EMI DLS-1 Active Loudspeakers
The same model was rumoured to have been used in the Abbey Road studios while the Beatles recorded.
Drivers & Amplifiers (per cabinet)
2 x GEC 1853 Tweeters
1 x EMI 92390G
1 x Amplifier STD 373/DLS (Tubes EF86 ECC83 EL34 EL34 GZ34)
About the amplifiers
25 watt ultra-linear EL 34 Push/Pull tube mono block amplifier as fitted in the active EMI DLS-1 speaker, 0.1% THD, 4, 8, 16 ohm taps, EF 86, ECC83, GZ34 rectifier, special output transformers, claimed superior to Leak TL 25 plus.