Pro Audio

HF Products & Components

Spec Sheet


Despite its minute size, the Eminence N151M-8 ring radiator compression driver delivers monumental performance. Utilizing a phase plug design that improves the distribution of forces over the diaphragm surface results in a driver with lower distortion, smoother frequency response, and increased sensitivity as compared to conventional ring radiator designs.

response graph

Click to enlarge.

Suggested Retail  $119.99
Your Price  $89.99

For contiguous USA shipments only.

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High frequency driver specifications
Speaker Detail
Throat Size1", 25.4mm
Nominal Impedance*
Minimum Impedance5.2 ohm @ 6.2 kHz
Power Rating**45 W (AES)
Usable Frequency Range1800Hz-27kHz
Recommended Crossover1.8 kHz @ 12 dBkHz
Magnet MaterialNeodymium
Magnet Weight4.5oz, 0.13kg
Voice Coil Diameter1.5" / 38.1mm
Voice Coil FormerPolyimide
Diaphragm MaterialMylar
DC Resistance (Re)4.1Ω
Mounting Information
Overall Diameter3.6", 91.4mm
Driver Volume Displaced0.008 cu.ft., 0.22 liters
Depth1.45", 36.8mm
Weight1.7 lbs, 0.8 kg
Mounting ThreadN/A
Mounting Holes Diameter2X 1/4-20
Mounting Holes B.C.D.3 in., 76.2 mm

Multiple units exceed published ratings evaluated under EIA 426A specification while tested in a free-air, non-temperature-controlled environment. Multiple compression drivers exceeded published ratings evaluated under EIA-426A or AES specification while mounted on Eminence’s H290, H290S, or H2EA horn in a non-temperature-controlled environment.

The average output across the usable frequency range when applying 1W/1m into the nominal impedance. i.e: 2.83V/8Ω, 4V/16Ω. 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 | Yamaha P3500S amplifier | 2700 cu. ft. chamber with fiberglass on all six surfaces (three with custom-made wedges). Compression drivers were tested using a 2ft x 2ft baffle built into the wall with horn front mounted.

BETA 8CX, 10CX and 12CX are coaxial speakers with tweeter sold separately. The data for these coaxial woofers was calculated with the ASD:1001 driver screwed into the woofer, but not active.

Prices, specifications and product cosmetics are subject to change without notice.