Firestone Fubar III

100 - 240Vac 50/60 Hz external power supply included
External gain switch make it easy to match low or high impedance headphones
Short circuit and thermal protection
1/8" headphone jack
Volume control

Specifications - USB DAC section:

* Digital to Analog Burr Brown PCM2702 DAC, 16 Bit 44.1 KHz / 48KHz sampling rates
* OP Amplifier OPA2604 (socketed and exchangeable)
* Circuit Specifics Independent regulators for digital and analog circuits, DC amp uses no coupling capacitors.
* Frequency Response: 10Hz~25KHz ,-1dB at 600 ohms loading, low noise -99dB(A)

Specifications - Headphone Amp section:

* Class Class AB / DC amplifier, uses no coupling capacitors
* Output Resistance: Extra low output resistance (Zo - 0.05 ohms), high current capacity 800mA per channel.
* Frequency Response: 6Hz~300Khz , -1dB at 32 ohms loading, very low noise -110dB (A)
* Max. output: 6Vrms external gain control switch
* Headphone Impedance: 8 - 600 Ohms (See headphone matching chart above for additional information)
* Size: Size: 11cm/4.3in(L) x 8cm/3.2in(W) x 5cm/2.0in(H)
* Weight: Fubar III only 350g / 12.3oz
* Weight: Total Package 980g / 34.5oz

Opcional: USB Audioquest FOREST