Sony - TA-N900 Solid state mono block power amplifier
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Description from the seller
IMPORTANT: THIS UNIT IS ORIGINAL JAPANESE, FULLY HAND-assembled AND OPERATES AT 100 VOLTS. Therefore a transformer is necessary in countries with a different voltage.
SONY TA-N900. ¥ 250,000 (around 1980)
The second unit ESPRIT and Best Stereo Sound Product of the winter of 1981, together with the TA-E900 companion.
A mono power amplifier developed without compromise in terms of components, circuits, power supply, construction, and even interfaces.
The TA-N900 uses this power MOSFET and also employs a recently developed distortion-reduction circuit that allows the power element to operate in Class A in most areas while regulating the power stage’s drive voltage to correct linearity.
The power supply section uses an enhanced switching power supply (PLPS).
The power supply is Sony’s pulse-blocking power supply, which chops AC to 20 kHz; heat regulation is achieved with a heat tube connected to a BSL wheel fan for an accelerated air flow of 200 W in Class A.
Equipped with a protection circuit, it detects the DC voltage of the output of the power amplifier, the temperature of the power MOSFET, and the load impedance, and when the speaker or power amplifier becomes dangerous, the output is cut and the speaker and the TA-N900 are shut down. Protected.
Equipped with a speaker impedance switch to drive 8Ω/4Ω/2Ω speakers in the most efficient and stable way.
This controls the supply voltage to the power stage of the switching power supply so that the nominal output is 200 W in pure CLASS A at each setting, allowing it to respond to differences in speaker load.
Also, when using a 16Ω speaker, the output will be 100W according to the 8Ω position.
It uses a high-efficiency cooling system that uses heatpipes and cross-flow fans, achieving a high-performance 200W amplifier despite its small size and slim profile.
This heat tube is an application of spacecraft thermal treatment technology and has a thermal conductivity several hundred times greater than a metal rod of the same diameter.
The cross-flow fan uses the linear torque brushless BSL motor used in Sony’s player and cassette systems, supporting a quiet and reliable cooling system. This two-stage cooling structure allows the output elements to be concentrated in one place, greatly shortening the wiring around the huge current-carrying elements and suppressing the audio-quality impact from EMI that bleeds into the previous stage.
This original unfabricated Japanese import also has a much lower standby power consumption.
Another reason to buy 100V devices!
Original*) 100V, Japanese import, very good technical and cosmetic condition.
SPECIFICATIONS:
Power: 200W (20Hz...20kHz, 2...8 Ohm)
THD: 0.05% (8 Ohm)
0.1% (4 Ohm)
0.2% (2 Ohm)
IMD: 0.05% (8 Ohm)
0.1% (4 Ohm)
0.2% (2 Ohm)
Damping factor: 50 (1kHz / 8 Ohm)
Residual noise: 20µV (8 Ohm, IHF-A)
S/N ratio: 120dB (8 Ohm at rated power)
Power bandwidth: 5Hz...70kHz (IHF)
Frequency response: DC...100kHz (+0/-3dB ; direct input)
5...100kHz (+0/-3dB, with coupled input)
DC or AC input: 1.7 Ohm / 50kOhm
Output: 2...16 Ohm
Idling current: 100mV
PC: 270W (AEP model)
530W (UK model)
175W (US model)
Dimensions: 48 x 8 x 44.5 cm (with rack handles)
44 x 8 x 44.5 cm (without rack handles)
Weight: 10.5 kg
Accessories: optional rack handles
List price: 2x 250,000¥ (October 1980)
2x 250,000¥ (1983)
2x 1,750$ (1983)
IT FUNCTIONS PERFECTLY. YouTuber Miguel Ángel Racero does the following review of precisely this unit I’m offering in this auction:
https://www.youtube.com/watch?v=TpFwQMI9suc
https://www.youtube.com/watch?v=HDWbIZSDBY4
IMPORTANT: THIS UNIT IS ORIGINAL JAPANESE, FULLY HAND-assembled AND OPERATES AT 100 VOLTS. Therefore a transformer is necessary in countries with a different voltage.
SONY TA-N900. ¥ 250,000 (around 1980)
The second unit ESPRIT and Best Stereo Sound Product of the winter of 1981, together with the TA-E900 companion.
A mono power amplifier developed without compromise in terms of components, circuits, power supply, construction, and even interfaces.
The TA-N900 uses this power MOSFET and also employs a recently developed distortion-reduction circuit that allows the power element to operate in Class A in most areas while regulating the power stage’s drive voltage to correct linearity.
The power supply section uses an enhanced switching power supply (PLPS).
The power supply is Sony’s pulse-blocking power supply, which chops AC to 20 kHz; heat regulation is achieved with a heat tube connected to a BSL wheel fan for an accelerated air flow of 200 W in Class A.
Equipped with a protection circuit, it detects the DC voltage of the output of the power amplifier, the temperature of the power MOSFET, and the load impedance, and when the speaker or power amplifier becomes dangerous, the output is cut and the speaker and the TA-N900 are shut down. Protected.
Equipped with a speaker impedance switch to drive 8Ω/4Ω/2Ω speakers in the most efficient and stable way.
This controls the supply voltage to the power stage of the switching power supply so that the nominal output is 200 W in pure CLASS A at each setting, allowing it to respond to differences in speaker load.
Also, when using a 16Ω speaker, the output will be 100W according to the 8Ω position.
It uses a high-efficiency cooling system that uses heatpipes and cross-flow fans, achieving a high-performance 200W amplifier despite its small size and slim profile.
This heat tube is an application of spacecraft thermal treatment technology and has a thermal conductivity several hundred times greater than a metal rod of the same diameter.
The cross-flow fan uses the linear torque brushless BSL motor used in Sony’s player and cassette systems, supporting a quiet and reliable cooling system. This two-stage cooling structure allows the output elements to be concentrated in one place, greatly shortening the wiring around the huge current-carrying elements and suppressing the audio-quality impact from EMI that bleeds into the previous stage.
This original unfabricated Japanese import also has a much lower standby power consumption.
Another reason to buy 100V devices!
Original*) 100V, Japanese import, very good technical and cosmetic condition.
SPECIFICATIONS:
Power: 200W (20Hz...20kHz, 2...8 Ohm)
THD: 0.05% (8 Ohm)
0.1% (4 Ohm)
0.2% (2 Ohm)
IMD: 0.05% (8 Ohm)
0.1% (4 Ohm)
0.2% (2 Ohm)
Damping factor: 50 (1kHz / 8 Ohm)
Residual noise: 20µV (8 Ohm, IHF-A)
S/N ratio: 120dB (8 Ohm at rated power)
Power bandwidth: 5Hz...70kHz (IHF)
Frequency response: DC...100kHz (+0/-3dB ; direct input)
5...100kHz (+0/-3dB, with coupled input)
DC or AC input: 1.7 Ohm / 50kOhm
Output: 2...16 Ohm
Idling current: 100mV
PC: 270W (AEP model)
530W (UK model)
175W (US model)
Dimensions: 48 x 8 x 44.5 cm (with rack handles)
44 x 8 x 44.5 cm (without rack handles)
Weight: 10.5 kg
Accessories: optional rack handles
List price: 2x 250,000¥ (October 1980)
2x 250,000¥ (1983)
2x 1,750$ (1983)
IT FUNCTIONS PERFECTLY. YouTuber Miguel Ángel Racero does the following review of precisely this unit I’m offering in this auction:
https://www.youtube.com/watch?v=TpFwQMI9suc
https://www.youtube.com/watch?v=HDWbIZSDBY4
Details
Era
1900-2000
Brand
Sony
Model
TA-N900
Multiple models
No
Physical condition
Excellent
Number of objects
1
Includes
No extra's
Serial number
200649
Year of manufacturing
1981
Weight
10.5 kg
Functional condition
Tested and working/playable
Height
80 mm
Width
480 mm
Depth
445 mm
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