1970 Ampeg SVT "Blue Line" – Rare Pre-Magnavox / Linden, NJ Production – Vintage 300W Tube Head

You're looking at a very good condition 1970 Ampeg SVT "Blue Line" in very good condition. The amp works as should and seems to be all original. It even comes with the original vinyl cover. The pots and switches are a bit scratchy when turned or switched.

Available now is a stunning example of bass history: a 1970 Ampeg SVT "Blue Line" (Serial #100637). This isn't just an amplifier; it’s a survivor from the legendary Linden, New Jersey factory, produced before the 1971 Magnavox takeover.

While the very first SVTs debuted in late 1969, this early 1970 model represents the "sweet spot" of the vintage era—retaining the original circuit design and hand-assembled quality of the Linden era, while moving into the more reliable and powerful 6550 tube configuration that defined the rock-and-roll sound of the 70s.

Historical Significance & Construction

Linden, NJ Origin: Proudly bearing the "The Ampeg Company, Linden NJ" badge. This signifies it was built by the original team of engineers responsible for the SVT’s 300-watt revolution.

Blue Line Aesthetics: Features the iconic plexiglass faceplate with crisp blue graphics and the classic "Blue Line" styling that collectors crave.

The "Pre-Magnavox" Difference: Built with heavy-duty iron transformers and the sought-after inductor-based midrange circuit, offering a musicality and "growl" that modern reissues struggle to replicate.

Technical Specifications

• Power Output: 300 Watts of pure vacuum tube power.
• Serial Number: 100637 (Early 1970 Production).
• Era-Correct Features: Hand-wired eyelet board construction, original-style rocker switches, and the classic "SVT" presence.
• Chassis: Original metal chassis with rear-mounted cooling fan and Linden-stamped identification.

Tone Profile

This Blue Line delivers the quintessential SVT experience: massive headroom, a thick and punchy low-end, and a midrange that can cut through any mix with a distinct, harmonically rich saturation. Whether you’re looking for the "Rolling Stones '69 Tour" grind or the smooth, authoritative thump of 70s funk and soul, this amp provides the authentic foundation.

Collector’s Note: Early SVTs like this are increasingly rare, especially those that retain their Linden, NJ heritage. As a "Pre-Magnavox" unit, this is a blue-chip investment for players and collectors alike.

SPECIFICATIONS

• Serial Number: 100637
• Model: SVT
• Manufactured Date: 1970
• Manufactured Location: Linden, NJ