Ampeg V-4B Bass Amplifier Head (100 Watts)

Half the weight of an SVT head, this reissue of the legendary Ampeg V-4B bass head cranks 100 watts of all-tube power with all the rich tone of the original.

A reissue of a classic model, the Ampeg V-4B is a tried-and-true 100-watt all-tube bass head. With a design dating back to 1971, the V-4B has proved to be a reliable warhorse with a great sound ever since. This most recent release adds a few helpful modern features, while staying true to the legendary tone of the original.

8 Tubes in All

If you open up the Ampeg V-4B, you'll find 2 x 12AX7s in the preamp section, generating the rich tonal core of your bass sound. After this, the 12AX7 and 12AU7 Driver Tubes crank up your gain to drive the speakers in your cabs. The Power Amp section is comprised of 4 x 6L6GCs.

No-Nonsense Controls

The front control panel gives you a Normal and a -15dB input jack for the single channel amp. Here you'll also find Gain, Bass, Midrange, and Treble EQ knobs. A Standby switch at far right lets you cut the signal momentarily when needed.

Modern-Day I/O Setup

On the rear panel you'll find Preamp Out and Power Amp In jacks for running an FX loop. There is also a 1/4-inch Slave output for pushing the front end on another amp, or running direct into a PA or mixer. A single balanced XLR output is here as well. A Ground Lift switch helps you cut buzz when it arises.

Versatile In Use

Running to external cabinets, you can run to a single speaker at 8 ohms, a stereo pair at 4 ohms, and 4 speakers at 2 ohms nominal impedance.


- 2 x 12AX7s (Preamp)
- 1 x 12AX7 and 1 x 12AU7 (Driver)
- 4 x 6L6GC (Power)
- 3-band Tone Controls read more
- Normal and -15dB Inputs
- Balanced Line Out
- FX Loops
- Slave Output
- Balanced XLR Output
- Ground Lift switch
- 2 x 2 ohm outputs
- 2 x 4 ohm outputs
- 1 x 8 ohm output
WARNING: Cancer and Reproductive Harm -
read less

- Preamp: Tube (2 x 12AX7)
- Driver Tubes: (1 x 12AX7, 1 x 12AU7)
- Power Amp: (4 x 6L6GC)
- RMS Power Handling: 100 Watts RMS
- Speaker Outputs: 1 x 8 ohm, 2 x 4 ohm, 2 x 2 ohm
- Tone Controls: 3-band
- Mid Tone Control: 3-position rocker switch
- Ultra Hi/Lo: Yes
- -15 dB Input: Yes
- Balanced Line Out: Yes
- Preamp Out / Power Amp In: Yes
- Slave Output: Yes
- Dimensions (W x H x D inches): 24 x 11 x 11
- Weight: 41 Pounds
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 51 lbs
Shipping Dimensions: 28 x 16 x 15 in
Manufacturer Part Number (MPN): 99-026-0805

For support or warranty questions, please contact the manufacturer:
Phone: 818-575-3600

Ampeg V-4B Bass Amplifier Head 100 Watts

The Ampeg V-4B 100W All-Tube Bass Head is a remarkable reissue of the legendary 1971 original, delivering the pure tube tone and unmistakable grind that earned the classic a place in bass history. And with a careful selection of modern features, the V-4B provides Ampeg all-tube tone in a portable design perfect for today's players.

Reviewers gave this product an overall rating of 5 out of 5 stars. (7 ratings)
Submitted October 16, 2017 by Shevin Mycon in Mukilteo, WA

"Doom guitarist should rejoice"

Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
Ive had this amp for a few months with the intention of running guitar it easily does it. Clean is loud but not overbearing like most high gain guitar amps. Amp takes pedals like a dream. This amp is super loud wether bass or guitar the tone is there at loud volume however if you intend to record quiter it needs a little dial in here and there but not much at all. Im running it through a 4x12 8 ohm cab with celestion g12t-70s pretty good combo with any celestion but so far i have the tone ive been searching for forever. Anyone looking for a powerfull clean amp and running low tuned guitars (B or lower) should definitely try this amp.

Musical Background:

4 years on guitar 8 years as a musician. In a doom metal band

Musical Style:

Metal Doom Stoner sludge
11 of 11 people (100%) people found this review helpful. Did you?
Thanks for your opinion!


FREE -Day Shipping!
Get it  for
Get it by if you order within
Shipping to