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Selenium by JBL ST400 BLK Super Tweeter

MSRP: $99.99
(You save $10.00 )
Usually Ships in 24 Hours
$10.00 (Fixed Shipping Cost)

Selenium by JBL ST400 BLK Super Tweeter

MSRP: $99.99
(You save $10.00 )

The Selenium by JBL ST400 is a super tweeter for outstanding detail and clarity in high-frequencies without harshness. The ST400 may be used individually in lower power systems or arrayed for increased coverage and SPL in higher power systems and is equipped with quick coupling connectors. The base and diffuser are constructed of aluminum which contributes to better heat dissipation. The bullet-shape horn design offers a longer throw 40 x 40 degree dispersion. The phenolic annular diaphragm is long-lasting, cost effective and more natural-sounding than metallic diaphragms. The use of high-temperature materials and adhesives improves power handling and produces exceptionally high acoustic output. A precisely engineered diaphragm structure and alignment mechanism for easy, reliable, cost effective repair in case of diaphragm failure.


  • Power Handling: 150 watts RMS/300 watts max

  • RMS Power Using Crossover (Active/Passive): NBR 10.303 (HPF 5.000 Hz 12 dB/oit): 100W / NBR 10.303 (HPF 8.000 Hz 12 dB/oit): 150W 

  • Music Program Power Using Crossover (Active/Passive): (HPF 5.000 Hz 12 dB/oit): 200W / (HPF 8.000 Hz 12 dB/oit): 300W

  • Nominal Impedance: 8 ohms 

  • Voice Coil Diameter: 42mm

  • Frequency Response: 4,000-20,000 Hz 

  • SPL: 111 dB 2.83V/1m

  • DC Resistance: 6.2 ohms 

  • Voice Coil Winding Length: 2.2 meters

  • Voice Coil Winding Depth: 2.0mm

  • Sound Dispersion (H x V): 40 x 40 degrees

  • Diaphragm Material: Phenolic

  • Flux Density: 1.7 T

  • Volume Displaced by Tweeter: 0.6 I

  • Magnet Weight: 470g

  • Net Weight: 1690g

  • Connectors: Quick Coupling

  • Front Baffle Cutout Diameter: 106mm

  • Depth: 87mm

  • Magnet Diameter: 102mm

  • Magnet Height: 14mm

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within two-three weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

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