James Loudspeaker ST12-70 - Passive 12" Subwoofer 70V
James Loudspeaker ST12-70 - Passive 12" Subwoofer 70V is backordered and will ship as soon as it is back in stock.
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James Loudspeaker ST12-70 - Passive 12" Subwoofer 70V
Product Overview
The James Loudspeaker ST12 70V is a passive 12" subwoofer wired for 70V operation, built for commercial AV installations that distribute substantial low-frequency reinforcement across long cable runs and multiple zones. Its 12-inch driver delivers deeper bass than the 10-inch ST model on constant-voltage amplifier lines, making this 70V passive subwoofer a fit for larger distributed theaters and venue systems. As a passive sub, it runs from an external 70V subwoofer amplifier. The ST12 70V suits integrators specifying high-output constant-voltage bass.
Product Description
The ST12-70 is part of the James Loudspeaker ST subwoofer family, where the suffix indicates electrical configuration. The 12 indicates a 12-inch driver and the -70 indicates 70V constant-voltage wiring suited to distributed amplifier lines with long cable runs. Because it is passive, the ST12-70 requires an external 70V subwoofer amplifier, leaving power and signal processing under the integrator's control. It is the distribution counterpart to the 4-ohm ST12-4, which shares the same 12-inch driver but is wired for low-impedance operation, and it steps up in displacement from the ST10-70. Within the ST range it scales further to the ST15-70 for the largest rooms. The full lineup is available in the James Loudspeaker collection. This makes the ST12-70 a practical specification for high-output constant-voltage subwoofer systems.
Key Features
- 12-Inch Driver — A single 12-inch woofer delivers deeper output than the 10-inch ST model.
- 70V Configuration — Wired for 70V constant-voltage operation to suit distributed amplifier lines.
- Passive Operation — Driven by an external 70V subwoofer amplifier for full integrator control.
- ST Family Compatibility — Matches other ST subwoofers for consistent multi-zone specification.
- Scalable Range — Specifies cleanly alongside larger ST models for bigger rooms.
Typical Applications
- Distributed 70V low-frequency systems
- Larger commercial AV and entertainment venues
- Multi-zone audio installations with long cable runs
- High-end residential and hospitality spaces
Technical Specifications
| Type | Passive Subwoofer |
| Driver Size | 12" |
| Distribution | 70V |
| Operation | Passive (requires external amplifier) |
Frequently Asked Questions
Does the ST12-70 need an amplifier?
Yes. It is a passive subwoofer and requires an external 70V subwoofer amplifier.
What distribution is it wired for?
It is wired for 70V constant-voltage operation, suited to distributed amplifier lines.
What is the driver size?
The ST12-70 uses a single 12-inch driver.
How does it differ from the ST12-4?
The ST12-4 is the 4-ohm version of the same 12-inch driver, wired for low-impedance operation instead of 70V.
How does it compare to the ST10-70?
The ST12-70 uses a larger 12-inch driver for greater displacement than the 10-inch ST10-70.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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