Amplifier Characteristic; Speaker Characteristic - Hitachi 14LD7200 Service Manual

4.2 AMPLIFIER CHARACTERISTIC

4.2.1 Output Power ( Unit : Watt)
1). Effective Output ﹕ 2.5 Watts ( measure at the output voltage of 1％ Distortion Factor)
2). Maximum Output ﹕ 3 Watts (measure at the output voltage of 20％ Distortion Factor)
3). Measurement method
－ Set Test Equipment
Meas ﹕ LEVEL ,
AMPTD ﹕ Vrms,
－ Measure output voltage ( RMS)
－ Output calculation formula ﹕ P=V2/R
V﹕ RMS value of output voltage

4.3 SPEAKER CHARACTERISTIC :

4.3.1 Input ﹕ Normal 2.5 Watt
Impedance ﹕ 4.5 ohm ±15% ohm at 1KHz
4.3.2
4.3.3 Resonant Frequency ( f0)﹕150± 10% Hz
4.3.4 Frequency Range: 20Hz ~ 20KHz
Freq ﹕ 1KHz
HPF/LPF ﹕ OFF
P ﹕ Output Power
30
RANGE ﹕ AUTO
R﹕ Speaker Impedance