Connect to a HEOS Device

HiFi Control connects directly to HEOS-enabled Denon and Marantz devices on your local network. No internet port forwarding is required.

Before You Start

1. Turn on the HEOS device and let it finish connecting to the network.
2. Connect the Windows PC and the device to the same trusted home LAN. Ethernet and Wi-Fi can be mixed, but avoid guest networks and isolated IoT networks.
3. Temporarily disconnect any VPN on the PC.
4. If you want to control a compatible receiver while it is in standby, enable Network Control, Network Standby, or Always On in the receiver’s network settings. The exact name varies by model.

Check the Device With the Official HEOS App

The official HEOS app is a useful first test because it also finds and controls devices over the local network.

1. Connect the phone or tablet running the HEOS app to the same home LAN as the device.
2. Open the app and confirm that the device or zone appears.
3. Test a basic action such as changing the volume or starting and pausing playback.
4. Check the device’s network information in the HEOS app, or in your router’s connected-device list, and note its IPv4 address.

If the HEOS app cannot find or control the device, fix that connection first. Check the device’s Wi-Fi or Ethernet connection, restart the device and router, and follow the network setup instructions for the Denon or Marantz model.

If the HEOS app works but HiFi Control does not, focus on the Windows PC’s network profile, firewall, VPN, and the connection tests below.

Add the Device in HiFi Control

You can add a device during the Setup Wizard or from Settings → Favorite Devices.

1. Start device detection and wait for the scan to finish. HEOS discovery can take up to 20 seconds.
2. Select each device or zone you want to add.
3. If the device is not found, add it manually with the IPv4 address obtained from the HEOS app or router.

Manual entry bypasses automatic discovery, but the PC must still be able to reach the device directly. HiFi Control also uses the device’s MAC address for later IP-address recovery, so the most reliable setup keeps the PC and HEOS device on the same local subnet.

Work Through Network Problems

Check these items in order:

1. Confirm the network path. The PC and device should have IPv4 addresses in the same home network. They do not have to use the same Wi-Fi band, and one can use Ethernet, but the router must allow communication between wired and wireless clients.
2. Avoid isolated networks. Move either device off a guest SSID, isolated IoT VLAN, or Wi-Fi network with client/AP isolation enabled.
3. Disconnect VPN software. A VPN or security product can divert local traffic or interfere with multicast discovery.
4. Check the saved address. If the problem started after a router restart, the device may have received a new IP address. On the disconnected card, select Start Discovery to locate it by its saved MAC address. You can also update its address in Settings → Favorite Devices.
5. Reserve the address. Create a DHCP reservation for the HEOS device in the router so its IP address stays stable.
6. Restart in a useful order. Restart the router or access point, wait for it to become ready, restart the HEOS device, and then reopen HiFi Control.

A successful ping is helpful but not conclusive. It does not prove that HEOS discovery or the HEOS control service is available.

Check the HEOS Connection Ports

Open PowerShell on the PC and replace 192.168.1.50 with the device’s IPv4 address:

Test-NetConnection 192.168.1.50 -Port 1255

TcpTestSucceeded : True confirms that the main HEOS control service is reachable. HiFi Control uses one persistent, bidirectional TCP connection to device port 1255 for commands, responses, and live HEOS events.

Compatible Denon and Marantz AV receivers use a separate connection for power, master volume, maximum volume, and mute. If normal playback controls work but those receiver controls do not, also run:

Test-NetConnection 192.168.1.50 -Port 23

Port 23 is optional and is not normally available on standalone HEOS speakers. A failed port 23 test on an AV receiver can also mean its Network Control setting is disabled.

Check Windows Firewall

Keep the firewall enabled. HiFi Control normally needs outbound access and the return traffic for connections it starts.

1. Open Windows Security → Firewall & network protection.
2. Confirm that the current home network uses the Private profile.
3. Open Allow an app through firewall and allow HiFiControl.exe on Private networks. If you create a custom rule instead, limit it to the Private profile and local subnet.
4. Check any third-party antivirus, endpoint-security, or firewall application for a separate local-network, multicast, or application rule.
5. Retry device detection and the port 1255 test.

For advanced firewall or VLAN configurations, HEOS uses the following local-network traffic:

Purpose	Traffic to allow
Automatic discovery	PC sends UDP to 239.255.255.250:1900; the device replies to the temporary UDP port used by the PC
Device verification	PC fetches the HTTP URL supplied in the discovery response
HEOS control and events	PC opens a bidirectional TCP session to device port 1255
Receiver power and master volume	PC opens a bidirectional TCP session to device port 23 on compatible receivers
Play a file from the PC	The device connects back to a dynamic TCP port opened by HiFiControl.exe

Do not create inbound Windows rules for ports 1255 or 23. Those ports are on the HEOS device, not the PC. Do not forward any of these ports from the internet, and do not enable router WAN port mapping as a troubleshooting step.

Match the Symptom

Symptom	What to check first
The official HEOS app and HiFi Control both fail	Device network setup, guest/client isolation, router, or network standby
The HEOS app works, but automatic detection finds nothing	PC Private network profile, VPN, SSDP multicast, firewall, or different subnets
Automatic detection fails, but port 1255 succeeds	Add the device by IPv4 address; then check SSDP and same-subnet MAC detection
The device is listed but will not connect	Saved IP address and TCP 1255
The device stopped connecting after a router restart	Use Start Discovery, update the saved address, and add a DHCP reservation
Playback works, but receiver power or master volume does not	TCP 23 and the receiver’s Network Control setting
Controls work, but a file selected on the PC will not play	Private-profile application firewall rule, client isolation, and device-to-PC traffic
Streaming services or HEOS Favorites do not load	HEOS account sign-in, not the basic LAN connection

HEOS Account Sign-In Is Separate

A HEOS account is not required for the basic local connection. It is required for paid streaming services, HEOS Favorites, and HEOS Playlists.

If the device connects but this content is unavailable, open Settings → HEOS, enter the same HEOS account used by the official HEOS app, and select Sign In. See HEOS Plugin for details.

Collect Diagnostics

If the connection still fails:

1. Open Settings → About and enable Extended Logging.
2. Restart HiFi Control and reproduce the problem.
3. Check Settings → About → Issues → View recent issues.
4. Open the log folder from Settings → About → Logs → Open log folder.
5. Include the current log file and Installation ID when contacting support.

See Logging & Diagnostics for the complete log-sharing steps.