8M70-V2 LOW & MID FREQUENCY TRANSDUCER KEY FEATURES • • • • Excellent power handling (90 w RMS) Good sensitivity (95 dB) Smooth frequency response and low distortion Designed for the low and mid frequency DIMENSION DRAWINGS TECHNICAL SPECIFICATIONS Nominal diameter Rated impedance Minimum impedance Power capacity* Program power Sensitivity Frequency range Recom. enclosure vol. Voice coil diameter Magnetic assembly weight BL factor Moving mass Voice coil length Air gap height 200 mm. 8 in. 8 ohms 6.3 ohms 90 w RMS 180 w 95 dB 2.83v @ 1m @ 2π 120 - 9000 Hz 20 / 50 l 0.7 / 1.77 ft.3 38.5 mm. 1.5 in. 2.75 kg. 4.18 lb. 9.8 N / A 0.019 kg. 6 mm 6 mm MOUNTING INFORMATION 90 Hz 5.9 ohms 3.52 0.76 0.62 10.54 l 156 µm / N 2.58 kg / s 1.1 0.022 m2 1 mm 100 cm3 0.9 mH 212 mm. 198.3 mm. 8.34 in. 7.80 in. 180 mm. 7.08 in. 190 mm. 7.48 in. 90 mm. 3.54 in. 1.5 l. 0.052 ft.3 2.33 kg. 5.13 lb. 2.54 kg. 5.59 lb. Notes: *The power capacity is determined according to AES2-1984 (r2003) standard. Program power is defined as the transducer’s ability to handle normal music program material. **T-S parameters are measured after an exercise period using a preconditioning power test. The measurements are carried out with a velocity-current laser transducer and will reflect the long term parameters (once the loudspeaker has been working for a short period of time). ***The Xmax is calculated as (Lvc - Hag)/2 + Hag/3.5, where Lvc is the voice coil length and Hag is the air gap height. 1210 Resonant frequency, fs D.C. Voice coil resistance, Re Mechanical Quality Factor, Qms Electrical Quality Factor, Qes Total Quality Factor, Qts Equivalent Air Volume to Cms, Vas Mechanical Compliance, Cms Mechanical Resistance, Rms Efficiency, ηo (%) Effective Surface Area, Sd (m2) Maximum Displacement, Xmax*** Displacement Volume, Vd Voice Coil Inductance, Le @ 1 kHz Overall diameter Bolt circle diameter Baffle cutout diameter: - Front mount - Rear mount Depth Volume displaced by driver Net weight Shipping weight 056 THIELE-SMALL PARAMETERS** 8M70-V2 LOW & MID FREQUENCY TRANSDUCER FREE AIR IMPEDANCE CURVE FREQUENCY RESPONSE AND DISTORTION 056 Polígono Industrial Moncada II · C/. Pont Sec, 1c · 46113 MONCADA - Valencia (Spain) · Tel. ( 34 ) 96 130 13 75 · Fax ( 34 ) 96 130 15 07 · http://www.beyma.com · E-mail: firstname.lastname@example.org · 1210 Note: on axis frequency response measured with loudspeaker standing on infinite baffle in anechoic chamber, 1w @ 1m.
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