Ampeg V-4B 100W Bass Head - Used

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This used Ampeg will ship insured and inspected from Rapid City, SD. In very good condition, this amp has wear and scratches covering the front and back plates, as well as some wear on the handle and casing. The footswitch is worn and rusted.

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The Ampeg V-4B is a true heavyweight from the golden era of tube bass amplification, the vintage Ampeg V-4B delivers the kind of authority, warmth, and punch that made it a staple on stages through the 1970s. Rated at 100 watts all-tube, it pairs thunderous low end with rich mids and a muscular top end that stays present in a full band mix. There is an unmistakable feel to these original heads—responsive, dynamic, and alive in a way only classic tube circuits seem to manage.

This original version features a dual-channel design with independent volume controls, allowing players to blend or switch inputs depending on their rig and playing style. Its passive EQ section includes treble, midrange, and bass controls with selectable mid frequencies at 300Hz, 1kHz, and 3kHz, offering everything from thick vintage bloom to sharper, more aggressive grind. The four 7027A power tubes are a defining part of the amp’s voice, helping create the strong headroom, compression, and harmonic character vintage Ampeg fans continue to chase.

Built in the USA with the oversized cabinet and classic styling of the era, the V-4B carries the visual presence to match its sound. At roughly 62 pounds with an attached power cable and rugged chassis construction, this is old-school gear made to last. For players who want genuine vintage Ampeg tone, road-worn character, and one of the most respected tube bass heads ever produced, the original V-4B remains a serious piece of history available at Haggerty’s Music.

Features / Specs

• Type: Bass Head
• Wattage: 100W
• Channels: 2
• Preamp Tubes: 2
• Power Tubes: 4
• Controls: Volume 1, Volume 2, Treble, Midrange, Bass, Frequency Switches
• Inputs: Two 1/4"
• Outputs: Two Speaker 1/4", Two Amp 1/4"
• Power Cable: Attached
• Dimensions: 26.5 x 10 x 11"
• Footswitch: Included