และข่าวดีสำหรับคนใช้ลำโพง 4 ohms ด้วยครับ
(ข้อความตัดมาจาก F2 owner manual)
At 5 watts into 8 ohms the F2 is less powerful than the F1,
but it is biased at nearly twice the current,
so it does a better job into 4 ohms, and can more easily
drive some of the correction networks that you might use to
adjust your speaker’s response.
My own experience is that the kinds of speakers this amplifier
is intended for are usually happy within a 4 watt window.
Summary of the nominal specifications:
Measured at 120 V AC with a 25 ohm source and an 8 ohm load:
Input Impedance: 50 Kohms
Output impedance: 15 ohms
Output power 8 ohms: 5 watts @ 4% THD 1KHz
Output power 4 ohms: 10 watts @ 9% THD 1KHz
Gain: 15.6 dB
Maximum output voltage: +/- 9 volts
Maximum output current: +/- 2.4 amps
Frequency response: - 1 dB @ 3 Hz, 200 KHz
Noise: 20 uV unweighted, 20-20 KHz
Power consumption: 150 watts (~75 watts / channel)
Fuse: 3AG slow blow type, 4 Amp for 120VAC 2Amp for 240 VAC
