flutter:  0,08% (WRMS)
Frequency Response (overall; ref. level  -20 below 0 VU):
FeCr : 35 Hz - 16 kHz  ±3 dB
CrO₂ : 40 Hz - 15 kHz  ±3 dB
Normal : 40 Hz - 13,5 kHz  ±3 dB
Signal-to-Noise Ratio:
Playback : 54 dB
Overall, Dolby Off : 52 dB
Overall, Dolby On : 60 dB
Mic Input Impedance:  Low
Sensitivity: -72 dBV
Overall level:  25 dBV
Dimensions (W x H x D):  440 x 146 x 290 mm (17 x 5 ¾ x 11 ½ inch)
Weight:  6,7 kg
Optional:
Walnut wood veneer cabinet

Carrying Handle adaptors RHA-2

Marantz Model 5010

Model 5010
The least expensive Marantz cassette deck… but still very much a Marantz. And that means the 5010 gives you the same painstaking craftsmanship and engineering standard that characterize every Marantz audio product.
Built-in  is an impressive number of the design, super-hard permalloy head, professional VU meters. All ten features described in detail at the left are identical with those in the Marantz 5030 and 5025. And a DC motor system ensures extremely steady tape speed, helping keep wow and flutter low.

Inside and out, 5010 is every inch a Marantz. Even so, we've managed to keep the price down to what you might expect to pay for an ordinary cassette deck.
Specifications 5010

Tape Speed:  1 ips (4,76 cm/s)
Wow and Flutter:  0,1% (WRMS)
Frequency Response (overall; ref. level  -20 below 0 VU):
FeCr : 35 Hz - 15 kHz  ±3 dB
CrO₂ : 40 Hz - 14 kHz  ±3 dB
Normal : 40 Hz - 13 kHz  ±3 dB
Signal-to-Noise Ratio:
Playback : 52 dB
Overall, Dolby Off : 50 dB
Overall, Dolby On : 58 dB
Mic Input Impedance:  Low
Sensitivity: -72 dBV
Overall level:  25 dBV
Dimensions (W x H x D):  440 x 146 x 290 mm (17 x 5 ¾ x 11 ½ inch)
Weight:  6,7 kg
Optional:
Walnut wood veneer cabinet
Carrying Handle adaptors RHA-2