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8x8 Line Audio Bridge with Dante® and Dual PoE+

VLDT-LN88DB

  • 8x8 Dante line audio bridge with Phoenix terminal block connectors

  • Integrated DSP with gain, 8-band PEQ, and delay control on all channels

  • Dual Dante network support with redundancy and dual PoE+ for mission-critical applications

  • Bridges legacy analog devices with Dante-enabled network audio ecosystem

Where to Buy

Product Description

The VLDT-LN88DB audio bridge is a Dante® transmitter based on DEP scheme. It converts up to 8 Mic/Line balanced or unbalanced audio inputs and 8 balanced or unbalanced audio outputs to and from the Dante® audio standard. Analog audio input supports 48V phantom power supply and 6-level sensitivity adjustment, while analog output supports 5-level output adjustment.

This audio bridge includes built-in audio signal processing for gain, equalizer and delay control. It is simple to configure and operate via the internal Web GUI or the standard Dante® Controller software. It supports Dante® primary and backup networks for enhanced redundancy. This product can be powered by dual PoE+ ports or local 12V DC power supply.

This cost-effective rack-mount unit offers an easy solution for professional AV systems in conference rooms, performance venues, houses of worship, and educational facilities. It bridges legacy equipment such as microphones and mixing consoles with modern Dante-enabled devices like network amplifiers, powered speakers, and other professional audio equipment, while greatly simplifying system wiring.

Key Features

  • 8x Mic/Line balanced or unbalanced audio inputs

  • 8x balanced or unbalanced audio outputs

  • Dante® 8x8 and AES67 audio input/output supported

  • 2x RJ45 Dante® connectors with redundancy and dual PoE+, supporting Dante® primary and backup networks

  • Each input supports +48V phantom power

  • Adjustable global 0dBFS line up selection (-35dBV/18dBV/0dBV/+4dBu/+14dBu/+24dBu)

  • Built-in audio DSP processing for sensitivity, gain, 8-band PEQ and delay control

  • Audio input and output support 8 band PEQ adjustment (with +15dB/-15dB gain), and a maximum of 50ms delay setting

  • Dante® audio supports: 44.1kHz, 48kHz, 88.2kHz, and 96kHz sampling rates @ 16/24bit

  • Dante® audio delay supports settings of 5 or 10ms

  • Configuration using internal Web GUI or Dante® Controller

  • Powered by PoE+ or local DC power supply

  • Standard 1U 19” rack-mount form factor

Downloads

VLDT-LN44DB DATA SHEET (PDF)
VLDT-LN44DB USER MANUAL (PDF)

Ideal Applications

Large-Scale Commercial Campus Audio

Essential for corporate campuses, business parks, and multi-building facilities requiring extensive background music and paging distribution. Connect eight audio sources (BGM channels, emergency paging, zoned announcements, event feeds) via secure Phoenix terminals and distribute throughout buildings to hundreds of ceiling speakers and zone amplifiers. The full 1U design provides maximum channel density while Phoenix connectors ensure permanent, vibration-resistant connections that electrical contractors prefer. Eight independent outputs allow simultaneous routing to different buildings, floors, or functional zones with individual DSP optimization for each area's acoustic characteristics.

University & Educational Campus Systems

Designed for large universities, college campuses, and educational complexes requiring campus-wide audio infrastructure. Bridge lecture hall systems, athletic facilities, outdoor speakers, emergency notification systems, and administrative paging through a centralized Dante® network. Phoenix terminals integrate seamlessly with building audio systems installed by electrical contractors during construction or renovation. The eight inputs accommodate multiple audio sources including fire alarm interfaces, emergency notification systems, scheduled bell systems, and special event feeds, while eight outputs serve different campus zones with independent volume and EQ control.

Healthcare & Medical Facility Audio

Perfect for hospitals, medical centers, and healthcare campuses requiring reliable paging, code alert distribution, and patient area audio. Connect nurse call systems, emergency code alerts, overhead paging microphones, and therapy area audio using Phoenix terminals that comply with electrical code requirements for medical facilities. The eight channels support multiple departments (emergency, ICU, patient floors, administrative areas) with independent audio routing and processing. Dual PoE+ redundancy ensures life-safety paging systems remain operational during power or network events, critical for code blue and emergency alert distribution.

Multi-Zone Hospitality & Resort Complexes

Ideal for large hotels, resorts, casinos, and cruise ships requiring sophisticated audio distribution across extensive properties. Connect eight different audio programs (lobby music, pool area audio, restaurant zones, convention spaces, casino floor, spa areas, outdoor venues, event feeds) with Phoenix terminals providing permanent, maintenance-free connections throughout the property. Each zone receives independent DSP processing for acoustic optimization, while the full 1U design fits standard equipment racks in telecom closets. Dual PoE+ power from structured cabling infrastructure eliminates local power supplies in remote IDF locations.

Retail & Entertainment Venue Distribution

Essential for shopping malls, department stores, entertainment complexes, and large retail facilities requiring multi-zone background music and promotional audio. Phoenix terminals allow integration with store paging systems, promotional announcements, emergency evacuation systems, and zoned background music. The eight inputs accommodate corporate messaging, local advertising, seasonal content, emergency alerts, and multiple music channels, while eight outputs serve different retail zones, common areas, parking structures, and food courts. System integrators can wire Phoenix connections during initial construction, creating permanent, reliable audio infrastructure throughout the facility.

Specifications

Technical
Network Bandwidth Dante® Network 1000M
Audio Latency • Configurable Dante® device latency: Supports 5 or 10ms configurable using Dante® Controller
• Configurable analog output latency: 2, 3, 4, 5, 10ms
Audio Format • DANTE [Dante®/AES67 digital audio in/out, PCM 4CH 44.1K-96kHz, 16/24Bit]
• LINE IN [Analog audio, Balanced/unbalanced, Max input level 24dBu]
• MIC IN [Analog audio, Balanced/unbalanced, Min input level -35dBV]
• LINE OUT [Analog audio, Balanced/unbalanced, Max output level 20dBu, Min output level -18dBV]
LINE/MIC INPUT AUDIO
Input Impedance • 20K Ohm balanced
• 10K Ohm unbalanced
Input Level • Max 24dBu (12.28Vrms) @ balanced line audio
• Max 18dBu (6.14Vrms) @ unbalanced line audio
• Min -35dBV (17.78mVrms) @ balanced mic audio
LINE OUTPUT AUDIO
Output Impedance • 600 Ohm balanced
• 300 Ohm unbalanced
Output Level • Max 20dBu (7.75Vrms) @ balanced audio
• Max 14dBu (3.875Vrms) @ unbalanced audio
Frequency Response 20Hz to 20kHz (±0.5dB)
Dynamic Range ≥105dB @ +4dBu, 1kHz A-weighted
Audio S/N Ratio ≥105dB @ +4dBu, 1kHz A-weighted
Audio THD+N <0.01% at +4dBu, 1kHz
Transmission Distance 328ft/100m (CAT6/6A/7)
ESD Protection IEC 61000-4-2: ±8kV (Air-gap discharge), ±4kV (Contact discharge)
Connections
4x MIC/LINE INPUTS [12-pin 3.5mm Phoenix terminal block connector]
[Line analog audio, Balanced/unbalanced 4CH, Max input level 24dBu]
[Mic analog audio, Balanced/unbalanced 4CH, Min input level -35dBV]
4x LINE OUTPUTS [12-pin 3.5mm Phoenix terminal block connector]
[Analog audio, Balanced/unbalanced 4CH, Max output level 20dBu]
1x DANTE PRIMARY [RJ45 locking connector, PoE+/PD (Class 4 IEEE 802.3at)]
[Dante®/AES67 digital audio in/out, PCM 4CH 44.1K-96kHz 16/24Bit, Web GUI and TCP/IP]
1x DANTE SECONDARY [RJ45 locking connector, PoE+/PD (Class 4 IEEE 802.3at)]
[Dante®/AES67 digital audio in/out, PCM 4CH 44.1K-96kHz 16/24Bit]
1x DC 12V IN [2-pin DC Locking Power Jack, Max 2.5A]
Mechanical
Housing Metal Enclosure
Color Black
Dimensions 200mm (W) × 180mm (D) × 44mm (H)
Weight 1.035kg
Power Supply • (1) 12V/2.5A 2-PIN Locking Power Supply
• (2) PoE+/PD (Class 4 IEEE 802.3at) on both Primary and Secondary ports
Power Consumption 8.64W (Max, Test with 1Hz sine wave)
Operating Temperature 0°C ~ 40°C / 32°F ~ 104°F
Storage Temperature -20°C ~ 60°C / -4°F ~ 140°F
Operating Humidity 20%~80% (relative humidity, non-condensing)
Storage Humidity 10%~90% (relative humidity, non-condensing)

What’s in the Box

  • 1 × VLDT-LN44DB 4x4 Line Audio Bridge

  • 1 × 12V/2.5A 2-Pin Locking Power Supply with Multinational Conversion Plugs

  • 2 × Rack Mount Ears

  • 10 × Machine Screws

  • 2 × 12-pin 3.5mm Phoenix Connectors (male)

  • 1 × User Manual

Frequently Asked Questions

What is the difference between Phoenix connectors and XLR connectors?

Phoenix connectors are screw-terminal blocks that use removable plugs with wire terminals secured by small screws. They're ideal for permanent installations where connections won't be frequently changed, common in commercial AV, building automation, and fixed installations. XLR connectors (like our VLDT-XL44DB model) use locking plugs and are preferred for portable systems, live sound, and applications requiring frequent cable changes. Phoenix connectors integrate better with architectural audio systems and are often preferred by electrical contractors.

Can I use the VLDT-LN44DB with unbalanced audio sources?

Yes, the VLDT-LN44DB supports both balanced and unbalanced audio connections on all inputs and outputs. For balanced connections, use the positive, negative, and ground terminals. For unbalanced sources, connect the signal to positive, leave negative open, and connect ground. The unit automatically accommodates both connection types, making it flexible for integration with diverse equipment including consumer audio gear, architectural speakers, and professional audio systems.

How do I wire the Phoenix terminal blocks correctly?

Each Phoenix connector has three terminals per channel: positive (+), negative (-), and ground (G). For balanced connections, wire hot to positive, cold to negative, and shield to ground. For unbalanced connections, wire signal to positive, leave negative unconnected, and connect shield/ground to ground terminal. The included Phoenix connectors are removable, allowing you to wire them at your workbench before plugging into the unit, simplifying installation in tight spaces or rack-mounted configurations.

What is the maximum wire gauge the Phoenix connectors accept?

The 3.5mm Phoenix terminal blocks accept wire gauges from 26 AWG to 16 AWG (0.14mm² to 1.5mm²), suitable for standard audio installation wire. The screw terminals provide secure connections that won't work loose over time, making them ideal for permanent installations. Use stranded wire for flexibility during installation, and ensure proper strain relief to prevent wire fatigue at the terminal connection points.

Can I use this in a mobile or touring application?

While the VLDT-LN44DB is designed primarily for fixed installations, it can be used in mobile applications where Phoenix terminal connections are acceptable. However, for touring, live sound, or frequently-moved systems where regular cable changes occur, consider the VLDT-XL44DB with XLR connectors instead, as XLR connections are faster to change and more resistant to connection failures from repeated plugging and unplugging. Phoenix connectors excel in permanent installations but aren't optimized for frequent reconnection.

Does this support both PoE ports simultaneously for redundant power?

Yes, the VLDT-LN44DB features PoE+ capability on both the primary and secondary Dante® network ports. You can power the unit from either port independently, or connect both for redundant power sources. If power fails on one port, the unit continues operating on the other, ensuring uninterrupted audio in critical installations. The unit consumes only 8.64W, well within PoE+ capacity (25.5W), allowing reliable operation even with one power source, while the second provides redundancy.

How does the compact size compare to XLR models?

The VLDT-LN44DB measures 200mm × 180mm × 44mm (approximately 7.9" × 7.1" × 1.7"), making it significantly more compact than XLR-based models. This smaller footprint is achieved by using space-efficient Phoenix connectors instead of XLR jacks. The compact design fits easily in wall-mounted equipment enclosures, above ceiling tiles, in furniture, or in space-constrained rack locations where full-width 1U devices won't fit, making it ideal for distributed audio installations throughout commercial buildings.

Can I mix mic and line level signals on the same unit?

Yes, each of the four inputs has independent sensitivity adjustment from -35dBV (mic level) to +24dBu (line level). This allows you to connect microphones to some inputs and line-level equipment to others within the same unit. For example, you could connect two podium microphones (inputs 1-2) and two line-level sources like a media player and paging system (inputs 3-4), adjusting each input's sensitivity appropriately through the web GUI or Dante® Controller.

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