How do I date a 1950s Standel?

By the factory era and the construction details, then by EIA component codes on the original parts, which are the only route inside the 1953 to 1967 window.

What is a first-design Standel?

The earliest hand-built series with the knobs on top of the amp, roughly the first 75 units, all custom-ordered.

What identifies a later Standel?

The factory moves and the technology: El Monte production from 1968, solid-state amps from 1964, the CMI years after 1972 and the Glendale revival from 1997.

The maker's archive

Standel amps.

Q: Why is there no Standel serial table?

The early amps were custom-built to order, the original company closed around 1972 and the modern brand publishes no vintage serial data. The canon records this as honest no-data.

Standel has no published serial table. The early amps were custom-built to order by Bob Crooks, the original company closed around 1972 and the modern brand publishes no vintage serial information, so the factory era, construction details and EIA component codes carry the dating.

Country: USA
Active since: 1953
Coverage: 1953–2007 · 3 code systems
Dating tier: Honest no_data
In the archive: 0 series · 3 code systems · 5 models
Years documented: 1953–2007

Eras

1953–1967

Temple City

Crooks built the first amps by hand and to order in Temple City, California. The first design — knobs on top, a padded naugahyde cabinet, aluminium guards and a lighted control panel — covers roughly the first 75 amps, and Standel was the first company to use JBL speakers in production amplifiers.

1961–1973

Solid state and El Monte

Crooks began experimenting with semiconductors in 1961, had a hybrid within two years and a solid-state amp on the market by 1964. The second factory at El Monte, California covers the transition, and the original company went out of business around 1972.

1972–1976

CMI and SG Systems

Quality-control problems with poorly manufactured power transistors forced Crooks to sell to CMI of Chicago, for whom he designed the SG series amplifiers.

1997 to today

Revival and today

Requisite Audio Engineering revived the brand in Glendale, California and showed the 25L15 prototype at the January 1998 NAMM show; current production is hand-built in Ventura, California.

What dates this maker

The company and factory era: Temple City 1953–1967, El Monte 1968–1973, the CMI and SG period, the Glendale revival 1997–2007 and current Ventura production.
Construction and cosmetics: the first design with knobs on top, padded naugahyde cabinets, aluminium guards, open-weave hi-fi grille cloth and 15-inch JBL D-130 speakers.
EIA component codes — the only dating path inside the 1953–1967 window.
Solid-state circuitry, which arrived by 1964 and marks the later years.

Watch out

The serial number does not help: no mapping was ever published.
Inside the hand-built years one component code can be the only surviving original part, so two independent codes should agree.
The first-design term covers only about the first 75 amps, so it marks the earliest production rather than a year.

Honest no_data: Standel has no published serial-number table. The early amps were custom-built to order by Bob Crooks (the first ~75 in his Temple City backyard workshop, from 1953), the original company closed around 1972, and the modern Standel brand publishes no vintage serial information. Dating therefore rests on (1) the model and its era — 25L15 and the 1950s tube line at Temple City (1953-1967), the El Monte years (1968-1973), the solid-state era from the mid-1960s, the CMI/SG Systems period, the Requisite Audio Engineering revival in Glendale (1997-2007) and the current Ventura production; (2) cosmetics and construction (the 'knobs on top' first design, padded naugahyde cabinets with aluminium guards and a lighted control panel, open-weave hi-fi grillecloth, 15 in. JBL D-130 speakers); and (3) EIA component codes.See the component codes →

5 Standel models are catalogued with their production years, specs and safety notes.