Electro-Voice SRO/18 User's Manual
Contents
1. address for this product Electro Voice Inc 600 Cecil St Buchanan Mich 49107 Part No 535417 Litho in U S A 240 a Guiton coua ELECTRO VOICE Inc 600 CECIL ST BUCHANAN MICH 49107 MANUFACTURING PLANTS AT E BUCHANAN MICH E NEWPORT TENN E SEVIERVILLE TENN E GANANOQUE ONT E SEOUL KOREA2. drill 9 32 inch or 290 diameter letter L drill holes Apply glue to flange of TEENUTS before driving them into holes If hex nuts are used drill proper hole size to accom modate the 20 bolt Use a second nut to tighten against the first nut to prevent loosening during operation A lockwasher and flat washer are recommended between the screw head and frame See Figure 3 Screws should be tightened evenly but not excessively Maximum torque possible with a proper size screwdriver should be sufficient Do not use adhesive back gasket segments for rear mounting If a cabinet is to be constructed from scratch 4 inch solid and jointed or marine plywood is recommended After construction be certain interior is completely free of metal filings wood chips etc CONNECTIONS Use No 18 or larger stranded wire to connect the two terminals on the loudspeaker to the amplifier output If a choice of amplifier output impedance is available 4 8 16 ohms a single SRO 18 speaker should be connected to the 4 ohm tap Two SRO 18 speakers should be connected in parallel only to amplifiers designed for 2 ohm loads Be sure to connect the red terminals to gether as shown in Figure 4 If series wiring is desired wiring and polarity should follow Figure 5 The correct impedance tap for this configuration is 8 ohms j po nes a 3 8 DIA THR FIGURE 1 Dimensions FRONT GASKET CUT OUT FRONT GASKET CUT OUT REA
3. ENGINEERING SRO 18 18 INCH MUSICAL DATA INSTRUMENT LOUDSPEAKER DESCRIPTION Speakers used with amplified instruments are subjected to the severest possible operational and handling conditions Even so failure of a speaker in live performance is in tolerable The SRO 18 musical instrument speaker combines reliability with high efficiency The powerful sixteen pound magnetic structure combined with the edge wound aluminum voice coil results in efficiency unmatched in other so called high power speakers In fact the SRO 18 produces more acoustic power with a 100 watt input fhan most high power speakers at 200 watts input What about reliability Look at all the goodies super rigid eight spoke diecast aluminum frame nonfatiguing cloth cone suspension heavy duty improved design curvilinear cone to eliminate breakup and edge hole effects high heat resistant laminated coil form new heat dissipating back cover and many more techniques to provide performance you can count on There s more The SRO 18 represents flexibility un matched anywhere Installed in a correct horn or reflex load it not only provides the deep gut sound required for bass guitar but a smooth treble that produces startling performance for either lead guitar or P A That s having your cake and eating it too Power Well we rate the brute at 100 watts continuous sine wave but what does all this power do for the per former In a proper vent
4. R SPEAKER MOUNTING SURFACE FLAT WASHER LOCK WASHER FIGURE 3 Rear Mounting Detail WARRANTY Electro Voice Amplified Instrument Loudspeakers are guaranteed for the life of the speaker against failures due to defects in materials and workmanship If failure occurs under normal operating conditions your speaker will be repaired or replaced at our option without charge This warranty is void if speaker is operated above the specified power rating if altered or repaired by other than Electro Voice or its authorized service agency or if damage is the result of physical abuse Warranty does not cover finishes Speakers for warranty repair must be shipped prepaid to Electro Voice or its authorized service agency and will be returned prepaid For locations of E V service agencies please write Service Department Electro Voice Inc 600 Cecil Street Buchanan Michigan 49107 Electro Voice also maintains complete facilities for non warranty service CUSTOMER SERVICE SRO 18 speakers are packed to provide maximum pro tection well in excess of the shipping requirements of the Interstate Commerce Commission If shipping damage does occur contact the carrier immediately requesting inspection and instructions or contact the dealer from whom the unit was purchased FIGURE 4 Connection of 2 SRO 18 Speakers in Parallel BLACK o FIGURE 5 Connection of 2 SRO 18 Speakers in Series Factory service and repair
5. d because the bolts may be tightened fully It is important that recommended baffle openings and mounting bolt locations be followed 8L 81 ONS ISA WANVAdSGNOT LNAINNYLSNI 1 9 FRONT MOUNTING requires a 16 5 8 inch diameter cut out and a 17 3 8 inch bolt circle Drill eight bolt holes 20 round head stove bolts are recommended Length should be inch plus panel thickness if using TEENUTS longer for standard hex nuts If TEENUTS are used 4 20 long shank drill 9 32 inch or 290 diameter letter L drill holes Apply glue to flanges of TEENUTS be fore inserting Hex nuts are not normally used with front mounting due to inaccessibility of back of baffle Tighten bolts evenly More torque may be applied than in rear mounting In front mounting it is necessary to use the segmented foam gasket with adhesive backing Strip off protective paper and apply gasket to the rear mounting surface of the speaker rim making certain that bolt cutouts in the gasket line up with the holes in the speaker frame mount ing surface IMPORTANT When front mounting the bolt head must fit down into the front gasket cutout See Figure 2 Rear mounting requires a 16 3 8 inch diameter cutout and a 17 inch bolt circle Drill eight bolt holes 4 20 round head stove bolts are recommended Length should be inch plus panel thickness if using TEENUTS longer for standard hex nuts If TEENUTS are used 34 20 long shank
6. ed enclosure the 100 watts is capable of flexing your eardrums with 120 dB of sound at four feet Use a properly designed horn load and its capability goes up at least 3 dB overall and up to 10 dB at FEATURES Husky 8 spoke diecast aluminum frame Low mass high efficiency edgewound aluminum voice coil Rugged laminated coil form Heavy duty curvilinear cone Fatigue resistant cone suspension Vented coil and magnet structure Heat radiating back cover bass frequencies The same as doubling your amplifier power Incidentally we don t recommend that you stand in such a sound field permanent ear damage may result What s the result of all this The SRO 18 will turn you on SPECIFICATIONS Nominal Impedance 4 ohms DC Resistance 3 ohms 10 Power Handling Capacity 100 watts continuous sine wave Voice Coil Diameter 2 Magnet Weight 4 lbs 13 oz ceramic Magnetic Structure 16 Ibs EIA Sensitivity Rating 54 dB Dimensions 18 dia x 8 deep Frame Mounting Eight 3 8 holes equally spaced on 17 circle Mounting Dimensions Baffle Opening Front mount 16 5 8 dia Rear mount 16 3 8 dia Mounting Holes Front mount eight 9 32 holes equally spaced on 17 3 8 bolt circle Rear Mount eight 9 32 holes equally spaced on 17 bolt circle Net Weight 22 pounds Shipping Weight 26 pounds INSTALLATION The SRO 18 may be front or rear mounted although front mounting is preferre
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