Description
The DS-TPSML1A is an active single-pair Format-A sender designed to transmit microphone or line-level audio over twisted-pair cabling. It accepts a balanced XLR input and provides studio-quality preamplification optimized for typical mic and line operating levels. The module supports IEC P24 phantom power for condenser microphones and offers remote powering options.
Key features include switch-selectable mic/line operation, selectable mic gain settings, and switchable assignment to Format-A pairs A, B or C. The unit provides signal and power pair pass-through on both RJ45 jacks to support daisy-chaining of multiple senders. A front-panel blue LED in the XLR connector indicates module power status.
Performance specifications include a frequency response of 20 Hz to 20 kHz (+/- 0.25 dB), THD+N below 0.1% across the audio band, and headroom greater than 18 dB above +4 dBu. Mic gain options are 46 dB (MIC LOW) and 60 dB (MIC HIGH), while LINE is unity gain. Common-mode rejection exceeds 65 dB in mic high settings and is higher in other settings.
Connectivity is via an XLR input and RJ45 Format-A output jacks. The module feeds one selected audio pair and provides passthrough of the power pair and all three audio pairs to downstream modules. Power can be supplied locally via the detachable terminal block or remotely through the twisted-pair cable from compatible Format-A devices.
Typical applications include studio and broadcast microphone feeds, AV installations requiring centralized power and signal distribution, and systems that need low-noise long-distance mic transmission over twisted pair. The module chains with other single-pair or two-pair senders and can be configured to avoid pair conflicts when multiple senders are connected.
Installation is installer-friendly with rear-panel switches for input type, mic gain, phantom power and pair selection. The chassis is available in stainless steel, black or white to match wall-plate aesthetics, and local power is fused to protect connected modules. Overall, the DS-TPSML1A delivers quiet, low-distortion active preamplification for Format-A twisted-pair audio systems.