RAAL-requisite: The Official PDT-1a Thread

Our all new standalone headphone amp the PDT-1a features a dedicated OTL circuit design built for traditional non-electrostatic headphones. This top of the line amp delivers uncompromising performance for planar magnetic and dynamic headphones, price is set around $2,000.


  • 6N6P Driver Tubes and a 6AS7 Power Tube

  • Frequency Response: 10Hz-100kHz -3db

  • THD: <1%

  • S/N: 80dB

  • Power: 245mW @50ohms / 180mW @600ohms

  • With Center Tap AC Heaters for low noise



When will this be available?

Looks like it’s available here. I’m not sure if it’s pre-order or available now, the listing is confusing.

The $1900.00 price is enticing :thinking: (Only 2 left it says).

EDIT: Just got a message from Justin at HeadAmp - he says it’s in stock.

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PDT is available now. I just sent headlamp some last week. We have one left here at RAAL-requisite. After that, next shipment arrives April 25.
Best, Danny