Abbingdon Music Research DP-777 Premier Class - Manual (Page 11)

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R1 & R2. Input 1/2: “HD-Valve Digital Input” Digital SPDIF BNC/XLR (switchable):
able to accept standard XLR SPDIF signal of 5Vpp OR BNC standard SPDIF signal of 500mVpp.
R3. Inputs 3 & 4 Digital SPDIF Coax & Optical:
auto-detect standard coaxial RCA standard SPDIF signal of 500mVpp OR Optical standard SPDIF signal.
Note: for the Optical connection, due to bandwidth limitations, we do not recommend its use for Sampling rates of 176/192 kHz.
R4. Input 5 USB: 24/192 Asynchronous USB Input for computer audio source.
R5. Analogue Inputs 6-7: enabled via R6, the DP-777 will function as a high-end Direct-Coupled pre-amplfier.
R6. Mode Selection:
Volume+: Analogue Volume Control and Analogue Inputs are enabled
Volume: Analogue Volume Control enabled but Analogue Inputs are disabled
Bypass: Analogue Volume Control and Analogue Inputs are disabled.
R7. XLR outputs: for the connection of XLR interconnects.
R8. RCA outputs: for the connection RCA interconnects.
R9. Mains voltage selector: to select 115v or 230v mains voltages.
R10. Mains Power: to switch on/off mains electricity to the DP-777.
R11. IEC power connector: for the connection of a mains power cable to the DP-777.
Always power OFF
before changing an
input selection
Direct-Coupled Ana-
logue Volume Control
Optical NOT recom-
mended for 176/192
kHz