Telefunken TDA-1 Single Channel Mono Active Direct Box Overview:

The single-channel active TDA-1 phantom powered direct boxes utilize top quality components in a modern take on classic circuitry to deliver a full, rich sound that both complements and retains the natural tone and character of the instrument. By pairing discrete Class-A FET circuitry with a high quality, European-made transformer and a rugged metal enclosure, the TDA DI’s provide exemplary sound quality and reliable performance. The circuit boasts a frequency response of ± 2dB from 20 Hz to 70 kHz with extremely low distortion and self-noise, and each individual unit is manually tuned for the lowest possible distortion figure in TELEFUNKEN’s US facility. This careful attention to detail and high-quality component choices result in a harmonically rich low end and a detailed, open high-end. On the TDA-2, each channel features its own independent -15dB pad, ground lift, and +48V phantom power LED indicator. Every TDA unit is assembled, tuned and tested in Connecticut, USA.

Features

• Custom-wound OEP/Carnhill transformer, made in the UK
  
• Phantom powered class-A discrete FET circuitry
  
• Switchable -15 dB pad and ground lift
  
• All metal construction
  
• Recessed switches and connectors
  
• 100% through-hole components
  
• Assembled, tuned and tested in the USA

Technical Specifications

• Type: Active Direct Box
  
• Frequency Range: 20 Hz – 50 kHz, ±1 dB
  
• Power Source: +48V Phantom Power
  
• Transformer: Custom-Wound OEP/Carnhill
  
• Input Impedance: > 30 kΩ
  
• Output Impedance: < 250 Ω
  
• Maximum SPL (for 1% THD): +3.5 dBV (no pad); +18 dBV (with pad)
  
• Input Connections: 1/4″ Jack
  
• Output Connections: XLR Output, 1/4″ Thru
  
• Dimensions: 100 mm L x 100 mm W x 50 mm H
  
• Weight: 465 g
  
• Included Accessories: Cloth Drawstring Bag