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15XA38Nd 15XA38Nd C o a x i a l KEY FEATURES • 15” bass loudspeaker and 2” exit compression driver combination • Excellent power handling: 350 w AES (L.F. unit) and 90 w AES (H.F. unit) • Extended and linear frequency response (25-20000 Hz) • High sensitivity: 99 dB (L.F. unit) and 105 dB (H.F. unit) • Low weight (common neodymium magnet system for both units) • Bass loudspeaker designed for compact bass-reflex cabinets GENERAL DESCRIPTION This 15” coaxial loudspeaker is intended for the most demanding professional applications. Its low frequency unit features a 4” (100 mm) edgewound aluminium ribbon voice coil capable of handle 350 w AES. This bass unit has been optimized in order to fit in with the most compact bass-reflex systems. The high frequency unit uses a 2.8” (72.2 mm) aluminium ribbon voice coil and a composite structure diaphragm, that is to say, a titanium dome and polyester surround combination. All these components give as a result a coherent and extended frequency response with low distortion that ranges from 25 Hz up to 20 kHz. Moreover, the use of a common neodymium magnet system for both units reduces the weight to 6.8 kg. FREQUENCY RESPONSE AND DISTORTION CURVES FREQUENCY RESPONSE OUT OF AXIS Note: on axis filtered frequency response measured with loudspeaker standing on infinite baffle in anechoic chamber, 1w @ 1m. PREDICTED LOW FREQUENCY RESPONSE FREQUENCY RESPONSE OF LF & HF UNITS Note: bass-reflex cabinet, Vb=100 l, fb=42 Hz Note: on axis frequency response of low and high frequency units, 1w @ 1m.
15XA38Nd 15XA38Nd C o a x i a l TECHNICAL SPECIFICATIONS DIMENSION DRAWINGS L.F. UNIT Nominal diameter 380 mm. 15 in. Rated impedance 8 ohms. Minimum impedance 7.6 ohms. Power capacity* 350 w AES Program Power 700 w Sensitivity 99 dB 2.83v @ 1m @ 2p Frequency range 25-3500 Hz Recom. enclosure vol. 60 / 180 l 2.14 / 6.35 ft.3 Voice coil diameter 100 mm. 4 in. Magnetic assembly weight 4.2 kg. 9.24 lb. BL factor 18.2 N/A Moving mass 0.072 kg. Voice coil length 16 mm. Air gap height 9 mm. X damage 28 mm. MATERIALS H.F. UNIT L.F. UNIT Rated impedance 16 ohms. • Basket: Die cast aluminium Minimum impedance 13.5 ohms.@ 3.5 kHz • Cone: Paper Power capacity 90 w AES above 1 kHz Frequency range 0.5 - 20 kHz • Surround: Plasticised cloth Sensitivity 1w @ 1m 105 dB • Voice coil: Edgewound aluminium ribbon Voice coil diameter 72.2 mm. 2.87 in. • Magnet: Neodymium Flux density 1.6 T BL factor 15.3 N/A H.F. UNIT Dispersion 80° conical • Dome: Titanium • Surround: Polyester • Voice coil: Edgewound aluminium ribbon THIELE-SMALL PARAMETERS • Voice coil former: Kapton Resonant frequency, fs 33 Hz MOUNTING INFORMATION D.C. Voice coil resistance, Re 6.8 ohms. Mechanical Quality Factor, Qms 7.50 Overall diameter 388 mm. 15.28 in. Electrical Quality Factor, Qes 0.30 Bolt circle diameter 370 mm. 14.56 in. Total Quality Factor, Qts 0.29 Baffle cutout diameter: Equivalent Air Volume to Cms, Vas 359 l - Front mount 352 mm. 13.85 in. Mechanical Compliance, Cms 326 mm mm mm / N - Rear mount 352 mm. 13.85 in. Mechanical Resistance, Rms 2 kg / s Depth 181 mm. 7.13 in. Efficiency, hh hh ho (%) 4 Volume displaced by driver 7 l 0.25 ft. 3 2 Effective Surface Area, Sd (m ) 0.088 m 2 Net weight 6.8 kg. 14.96 lb. Maximum Displacement, Xmax 4 mm Shipping weight 7.4 kg. 16.28 lb. Displacement Volume, Vd 350 cm 3 Voice Coil Inductance, Le @ 1 kHz 1.6 mH Notes: *The power capacity is determined according to AES2-1984 (r2003) standard. **T-S parameters are measured after an exercise period using a preconditioning power test. Program power is defined as the transducer’s ability to handle normal music program material. 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). Poligono 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: beyma@beyma.com ·