Some turntables will need a preamp before being connected and others may have one built-in. Check the turntable manufacturer’s website or user manual.

While the HD3 has a fantastic 24-bit DAC, you can always run your own external DAC to the speakers by connecting to the analog inputs.

Some computer headphone outputs have poor audio quality, so if this is your computer, try connecting from the USB port to your with HD3 or connect wirelessly via Bluetooth.

Setting up your Bluetooth turntable with your Bluetooth-ready Audioengine speakers/components should be simple! First, you would also need to make sure your Audioengine Bluetooth device is on, in pair mode (LED light flashing), and near the turntable. Next, you would need to use the pairing button to send the turntable into pairing mode. Depending on the turntable, you will need to either press and release the turntable's pair button or press and hold it; for example, on the Audio Technica AT-LP60-BT you would need to hold the turntable's pairing button for about two seconds, until the light flashes different colors. Once the turntable is in pairing mode, it will search and connect to the nearest available Bluetooth device. Once the turntable if paired and connected to your Audioengine Bluetooth device, the pair light on the receiver should turn solid.

If the Bluetooth LED is illuminated orange that means you are streaming in aptX HD which is a higher grade of Bluetooth signal.

If you’ve connected your turntable to your speakers and the volume is low, one of two situations may be happening:

If you have a turntable with a built-in phono preamp, such as the Audio-Technica ATLP120 or the Music Hall USB-1, the output may be in the wrong setting. Double check and make sure the switch is set to “line” instead of “phono.” Be careful to keep the volume of your speakers low as it can be quite loud if you had to switch it to "line".

Your turntable could also not include a built-in phono preamp, such as older turntables. If your turntable does not include a built-in preamp, you will need to add an external preamp to bring the signal up to a line level signal. We don’t have any recommendations on a particular brand or model preamp to use with this setup.

You may have a loose volume pot.  This can happen when the nut that holds the volume pot in place becomes loose.  This can be easily accessed and tightened without opening the speakers up.  Try this:

1) Pull the plastic volume knob off the volume pot.  Depending on how tight it's on, you might be able to pull it off with just your fingers. If not, you may need to cover the knob with a soft cloth and pull out with pliers.

2) Use a deep well 10mm socket (or socket driver) to tighten the nut around the volume pots shaft.

3) Press the plastic volume knob back over the volume pot's shaft, and retest.

This is normal. The HD3's USB interface can only accept a 16-bit format; however, the HD3's DAC will automatically pad the bit depth to 24-bit internally during playback, for lower noise and better dynamic range.

Absolutely! This is especially useful for connecting wired with newer iPhones that do not have a headphone jack output. You will need to pick up the USB Camera Adapter from Apple, which allows a USB connection to the iPad (and, as of iOS7, the iPhone). Then just hook up as you would from a computer. If you'd like to be able to charge your iPhone or iPad while you use them like this, you can use the USB 3 version of Apple's USB camera adapter, which also allows passthrough charging at the same time.

The HD3 speakers do include detachable magnetic grills. The grills have thin rubber pads to prevent marks or damage to the finish or the cabinet, so your HD3s will keep looking great even if you like to remove / replace them frequently!

The HD3's USB interface handles up to 16-bit, and sample rates up to 48kHz, though the bit-depth will be padded internally to 24-bit. Your system will generally default to these settings when you hook up the HD3. If you mainly use 44.1K files, you might set this as the default in your system to ensure minimal sample-rate conversions. Many system players like JRiver and Amarra will default to the proper sample rate automatically.

You should be able to use multiple sources with the HD3s just fine. The analog inputs on the HD3 are always active. They will play at the same time as the Bluetooth or USB input. Bluetooth and USB share the DAC though, so you can only listen to one at a time, and Bluetooth takes priority. If you're using USB for example, and start using Bluetooth, USB will mute and Bluetooth will take over. If you pause or disconnect from Bluetooth the speakers will automatically switch back to USB after a few seconds.

The HD3 includes a speaker wire with banana plugs on either end, so using them with the speakers should be a simple set up. The binding posts on the back of each speaker would need to be screwed down and the plugs would need to be inserted into the center hole (please refer to the picture for reference). You would need to make sure that each end matches with the color on the corresponding binding post; for example, if you inserted the red banana plug into the red binding post on one speaker, the same would follow suit for the other speaker. The spring style banana plugs provided with the HD3s may look like they won't fit, but they will actually compress to fit into the posts on the speakers, so some amount of effort will be needed to insert them.