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    Key Features: SM Series

    Uploaded by

    MeD Amiri
    This document provides information about the SM118/N low frequency transducer. It has a 3" copper voice coil and is designed for high power applications up to 400 watts. It has an extended frequency response in the medium range and incorporates materials and design features that allow for increased power handling capacity and durability. The SM118/N is recommended for use as a woofer in speaker systems.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Key Features: SM Series

    Uploaded by

    MeD Amiri
    15 views2 pages
    This document provides information about the SM118/N low frequency transducer. It has a 3" copper voice coil and is designed for high power applications up to 400 watts. It has an extended frequency response in the medium range and incorporates materials and design features that allow for increased power handling capacity and durability. The SM118/N is recommended for use as a woofer in speaker systems.

    Original Description:

    Haut parleur bnc

    Original Title

    SM-118_N-8

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    This document provides information about the SM118/N low frequency transducer. It has a 3" copper voice coil and is designed for high power applications up to 400 watts. It has an extended frequency response in the medium range and incorporates materials and design features that allow for increased power handling capacity and durability. The SM118/N is recommended for use as a woofer in speaker systems.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    15 views2 pages

    Key Features: SM Series

    Uploaded by

    MeD Amiri
    This document provides information about the SM118/N low frequency transducer. It has a 3" copper voice coil and is designed for high power applications up to 400 watts. It has an extended frequency response in the medium range and incorporates materials and design features that allow for increased power handling capacity and durability. The SM118/N is recommended for use as a woofer in speaker systems.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    SM118/N

    SM118/N
    S M S e r i e s

    KEY FEATURES
    • High power handling (400 w AES)
    • 3” (77 mm.) copper voice coil with apical former
    • Optimum winding length for increased linear
    excursion
    • Extended response in the medium frequency range
    • Designed for high power woofer applications

    GENERAL DESCRIPTION
    The design concept of this low frequency transducer arises from the need of achieve a more resistant loudspeaker that matches
    the more and more power given by ultimate amplification systems. In order to accomplish that, almost every component of the
    speaker has been reconsidered. The SM-118/N incorporates a 3” voice coil made with high quality materials: copper round wire
    with high temperature bonding strength and apical former. Moreover, it features a powerful magnet system with rear air
    ventilation. All these facts result in a 18” driver with extended and smooth low-mid frequency response, reduced harmonic
    distortion, good efficiency and excellent power handling (400 w AES). The SM-118/N is specially recommended for woofer
    applications.

    FREQUENCY RESPONSE AND DISTORTION CURVES FREE AIR IMPEDANCE CURVE

    Note: on axis frequency response measured with loudspeaker standing


    on infinite baffle in anechoic chamber, 1w @ 1m.

    PREDICTED LOW FREQUENCY RESPONSE POWER COMPRESSION LOSSES

    5,0
    4,0
    dB

    3,0
    2,0
    1,0
    50 120 190 260 330 400
    Power (W)
    Note: Bass-reflex cabinet, Vb=150 l, fb=45 Hz
    Note: These losses are calculated from a five minutes AES power test
    applying band limited pink noise (25-1200 Hz). The loudspeaker is free-air
    standing.
    SM118/N
    SM118/N
    S M S e r i e s

    TECHNICAL SPECIFICATIONS DIMENSION DRAWINGS


    Nominal diameter 460 mm. 18 in.
    Rated impedance 8 ohms.
    Minimum impedance 7.4 ohms.
    Power capacity * 400 w AES
    Program power 800 w
    Sensitivity 97 dB 2.83v @ 1m @ 2π
    Frequency range 30 - 3000 Hz
    Recom. enclosure vol. 60 / 150 l 2.12 / 5.3 ft.3
    Voice coil diameter 77 mm. 3 in.
    Magnetic assembly weight 5 kg. 11 lb.
    BL factor 18.3 N / A
    Moving mass 0.123 kg.
    Voice coil length 18 mm.
    Air gap height 7 mm.
    X damage (peak to peak) 30 mm.
    MATERIALS
    MOUNTING INFORMATION
    • Voice coil: copper round wire with high temperature
    Overall diameter 460 mm. 18.11 in. bonding strength. Apical former able to withstand
    Bolt circle diameter 438 mm. 17.24 in. high temperatures.
    Baffle cutout diameter: • Cone: high stiffness paper cone.
    - Front mount 415 mm. 16.34 in. • Surround: specially treated cloth surround.
    - Rear mount 412 mm. 16.22 in. • Spider: cotton spider.
    Depth 187 mm. 7.36 in.
    • Metal parts: effective protection against corrosion.
    Volume displaced by driver 7l 0.26 ft.3
    • Basket: specially designed die cast aluminium bas-
    Net weight 7 kg. 15.43 lb.
    ket to avoid disturbing resonances.
    Shipping weight 8 kg. 17.63 lb.
    • Magnet: high Curie temperature ferrite.

    THIELE-SMALL PARAMETERS **
    Notes:
    Resonant frequency, fs 36 Hz
    D.C. Voice coil resistance, Re 6.4 ohms. *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.
    Mechanical Quality Factor, Qms 6.83
    **T-S parameters are measured after an exercise period using a preconditioning power test.
    Electrical Quality Factor, Qes 0.53 The measurements are carried out with a velocity-current laser transducer and will reflect the long
    Total Quality Factor, Qts 0.49 term parameters (once the loudspeaker has been working for a short period of time).

    Equivalent Air Volume to Cms, Vas 300 l


    Mechanical Compliance, Cms 161 µm / N
    Mechanical Resistance, Rms 4.1 kg / s
    Efficiency, ηo (%) 2.5
    Effective Surface Area, Sd (m2) 0.1150 m2
    Maximum Displacement, Xmax 5.5 mm.
    Displacement Volume, Vd 630 cm3
    Voice Coil Inductance, Le @ 1 kHz 1.1 mH

    acústica beyma,s.a.

    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: beyma@beyma.com ·

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