For high-end and professional installations, the Bowers & Wilkins CDA-4HD 4-Channel DSP Amplifiercan provide 125W of power distribution across four channels at 4 ohms, or if needed, bridged to deliver 2 or 2.1-channels of sound. Either two 250W or two 125W with one 250W. Made to power custom Bowers & Wilkins loudspeaker installations, the integrated Digital Signal Processing (DSP) lends the CDA-4HD the ability to be used in a variety of setups, and also features a dynamic EQ for tuning Bowers & Wilkins subwoofers. Plugging into your rack with a 1U design and full-rack width, the CDA-4HD takes up minimal space, and offers an Ethernet connection for convenient amplifier management over a local network.

4-Channel 125W Power at 4 Ohms    Bridgeable to 2.0 & 2.1 Channels    Integrated Digital Signal Processing    Dynamic EQ for B&W Subwoofers    Class-D Amplification    Network Management via Ethernet    1U Full-Rack Width Design    15-Minute Automatic Shutoff    Front Panel Power, Zone & Network LEDs    Analog & Digital RCA Rear Inputs

• Class D amplification
• Ability to power one or two zones
• Bridgeable to 2.0 channels at 250W or 2.1 channels at two 125W and one 250W
• Auto shutoff after 15 minutes of no signal
• Front panel zone, power, and network status LEDs
• Analog and digital RCA inputs

Related Questions and Answers

Q: 1. Does the power adapter can be plugged to a 220V outlet?

A: No. 110

Q: 2. How long the mini cable?

A: The included mini cable is 1.5 meters in length. (Just under 5 ft.)

Q: 3. I'll rephrase my earlier question: Does the "stereo/mono" button provide mono output?

A: Yes, when the MONO/STEREO switch is pressed in for the Rolls RA62C 6-Channel Headphone Amplifier, the right and left channels are summed together, providing a mono output signal.

Q: 4. Anyone using this with a turntable?

A: This integrated amplifier offers a dedicated RCA phone input for use with turntables without built-in phono preamps. Turntables with a phono preamp switch may be used also.

Q: 5. If your running a mono left and mono right output to the left and right inputs in the headphone amp, why in the world would I need to use TRS cables instead of regular 1/4 TS cables? I almost bought this until I saw the requirement of TRS cables. I've got plenty on hand but this doesn't make any sense to me. Even my mixer monitor outputs are regualar 1/4 left and right.

A: Check out Rane Note 110 - Sound System Interconnection from ranedotcomMike Rivers Article - Balanced and Unbalanced Connections from presonusdotcom (html and links not allowed in replies)Can be confusing, but worth understanding. Cheers...

Q: 6. The unit won't turn on?

A: If the unit is not receiving power and the LED indicator is not lit, it is possible either the included power supply or the unit itself is defective. Please contact a Representative in our Pro Audio Department for support here at 800-606-6969. In addition our Customer service Department can assist you with an exchange or return if necessary. Please call 800.221.5743 or email cs@a href= http://bandh.com target= _blank bandh.com/a

Q: 7. Hi! Will this work with Zoom H6?

A: You may need 1/4 to 1/8 adapters but yes it will work!

Q: 8. can i connect this directly to headphone out of my mixer? or there's a better way to connection? thanks

A: Yes you connect it but you have to use the right cable .

Q: 9. Can you use this with a power bank?

A: The Samson QH4 4-Channel Headphone Amplifier requires 15V DC and most power banks do not supply that amount of voltage. We recommend using the included power supply.

Q: 10. Power Supply for 110v or 220v ?

A: The power supply is marked 12O Volt 60 Hz. ..so, no, it won't work on 220-240. However, the output is marked 12V dc 150mA. The connector on the end of the cord is the standard small item plug that fits all kinds of small electronic items, including external hard disk enclosures. There are MANY inexpensice power supplies on the market (or you may have some lying around) that put out 12v dc and at least 150 mA. If you find one that puts out more than that, is should be just fine. ...just not lower than 150mA. You do need decent quality to prevent hum. B&H may sell one, or look on eBay. ..for a p.s. that for input 110 and 240 Volts, and 50 / 60 Hz. ..so you can use here (U.S.) or in Europe, wherever. The sound from this compact amplifier is quite clean. i use for video voice over, and have NO complaints.