Electro-Voice Models SP-15 (and SP15B) are massive, 15-inch reproducers of deluxe construction. They offer outstanding performance as full-range loudspeakers or as low-frequency drivers in mutiway systems. The EV Radax coaxial principle employed in these speakers offers as extended high-frequency response beyond the normal capability of ordinary 15-inch loudspeakers; and the combination of outstanding magnetic structure, edgewise wound voice coil, and viscous-damped cloth cone suspension makes possible an unusually low cone resonance and extended low-frequency response.
The Model SP15 incorporates an exclusive E-V circuit which dramatically improves high-frequency response through control of speaker impedance at high frequencies. Action of this unique circuit and adjustment of the speaker's high-frequency response is determinate by the setting of an auxiliary brilliance control.
SP15 Brilliance Control
Since the Model SP15 was introduced several years ago, a number of improvements have been made in its design. Among the most effective is the additions of a brilliance control to allow adjustment of the speaker's high-frequency response to individual taste and room acoustics. The best guide to setting this control properly is, of course, a familiarity with the sound of live music. Acoustically "hard" or "live" rooms will require a retraed setting of the brilliance control to compensate for the greater amount of high-frequency reflection. In "soft" or "dead" rooms with soft furniture, carpeting, and draperies a more advanced setting of the high-frequency control will normally be required.
Specifications
Frequency Response: 25 - 15,000 Hz
Impedance: 8 Ω
Power Handling Capacity
Program : 40 watts
Peak : 80 watts
Voice Coil Diameter: 2,5 -inch
Magnet Weight: 4 lb 10 oz
Magnet Material: Ceramic
Nominal Cone Resonance: 25 Hz
Mechanical Crossover: 3500 Hz
EIA Sensitivity Rating: 53 dB
Dimensions
Diameter : 15-1/8" (8-1/4: d. overall)
Mounting: 14-7/16" diameter (four 1/4" holes equally spaced on circle)
Baffle Opening: 13-1/2"
Net Weight: 25 lbs
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