The JBL LX 400 is a floor-standing speaker that features a well-designed cabinet to enhance acoustic performance. It is part of the LX series, which is known for its ability to deliver clear and powerful sound reproduction. The LX 400 is equipped with a 12-inch woofer that provides deep bass response and a 4-inch midrange driver for a balanced mid-frequency presence. High frequencies are managed by a 1-inch soft dome tweeter, allowing for a smooth and detailed treble. The speakers have a sensitivity rating of approximately 91 dB, making them efficient and able to produce a good sound level with moderate amplification. Their frequency response ranges from about 30 Hz to 20 kHz, allowing for a wide range of audio output suitable for various genres. The LX 400 is typically available in a wood veneer finish that adds an aesthetic appeal, while the design includes a front-facing bass port for better low-frequency performance. Additionally, the speaker features adjustable metal spikes that help with stability and isolation from floor vibrations.
