KGUSS Topping E70 Velvet AK4499EX DAC Audio Decoder User Manual

مقدمة

The KGUSS Topping E70 Velvet is a high-performance Digital-to-Analog Converter (DAC) designed for audiophiles. It features the flagship AK4499EX DAC chip, Bluetooth 5.1 with LDAC support, and a versatile range of inputs and outputs. This manual provides detailed instructions for setting up, operating, and maintaining your E70 Velvet DAC.

ماذا يوجد في الصندوق

قم بفك الصندوق بعناية وتأكد من وجود جميع العناصر:

E70 Velvet DAC Unit
جهاز التحكم عن بعد
كابل يو اس بي
التيار المتردد كابل
هوائي البلوتوث
دليل المستخدم (هذا المستند)
بطاقة الضمان

Contents list of the Topping E70 Velvet DAC, showing the main unit, remote control, USB cable, AC cable, Bluetooth antenna, user manual, and warranty card. — الشكل 1: محتويات العبوة

المنتج انتهىview

اللوحة الأمامية

The front panel features the display, input selection button, and a multi-function knob for volume control and menu navigation.

أمام view of the Topping E70 Velvet DAC, showing the display, input selection button, and volume knob. — الشكل 2: اللوحة الأمامية

اللوحة الخلفية

The rear panel provides all input and output connections, including balanced XLR, single-ended RCA, Coaxial, Optical, USB, and Bluetooth antenna port, along with the power input and 12V Trigger interface.

مؤخرة view of the Topping E70 Velvet DAC, showing XLR, RCA, Coaxial, Optical, USB inputs, Bluetooth antenna port, 12V Trigger, and power input. — الشكل 3: توصيلات اللوحة الخلفية

يثبت

توصيل الطاقة

Connect the AC power cable to the power input on the rear panel of the E70 Velvet.
Plug the other end of the AC power cable into a suitable wall outlet.

ربط مصادر الصوت

The E70 Velvet supports multiple digital audio inputs:

مدخل USB: Connect your computer (Windows, Mac, Linux), iOS, or Android device to the USB input using the provided USB cable. For Windows ASIO applications, a driver installation is required. For other operating systems, it is typically plug-and-play.
المدخلات المحورية: Connect a digital audio source (e.g., CD player, digital turntable) to the Coaxial input.
Optical (Toslink) Input: Connect a digital audio source (e.g., TV, game console) to the Optical input.
مدخلات بلوتوث: Attach the Bluetooth antenna to the designated port on the rear panel. Enable Bluetooth on your source device and pair with the E70 Velvet.

Connecting Audio Outputs

The E70 Velvet offers both balanced and single-ended analog outputs:

إخراج XLR: الاتصال بـ amplifier or active speakers with balanced XLR inputs using XLR cables.
إخراج RCA: الاتصال بـ amplifier or active speakers with single-ended RCA inputs using RCA cables.

تعليمات التشغيل

تشغيل/إيقاف الطاقة

اضغط على زر الطاقة الموجود على اللوحة الأمامية أو جهاز التحكم عن بعد لتشغيل الوحدة أو إيقاف تشغيلها.

اختيار الإدخال

Press the input selection button on the front panel or use the remote control to cycle through available inputs (USB, Coaxial, Optical, Bluetooth).

Volume Control (Preamplifier Mode)

If the E70 Velvet is set to Preamplifier mode, the multi-function knob on the front panel or the volume buttons on the remote control can adjust the output volume from -99dB to 0dB.

وظيفة التشغيل/الإيقاف التلقائي

The E70 Velvet features an automatic on/off function. It will automatically turn on and select the input with a valid signal. If no signal is detected for 1 minute, the unit will automatically turn off.

Image illustrating the auto on/off function of the Topping E70 Velvet DAC. — Figure 4: Auto On/Off Function

ضبط سطوع الشاشة

The screen brightness can be adjusted through the unit's menu settings. Refer to the troubleshooting video for a demonstration of this setting.

Video 1: Demonstrating screen brightness settings and other basic operations.

Selectable Output Port

The E70 Velvet allows you to choose between XLR only, RCA only, or both XLR+RCA outputs simultaneously, depending on your audio setup requirements.

Close-up of the rear panel showing XLR and RCA output ports. — Figure 5: Selectable Output Ports

قبلampوظيفة lifier

In addition to its DAC mode with a fixed output level, the E70 Velvet can operate as a preamplifier. This allows direct control of the output volume, providing convenience when connected to a power amplifier or active speakers without a separate preampمكبر.

Image showing the Topping E70 Velvet DAC in preamplifier mode, connected to an ampمكبر. — الشكل 6: ما قبلampوظيفة lifier

الميزات الرئيسية

Flagship AK4499EX DAC Chip: The E70 Velvet utilizes the high-performance AK4499EX DAC chip, known for its exceptional audio fidelity. This chip contributes to the device's low distortion and high signal-to-noise ratio.
Figure 7: AK4499EX DAC Chip
Low-Noise Voltage Reference Power Supply: The device incorporates a low-noise voltage reference power supply, which significantly reduces distortion to as low as -125dB and keeps noise below 1.3uVrms, ensuring a clean audio signal.
Figure 8: Low-Noise Voltagمرجع هـ
LDAC 24bit/96kHz Bluetooth Transmission: Certified for Hi-Res Audio Wireless and LDAC, the E70 Velvet uses the QCC5125 chipset to support high-quality Bluetooth audio protocols including LDAC, AAC, SBC, aptX, aptX LL, aptX HD, and aptX Adaptive.
Figure 9: Bluetooth 5.1 with LDAC
Newest XMOS XU316 USB Support: The XU316 USB interface supports DSD512 and PCM 768kHz, offering broad compatibility with Windows 10/11, Mac, Linux, iOS, and Android devices.
Figure 10: XMOS XU316 Chip
12V Trigger Interface: The E70 Velvet includes a 12V Trigger interface for synchronized power control with other compatible audio equipment, such as the Topping L70 headphone amplifier. This allows for automatic power on/off of connected devices.
Figure 11: 12V Trigger Interface

تحديد

The following table details the technical specifications of the E70 Velvet DAC:

المعلمة	رسيا الإخراج	إخراج XLR
ثد+ن (أ-بالوزن)	<0.00008% عند 1 كيلوهرتز	<0.00006% عند 1 كيلوهرتز
THD @90 كيلو واط (بدون وزن)	<0.0002% عند 20-20 كيلو هرتز	<0.0002% عند 20-20 كيلو هرتز
SNR (أ-بالوزن)	125 ديسيبل @ 1 كيلو هرتز	131 ديسيبل @ 1 كيلو هرتز
النطاق الديناميكي (أ-بالوزن)	125 ديسيبل @ 1 كيلو هرتز	131 ديسيبل @ 1 كيلو هرتز
استجابة التردد	20 هرتز - 40 كيلو هرتز (±0.3 ديسيبل)	20 هرتز - 40 كيلو هرتز (±0.2 ديسيبل)
استجابة التردد	20 هرتز - 40 كيلو هرتز (±1.0 ديسيبل)	20 هرتز - 40 كيلو هرتز (±0.8 ديسيبل)
مستوى الإخراج	2.1Vrms @ 0dBFS (وضع 4 فولت)	4.2Vrms @ 0dBFS (وضع 4 فولت)
مستوى الإخراج	2.5Vrms @ 0dBFS (وضع 5 فولت)	5.0Vrms @ 0dBFS (وضع 5 فولت)
الضوضاء (بالوزن)	<1.3 ميكرو فولت جذر متوسط مربع	<1.3 ميكرو فولت جذر متوسط مربع
قناة Crosstalk	-130 ديسيبل @ 1 كيلو هرتز	-143 ديسيبل @ 1 كيلو هرتز
توازن القناة	0.3 ديسيبل	0.3 ديسيبل
معاوقة الخرج	50 أوم	100 أوم

Note: The above data is the result obtained from TOPPING lab test under AC220V 50Hz and E70 Velvet set to 5V output mode.

التنسيقات المدعومة

مدخل	PCM	DSD (أصلي)	DSD (DoP)
مدخل USB	44.1kHz-768kHz / 16bit-32bit	DSD64-DSD512	DSD64-DSD256
إقناع / OPT IN	44.1kHz-192kHz / 16bit-24bit	X	X
بي تي إن	AAC/SBC/APTX/APTX LL/APTX HD/APTX Adaptive/LDAC	X	X

استكشاف الأخطاء وإصلاحها

This section addresses common issues you might encounter with your E70 Velvet DAC. For visual guidance, please refer to the troubleshooting video below.

Video 2: TOPPING E70 Velvet Troubleshooting Guide

المشاكل الشائعة والحلول

ظاهرة	حل
تشغيل صاخب	Try with different songs. Ensure the specifications of the songs are supported by this unit. If noise appears only when playing DSD files, check and adjust the computer system volume and music player volume to maximum. Check the source, downstream equipment, and cables for issues. If noise disappears after unplugging the USB cable, it may be interference from the source. Consider adding a USB isolator.
One channel with noise/no output	Check the source, downstream equipment, and cables. Try swapping the left and right channel connections and test with another source. In the Topping control panel, set Volume -> Output to 0dB.
Channel imbalance	Set to "CB 0.0dB" in the setup menu. Check the source, downstream equipment, and cables. Try swapping left and right channel connections.
لا يمكن إقران البلوتوث	Enable Bluetooth function in the setup menu (BT ON). The unit may be connected to another Bluetooth device. Press and hold the brightness button on the remote to enter pairing mode. Bring the Bluetooth device closer to the unit. Turn the power of the unit off and on again. Remove obstructions between the Bluetooth device and the unit.
Bluetooth audio cut off	To prevent electromagnetic interference, locate the unit away from microwave ovens, wireless LAN devices, and other Bluetooth devices. أعد توصيل جهاز البلوتوث.
Connected USB device not recognized	Ensure the USB cable is connected properly. Try a different USB cable. جرب منفذ USB آخر على جهاز الكمبيوتر الخاص بك. If it's a driver problem, try reinstalling the driver from the manufacturer's webموقع. Test with a different computer. تتطلب بعض الهواتف تمكين وظيفة OTG أولاً.
جهاز التحكم عن بعد لا يستجيب	Enable remote control function in the setup menu (r-O). Insert two fresh AAA batteries. Aim the remote control at the remote control receiver on the unit. Bring the remote control closer to the device. Use your Android phone's camera to check if the remote's IR emitter blinks when a button is pressed. If not, the remote may be defective. If you have multiple Topping devices, ensure you are using the correct remote control.
Cannot adjust unit's volume	Check if DAC mode is set in the setup menu (d-d). In DAC mode, the volume is fixed at maximum. To adjust volume, set the unit to Preamplifier (PRE) mode.

صيانة

To ensure the longevity and optimal performance of your E70 Velvet DAC, follow these maintenance guidelines:

تنظيف: استخدم قطعة قماش ناعمة وجافة لتنظيف الجزء الخارجي من الجهاز. تجنب استخدام المنظفات الكاشطة أو المذيبات أو البخاخات الكيميائية.
الموقع: ضع الجهاز على سطح مستوٍ وثابت بعيدًا عن أشعة الشمس المباشرة ومصادر الحرارة والرطوبة الزائدة. تأكد من وجود تهوية كافية حول الجهاز.
قوة: Disconnect the power cable from the wall outlet if the unit will not be used for an extended period.
التعامل: تجنب إسقاط الوحدة أو تعريضها لصدمات قوية.

الضمان والدعم

The KGUSS Topping E70 Velvet DAC comes with a manufacturer's warranty. Please refer to the included warranty card for specific terms and conditions. For technical support, service, or warranty claims, please contact the seller or the manufacturer directly. Keep your purchase receipt as proof of purchase.

KGUSS E70 Velvet