CLASS A/CLASS A SE Power Amplifier
State of art pure Class A power amplifier
Available colors
Technical description
Two toroidal, 400VA transformer, one per channel. Dual mono design. Pure class A operation up to 50W @ 8 Ohm. Only double-sided metallized polypropylene film capacitor in the critical points. The internal stages are DC coupled and the offset is reduced by means of an integrating amplifiers. High current capability. The protection and control sections are galvanically insulated from the analog sections to minimize the digital noise. No mains fuse. The mains current is measured at the input of the transformer (with a current probe) and in case of malfunctions it's shutted off. The voltage of both channel is measured by means of optocoupler to avoid any ground loop. The DC offset on the output (loudspeakers) is also monitored by means of optocouplers. The protections are realized with a PLD (Programmable Logic Device), more fast and reliable compared to a microcontroller.
Technical features
Power on 8Ω load
50W classA(200W bridged mode)
Power on 4Ω load
Power on 2Ω load
THD + N (1W, 8Ohm 1 KHz)
0,02 %
Slew Rate
50 V/μs
Frequency Response(Att. 0dB, -3dB band)
1 Hz - 160 KHz
Input Noise(Band limits 0Hz-80kHz/A-weighted)
-130 dB
> 100 dB
320 x 445 x 460 mm
61.5 Kg
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La società AF Group SRL, CF 03352850139, ha ricevuto nel corso dell’esercizio 2020 aiuti di Stato di cui all’art. 52, Legge n. 234/2012 oggetto di obbligo di pubblicazione nel Registro Nazionale degli Aiuti di Stato che sono ivi indicati nella sezione trasparenza a cui si rinvia.
AF Group SRL
Via Cesare Battisti 126G
51015 Monsummano Terme
Tel. +39 0572 030964
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