User Manual

V-4B Bass Guitar Amplifier

Service Information

f you are having a problem with your V-4B amplifier, you can go to our website

(www.ampeg.com)

and click on Support for service information, or call Technical

Support at 1-800-898-3211

Monday-Friday during

normal business hours, Pacific Time

to receive assistance. If you are outside of the U.S., contact your local distributor for

technical support and service.

V-4BTECHNICALSPECIFICATIONS

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 120VAC, ~60Hz, 200W (US)

220-240VAC, ~50-60Hz, 200W (EU)

100VAC, ~50-60Hz, 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.

“Ampeg” is a registered trademark of LOUD Technologies Inc. All other brand names mentioned are trademarks

or registered trademarks of their respective holders and are hereby acknowledged.

www.ampeg.com

16220 Wood-Red Road NE • Woodinville, WA 98072

Part No. SW0981 Rev. B 09/13