RDL TX-70A 25V, 70V, 100V Speaker Level Input Interface with Unbalanced Line Output

Turn commercial speaker lines into usable line‑level audio for recording, paging, or monitoring without adding noise or distortion. The Radio Design Labs TX-70A step‑down transformer is a Pro Mass Notification audio interface that accepts 100 V, 70 V or 25 V speaker‑level inputs and delivers a clean unbalanced line output, making it ideal for integrating legacy PA and speaker systems with modern recorders, mixers, or security appliances. The built‑in tri‑mmer lets you precisely adjust output level to match various input voltage/power conditions, while the flat 20 Hz–20 kHz (±0.5 dB) response preserves voice clarity—critical for security, surveillance, and emergency notification. Its passive construction offers galvanic isolation for dependable, low‑maintenance operation, and the compact rack‑mount form factor simplifies deployment in control rooms and AV racks. Use the TX-70A to bridge speaker lines to line‑level inputs in mass notification, access control audio, or monitoring setups—order today to ensure consistent, intelligible audio across your security and surveillance systems.

• Convert 100/70/25V speaker lines to clean line‑level audio for recording, monitoring, or paging systems
• Precise level matching with a built‑in tri‑mmer to prevent clipping and optimize signal-to-noise
• Wideband, accurate audio (20 Hz–20 kHz, ±0.5 dB) preserves voice intelligibility for security and mass notification
• Passive step‑down transformer provides galvanic isolation for reliable, low‑maintenance operation
• Compact, rack‑mountable design simplifies integration into surveillance, monitoring, and AV racks