Hifi Teufel Floor stand speakers. The Teufel Ultima 40 Mk2) is a passive 3-way floorstanding speaker, known for its powerful bass reproduction and high load capacity up to 200 watts. The 3-channel system has an impedance of 4 - 8 Ohm, a sensitivity of 87 dB and a frequency range of 45 - 20,000 Hz, suitable for rooms up to 35 Here are the main specifications of the Teufel Ultima 40 Mk2: Acoustic principle: 3-way system, Bass reflex. Load Capacity (IEC - Short Term): 200 Watt. Impedance: 4 - 8 Ohms. Sensitivity (2.83 V / 1 m): 87 dB. Tested and operational ! Small signs of use but nothing major or affects performance of speaker sound quality.