Pioneer A-D1

Commentary

A pre-main amplifier developed with the technology of advanced equipment.

Direct Energy MOS-FET is used as the power element. Since the resistance value of Direct Energy MOS-FET during operation is very small, it is possible to set the supply voltage low. This minimizes energy loss which adversely affects sound quality, and realizes excellent power linearity, low load drive capability and compact circuit.
In addition, they are fixed extruded material heat sinks to eliminate mutual interference.

Sound stabilizer is used in the chassis structure.
This system consists of a transformer stabilizer for the power transformer and a chassis stabilizer that does not transmit external vibration to the inside. This system increases the rigidity of the entire housing.
In addition, we have adopted an aero wing chassis whose rigidity has been increased by computer analysis.

Wide range linear circuit is used for the circuit structure.
This circuit uses a simple circuit configuration to obtain the necessary gain by current feedback type one stage amplification. It has excellent power supply linearity and enables a speaker drive with stable output impedance characteristics over a wide range.

A silent microcomputer is used in the operation section to minimize the influence on the SN ratio during actual use by operating only when necessary.

It is equipped with sound adjustment functions such as tone control and loudness.
It also has a direct switch that passes through balance and tone circuits, allowing you to enjoy fresher sound.

Equipped with SR terminal that can be linked with Pioneer's component.

Equipped with phono input.

Wireless remote control is included.

Model Rating

Type	Pre-main amplifier
Maximum practical power	75W + 75W (EIAJ, 4 Ω)
Rated Output (Both channel drive)	45W + 45W (4 ohm, 20 hz to 20 khz, 0.15%) 35W + 35W (8 ω, 20 Hz to 20 kHz, 0.1%)
Input Sensitivity / Impedance	Phono MM : 2.8mV/50k Ω CD, Tuner, Aux, Tape1/CD-R/MD, Tape2/Monitor : 200mV/50k Ω
Phono maximum allowable input	Phono MM : 150 mV (1 kHz, 0.1%)
Output Level / Impedance	Tape1/CD-R/MD, Tape2/Monitor : 200mV/1k Ω Tape rec : 200mV/1k Ω
Frequency characteristic	Phono MM : 20 Hz to 20 kHz ± 0.3 dB CD, Tuner, Aux, Tape1/CD-R/MD, Tape2/Monitor : 5 Hz to 100 kHz + 0 -2dB
Tone control	Bass : ± 8 dB (100 Hz) Treble : ± 8 dB (10 kHz)
Loudness contour (Vol -30dB)	+ 5 dB (100 Hz), + 3 dB (10 kHz)
Signal-to-noise ratio (IHF, A-network, short circuit)	Phono MM:85dB(at 5mV) CD, Tuner, Aux, Tape1/CD-R/MD, Tape2/Monitor : 106 dB
Speaker load impedance	A, B : 4 Ω ~ 16 Ω A + B : 8 Ω ~ 32 Ω
AC outlet	Power Switch Interlock : 2 Systems (100W) Power switch not linked : 1 system (100W)
Power supply voltage	100 VAC, 50Hz/60Hz
Power consumption	100W (Electrical Appliance and Material Control Law)
External dimensions	Width 420x Height 114x Depth 307 mm
Weight	4.7kg
Attachment	Wireless Remote Control