P4
- Is the P4 pre-out jack controlled by the volume control and power knob?
- How to hook up P4 with V3?
- How can I open the P4 to replace the op-amp?
- What is the supplied op-amp with the P4?
- What can the pre-out port be used for?
- What are the benefits of the high-precision motorized analog potentiometer in the P4?
Q4
GR40
ZD3
- Can the Fosi ZD3 be used on Windows 7? If so, where can I download the driver?
- When I connected it to the PC via USB, the rate was fixed at 48kHz and 24bit.
- Is the included trigger cable with mini mono or stereo plug?
- How to replace the op-amps?
- Why can't the system volume be adjusted when the ZD3 is connected to a computer or smartphone via USB?
- Does the ZD3 support auto-sleep mode when no signal is transmitted?
V3 MONO
- The V3 Mono has three op-amps. What does each one do? And if l want to get abetter sound, which one should l change?
- What is the input voltage of the included power supply, and can it be used in my country?
- How are you synchronizing the TPA3255 oscillator between the monoblocks in order to avoid Class D "Beat Tones" ?
- What is the input impedance of the V3 Mono?
- A KOL pointed out that the V3 Mono runs really hot to the toúch. ls that a safety concern?
- If you use a single 48V/10A power supply to power two V3 Mono devices simultaneously, compared to using two separate 48V/5A power supplies for each V3 Mono, will the output power be the same? Will there be any changes in other parameters?
ZA3
- What's the input sensitivity of the ZA3?
- How many op amps should l change in ZA3?
- How to set up a system using two ZA3 units in mono mode?
- Which opamps do you recommend for the most excellent results?
- Connecting powered Subwoofer to ZA3s in Monoblock Mode: Does It Matter Which ZA3?
- If I don't have a source trigger, do I need to turn off each amp using the knob?
SK02
- DSD File Playback Indicator Not Lighting Up
- PCM File Playback Indicator Not Changing
- Compatibility with Windows 7
- Windows 11 can't find driver for SK02 DAC
- Does the SK02 support microphone input on the 3.5mm jack for headsets?
- SK02 Compatibility with PS5/4 and Xbox
BT20A PRO
- How to change Op-Amps?
- Do I use a mono or stereo mini plug to RCA cable from the pre-amp outlet to the subwoofer?
- Connecting Headphone Preamp to Pre-Out
- Replacing the Volume Knob
- Power Output with Various PSUs
- Hum in Subwoofer
DS1
BT30D PRO
- I connect to the Pre-Out from the amp to the LFE on the powered Polk PSW110 subwoofer. But there is no sound.
- The differences in terms of BT30D and BT30D PRO’s Sub out and Pre out functionality.
- Power Output with Various PSUs
- What type of DC-plug I need to buy for power supply?
- Can I use different impedances in each part? Like 4ohms in the stereo output and 8ohms in the subwoofer output?
- Only one port on the powered sub.
V3
- Which op-amps are compatible?
- Power Output with Various PSUs (Refer to the image below)
- Low volume on V3
- V3 amp connected to a new turntable with RCA cables, the sound coming out of the system is faint.
- I did not receive a copper color knob, just a black one.
- How much supply voltage go through each of 2 OpAMP on V3 circuit by a multimeter?
TB10D
Q5
DS2
BT20A
- Switching Between AUX and Bluetooth on BT20A
- If I have a stereo receiver connected to the RCA input of this amplifier will it let me connect to the amplifier using Bluetooth?
- Can you control the volume from a tablet or phone via bluetooth connection as I do not want to walk to the device to alter the volume.
- Can I hard wire this unit directly into a 12V car system?