Ground Zero ULTRA M-80

ULTRA speakers are designed for the most demanding music lover.

Carefully built by hand with the best materials and selected in pairs, they are delivered in fine wooden boxes.

- 80 mm / 3.15″ Ultra-high-end midrange speaker - Tightly-tolerated technical parameters - High-tech Kevlar® cone - Linear moving NBR surround - Vented voice coil former reducing distortion - Round CCA wire voice coil increasing power handling - Optimized motor and voice coil ventilation - Documented final technical inspection - Wooden box packaging / in matching pairs - Incl. high-quality mounting ring

Teknisk information

• 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