ST21

Subterranean

The ST21-4 is a 21" subterranean subwoofer designed for high SPL bass output in outdoor environments. It features a powerful 21" transducer, optimized for maximum excursion and SPL, delivering exceptional low-end performance for outdoor audio applications.

ST21

Key Features
Specifications
Related Products
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Key Features

All-copper toroidal transformer (70V models)
Direct burial, compression bandpass subwoofer design
Marine grade
Available in a selection of standard or custom colors
TAA Compliant

Specifications

SKU

ST21

Speaker Woofer

(1) 21" (534mm) Aluminum

Frequency Response (+/- 3db)

18Hz - 120Hz

Sensitivity

91dB (2.83V/1m)

Enclosure

Aluminum

Nominal Impedance (Ohms)

4 ohms

Dimensions (WxHxD)

24.0" x 24.0" x 24.0" (609.6mm x 609.6mm x 609.6mm)

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Related Products

Downloads

Sales & Data Sheets

ST21_JAMES_Data_Sheet.pdf

James Standard Colors and Upgraded Finishes.pdf

Tech Note_JAMES_Landscape_System_Output_Bass.pdf

Instructions

Subterranean_JAMES_Installation_Guide.pdf

Drawings & Images

ST21_JAMES_cad_file.pdf

ST21_JAMES_cad_file.DWG

Ease Files & Speaker Presets

Sonance DSP Speaker Presets_Sonance DSP_SpeakerPresets.zip

PowerZone Connect Speaker Preset Library_BlazebySonance_SpeakerPresets.zip

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