American Standard Series
Recommended for pro audio and bass guitar applications as a midrange. Sealed basket makes this woofer independent of enclosure design.
|Nominal Basket Diameter||8", 203 mm|
|Nominal Impedance*||8 Ω|
|Music Program||250 W|
|Usable Frequency Range||400 Hz - 4.8 kHz|
|Magnet Weight||20 oz.|
|Gap Height||0.25", 6.4 mm|
|Voice Coil Diameter||1.5", 38 mm|
|Thiele & Small Parameters|
|Resonant Frequency (fs)||514 Hz|
|DC Resistance (Re)||7.32 Ω|
|Coil Inductance (Le)||0.34m H|
|Mechanical Q (Qms)||4.48|
|Electromagnetic Q (Qes)||2.08|
|Total Q (Qts)||1.42|
|Compliance Equivalent Volume (Vas)||0.8 liters / 0.03 cu.ft.|
|Peak Diaphragm Displacement Volume (Vd)||0 cc|
|Mechanical Compliance of Suspension (Cms)||0.01 mm/N|
|BL Product (BL)||8.9 T-M|
|Diaphragm Mass Inc. Airload (MMs)||7 grams|
|Efficiency Bandwidth Product (EBP)||247|
|Maximum Linear Excursion (Xmax)||1.6 mm|
|Surface Area of Cone (Sd)||205.9 cm2|
|Maximum Mechanical Limit (Xlim)||3. mm|
|Recommended Enclosure Volume|
|Vented||- liters / - cu.ft.|
|Driver Volume Displaced||0.02 cu.ft. / 0.58 liters|
|Overall Diameter||8.22", 208.8 mm|
|Baffle Hole Diameter||7.19", 182.6 mm|
|Front Sealing Gasket||Yes|
|Rear Sealing Gasket||Yes|
|Mounting Holes Diameter||0.22", 5.6mm|
|Mounting Holes B.C.D.||7.78", 197.6mm|
|Depth||3.25", 82.6 mm|
|Net Weight||4.4 lbs, 2 kg|
|Shipping Weight||5.1 lbs, 2.31 kgs|
|Materials of Construction|
|Coil Construction||Copper voice coil|
|Coil Former||Polyimide former|
|Magnet Composition||Ferrite magnet|
|Core Details||Vented core|
|Basket Materials||Pressed steel basket with closed back|
|Cone Composition||Paper cone|
|Cone Edge Composition||Paper cone edge|
|Dust Cap Composition||Solid composition paper dust cap|
* 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.