ACOUSTIC & ELECTRICAL SPECIFICATIONS:
l Nominal Impedance: 49
l Max Amp Power 500 watts*
l Frequency Response 30 Hz - 42,000Hz (E2dB)
l Sensitivity: 87dB (1 watt @ 1 meter)
l Crossover Frequency: 160Hz, 600Hz, 3800Hz
SYSTEM COMPONENTS:
l Cabinet IRS Sigma (Not for Sale)
l Front Grille, w/logo A026-7280
l Lower Rear Grille A026-7354
l Upper Rear Grille A026-7086
l Low-Frequency Transducer: 12”(304mm) Woofer (902-7502),
330709-001
DC Resistance 3.7 ohms E10%
l Mid-Bass Transducer: 6 1/2”(165mm)Mid-Bass Coupler
(902-7379)
DC Resistance 3.6 ohms E10%
l Mid Frequency Transducer: Neodymium Emim
(902-5339A)
DC Resistance 3.7 ohms E10%
l High-Frequency Transducer (2): Emit-B Neodymium
(902-5228)
DC Resistance 3.9 ohms E10%
l Crossover Network Input Assembly (A017-7399)
Woofer Network/Board (A015-7398)
Mid-Bass PCB (A020-7397)
Tweeter/Midrange PCB (A020-7396)
AURAL SWEEP TEST SPECIFICATIONS:
l System Aural Sweep Test 6.0V Input 30 Hz to 42 kHz
l L.F. Aural Sweep Test 6.0V Input 30 Hz to 500 Hz
l M.B. Aural Sweep Test 5.0V Input 100 Hz to 1 kHz
l M.F. Aural Sweep Test 4.0V Input 500 Hz to 4 kHz
l H.F. Aural Sweep Test 2.83V Input 3 kHz to 42 kHz
PHYSICAL SPECIFICATIONS:
l Enclosure dimensions: 58 1/4” x 18 1/2
” x 16-1/4” (H x W x D)
(1422 x 457 x 406mm)
l Weight 195 lbs (88.6 kg) Each
WARRANTY:
l Refer to Warranty Statement packed with each product.
* The maximum recommended amplifier power rating will ensure prop-
er system headroom to allow for occasional peaks. We do not recom-
mend sustained operation at these maximum power levels.
PACKING
SWITCHBOARD PCB
SCHEMATIC
IRS Sigma
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