Pro Audio

Professional Series

Get Adobe Reader Cab Design Spec Sheet

KILOMAX® PRO 18A

Recommended for professional audio subwoofer and woofer applications in sealed and vented enclosures. Not for horn-loading or scoops.

response graph
 
Find a Dealer This table charts the specifications for the KILOMAX® PRO 18A speaker
Speaker Detail
Specification
Nominal Basket Diameter18", 457 mm
Nominal Impedance*8 Ω
Power Rating**
Watts1250 W
Music Program2500 W
Resonance32 Hz
Usable Frequency Range33 Hz - 0.3 kHz
Sensitivity***95.8 dB
Magnet Weight109 oz.
Gap Height0.375", 9.5 mm
Voice Coil Diameter4", 102 mm
Thiele & Small Parameters
Resonant Frequency (fs)32 Hz
DC Resistance (Re)5.07 Ω
Coil Inductance (Le)1.59m H
Mechanical Q (Qms)10.15
Electromagnetic Q (Qes)0.49
Total Q (Qts)0.47
Compliance Equivalent Volume (Vas)331.5 liters / 11.71 cu.ft.
Peak Diaphragm Displacement Volume (Vd)1159 cc
Mechanical Compliance of Suspension (Cms)0.18 mm/N
BL Product (BL)17.2 T-M
Diaphragm Mass Inc. Airload (MMs)143 grams
Efficiency Bandwidth Product (EBP)65
Maximum Linear Excursion (Xmax)10 mm
Surface Area of Cone (Sd)1159 cm2
Maximum Mechanical Limit (Xlim)19.2 mm
Mounting Information
Recommended Enclosure Volume
Sealed 104.8-172.7 liters / 3.7-6.1 cu.ft.
Vented 118.9-303 liters / 4.2-10.7 cu.ft.
Driver Volume Displaced0.234 cu.ft. / 6.62 liters
Overall Diameter18", 457.2 mm
Baffle Hole Diameter16.56", 420.6 mm
Front Sealing GasketYes
Rear Sealing GasketYes
Mounting Holes Diameter0.28", 7.1mm
Mounting Holes B.C.D.17.25", 438.2mm
Depth8.15", 207 mm
Net Weight27.4 lbs, 12.43 kg
Shipping Weight30.9 lbs, 14.02 kgs
Materials of Construction
Coil ConstructionCopper voice coil
Coil FormerKapton former
Magnet CompositionFerrite magnet
Core DetailsExtended core with Core Periphery Ventilation
  
Basket MaterialsDie-cast aluminum basket
Cone CompositionTreated Paper-Kevlar
Cone Edge CompositionCloth cone edge
Dust Cap CompositionPorous cloth top spider/ heatsink
Hide
Footnotes

* Please consult www.eminence.com for specifications of models with alternative impedances.

** Multiple units exceed published rating evaluated under EIA 426A noise source and test standard while in a free-air, nontemperature-controlled environment.

*** The average output across the usable frequency range when applying 1W/1m into the nominal impedance. ie: 2.83 V /8 ohms, 4 V /16 ohms. Eminence response curves are measured under the following conditions: All speakers are tested at 1W/1m using a variety of test set-ups for the appropriate impedance | LMS using 0.25" supplied microphone (software calibrated) mounted 1m from wall/baffle | 2 ft. x 2 ft. baffle is built into the wall with the speaker mounted flush against a steel ring for minimum diffraction | Hafler P1500 Trans-Nova amplifier | 2700 cu. ft. chamber with fiberglass on all six surfaces (three with custom-made wedges).

**** BETA 8CX, 10CX, 12CX and ACOUSTINATOR™ CX 2008 are coaxial speakers with tweeter sold separately. Published Usable Frequency response contingent upon use of APT 50 HF Driver.

***** Multiple units exceeded published rating evaluated under AES 500 and AES 800 noise sources and test standards while mounted on Eminence's TI-2000 horn in a nontemperature-controlled environment.

****** The average on axis output across the entire usable frequency range when applying 1W/1m into the nominal impedance while mounted on a Community SH 494 horn measured with: LMS (software calibrated) using a 0.25" [6.4mm] supplied microphone mounted 1m from horn mouth, Hafler P1500 Trans-Nova amplifier, 2700 cu.ft. chamber w/fiberglass on all six surfaces (three with custom made wedges). Plane-wave tube response and impedance curves measured with LMS on a 0.75" [19.1mm] diameter tube with adapter to allow for smooth transition to throat diameter and 1W/1m into nominal impedance. Prices and Specifications Subject to Change Without Notice.