DIATONE DA-A100

Commentary

A stereo power amplifier paired with the DA-P100.

A two block configuration with a voltage amplifier in front of the power amplifier is adopted.
As a result, power amplifier problems such as S/N and distortion have been greatly improved along with stable NFB.

H for the power transistor_FEA power ratio of 3.0 is achieved by carefully selecting products with good linearity of (direct current amplification factor) and high fa (high cut-off frequency).
In addition, by using the single push-pull method, we have obtained excellent sound quality results such as reduction of notch distortion.

We consider the power supply unit as an integral part of the amplifier stage and improve the quality of the parts themselves to improve the overall quality.
The power transformer uses a cut core instead of an EI-structure transformer with much loss, and the capacity is increased to 400 VA to improve regulation.
In addition, in order to obtain a large output with a 4 Ω load of 150W, the filter capacitor of the power supply has a sufficient low impedance and allows a large current to flow. The capacitor has a capacitance of 22000 μ F and a current capacity of 36A.

Radiator The protective circuit is designed to operate at 100 ° C.

Equipped with one power transistor and one abnormality detection circuit.

Model Rating

Type	Stereo power amplifier
Output	Both channel operation : 150W + 150W (4 Ω) 100W + 100W (8 Ω) Single channel operation : 180W/180W (4 Ω) 110W/110W (8 Ω) Music Power : 450W (4 Ω) 250W (8 Ω) EIAJ: 340W (4 Ω) 220W (8 Ω)
Harmonic distortion factor	0.1% (at rated output)
Cross modulation distortion factor	0.15% (at rated output)
Input Sensitivity / Impedance	1V/100k Ω
Power bandwidth	20 Hz to 20 kHz
Frequency characteristic	10 Hz to 30 kHz -0.5 dB
Residual noise	0.25mV
Damping factor	200
Semiconductor used	Transistor : 35 Diode : 25 pcs
Pwer	100 VAC, 50Hz/60Hz
Power consumption	205W
External dimensions	Width 360x Height 223x Depth 268 mm
Weight	16kg