Stirling Broadcast AB-2 Bass Extender Loudspeaker

LS3/5a AB-2

Drawing on decades of experience of loudspeaker design Derek Hughes designed the Stirling Broadcast AB-2 Bass Extender to seamlessly integrate with all versions of the legendry LS3/5a including both the classic 15 ohm and 11 ohm. When used with the Stirling Broadcast BBC licensed LS3/5a (shown in the photographs) it makes an exceptional musical partnership.

The original Rogers’ AB-1, although loved by many listeners, also had its critics over it’s limited performance. Here with the AB-2 Derek has designed a bass extender which both retains the essential musical character of the LS3/5a whilst providing better audible progression through the bass registers. The AB-2 provides more ‘scale’, for instance for orchestral works or modern music forms which require fast bass handling. 

Taking advantage of our custom, modern, drive units the AB-2 used a high quality crossover to band-pass the signal to the LS3/5a, and a cabinet with a larger internal volume cabinet than the original AB-1. The Stirling AB-2 is 48mm taller and the plinth is larger, measuring 25mm x 255mm x 235mm (HxWxD) making the AB-2 a more stable platform on which to sit the LS3/5a. 

Technical Specifications

Power handling:

60w continuous, 110w short term, IEC268

Max sound level:

100dB, pair @2m

Input impedance:

11 ohms nominal

Input connections:

Bi-wire, 4mm terminals (plugs/wires to 4mm cross sectional area)

Freq. response:

52Hz to 125Hz +/-3dB (on HF axis @1m)


2nd order 125Hz



Cabinet details:

Symmetrically loaded band-pass. 188mm(w) x 168mm (d) x 606mm (h)


Shipping weight 24kg per pair

Veneers available:

Cherry, English Oak, Zebrano, Ebony Tiger Stripe, Rosewood

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