SONY TA-VA8ES

Commentary

An AV amplifier with 24 surround modes such as Dolby Pro Logic.

Equipped with a 5.1 ch input terminal for Dolby digital processor, it can be combined with SDP-EP9ES to build Dolby digital home theater system.
The signal at the 5.1 ch input terminal does not pass through the DSP section but is directly led to the volume section.

It supports Dolby Pro Logic.
The analog input is digitized by the internal A/D converter and processed by the DSP, enabling high-precision decoding. The surround mode is equipped with 24 modes including Dolby Pro Logic, allowing you to enjoy a variety of sound effects.

The power supply section is equipped with a large transformer with a mass exceeding 6 kg.
In the conventional EI core transformer, E-type and I-type magnetic steel sheets are individually laminated and then combined (welded or bonded) to form the core. The transformer used in the TA-VA8ES has a wrap-packed structure in which I-type and E-type magnetic steel sheets are alternately stacked on top of E-type magnetic steel sheets. Although this structure takes time to manufacture, it is advantageous in terms of sound quality. Since there is no fault section in the magnetic path, leakage of magnetic flux is sharply reduced and the influence on the audio circuit is reduced.
The TA-VA8ES electrolytic capacitor used in the power supply is a sound-quality-oriented capacitor manufactured for the TA-VA8ES. The capacity is also matched to the capacity of the transformer, and the total capacity of the amplifier section is 51,600 μ F to provide extra capacity.

An S. T. D. t. D. type power supply circuit that provides almost the same effect as the S. T. D. power supply used in the ES series amplifier.
In this circuit, a diode is inserted into the voltage amplifier stage (A class stage) to prevent reflux. Even if the power amplifier stage (B class stage) consumes a large amount of current instantaneously, the power amplifier stage continues to operate stably.
In addition, the レギューレーター heat sink for the power supply for small signals used in surround circuits is made of either pure copper with high thermal conductivity or copper-plated, depending on the amount of current passing through, to improve voltage stability.

Equipped with a direct path switch.
When this switch is ON, you can enjoy the sound of the input source without surround sound. In this state, tone control and bus boost circuits are also bypassed.
This function can be operated from the remote control.

A parallel push-pull circuit is adopted for the front L/R and center channel of the power stage, and two NPN type and PNP type transistors are used respectively.
To achieve more stable operation, the TA-VA8ES has developed a parallel transistor with two parallel NPN NPN elements and two parallel PNP elements on the same plate, so that the temperature environment and amplification characteristics are matched.
In addition, a large plate is used for mounting the elements, and stability is further enhanced by preventing sudden temperature changes.

The heat sink uses a large extruded aluminum heat sink that is tuned to reduce harmful fin squeal. The heat sink itself is firmly fixed to the chassis body and structurally reduces vibration.
In addition, the power transistor is arranged so that the front L channel and front R channel, which are the most important channels for channel separation, are separated into separate heat sinks to obtain good separation characteristics.

The volume is equipped with 6 series volume using die-cast frame.
In this volume, the mounting part to the chassis, which is usually fixed with screws at the base of the rotating shaft, is fixed with a die-cast frame stopper. This greatly reduces the wobble of the shaft and reduces the turbidity of sound quality caused by vibration at the contact point.

The FB chassis is used for the chassis, and the whole chassis is firmly fixed as one box by the frame (Frame) surrounding the outer circumference and the beam (Beam) passed in front and back. The members are also designed to have different shapes and sizes to change the natural vibration mode and cancel each other's vibration when they are joined with screws.
In addition, the digital calculation section separates the internal beam from the audio circuit to prevent mixing of digital noise.

Equipped with a device name naming function, you can set and change the device name to be displayed on the display (e.g. Video1 → VHS), so that the display can be adjusted according to the system configuration.

Equipped with a background operation function, you can start recording on a tape deck while listening to a CD such as starting recording on a tape deck while listening to a CD.

You can tune up by adjusting various parameters based on your preferred mode. Tuning can be done with the rotary encoder or remote control.

Compatible with 3-1 stereo.
The TA-VA8ES can be used with the 5.1 ch input when a Dolby digital processor or DVD player is not connected. However, the RK-C210 cable (sold separately) is required for connection.

Remote controller with learning function is included.
This remote control can operate not only the amplifier itself but also Sony's AV equipment. If it is an infrared remote control type, it can also operate other manufacturers' equipment by reading remote control signals.

Model Rating

Type	AV amplifier
Maximum Practical Output (EIAJ, 6 Ω)	Front : 120W + 120W Center : 120W Rear : 50W + 50W
Total harmonic distortion factor	0.02% or Less (front, 6 Ω load, at 95W + 95W output)
Frequency characteristic	Line : 10 Hz to 50 kHz + 1-3dB (when direct path is ON)
Signal-to-noise ratio (A network)	Line : 92 dB (when direct path is ON)
Surround Mode	Refer to the surround mode list below
Dolby Pro Logic Input Balance	Auto
Tone control	Front, center and rear independent Bass : ± 10 dB (center frequency 125 to 1.0 kHz) Mid : ± 10 dB (center frequency 435 to 8.0 kHz) Treble : ± 10 dB (center frequency 1.0k to 8.0 kHz) Increment / decrement step : 1 dB
Bus boost	+7dB(70Hz)
Input of video equipment (audio & video)	Line 5
Video equipment (audio & video) output	Route 2
Video monitor output	Route 2
S-image input	Line 5
S Video Output	Route 2
S video monitor output	Route 1
Audio input	Phono MM : 1 system Line : 4 routes 5.1 ch input : 1 system
Audio Out	Rec out : 2 lines Center out : 1 route Rear L/R : 1 system Subwoofer : 1 line Headphone : One system
AC outlet	Power switch interlock : 2 systems
Pwer	100 VAC, 50Hz/60Hz
Power consumption	215W
External dimensions	Width 430x Height 160x Depth 425 mm
Weight	Approx. 14.6 kg
Attachment	Remote Controller with Learning Function RM-P362

　

Surround mode of the TA-VA8ES

Surround Mode

Adjustable parameter

GENRE

MODE

Effect obtained

EQ

Effect Level

Rear Level

Center Level

Room Size

Wall Type

Front Back

Left Right

Delay

Reverb Time

ProLogic

Pro Logic

Dolby Prologic for processed source playback.

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Enhanced

A mode in which surround processing is added to the above pro-logic.

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Movie

Small Theater

Reproducing the sound characteristics of movie theaters.

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Medium Theater

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Large Theater

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Mono Movie

The atmosphere of the movie theater is reproduced from the mono movie source.

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Music1

Small Hall

Acoustic characteristics of a rectangular concert hall are reproduced. Suitable for soft acoustic sound.

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Medium Hall

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Large Hall

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Small Opera House

Reproducing the sound characteristics of the theater. It is suitable for musicals and operas.

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Medium Opera House

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Large Opera House

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Music2

Small Jazz Club

Reproduced the acoustic characteristics of jazz club.

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Large Jazz Club

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Small Church

Reproduction of acoustic characteristics of church.

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Large Church

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Small Live House

Reproducing the acoustic characteristics of a live house.

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Large Live House

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Karaoke

Decreases the vocal level of the stereo source.

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Acoustic

Normal two channel stereo playback (no surround effect)

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Sports

Arena

Recreates the atmosphere of a large concert hall. Suitable for rock music.

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Stadium

Recreates the atmosphere of a large outdoor stadium. Suitable for electric sound.

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Game

Game 1

You can get powerful sound with video game software.

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Game 2

You can get powerful sound with the software of monaural video game.

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Parameters that can be adjusted with TA-VA8ES

Parameter Name	Effect obtained
EQ	Adjusts the front / center / rear sound quality. You can select the slope and the center frequency for each of the low, middle, and high tones.
Effect Level	Adjusts the overall level of the sound field effect.
Rear Level	Adjusts the volume of the rear speaker.
Center Level	Adjusts the volume of the center speaker.
Room Size	Adjusts the interval between early reflections to reproduce the sound you hear in a large or small room.
Wall Type	Simulates the wall materials of a concert hall, such as the soft and hard walls of a suspended curtain.
Front Back/Left Right	Simulates the seating position by adjusting the balance between direct and indirect sound.
Delay	Adjusts the output time from the rear speaker for a wider sound field.
Reverb Time	You can length can be selected in 2 stages.