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14
V-4B Bass Guitar Amplifier

Preamp Tube 2 x 12AX7
Driver Tube 1 x 12AX7, 1 x 12AU7
Power Amp Tube 4 x 6L6GC
Output Power Rating 100W @ 8% THD+N @1 kHz for 2, 4 or 8 Ω
loads
Signal to Noise Ratio 80 dB @ 1 kHz (20 Hz–20 kHz, unweighted)
Maximum Gain 64 dB @ 1 kHz, tones centered
-3 dB @ 14 Hz and 15 kHz
Tone Controls Bass: +13/–12 dB @ 40 Hz
Midrange: +11/–21 dB @ 220 Hz, 800 Hz, 3 kHz
Treble: +14/–17 dB @ 4 kHz
Ultra Lo: +2 dB @ 40 Hz, -11 dB @ 500 Hz
Ultra Hi: +7 dB @ 8 kHz
Power Requirements 120V AC, ~60Hz, 200W (US)
220-240V AC, ~50-60Hz, 200W (EU)
100V AC, ~50-60 Hz, 200W (JP)
Size (H x W x D) 10.8 in/275 mm (with feet) x 23.8 in/604 mm
x 11.0 in/280 mm
Weight 41 lb/18.6 kg (approximately)
The V-4B is covered with a durable, fabric-backed vinyl material. Clean with a dry, lint-free cloth. Never spray
cleaning agents on the V-4B. Avoid abrasive cleansers which would damage the finish.
Ampeg continually develops new products and improves upon existing ones. For this reason, the specifications
and information in this manual are subject to change without notice.
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