The Boulder MK-II specifications

• 2 x 220mm (8”) SEAS Woofer
• Dual Concentric 130mm (4.5”) ELAC Mid
• Range and 50kHz Folded Ribbon Tweeter
• Sealed Baltic Birch 18mm (.75”) Plywood Cabinet
• Corian 30mm (1.2”) Front Baffle Design
• 4 x Discrete A/B Amplifiers by Esoteric
• Audio Research (200 watts total)
• Balanced XLR Input
• 32Hz-38kHz +/-3dB
• 390mm D x 268mm W x 614mm H
• 15.4” D x 10.5” W x 24.2” H

Boulder MK-II Performance

The Boulder MK-II Frequency Response

30Hz-38kHz +/- 3dB





BOULDER MK-II FULL RANGE WITH HP IN CIRCUIT

High Frequency Cut/Boost Section

Boulder MK-II HF & MID Switches

These two graphs show the performance of the HF 10kHz EQ Shelf switch, Flat and cut and boost of 2.5dB. The other shows the performance of the MID cut/boost switch.