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Subwoofers hand built to order in the USA

EM 2.5k 18 – 18″ 2,500W RMS Subwoofer

$890.00

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Design my box for this sub →Free enclosure advisor — sealed or ported volume, tuning, slot or aero ports, response curve and a cut sheet for your vehicle.

Measured T/S Fs 30.95 Hz·Qts 0.6265·Vas 264.4 L All specs →

EM Audio’s 18″ daily driver: 2,500W RMS with a 420 oz triple-stack vented motor, a 3″ 8-layer American-made aluminum flat-wound coil in dual 2 or dual 1 ohm, and over 3″ of excursion. Hand built to order in the USA.

Ohm / Coil Selection
Carbon Fiber Dustcap Upgrade
Spider Upgrade
Carbon Fiber Cone Upgrade

Custom Color Options

Custom Frame & Dustcap Color

Your dustcap is matched to the frame color.

Custom Logo Text (On Dustcap)

Any other details we should know about your order (optional).

1-year warrantyOn every EM Audio subwoofer
Hand built to order in NCAllow a minimum of 15 business days
Pay over timeAffirm, Afterpay and Snap at checkout
Recone kits for every modelA blown sub is a rebuild, not a replacement
SKU: usa2.5k-18 Categories: , Tag:

Description

The EM 2.5k 18 is our daily low-end monster. It handles 2,500W of continuous power and over 10,000W on burps, with enough motor force for daily, SQL and SPL use. A vented pole and direct vent cooling keep temperatures under control, 10″ progressive spiders keep the moving assembly under mechanical control, and a stitched Mega roll surround holds everything together at extreme excursion. The aluminum Ti frame is designed for high excursion, airflow and clearance.

Highlights

  • 2,500W RMS continuously rated; over 10,000W on burps
  • Over 3″ of excursion (38 mm one-way)
  • 3″ 8-layer American-made aluminum flat-wound PE coil, dual 2 or dual 1 ohm
  • 420 oz triple-stack, heavily vented motor with channel pole cooling and vented backplate
  • 10″ progressive spider pack, 3-layer
  • Stitched Mega roll surround
  • Black poly dust cap with 2-tone EM Audio logo
  • Triple XL leads and 4 ga. push terminals
  • Stainless steel hardware and lock washers
  • Ti frame in standard gray

Specs

  • Mounting depth: 12″
  • Motor width: 8.75″
  • Cutout diameter: 16.75″
  • Outside diameter: 18.5″
  • Motor weight: 48 lbs

Recommended enclosure

Sealed: 3.5–4.0 cu ft. Ported: 5.0–6.0 cu ft, tuned to 32 Hz. 4th and 6th order friendly. These sizes are for rated power. If you compete or run over rated power, work with your box designer, or run the numbers in our box calculator.

Every EM Audio subwoofer is hand built to order in North Carolina. Custom orders take a minimum of 15 business days to build and are final sale. Custom powder-coat frame and dustcap colors, a stiffer spider pack, direct 8 ga. OFC leads and custom dustcap logo text are available as options above. Real carbon fiber dust caps are in Dust Caps. Recone kits are available for every model we make, so a blown sub is a rebuild, not a replacement.

Measured T/S parameters

Fs 30.95 Hz
Qts 0.6265
Qes 0.7349
Qms 4.246
Vas 264.4 L (9.338 cu ft)
Re 4.174 Ω
Le 2.361 mH at 10 kHz
BL 17.18 T·m
Mms 267.2 g
Cms 0.099 mm/N
Sd 1380 cm² (16.5″ piston diameter)
Sensitivity 92.17 dB 1W/1m · 95 dB 2.83V/1m

Measured in free air on a Dayton Audio DATS with the coils wired as tested (see Re). Treat these as a starting point: every sub is hand built, and upgrades change the numbers. A stiffer spider pack raises Fs, and carbon fiber upgrades lighten the moving assembly, which also raises Fs and lowers Qts. Run them through our box calculator, or ask us for numbers on your exact build.

EM 2.5k 18 measured Thiele/Small parameters

Additional information

Weight 51 lbs
Dimensions 20 × 20 × 24 in

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