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This document outlines the functionality, usage, and maintenance considerations for various D&M Holdings Inc. AV receivers, amplifiers, and network players that are connectable to an Ethernet Home Network. The information is categorized by product series, detailing the necessary PC environment, broadband router specifications, supported audio formats, and troubleshooting FAQs.
The devices described are AV receivers, amplifiers, and network players designed to integrate into a home Ethernet network. Their primary function is to provide audio and, in some cases, web control capabilities. They act as clients within a network, capable of streaming music from a PC music server, accessing Internet Radio, and being controlled remotely via a web browser or specific Apple devices.
The main units are designed for connection to a home Ethernet network. They require a broadband router with a switching hub (100 Base-TX or faster), broadband Internet connection (for Internet Radio, Rhapsody, Napster), and a DHCP server. The DHCP server automatically assigns IP addresses to network devices, allowing the AV receiver/amplifier to obtain an IP address upon power-on.
To use a PC as a music server, specific environmental conditions are required. These include:
The devices support various audio formats for playback from a PC music server, DLNA server, and Internet Radio.
The devices are designed in accordance with DLNA guidelines and can connect with DLNA servers. For optimal performance, users are advised to refer to the DLNA server manual and consider using software like TwonkyMedia ver4.4.
Many models can be set up and controlled via a web browser, allowing for remote management of the AVR. Some specific models (e.g., CHR-F103, S series, ASD models) do not have a "WEB server function" for direct web control. ASD-51W and ASD-51N models can be controlled by a web browser running on iPod Touch or iPhone.
The devices can access Internet Radio stations, requiring a broadband Internet connection. Only MP3 stations are supported for Internet Radio in some models, while others also support WMA (without DRM) stations. Users may need to download a Radio Station list from the Internet to listen to Internet Radio.
Some models support AirPlay, allowing music signals to be streamed from Apple products (iPhone, iPod, iPad, iTunes) with AirPlay capability directly to the AV products. This requires the latest firmware version for both the Apple device and the AV product.
When using Windows Media Player 11 and TwonkyMedia, album art can be displayed. However, there are limitations, particularly with album art acquired by iTunes (which may not be delivered via LAN) and file size restrictions (e.g., less than 500x500 for WMA, MP3, WAV, FLAC; less than 349x349 for M4A). For USB sources, music files with album art larger than 500x500 pixels might not play correctly.
The network function is designed for home networks. In institutional networks (companies, schools, public facilities), administrators may impose restrictions for security purposes, which could prevent Internet Radio or music server functions from working. Resolving these issues requires consulting the network administrator.
If an error occurs during Radio Station list updates, it might indicate that the LAN connected to the AV amplifier cannot access the Internet. Users should check their PC's Internet connectivity and network setup. If the PC can connect but the AV amplifier cannot update, verify that the DHCP function is enabled on the router and that the AV amplifier has obtained a correct IP address (e.g., 192.168.xxx.xxx).
Some Internet Radio stations may have connection restrictions or broadcast schedules that cause them to be intermittently unavailable. If sound interrupts, it could be due to slow network transmission speed or unusual conditions in the customer's network environment. Users should test their network speed and consider choosing stations with higher sampling rates (kbps) for better sound quality. The current audio bit rate is displayed on the GUI screen to help assess quality.
If the device cannot connect to the PC music server via WMC, it might be because WMC has not authorized the AV amplifier. Users should ensure that the AV amplifier is permitted in WMC settings (a permission message usually appears automatically upon first connection).
If the PC and AV amplifier have different IP addresses or belong to different subnets, they cannot connect. Users should confirm the IP addresses of both devices (using "ipconfig" on Windows XP) and ensure they are compatible. Typically, both devices should be set for automatic IP address acquisition from the router.
SSManager is a tool for backing up the device's settings. This allows users to save settings to a PC's HDD and restore them later, which is useful for recovering from incorrect operations. This feature is specific to AV Receiver and Amplifier products, and not available for S series and ASD models without a "WEB server function."
The devices confirm operation with various DLNA servers (e.g., Dixim Media Server, Twonky Vision). However, all functions and actions are not guaranteed. If playback issues occur, especially with WAV (no loss) format files created by Windows Media Player 11 (due to added data), using other applications like Real Player to create the WAV files is suggested.
Progressive JPEG is not supported by some models (AVR-3808/AVC-3808/S-52/S-32). Album art display has size limitations, and if the music file contains album art larger than specified, playback might not start correctly, especially for USB sources.
If audio breaks off when connected wirelessly, it could be due to interference from other equipment (e.g., microwave ovens), interference with other wireless LANs, or increased communication quantity. Countermeasures include detaching interfering equipment, changing the wireless channel of the router, or switching to a wired connection.
Windows Media Player 11 does not conform to streaming FLAC or M4A files. Server applications like TwonkyMedia are necessary for playing these formats.
If the Photos menu is not displayed when using TwonkyMedia, it might be because the server identifies the DENON product as "Device only for Audio." Users should change the client type to "Generic Media Receiver" in TwonkyMedia's "Clients/Security" settings (version 4.4.3 or former) or update to the latest version (4.4.4 or more). If files are not displayed, it could be due to too many subfolders (over 300) in the registered folder, requiring file management.
Windows Vista may prompt for AV Receiver installation due to Plug and Play capabilities. This installation is not necessary, and users can select "Don't show this message again for this device."
Noisy sounds may be outputted when FLAC HD content is chosen in Party mode. Users should use non-HD content (32/44.1/48kHz, 16bit) as the source for Party playback.
If sound interruptions occur during AirPlay playback from PC iTunes, it could be due to a lack of PC performance, HDD fragmentation, or fragmentation of packets on the network. If PC speaker output is fine, modifying the PC's MTU setting to 1500 is recommended.
When using AirPlay from an iPad, metadata on FLD/GUI might not update for new tracks without album art if the previous track had album art. This is a known issue reported to Apple.
Some servers (e.g., Windows Media Player 12, Buffalo HS-DH***GL, NETGEAR ReadyNas) do not allow PAUSE playback by the specific method used by D&M products, to comply with DLNA specifications.
General| Type | AV receiver |
|---|---|
| Amplifier Type | Discrete |
| HDMI Outputs | 3 |
| 4K Ultra HD Pass-through | Yes |
| 3D Pass-through | Yes |
| Dolby Atmos | Yes |
| DTS:X | Yes |
| Audyssey MultEQ XT32 | Yes |
| AirPlay | Yes |
| Ethernet | Yes |
| Signal-to-Noise Ratio | 102 dB |
| Input Sensitivity | 200 mV |
| Tuner Type | AM/FM |
| Power Output (8 Ohms) | 125W per channel |
| Frequency Response | 10Hz-100kHz |
| Built-in Streaming Services | Yes |
| USB | Yes |
| Video Inputs | Component x 2 |
