To minimize unwanted resonances and distortion, Audioengine cabinets have thick high-resin MDF walls with extensive internal bracing. Heavy internal sound-damping material is used to reduce unwanted sound reflections inside the cabinet. All cabinet edges are rounded which look great and reduce high-frequency diffraction effects on the front baffles. The HD4 cabinet contains tuned, front-port slots.
0.7″ (18 mm) thick MDF cabinets with real wood veneer0.75″ (20 mm) silk dome tweeters with neodymium magnets4″ (101 mm) aramid fiber woofers with advanced voice coils
Dimensions (HWD)Each speaker – 9″(23 cm) x 5.5″ (14 cm) x 6.5″ (16.5 cm) WeightLeft (active) – 7 lb (3.2 kg)Right (passive) – 5.2 lb (2.4 kg) Total Shipping Weight16 lb (7.3 kg) Shipping Box Dimensions (LWH)20″ (51 cm) x 13″ (33 cm) x 15.5″ (39 cm)
Headphone Amp TypeOPA2134 Full-scale Headphone Output Level2.0 V RMS Output Impedence2 ohms Recommended Headphone Impedence Level10 ohms to 10K ohms
Connector TypeMicro-USB USB Device ClassUSB 1.1 or above Input Bit Depth24 bit (padded) Input Sample Rate44.1 kHz/48 kHz
Internal D/A ConverterPCM 5102 Internal BT ReceiverN/A Input Bit Depth24 bit (padded) Bluetooth Receiver TypeBluetooth 5.0 Supported CodecsaptX HD, aptX, AAC, SBC Supported Bluetooth ProfilesN/A Wireless Operation RangeUp to 100 ft (30 m) typical Input Data RateDetermined by Bluetooth Wireless Latency~30 milliseconds (ms)
TypePowered Bluetooth aptX HD speaker system Amplifier TypeClass AB Rated Power Output: 30W RMS per channel (measured in compliance with 16 C.F.R. § 432.3)Peak Power Output: 60W per channel (AES)Total Peak Power Output: 120W (AES) Drivers4″ aramid fiber woofers 0.75″ silk dome tweeters Inputs3.5 mm stereo mini-jack, USB, RCA L/R, Bluetooth OutputsRCA variable line-out, 3.5 mm mini-jack headphone […]
The HD4 is equipped with a power-saving circuit that turns off the final stage of the speaker’s amplifier when no input signal is detected, so you can absolutely leave them on when not in use. This activates right after you stop playing music, and is instantaneous (as soon as the input signal stops and it […]
You can absolutely use your headphones with the HD4 speakers. The HD4’s have a built in headphone amp and a 3.5mm headphone jack located on the front of the powered speaker. When headphones are connected, the audio coming from the HD4 speakers will be cut out so as to not interfere with the audio coming […]
If looking for a desktop stand, our DS2 desktop stands are sized to fit the HD4’s almost perfectly. You can also use the Sanus Steel Series Speaker Stands, however the HD4’s do not have threaded inserts in the bottom of the speaker. Lastly, here is a list of stands our customers have recommended for wall […]
