Restoring a KEF Coda

The original KEF Coda (1971–1977) was a high-performance, ultra-compact bookshelf speaker designed to bring KEF’s advanced engineering to a more affordable market. It is best known for using the same legendary drive units found in the iconic BBC LS3/5A mini-monitor.

Key Specifications (Model SP1034)

The first-generation Coda utilized a two-way system housed in a small, closed-box (infinite baffle) cabinet. 
Bass/Midrange Driver: The B110 (SP1003) 5-inch unit featured a Bextrene cone coated with plastiflex to reduce coloration and ensure smooth frequency response.
Tweeter: The T27 (SP1032) 0.75-inch dome tweeter, constructed with a Melinex diaphragm, provided high-frequency extension well beyond 20kHz.
Cabinet Design: A compact 7-litre enclosure finished in natural wood veneers like teak or walnut.

Performance:

Nominal Impedance: 8 ohms.
Frequency Response: Roughly 45Hz to 40kHz (overall) with a ±3dB range typically between 85Hz and 20kHz.
Power Handling: 15–30 watts. 

The 1971 Coda is highly sought after by vintage audio enthusiasts because it offers an "Entry level LS3/5A" experience. While the cabinet design and crossover tuning differ from the BBC spec, the core sonic character of the B110/T27 pairing remains one of the most respected in British audio history