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18.3 Headphones
The channels Phones of the HDSPe AIO Pro are available via an 1/4" TRS jack (stereo output).
The High Power² output easily drives low impedance headphones. The output's volume is ad-
justed via TotalMix. Additionally, the Settings dialog provides the level settings Hi-Power (equals
+19 dBu @ 0 dBFS) and Lo-Power (equals +7 dBu @ 0 dBFS).
These outputs represent ideal headphone
outputs. Eventually as technically they are
also ideal line outputs.
In case the headphone output should operate
as Line output, an adapter TRS plug to RCA
phono plugs, or TRS plug to TS plugs is re-
quired.
The pin assignment follows international
standards. The left channel is connected to
the tip, the right channel to the ring of the
TRS jack/plug.
With an output impedance of 0.1 ohms, 730 mW per channel into 32 ohms at THD+N of 97 dB,
the High Power² headphone output offers excellent technical data. With high impedance head-
phones (300 Ohm) very high 160 mW per channel at -105 dB THD+N are achieved. Switching to
Lo-Power reduces the audible background noise of very sensitive headphones. Together with a
mute relay for click-free switching on and off, the HDSPe AIO Pro offers an extremely high-
quality headphone output directly within the computer.
19. Digital Connections
19.1 ADAT
The ADAT optical I/O of the HDSPe AIO Pro is fully compatible to all ADAT equipped units.
RME's unsurpassed Bitclock PLL prevents clicks and drop outs even in extreme varipitch opera-
tion, and guarantees a lightning fast, yet low jitter and sample accurate lock to the digital input
signal. A usual TOSLINK cable is sufficient for connection.
ADAT In
Interface for a device sending an ADAT signal to the HDSPe AIO Pro. Carries the channels 1 to
8. When receiving a Double Speed signal this input carries the channels 1 to 4, at Quad Speed
channels 1 and 2. Can also be used as SPDIF optical input.
ADAT Out
Interface for a device receiving an ADAT signal from the HDSPe AIO Pro. Transmits channels 1
to 8. When sending a Double Speed signal, this port carries channels 1 to 4, with Quad Speed
channels 1 and 2. Can also be used as SPDIF optical output.
User's Guide HDSPe AIO Pro © RME
35
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