Ampeg PF-20T 20w All Tube Bass Amplifier Head Features:

• RMS power output : 20W @ 4 or 8 ohms
• Preamp: All-tube 2 x 12AX7
• Power amp: All-tube 2 x 6V6
• Tone controls: Bass, Mid, Treble
• Input gain control
• Preamp balanced line out :

1. Pre/Post EQ
2. Ground lift

• Transformer balanced line out : Ground lift
• No speaker load required
• User-adjustable bias control
• Dimensions : 7.3 x 13.0 x 10.4 in / 185 x 330 x 264 mm
• Weight : 15.2 lb / 6.9 kg

Specifications:

• Preamp : All-tube 2 x 12AX7
• Power Amp : All-tube 2 x 6V6
• Output Power Rating :
• 20 watts @ 8 ohms, 10% THD
• 20 watts @ 4 ohms, 10% THD
• Signal to Noise Ratio : 60 dB (20 Hz–20 kHz, unweighted)
• Maximum Gain Input: 54 dB

• Tone Controls

1. Bass: +8/–12 dB @ 50 Hz
2. Midrange: +5/–15 dB @ 550 Hz
3. Treble: +13/–20 dB @ 4 kHz

• Power Requirements :

1. 120 VAC, 60 Hz, 50W
2. 100 VAC, 50-60 Hz, 50W
3. 220-240 VAC, 50-60 Hz, 50W

• Size (H x W x D) :

1. 7.3 in x 13.0 in x 10.4 in
2. 185 mm x 330 mm x 264 mm

• Weight : 15.2 lb / 6.9 kg (approximately)