On stage (or in the studio), XDR microphone preamps and VLZ give these mixers fantastic headroom, astonishing fidelity and an absolutely subterranean noise floor. The SR324 VLZ PRO has main and submix amplifiers that use distinctive negative gain mix architecture, which provides double the mix headroom of conventional designs. Four buses make live mixing a breeze because you can submix groups of inputs and then control them with one fader for example all of your background vocals or all your drum mics. The SR324 VLZ PRO has 28 XDR-equipped mic/line channels plus two special line level channels. Equalization on the SRVLZ PRO Series mixers is very versatile. Besides the fact that our Hi and Lo shelving EQ are centered at useful frequencies 12kHz, the SR324VLZ PRO has sweepable midrange EQ (on mono channels). You can center the midrange anywhere from 100Hz to 8kHz, low enough to use as a second low frequency EQ, and high enough to use in the high frequency range. (Stereo channels on both mixers have 4-band EQ, with 12kHz and 80Hz Hi and Lo shelving EQ, and two fixed mids at 3kHz and 800Hz.). A low cut filter (on mono channels) centered at 75Hz allows you to cut out mic thumps and wind noise that can enter your mix and rob you of amplifier power. The SRVLZ PRO Series mixers have six aux sends per channel, with the flexibility to handle multiple chores at once. Two of the aux sends are pre-fader, so you can use them for monitor sends during a live session. Two other aux sends are post-fader, which you would want for effects during studio tracking and mixdown. But get this: the final two aux sends are switchable to pre- or post-fader! So you can have 4 pre-fader aux sends, or 4 post-fader aux sends, whenever you need them. Along with great channel EQ, SRVLZ PRO mixers come with factory "Air." This peaking EQ circuit, centered at 16kHz, enhances guitars, vocals, percussion, whatever, giving a gentle "lift" to the extreme high end. Premuim XDR mic preamps4 submix buses6 aux sends (2 pre, 2 post, 2 switchable pre/post) 3-band EQ with sweepable mids (4-band fixed EQ on stereo channels)75Hz Low cut filter on all mono channels Talkback section with level control, LED, and separate rear XLR input"Double-bused" sub outs for eight track recording without repatchingInserts on all mono channels and subsBalanced XLR and 1/4" main outputs