SONY TA-AV870D

Commentary

An AV amplifier equipped with Dolby Pro Logic and DSP with ES technology.

In addition to the digital signal processing of the delay and decoder circuits, the auto-input balance and test tone circuits are also processed by digital signals.

The power amplifier section contains a 5-ch power amplifier.
Especially, the front and center power amplifiers are all discrete components.

ES Technology S. T. D. power supply (Spontaneous Twin Drive) is used for the power supply circuit. In this power supply circuit, the rectifying circuit to the power amplifier section is separated into the A-class stage and the power stage. Interference between the A-class stage and the power stage is suppressed to improve sound quality.

The reverb, dynamics and multi-channel equalizer use digital processing with DSPs.
Equalization is Bass, Mid mid / Treble, the dynamics control is a 9-step compressor / expander control, and the reverbation control is a 6-item main parameter control and a 2-item subparameter control.

There are 10 surround modes, and the theater mode and live concert mode are performed by DSP and Dolby ProLogic Decoder to realize sound fields in movie theaters and concert halls

The A/D converter uses a High Density Linear Converter System.
The D/A converter uses an advanced pulse D/A converter for front / center / rear.

The center channel uses a dual-center system that connects two speakers.

The input / output terminals are equipped with 7 input / output systems for S-Video in addition to 7 input / output systems and Route 3 for Video, 7 input / output systems for S-Video, 2 input / output systems for Audio, 2 input / output systems for Audio, 2 optical systems and 1 coaxial system for Digital. Line 5
In addition, it has a center output and a mono output that can be connected to a subwoofer.

It is equipped with a mix mode that can output any combination of video and audio sources.

The video circuit uses a wide-band video amplifier with a horizontal resolution of more than 1,000 lines.

Normal video input cannot be output to S-video ; DSP-applied signals can only be output in analog form.

Center output is available for three modes : Dolby, Theater, and Live Concert.

There are 2 variations, black and titanium gray.

A programmable remote controller is included.

Model Rating

Type	AV amplifier
Amplifier Unit
Maximum practical power (EIAJ, 6 Ω)	Front : 120W + 120W Center : 120W Rear : 50W + 50W
Rated output	Front : 85W + 85W (20 hz ~ 20 khz, 6 Ω)
Frequency characteristic	10 Hz to 20 kHz ± 1 dB (for input other than Phono Equalizer / Dynamics / Surround all OFF)
Harmonic distortion factor (1 kHz, 6 Ω)	0.03% or Less (Front, 80Wx2, Center / Rear OFF)
Signal-to-noise ratio (A Network, front)	Tuner, CD, Tape1/2, Video1-5, LD, TV : 92 dB Optical1/2, Coaxial : 98 dB
<DSP Unit>
Equalizer	Number of bands	Bass, Mid (Parametric), Treble Front, Center and Rear Independently Adjustable
	Frequency	20 Hz to 18 kHz (1/6 octave setting)
	Level Width	± 12 dB per band in 0.2 dB steps
	Slope (Q)	3 Levels (Mid Only)
Dynamics	Compressor	9 levels
	Expander	9 levels
Surround	Room Size	20 levels
	Wall	20 levels
	Seat position	F-R : 20 stages L-R : 20 levels (constant for live concerts / theaters)
	Effect level	20 levels
	Reverb time	20 levels
	Delay time	15.0 ms to 30.0 ms, 0.1 ms step (Dolby Sa in a round)
	Center level	+ 10 ms ~ -50, - ∞ dB (1 dB step)
	Rear level	+ 10 ms ~ -50, - ∞ dB (1 dB step)
	Input balance	Auto
<Converter Section>
A/D converter	Type	High density linear converter system
	Sampling frequency	48kHz
D/A converter	Type	Advanced Pulse D/A converter
	Sampling frequency	32 khz, 44.1 khz, 48 khz
<General>
Pwer	100 VAC, 50Hz/60Hz
Power consumption	245W
External dimensions	Width 470x Height 150x Depth 400 mm Side Wood Removal : Width 430 mm
Weight	16.4kg
Attachment	System Remote Controller RM-P850