Item# ABH 4000

ABH 4000


Four-room/eight-room A-BUS expansion hub


$629.95 each $699.95


Enjoy 10% Off!

Product Actions

Add to cart options


Different music in different rooms – that’s what you get from the ABH 4000 four-room/eight-room A-BUS® expansion hub. ABH 4000 hubs provide fully controllable audio playback within multiple spaces in your home or office. All you need is an A-BUS-equipped Harman Kardon® receiver or home theater system to serve as a central sound source, plus AB 1 amplified in-wall modules and a Cat. 5/5e-connected network. If your receiver, pre-amplifier or surround processor is not A-BUS/ready™ and does not feature A-BUS connectivity, no worries; you can use the ABH 4000’s onboard audio inputs to distribute audio from any “Tape” or “Multiroom” output to any room connected to the ABH 4000’s network. For added flexibility, you can add an optional infrared (IR) receiver/sensor to handle direct remote-control commands for source components, including CD and DVD players. The ABH 4000 can handle it all; after all, the hub has power inputs, A-BUS inputs, A-BUS outputs, IR outputs, audio outputs and other connectors. The ABH 4000 is a perfect solution for a house full of people who have different musical tastes

Know What's In The Box

  • 1 ABH 4000 expansion hub
  • 1 power supply
  • 1 6' (2m) AC power cord
  • 1 3' (1m) RJ-45 connection jumper cable
  • Owner’s manual

Shop all Accessories

Not finding what you're looking for?

Shop all Accessories

Ideal for audiophiles who love to host parties – or for those who have families with highly diverse musical tastes – the ABH 4000 extends different kinds of music across multiple, discrete entertainment zones.

The ABH 4000 can work with components that aren’t A-BUS/ready. This ability gives you increased value and flexibility. It even saves you money; the ABH 4000 distributes different music in different zones, so you won’t need to spend money on additional source components for every part of the house.

The ABH 4000’s infrared (IR) sensor ports provide direct control from the main listening room. And if you need to control multiple source components, the hub also offers additional IR emitter connections.

The ABH 4000 allows for simplified A-BUS networking, requiring only standard Cat. 5/5e cables fitted with RJ-45 connectors. RCA audio inputs let you connect easily with source components that aren’t A-BUS/ready.

Via the unit’s expansion in/out ports, you can connect multiple ABH 4000 hubs to A-BUS/ready source components, thereby expanding the reach and range of your sound system to multiple rooms. Perfect for audiophiles with large homes, these expansion hubs let you customize the output to different playback areas for each primary component.

Thanks to its LED lights, the ABH 4000 keeps you informed of system status and power levels. And its infrared (IR) remote control helps you through system setup, testing and troubleshooting. In everyday use, the LEDs confirm that commands have reached the unit, ensuring that your system complies with your every whim.

Exemplifying the balance among high style, modern design and audio ingenuity, the ABH 4000 expansion hub embodies the spirit of Harman Kardon innovation, a legacy that discerning audio enthusiasts have revered for almost 60 years. Harman Kardon engineers have consistently advanced the science of sound, developing products that are dedicated to quality, durability and, most importantly, generating rave reviews from audiophiles.

Trigger Output
12 volts, 100ma
Power Supply Output
24-volt, 4-amp supply included
Power Supply Input
108 – 264 VAC, 115 watts

The latest owner's manuals, quick start guides, and documents.

1 Year Electronic

Products purchased online or from an authorized local retailer and under warranty may qualify for an exchange with a valid receipt.

Purchases made from an unauthorized dealer will not be elibible for exchange.

Request an Exchange


  • Sales and pre-sale assistance
  • Technical help
  • Parts and accessories


Store Locator

No Online Dealer's available for this product

Find a Store Near You

The Store Locator is designed to help you find the closest store near you.

Click a store in the list or on the map to view details.