The Fostex PX-6 is an active, near-field monitor with a ported bass-reflex cabinet that features a 6.5" woofer driven by a 50W amp and a 1" soft-dome tweeter getting 28W. A multimode knob is used to set the volume level as well as adjust the DSP-based high- and low-frequency EQ response (using a FIR-style filter). The analog inputs include an XLR/TRS combo jack and an unbalanced RCA input—fitting for studio and DJ-style setups. The monitor also has a fade-in circuit that gradually raises the output level when you switch on the power.
A highpass filter set at 85 Hz can be switched in when the PX-6 is used with a subwoofer, and you can adjust the phase of the monitor to correct for any timing differences that result. (The manual gives detailed setup instructions for phase adjustment.)
I was impressed with the PX-6’s clean sound reproduction, and the solidity of the phantom center image speaks well for the monitor’s phase coherency. I heard none of the grating high-frequency distortion afflicting many affordable small monitors.
However, the frequency response did not sound at all flat to me. Bass and, especially, vocals were pushed out front. Boosting high frequencies with the onboard EQ helped smooth out the high end a bit. Consequently, it may take some time to learn how to do mixes on the PX-6 that translate to other environments. (The frequency response chart in the manual shows 48 Hz to 20 kHz, though no tolerances are given and the response plot uses 10dB divisions, so the spec is approximate.)
On the other hand, the PX-6 was not at all fatiguing to listen to for long periods. Overall, the PX-6 is a clean monitor with a small footprint that makes it easily transportable, as well.