Ground Zero ULTRA M-80

- GENERAL SPECIFICATIONS: - Speaker type 80 mm / 3.15? SQ midrange speaker - Nominal impedance 4 ohms - Frequency Response 150 Hz ? 15 kHz - Basket type Multipiece machined aluminum - Cone material High-Tech Kevlar® - Motor High-grade Neodymium - Voice coil diameter 20 mm / 0.79? - Max. excursion (p2p)- Xmax 7 mm / 0.28? - Power handling (RMS) 70 Watts - Power handling (max) 110 Watts - Outer diameter 93,8 mm / 3.69? - Mounting diameter 76,5 mm / 3.01? - Mounting depth 42 mm / 1.65? - PARAMETERS: - Resonance frequency - fs 127 Hz - Efficiency - SPL 88 dB - DC voice coil resistance - Re 3.5 ohms - Driver´s Q (nonelectrical losses only) - Qms 6.76 - Driver´s Q (at fs) - Qes 0.43 - Total driver´s Q - Qts 0.40 - Air vol. compliant to driver´s suspension - Vas 0.9 L - Moving mass incl. acoustic load - Mms 3.15 g - Product of magnetic flux density - BL 4.52 N/A - Mech. resistance of driver´s suspension - Rms 0.37 kg/s - Compliance of driver´s suspension - Cms 0.50 mm/N - Voice coil inductance - LE 0.04 mH - FEATURES: - Ultra-high-end 80 mm / 3.15? midrange speaker - Tightly tolerated technical parameters - High-Tech Kevlar® cone - Linear moving NBR surround - High-grade neodymium motor with copper cup - Vented voice coil former reducing distortion - Round CCAW wire voice coil increasing highest efficiency - Fine-blasted, black anodized GZ-design basket from machined aluminum parts - Optimized motor and voice coil ventilation - Airflow-optimized aluminum cast spokes - Gold plated terminals - Documented final technical inspection - Wooden box packaging / in matching pairs - NRG protection grills with aluminum ring