TOPPING TP234 D90 III Discrete Desktop DAC

FAQ

• Q: What should I do if I encounter interference issues?
  • A: If you experience interference, try repositioning the product or adjusting the settings to minimize disruptions. Refer to the FCC warning section for guidance.

Contents list

• D90 III Discrete / x1
• Remote control / x1
• USB cable / x1
• AC cable / x1
• Bluetooth antenna / x1
• Product Information Card / x1

Note: You can download the driver on https://www.toppingaudio.com/downloads.

Attribute

USB IN

| PCM       44.1kHz-768kHz/16bit-32bitDSD

DSD  64-DSD512 (Native), DSD64-DSD256 (DoP)

PEQ        44.1kHz-192kHz/16bit-24bit

---|---

IIS IN

| ****

PCM       44.1kHz-768kHz/16bit-32bitDSD

DSD  64-DSD512 (Native), DSD64-DSD256 (DoP)

COAX/OPT/AES IN

| PCM       44.1kHz-192kHz/16bit-24bit DSD  DSD64 (DoP)

PEQ        44.1kHz-192kHz/16bit-24bit

BTIN

| ****

AAC/SBC/APTX/APTX HD/APTX-Adaptive/LDAC
PEQ 44.1kHz-96kHz/16bit-24bit

Front panel

Rear panel

XLR OUT

1. Multifunction button
2. OLED screen
3. Remote control receiver
4. Volume knob
5. Right channel balanced XLR output
6. Left channel balanced XLR output
7. Left channel single-ended RCA output
8. Right channel single-ended RCA output
9. IIS input
10. Coaxial SPDIF input
11. Optical SPDIF input
12. Bluetooth input
13. USB input
14. AES input
15. 12V Trigger IN/OUT (3.5mm jack)
    • The 12V Trigger IN/OUT allows the D90 111 Discrete to be activated by other devices or to activate other devices via a 3.5mm AUX cable. The upstream device connected to Trigger In can control the power on/standby of D90 III Discrete, and the downstream device connected to Trigger Out can be controlled by D90 III Discrete.
    • Before using the Trigger IN function, you need to press the button on remote to set auto power on&standby mode to “AUTO: TRG”.
16. Power input (AC 100-240V 50Hz/60Hz)
17. Power switch

Display

1. Input
2. Output
3. Current sampling rate
4. Volume
5. PCM/DSD format indication

Remote control

With the Bluetooth remote control, you can control D90 Ill Discrete from a distance. you can adjust the volume, switch input channels, filter settings and more.

Pairing Bluetooth remote control

1. Install two AAA batteries (not included) for the remote control.
2. Connect to the power connector with the attached power cord, turn on the unit.
3. Press and hold middle button and C2 button until the red light flashes.
4. Press and hold the knob until the display shows Pairing …
5. Wait for a while, the display shows Paired which means the pairing has succeeded.

The display shows Unpaired which means the pairing has failed, please repeat the above steps.

Note: Step 2 will clear all Bluetooth connections, including the phone’s Bluetooth connection.

C1 C2

• Operation: Press and hold the C1 /C2 button for 3 seconds to save the current settings, and “C1 SAVED” or “C2 SAVED” will be displayed after successfully saving. Short press the C1/C2 button to use the corresponding settings.
• What was saved: Volume and all settings in the setup menu, such as input channel, output channel, gain, etc.
• When to use: This feature is suitable for users who have more than one usage scenario, such as the two shown below. Using C1 &C2 buttons to save and load settings may free you from changing settings one by one when you want to change usage scenario.

D90 III Discrete settings| Usage scenario 1:

Connect with amplifier

| Usage scenario 2:

Connect with speakers

---|---|---
I np u t chan n el| USB IN| OPT IN
Output chan n e l| RCA OUT| XLROUT
Vo lu me| -40dB| -20dB
Brig h tness| High| Low

• See “1. Auto power on & off setting” in the “Setup Menu”, below.

See “2. Screen brightness setting” in the “Setup Menu”, below.

Connection

Connect to the input source

• Support IIS,USB, Coaxial, Optical, Bluetooth, AES input.

Connect to amplifier or active speakers

• Use XLR or RCA cables to connect to amplifiers or active speakers.
• In order to avoid damage to your devices, please turn off the amplifier or active speakers before you connect them to D90 III Discrete.

Operation

Power on & off/ standby operation

1. Power on & off: Press the power switch on the rear panel to turn
   • D90 III Discrete on or off.
2. Standby setting:
   • When it is working, press and hold the button on the front panel to enter standby state and press to exit standby state when it is standby.
   • Or you can press the button on remote control to enter or ex it standby state.

Input channel switching

• Press on the front panel or press the button on the remote control to switch the input circularly.

Output channel switching

• Press the button on the front panel and on the remote control to switch the output in cycle: RCA/ XLR / RCA+XLR.

Volume setting

1. Mute and unmute: Press the button on the remote control to mute D90 III Discrete, press the mute button again or adjust the volume to exit mute state.
2. Volume adjusting: You can turn the volume knob or press the + or – button on the remote control to adjust the volume. Note that long pressing the + and – buttons on the remote control will quickly change the volume, so please be careful in order to protect your hearing.

Note: Volume is fixed to 0dB in DAC mode and volume adjusting is invalid in this mode.

Setup Menu

Enter the setup menu

• After switching the power switch to “POWER OFF” press and hold the front panel button while switching to “POWER ON” to enter the D90 III Discrete setup menu.

Change settings

1. The knob on front panel:
   • Rotate the knob: Choose setting item
   • Press the knob: Change the setting/OK
2. The remote control:

Save Settings

• Please choose the 17th option of “Save and exit”.

Setting Descriptions

Auto power on & offsetting

• Signal: Input signal will trigger the device to turn on, but if the current input is not connected or input signal is invalid in 1 minute, it will automatically enter the standby state. Once having detected valid signal, it will automatically return to working state. (Default)
• TRG: 12V signal will trigger the device to turn on. When D90 III Discrete’s
  • Trigger In is connected to another device’s 12V Trigger Out, D90 III Discrete’s on/standby state can be controlled through this device.
  • The D90 III Discrete will remain in standby state until Trigger In detects the signal change from 0V to 12V. When changing back to 0V, the D90 III Discrete will return to standby state.
• Off: Disabled this function.

Screen brightness setting

• L: low brightness
• M: Medium brightness (Default)
• H: high brightness
• A: Auto has the same brightness as Medium. The difference is that when there is no operation after 30 seconds under Auto mode, the screen will be automatically turned off and only display the current input. You can press any button to light up the screen.

Line Out mode setting

• PRE: Per-Amp mode, volume adjustable (Default)
• DAC: Keep the maximum volume output and the volume is not adjustable.

DSD Bypass

• ON: DSD bypass enabled (Default)
• OFF: DSD bypass disabled

IIS interface phase setting

• STD: Standard phase (Default)
• REV: Reverse phase

DSD channel setting for the IIS interface

• LRCLK: DSDR using LRCLK (Default)
• DATA: DSDR using DATA

DSD flag bit setting for the 11S interface

• Pin 15: Set pin 15 as the flag bit (Default)
• Pin 14: Set pin 14 as the flag bit

IIS MUTE

• OFF (Default), HIGH, LOW

Note

• When using the I IS interface, noise appears when switching the sample rate, you can choose Active high/low to eliminate the noise.

Maximum output level at OdBFS

• 4V (Default), 5V

USB protocol version setting

• UAC 2.0 (Default), UAC 1.0

Bluetooth setting

• ON: Bluetooth enabled (Default)
• OFF: Bluetooth disabled

Note

• Disabling Bluetooth will not affect the use of the remote control.

PEQ setting

• OFF: PEQ disabled (Default)
• ON: PEQ enabled

PEQ project

NULL:
Unused:

• 1, 2, 3, 4, and 5 correspond to the adjusted frequency response curves for TOPPING Tune’s device configuration.

Note: On the TOPPING Tune, you can save local configuration of frequency response curves to the D90 Ill Discrete, and the D90 Ill Discrete can use this configuration offline. When connecting to TOPPING Tune, the configuration cannot be switched on the unit.

BT clear

• Sound Mode OFF (Default), Valve Sound, Transistor Sound
• Clear the Bluetooth pairing of the phone and remote control

Note

• Press any button of the remote control to automatically re-pair the remote control, the remote control stops flashing red light indicating successful pairing.

Channel balance setting

• Balance C: Balance (Default)
• Balance L +0.5dB: Setting range is L+0.5~1 0dB
• Balance R +0.5dB: Setting range is +0.5~1 0dB

Note

• Press the button or knob to adjust.

Volume step

• Vol step 1.0dB: Volume step 1 dB (Default)
• Vol step 0.5dB: Volume step 0.5dB

Note

• When the volume is from -50dB to-99 dB, you can choose to step by 0.5 or 1dB, and the step above-50 dB is fixed at 0.5dB.

Save settings and restart

• Save and exit: Save settings and restart

Factory reset

• Factory reset: Reset default

Quick menu

When it is working, press the middle button of the remote control to enter the quick menu, the quick menu is extracted from the setting menu with 3 common settings, which includes

1. PEQ setting (12th in setup menu)
2. PEQ project(13th in setup menu)
3. Channel balance setting (15th in setup menu)

The way to change settings is as above, and press the middle button to exit.

Troubleshooting

• If there are problems during use, please find the corresponding solutions through the following links.
• https://www.toppingaudio.com/faq

If there are problems during use, please find the corresponding solutions Finding Method: Window OS enters the search by pressing the button at the same time (Mac OS presses the ). Then enter the device model to jump to FQAof the device.

If you still have problems or questions, please contact us: service@tpdz.net

Precautions

1. The output jacks shall not be grounded or short-circuited.
2. Do not keep the unit in a hot, humid environment or hit the unit strongly.
3. Opening the case instantly voids the warranty!
4. Indoor use only.
5. Topping accepts no liability for any loss or damage arising directly or indirectly from the failure of D90 III Discrete.
6. For improvement purpose, specifications subject to changes without prior notice.

Specifications

D90 Ill Discrete DAC parameters (LineOut/USB In@96kHz)

| RCA| XLR
---|---|---
THD+N@A-wt| <0.00007% @1kHz| <0.00006% @1kHz
THO @No-wt (45kBw)| <0.0004% @20-20kHz| <0.0002% @20-20kHz
SNR(A-wt)| 127dB@1kHz| 131dB@1kHz
Dynamic Range (A-wt)| 126dB@1kHz| 130dB@1kHz
Frequency Response| 20Hz-20kHz (±0.5dB)| 20Hz-20kHz(±0.5dB)
20Hz-40kHz (±1.BdB)| 20Hz-40kHz(±1.8dB)
Output Level| 2.1Vrms@0dBFS (4V Mode)| 4.2Vrms @0dBFS(4V Mode)
2.6Vrms @0dBFS (5V Mode)| 5.2Vrms@0dBFS(5V Mode)
Noise (A-wt)| <1.5uVrms| <1.BuVrms
Channel Crosstalk| -122dB@1kHz| -143dB@1kHz
Channel Balance| 0.3 dB| 0.3dB
Output Impedance| 500| 1500

Note: All the above parameters were tested in the mode with output amplitude of 5V.

FCC STATEMENT

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. this device may not cause harmful interference
2. this device must accept any interference received, including interference that may cause undesired operation.

Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

To maintain compliance with FCC’s RF Exposure guidelines, This equipment should be installed and operated with minimum distance between 20cm the radiator your body: Use only the supplied antenna.

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