AUDAC TRM024/B – 70/100V Transformer Module for VEXO206/208, Black is backordered and will ship as soon as it is back in stock.
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What is the AUDAC TRM024/B 70/100V transformer module?
The AUDAC TRM024/B is a 70/100V line transformer module that converts the passive AUDAC VEXO206 or VEXO208 loudspeaker for constant-voltage distributed audio systems. It replaces the standard backplate with an aluminum backplate carrying a copper toroidal transformer, with 240 W, 120 W and 60 W taps. It suits retail, hospitality, houses of worship and multi-purpose rooms where compact VEXO cabinets share a long 70V or 100V line.
How does the AUDAC TRM024/B 70/100V transformer module work?

The TRM series transformers are optional modules for the passive variants of the VEXO series only. To install, the original backplate of the loudspeaker is removed and the TRM024 backplate, with its transformer already integrated, is fitted in its place. This lets a compact VEXO206/B or VEXO208 run on a 70V or 100V line alongside other constant-voltage loudspeakers. At 100 V the module offers 240 W and 120 W taps; at 70 V it offers 240 W, 120 W and 60 W taps, with tap 1 (240 W) available only on 70 V lines. The secondary provides 8 Ω and 4 Ω connections, and the frequency response is 50 Hz – 20 kHz (±3 dB). The amplifier connects to an external 8-pin terminal block, while an internal 3-pin connector links to the loudspeaker. Mounting hardware is included: an M8 x 3.15 in (80 mm) bolt with metal, rubber, flat and spring washers. Drive it from a 70/100V amplifier such as the AUDAC PMQ240. The module is finished in black (RAL9005).
What are the key features of the AUDAC TRM024/B 70/100V transformer module?
- 70/100V conversion — Lets passive VEXO206 and VEXO208 loudspeakers run on constant-voltage speaker lines.
- Three power taps — Selectable 240/120 W taps at 100 V and 240/120/60 W taps at 70 V suit different output levels.
- Copper toroidal transformer — A toroidal core design passes 50 Hz – 20 kHz (±3 dB).
- 8 Ω and 4 Ω secondary — The transformer provides both 8 Ω and 4 Ω secondary connections.
- Backplate replacement — The transformer is integrated on an aluminum backplate that replaces the standard rear panel.
- Terminal block wiring — An external 8-pin terminal block simplifies field wiring to the amplifier.
- Mounting hardware included — Ships with an M8 bolt and washer set for installation.
- 5-year warranty — AUDAC backs the TRM024 with a 5-year manufacturer warranty.
Where is the AUDAC TRM024/B 70/100V transformer module typically used?
- House of worship
- Multi-purpose room
- Commercial meeting space
- Retail, hospitality and sporting facilities
Technical Specifications
| Model | TRM024/B (AUDAC part ADC-TRM024/B) |
| Type | 70/100V line transformer module (backplate) |
| Tap 1 | 20.83 Ω – 100 V: not used / 70 V: 240 W |
| Tap 2 | 41.67 Ω – 100 V: 240 W / 70 V: 120 W |
| Tap 3 | 83.33 Ω – 100 V: 120 W / 70 V: 60 W |
| Impedance | 8 Ω (secondary); 4 Ω (secondary) |
| Connection | External (to amplifier): 8-pin terminal block; internal (to speaker): 3-pin connector |
| Frequency response (±3 dB) | 50 Hz – 20 kHz |
| Construction | Aluminum backplate, copper toroidal transformer |
| Color | Black (RAL9005) |
| Compatible devices | VEXO206, VEXO208 (passive variants) |
| Included accessories | M8 x 3.15 in (80 mm) mounting bolt; Ø 3.54 in (90 mm) metal washer; rubber washer; M8 washer; M8 spring washer |
| Warranty | 5 years |
Frequently Asked Questions
Which loudspeakers is the TRM024/B compatible with?
AUDAC lists the VEXO206 and VEXO208, passive variants only, including the VEXO206/B.
How is it installed?
Remove the standard backplate from the VEXO loudspeaker and replace it with the TRM024 backplate, which has the transformer integrated. AUDAC provides an installation manual.
Which taps are available?
At 100 V: 240 W and 120 W. At 70 V: 240 W, 120 W and 60 W. Tap 1 (240 W) is not used on 100 V lines.
What amplifier should I use?
Any 70V or 100V commercial amplifier with enough capacity for the total tapped load, such as the AUDAC PMQ240.
Is a white version available?
AUDAC lists the TRM024 in a black version (TRM024/B). Contact us if your project needs a different finish.
What warranty does it carry?
AUDAC lists a 5-year manufacturer warranty for the TRM024.
Can Creation Networks help design a 70V system?
Yes. We calculate tap settings and amplifier loads and install distributed audio systems nationwide. Call (888) 230-3661 or browse the full AUDAC collection.
At Creation 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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