The Audioengine HD4 powered Bluetooth speakers in black are a great choice for high - quality audio. They feature a mid - sized design with an extra - loud output and 120W peak power. These speakers come with a built - in amp, so you don't need an external amplifier. Positioned between the full - sized HD6 and the compact HD3 in terms of power and size, they offer a balanced performance. The 4' aramid fiber woofer and 0.75' silk dome tweeters with neodymium magnets and advanced voice coils ensure excellent sound quality. With aptX Bluetooth 5.0 connectivity, it has an expanded range and is HD capable. An upgraded PCM 5102 DAC provides high - quality digital conversion for both Bluetooth and USB inputs. You can connect a turntable via the RCA input (a phono preamp might be needed) or a computer via the USB input. There's a convenient front - panel headphone jack and volume/power knob. The removable, magnetic speaker grills are a nice touch. The 18mm thick MDF cabinets with real wood veneer and furniture - grade finish look great. All necessary cables are included, and it's also available in walnut. The HD4 offers wired or wireless connections, giving you access to all your music on any app or device. Key features include an analog dual - class A/B amplifier, 120W peak power total, multiple inputs (3.5mm mini - jack, RCA L/R, USB, Bluetooth aptX), and outputs (variable line - out RCA output, stereo mini headphone output). The drivers are 4' Kevlar woofers and 3/4' silk dome tweeters, with a frequency response of 60Hz - 22kHz ±1.5dB. Each speaker measures 9'h x 5.5'w x 6.5'd (23 x 13.9 x 16.5cm) and weighs 10 lbs (4.53 kg) in total. What comes with it? L+R speakers, a Bluetooth antenna, an AC power cord, speaker wire, a mini - jack audio cable, an RCA audio cable, a USB cable, cloth speaker bags, a cloth cable bag, and a setup guide.
Using the Audioengine HD4 speakers is easy. First, unpack all the items from the box, which includes the speakers, cables, and accessories. Connect the speakers to a power source using the provided AC power cord. You can connect your devices in different ways. For a computer, use the USB cable. If you want to connect a turntable, use the RCA cable (you may need a phono preamp). You can also connect your phone wirelessly via Bluetooth. Just turn on the Bluetooth on your device and pair it with the speakers. Adjust the volume and power using the front - panel knob. When using the headphone jack, you can enjoy private listening. For maintenance, keep the speakers clean by gently wiping them with a soft, dry cloth. Avoid exposing them to extreme temperatures or humidity. If the speaker grills get dirty, you can remove them and clean them separately. Store the speakers in a safe place when not in use, and keep the cables organized in the provided cable bag.
