P1 GE5654 Make HI-FI Affordable User Manual
- June 14, 2024
- P1
Table of Contents
GE5654 Make HI-FI Affordable
User Manual
P1 PRO front and back panel
- ON/OFF 6.
- Bluetooth indicator
- Input switch(among BT/USB/RCA) 7.
- TONE on/off Treble/bass are invalid when off
- Blue/Orange LED switch / OFF
- 3.5 Headphone output interface (RCA output will automatically disconnect when a headphone is connected)
- Bluetooth antenna socket
- PC-USB input interface
- RCA Input interface(Red to rght channel, white to left channel)
- RCA output interface(Red to right channel, white to left channel)
- Power interface (DC 12V)
- Bass adjustment knob
- Main volume control knob
- Treble adjustment knob
Note: Not support headphones with microphones (TRRS port)
Operation steps
- Insert the vacuum tubes into the sockets of P1/P1 PRO. (please check if the pins of tube are deformed)
- Connect active speakers or an amplifier to its RCA output, or a headphone to its 3.5mm jack output.
- Wired input: Connect the audio source (via RCA cable) to the RCA input of P1/P1 PRO; or connect computer (via USB cable) to the PC-USB socket.
- Connect the 12V power adapter to P1/P? PRO and then plug the power cable into the socket, and press the power switch to power on, toggle the input mode switch to the corresponding input position.
- Wireless input: Please toggle the input switch to BT position (there will be blue indicator flashing). Turn on Bluetooth on your phone, search and click to connect, the blue indicator will be steady blue after successful connection.
- Play music on the audio source, adjust the treble/bass and mainvolume according to your preterences and enjoy music.
- After use, please press the power switch to power off first, and then disconnect the power adapter.
PC-USB operation instructions
- Connect the P1/P1 PRO (via original USB cable) to the computer, (USB support hof swapping)
- Toggle the input mode switch to USB mode;
- Right-click on the speaker icon on the lower right corner of computer and it will pop-up a message box, then select the [Playback Devices]
- Select the USB device recognized by computer in the pop-up box;
- Set the [Digital Hifi Audio] as default device.
Parameters
| Audio input | Bluetooth/PC-USB/RCA |
|---|---|
| Audio output | RCA/3.5mm Headphone |
| PC-USB supports maximum sampling rate | 192KHz/24BIt |
| PC-USB Supported operating systems | W7/W8/W10/MAC/linux |
| Headphone matching impedance | 16-300Ω |
| Maximum output power of headphone amplifier | 160mW/32Ω |
| Adjustment range for treble and bass | ±6dB |
| RCA Output level | 2.3V |
| Frequency response | 20Hz-20KHz(t3dB) |
| Input sensitivity | 0.775V |
| Working voltage | DC 12V/ ==1.5A |
| THD | 0.1%(1KHz) |
| SNR | ≥98dB |
| Package weight | 0.88kg/1.94Ib |
| Package dimensions(WD11) | 210’240’60mm/8.27’9.45’2.364n |
FAQ
Q Why are all cables connected but there is no sound?
A: 1. Check the power indicator light of P1/P1 PRO: “Tif it can light up normally, please check if the corresponding input mode is selected. “2: IF it cannot light up, please use another 12V power supply to detect whether the fault is the power supply of P1/P1 PRO. 2. If the indicator light is on but there is no sound, so the power supply is normal. Please continue to check according to the order of audio signal transmission: audio source > audio cable -- preamp/decoder » amplifier -> speaker. 3. If allis fine, please check whether the audio source is muted, paused or the volume is too small.
Q: Why is the sound distorted? How to adjust the treble, bass and main volume?
A: Maybe the input amplitude is too large. If the volume of audio source and P1/P1 PRO both are turned fo maximum, it is easy to cause distortion. Please turn down the volume of audio source or P1/P1 PRO. In general, adjust the volume of amplifier to about 60%, then fine-tune the volume of preamp (distortion will be greatly reduced in this way); the treble and bass ore usually adjusted according to the music style/device types/personal preterence.
Q: Why is there a loud current sound or buzzing sound on the speaker?
A; 1. Please use the original power supply. Many power supplies in the market have interference, which will couse current sound. 2. When using unshielded signal cable in no load, there will be interface signals. Please use the shielded signal cable or unplug It. 3. If there Is sttll noise after eliminating above situations, please confirm whether it is external noise or internal noise. Disconnect ail inputs and only retain power supply and power cable. If the noise disappears, it is trom audio input; If the noise fs siill there, It is possibly caused by power supply or the Internal of P1/P1 PRO.
Q: Can I replace the vacuum tube without tuming off he power?
A: No, because the Inside of P1/P1 PRO is working at high pressure, the vocuum tudes will be burnt out or the P1/PT PRO will be damaged It you plug tubes during Its work.
Q: Why is there o thumping sound when switching on/off?
A: Please confirm the on-off sequence is correct, normally It follows the order of signal transmission when tum on: audio source — preamp / DAC — amplifier -> speaker. (The sequence Is reversed when switching off. As the internal capacitors will be discharged for a while after shutdown. If turn off the preamp firstly and then tum off amplifier, Impact sound will be easily caused which may damage the amplifier or speaker In severe cases).
Q: How does the tube work when the supply voltage of the tube preamp is only 12V?
A: In addition to the high-voltage power supply of transformer, vacuum tubes also use positive and negative voltage supply (it depends on the function of the tube In the circuif}, we also have some products that adopt the step-up power supply.
Q Why is the sound not clear every time the tube preamp starts to be used ?
A: Unlike transistors, vacuum tubes are sensitive components which need to be warmed for a while before entering normal working status. Generally it's better to warm up for about 15 minutes.
Q: Why is there a faint sound even when the volume is turned up to the maximum without tubes?
A: Preamp is for audio signal omplitication, other components such as copacitors of resistors will still produce a weak signal coupling although no tubes ore plugged in. Please install the tube correctly before use.
Q: How long Is the service life of vacuum tubes? Can replace them by myself?
A: The service life of the vacuum tubes is about 4000-4500 hours, they are hot easy to break as long as not damaged by external forces. Before teplacing, please confirm the model that can be replaced.
Q: The commonly used vacuum tubes can be replaced by what models?
A: Commonly used preamp tube can be replaced by: 6/1, 6/2, 6/3, 6/4, 6J5, 6K4, 6° 1N, 6°4N, 6°SN, 5654/5654, 5725, 6AK5, EF9S, 686, 4038, efc.
Q: What should be paid attention to when using tube devices?
A: Vacuum tube Is a high-resistance component, easy to be interfered with, so it should be as far away as possible trom RF interference or electromagnetic interference sources and avoid vibration; The tube will generate heat when working, so It should be well ventilated and heat dissipated.
Q: Can | replace of upgrade the op-amp by myself?
A: Commonly used replaceable op omps: 2604 / 2134 / Muse02, etc. (dual op amps are generally available), different op amps have ditferent sound effects. (According to the actual product models.)
Q: Why is the sound very low when the headphone is connected to the headphone amplifier?
A: Please confirm whether the impedance, plug type and other parameters of headphone are compatible with the headphone amplifier, or whether the input signal is too low.
Q: Why Bluetooth cannot be searched? How to switch to Bluetooth mode?
Q: Why does the Bluetooth playback lag or even disconnect? Why is the Bluetooth background noise/current nolse obvious?
A: Plecse check whether the Bluetooth antenna is installed correctly, whether there is interference of blocking (such as WiFi router / wirelessce telephone / FM radio, etc., since they may be In the same frequency band as Bluetooth, and inductive loads such as fans/refrigerators/air conditioners will also cause some interference), whether the Bluetooth is blocked or foo far away from the device (more than 15 meters).
Q: Can the device be connected to my computer via Bluetooth? Why is there no sound when connected to PC?
A: Compared with phones, computers with poor compatibility and troublesome operations when using Bluetooth. Need the computer with Bluetooth function and to update the driver and set the output device to Bluetooth after connection.
Warning
1. Please do not open the shell by yourself, improper operation may cause a
risk of electric shock.
2. Please use the reguiar manufacturer’s switching power supply, otherwise
there will be the risk of damage to P1/P1 PRO.
3. Please do not change the vacuum tube af will, or it will burn out your
vacuum tube of P1/P1 PRO.
4. Please do not put P1/P1 PRO in a high temperature of humid environment.
5. Headphone output with priority, the RCA output will automatically
disconnect when a headphone is inserted.
6. Default 12V power supply, and P1/P1 PRO will be damaged if the voltage
exceeds 12V.
Contact infornation
Website: www.doukaudio.com
Email: nobsound@doukaudio.com
WeChat/Whatsapp: +86- 17704028602
Address: Room 1329, Wang Cheng Building, Long Guan East Road, long Hua
District, Shen Zhen, Guang Dong, China, 518000
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