Ground Zero ULTRA M-80

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