Related Manuals for ECdesigns PowerDAC-RX
Summary of Contents for ECdesigns PowerDAC-RX
- Page 1 PowerDAC-RX User Guide 1 19 © 1990-2023 - All Rights Reserved - ECdesigns...
- Page 2 Introduction The PowerDAC-RX is a discrete power multi-bit DA converter without -any- amplifiers or buffer circuits in the signal path. PowerDAC-RX has integrated lossless volume control. Balanced programmable linear power-supply, bit shifts and resistor attenuator are used to generate the output signal.
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Page 3: Block Diagram
Block diagram 3 19 © 1990-2023 - All Rights Reserved - ECdesigns... - Page 4 The end result is an accurate and clean multi-bit power DA converter with low enough output impedance to directly drive the outputs. This way all lossy analogue circuits and related unavoidable degrading, typically required for conventional DACs can be avoided. 4 19 © 1990-2023 - All Rights Reserved - ECdesigns...
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Page 5: Technical Specifications
Volume 0 … 24, - = stand-by, P = bit perfect test passed. PowerDAC-RX and The PowerDAC-RX makes it possible to directly drive many headphones (32 Ohm and up) without any analogue amplifier or buffer in the signal path. In other words the headphones headphones are directly driven by a balanced power supply, a number of digital on / off... - Page 6 -7.5 dB 20 884 mV rms -6 dB 21 1.05 V rms -4.5 dB 22 1.25 V rms -3 dB 23 1.48 V rms -1.5 dB 24 1.77 Vrms 0 dB 6 19 © 1990-2023 - All Rights Reserved - ECdesigns...
- Page 7 PowerDAC-RX PAGE 3 Integrated bit- With muting on (display:"-") and using supplied bit-perfect test wav files, the display will show "P" when test wav file is received by the PowerDAC-RX without perfect tester modification. Auto-mute When no Toslink data is received the PowerDAC-RX will switch to muting after about 15 minutes.
- Page 8 Bit-perfect test It is essential to test if the Toslink source that is connected to the PowerDAC-RX is setup to pass music without any alterations. Alterations of original music data could cause serious SQ degradation ! WHEN SOURCE IS NOT BIT-PERFECT PLAYBACK THROUGH POWERDAC AND OTHER DACS WILL NOT REPRODUCE THE MUSIC AS INTENDED ! Alteration to original (CD) recordings could have numerous causes e.g.
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Page 9: Jumper Settings
Jumper settings Disconnect the mains power cable from the PowerDAC-RX ! In order to access the jumpers, remove the PowerDAC-RX TOP cover by removing 6 x 2mm hex bolts. Carefully remove or place jumpers using tweezers. When replacing the top cover, make sure side, rear and front panels lock into the top cover slots correctly before tightening the 6 hex bolts. -
Page 10: Firmware Update
Use tweezers to set the red jumpers on rear of PowerDAC-RX to PROGRAM configuration (see Jumper settings on previous page). Download and unzip latest pdrs-firmware.zip Now connect a USB cable from the PowerDAC-RX to your computer and start the STM32CubeProgrammer. 10 19 © 1990-2023 - All Rights Reserved - ECdesigns... - Page 11 Press the OK button on message window. Finally click on the Disconnect button to finish session. You can then close the STM32CubeProgrammer. Remove the USB cable between PowerDAC-RX and PC. Set jumpers to the normal positions. After power-up PowerDAC-RX the new firmware is used.
- Page 12 Use tweezers to set the red jumpers. to PROGRAM configuration (see Jumper settings on page 9). Now connect a USB cable from the PowerDAC-RX to your computer. Now copy the firmware file (see page 10) e.g. PDRS140.bin into the same directory containing the dfu-util executable.
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Page 13: Ir Remote Control
• Decrease volume • Mute/Un-mute The IR Remote Control can be recharged with the included USB mini cable. Connect to a 5V source like PC or 5V USB charger to charge. 13 19 © 1990-2023 - All Rights Reserved - ECdesigns... - Page 14 UT192 (Optical + ElectroTos output) The UT192 is an optional high-speed USB to Toslink converter that can be used with the PowerDAC-RX or other Toslink DACs. It supports USB high-speed: 44.1kHz / 48kHz / 88.2kHz / 96kHz / 176.4kHz / 192kHz The UT192 is based on the XMOS processor.
- Page 15 RF ground loop noise and very large bandwidth noise in general. ElectroTos offers low jitter, blocks RF ground loop noise and offers a clean, band-limited output signal. 15 19 © 1990-2023 - All Rights Reserved - ECdesigns...
- Page 16 We use a combination of fixed voltages + bit shifts (max 4) to change the volume. Bit shifts only drop bits from the 4 least significant bits. We use 9 voltages in combination with up to 4 bit shifts in the PowerDAC-RX giving a total of 25, 1.5 dB volume steps.
- Page 17 If you are looking for simple music player for stand-alone or even multi-room to use with the PowerDAC-RX checkout piCorePlayer. When run from an RPI4 you could connect your music to the RPI4 directly by USB or to NAS via network.
- Page 18 If you use playback software with our PowerDACs and you have successfully run bit-perfect test (44.1, 48, 88.2 and 96) please let us know so we can update bit-perfect player software here. 18 19 © 1990-2023 - All Rights Reserved - ECdesigns...
- Page 19 If you use playback hardware with our PowerDACs and you have successfully run bit-perfect test (44.1, 48, 88.2 and 96) please let us know so we can update bit-perfect player hardware here. 19 19 © 1990-2023 - All Rights Reserved - ECdesigns...