Mark IV Electro-Voice FORCE 10 User Manual

a MARK IV company
ratscE'
10 / 12/15
Musical
Instrument
Loudspeakers
SPECIFICATIONS
Nominal Diameter,
FORCE 10: 254 mm (10 in.)
FORCE 12: 305 mm (12 in.)
FORCE 15: 381 mm (15 in.)
Nominal Impedance,
FORCE 10: 8 ohms
FORCE 12: 8 ohms
FORCE 15: 8 ohms
Long Term Average Power Handling
Capacity (per EIA Standard RS-426A),
FORCE 10: 150 watts
FORCE 12: 150 watts
FORCE 15: 150 watts
Sound Pressure Level at 1 Meter, 1 Watt into
Nominal Impedance (using spectrum specified
in EIA Standard SE103 Section SE3),
FORCE 10: 98 dB
FORCE 12: 99 dB
FORCE 15: 100 dB
Usable Frequency Response,
FORCE 10: 75-7000 Hz
FORCE 12: 60-7000 Hz
FORCE 15: 45-6000 Hz
Voice Coil Diameter,
FORCE 10: 63 5 mm (2.5 in.)
FORCE 12: 63.5 mm (2.5 in.)
FORCE 15: 63.5 mm (2.5 in.)
Magnetic Assembly Weight,
FORCE 10: 4.54 kg (10 lb)
FORCE 12: 4.54 kg (10 lb)
FORCE 15: 4.54 kg (10 lb)
Baffle Opening Diameter
(front or rear mounting),
FORCE 10: 229 mm (9 in.)
FORCE 12: 279 mm (11 in )
FORCE 15: 353 mm (13.88 in.)
Overall Diameter,
FORCE 10: 259 mm (10.2 in.)
FORCE 12: 310 mm (12.2 in.)
FORCE 15: 384 mm (15.1 in.)
Overall Depth,
FORCE 10; 122 mm (4 8 in.)
FORCE 12: 130 mm (5 1 in.)
FORCE 15: 163 mm (6 4 in.)
Net Weight,
FORCE 10: 5.44 kg (12 0 lb)
FORCE 12: 5.8 kg (12.8 lb)
FORCE 15: 5.8 kg (12.8 lb)
Frame Composition,
FORCE 10: diecast aluminum
FORCE 12: diecast aluminum
FORCE 15: diecast aluminum
THIELE-SMALL PARAMETERS
*s
Free-Air Resonance Frequency,
FORCE 10: 65 Hz
FORCE 12: 55 Hz
FORCE 15: 40 Hz
Qis
Total Q at fs,
FORCE 10: 38
FORCE 12: 44
FORCE 15: 51
Vas
Volume of Air Having Same Acoustic
Compliance as Driver Suspension.
FORCE 10: 0425 m3 (1.5 ft3)
FORCE 12: 0878 m3 (3.1 ft3)
FORCE 15: .2974 m3 (10 5 ft3)
1 o
Half-Space Reference Efficiency,
FORCE 10: 2 6%
FORCE 12: 2.9%
FORCE 15: 3.3%
vd
Peak Displacement Volume of Diaphragm,
FORCE 10: 104 4 cm3 (6 4 in.3)
FORCE 12: 166.2 cm3 (10 1 in.3)
FORCE 15: 282.2 cm3 (17.2 in.3)
S<j
Effective Diaphragm Area,
FORCE 10: 316.1 cm2 (49 in.2)
FORCE 12: 503.3 cm2 (78 in.2)
FORCE 15: 855.3 cm2 (132.6 in.2)
^max
Peak Linear Displacement of Diaphragm,
FORCE 10: 3.3 mm (.13 in.)
FORCE 12; 3.3 mm (.13 in.)
FORCE 15: 3.3 mm (.13 in.)
Re
DC Resistance of Voice Coil,
FORCE 10: 5.2 ohms ±10%
FORCE 12: 5.2 ohms ±10%
FORCE 15: 5.2 ohms ±10%
DESCRIPTION
The FORCE 10-, 12 . and 15-mch
loudspeakers are designed for professional
high level, high quality musical instrument
and sound reinforcement systems Power
capabilities are 150 watts per EIA Standard
RS-426A
The construction of FORCE loudspeakers
features a tow mass voice coil on a ruggeo
laminated Poly»mide coil form, driven by a
10-lb magnetic structure Also featured are a
heavy duty curvilinear cone and a fatigue-
resistant cone suspension. Both the coil and
magnetic structure are vented All of this is
packaged in a husky eight-spoke diecast
aluminum frame with a heat radiating finned
back cover
FORCE speakers may be front or rear
mounted without an adapter The optional
SMH-1 speaker mounting kit, including
T-nuts and complete instructions facilitates
front mounting.
POWER HANDLING TEST
The FORCE 10, 12 and 15 are designed to
withstand the power test descrived in EIA
Standard RS-426A The EIA test spectrum is
applied for eight hours To obtain the spec¬
trum. the output ot a white noise generator
(white noise is a particular type of random
noise with equal energy per bandwidth n
Hz) is fed to a shaping filter with 6-dB-per-
octave slopes below 40 Hz and above 318
Hz. When measured with the usual constant-
percentage bandwidth analyzer (one-third
octave), this shaping filter produces a spec¬
trum whose 3-dB-down points are at 100 Hz