RAAL PDT-1a
An OTL tube amp from RAAL - for convential dynamic and planar driver type headphones.
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RAAL-requisite PDA-1a
Tube headphone amplifier for planar-magnetic and dynamic headphones
Tube headphone amplifier for planar and dynamic driver headphones – not suitable for ribbon headphones.
RAAL-requisite’s new standalone headphone amplifier, the PDA-1a, incorporates the technology of the groundbreaking HSA-1b and is a completely new amplifier for traditional, non-electrostatic headphones. This top-tier amplifier delivers uncompromising performance for planar-magnetic and dynamic headphones.
Technical Specifications
| Load Impedance | 0.03 ohm – infinity |
| Output Power | 8-ohm 12 W, 16-ohm 6 W, 32-ohm 3 W, 64-ohm 1.5 W, 120-ohm 0.75 W, 240-ohm 0.35 W |
| Frequency Response | 100mv/ in/sin 15hz-500kHz |
| Power Bandwidth | 100kHz (-3dB) at 1khz |
| Distortion (THD) | < 0.5% at 1khz |
| S/R | > 90dB |
| Max. Power Consumption | 150W, 25W without signal |
| Dimensions | H3.54" x W8.58" x D12.6" |
| Weight | Approx. 5.5kg |
Inputs and Outputs
| Load Impedance | 0.3 ohm – infinity at the headphone outputs |
| Input 1 | 2 RCA single-ended connectors |
| Input 2 | 2 XLR 3-pin balanced (female) |
| Headphone Outputs (Balanced) | 2 x 4-pin XLR sockets (balanced headphone output for planar & dynamic) |
| Headphone Outputs (Single-Ended) | 2 x 6.3 mm stereo jack (single-ended planar and dynamic headphone output) for 20 - 600Ω |
| Input Impedance | 40k Ω |
| Sensitivity | 0.5V /40k Ω |
| Operating Voltage | 115V/230VAC (selector switch) or 100V |
