The CEQ215 is a 19" rack mounted dual 15-band graphic equaliser, which allows the adjustment of labelled frequencies via the individual cut/boost faders. Up to 12dB of cut or boost for frequencies ranging from 25Hz to 16kHz for accurate audio spectrum control.

The Fostex FD4 is a hard disk multitracker without a hard disk. Pardon? You'll have to read on for the detail, but I'll say at the outset that the FD4 isn't weighed down with features (as some hard disk recorders are) and that Fostex seem to have struck a happy balance between features and usability in their new machine — they appear to have remembered that most potential purchasers will probably be complete novices in the recording arts.

• 2 Way Stereo, 3 Way Mono Crossover
• 19" Rack Mountable
• Butterworth Filters 18dB/Octave
• Continuously Adjustable Cut-Off Frequencies
• 40Hz Ultra Low Frequency Cut
• Phase Invert Function
• Inputs & Outputs via XLR

• Midi mixer to control virtually any DAW
• 8 individual line faders, 1 master fader
• 24 knobs, arranged 3 per channel
• 16 buttons arranged in 2 banks provide mute, solo and record arm functionality per channel
• Sends all mixer settings to the DAW with a single button press
• 1 to 1 mapping with Ableton Live (Ableton Live Lite included)

The Citronic CX34 is a 2-way or 3-way stereo or 4-way mono active crossover designed to split frequencies so that low frequencies are delivered to the amp driving the sub cabinets and mid/top frequencies are delivered to the amp driving the mid/top frequency cabs.

This type of system is more efficient and delivers more accurate sound quality, especially in larger PA systems.

Whilst primarily designed to deliver a more detailed sound, the Citronic CX34 also protects your equipment from overloading and avoids potentially blowing your mid/top speaker cabinets by sending the low frequencies just to the subs. 

The Citronic active crossover offers a user-friendly operation easily accessible when installed in a 19" rack cabinet. 

FEATURES

• Four input channels, each with gain, three-band EQ, and LED metering
• USB computer connection for playing and recording with Mac or PC
• Play music from music-player software
• Record your mix to your computer
• Multiple phono, line, and mic inputs
• Dedicated XLR mic channel and additional mic input on channel 4
• Replaceable crossfader with slope control
• Assign any channel to either side of the crossfader
• Class Compliant: this product is immediately compatible with every current and future version of Mac OS X and iOS and with Windows (98SE and up) operating systems.

This is a great tool for anybody who wants to minimize feedback in a live situation. Can be used in Auto Mode to identify frequencies that cause the feedback and eliminate it. Or there is a Manual Mode which allows you to dial in up to 24 frequencies and tweak the bandwidth and gain yourself. 

• 8 total inputs
• 2 mic input channels with gold plated XLR and balanced line inputs
• 2 stereo input channels with balanced TRS jacks
• Extremely high head room offering extra dynamic range
• 3-band EQ on each channel
• 2 AUX sends pre-channel for external effects and monitoring
  Main output, control room, and headphone outputs

• 10-Channel Mixing Console
• Max. 4 Mic / 10 Line Inputs (4 mono + 3 stereo)
• 1 Stereo Bus
• 1 AUX (incl. FX)
• “D-PRE” mic preamps with an inverted Darlington circuit
• 1-Knob compressors
• High-grade effects: SPX with 24 programs
• 24-bit / 192kHz 2in / 2out USB Audio functions
• Works with the iPad (2 or later) through the Apple iPad Camera Connection Kit / Lightning to USB Camera Adapter
• Includes Cubase AI DAW software download version
• Cubasis LE for iPad available at App Store
• PAD switch on mono inputs
• +48V phantom power
• XLR balanced outputs
• Metal chassis

• 16 total inputs including XLR jacks w/ phantom power on ch. 1-4
• On-board Alesis digital effects with 256 variations
• Expanded channel count perfect for small groups or sub-mixes
• 4 mic input channels with gold-plated XLR and balanced line inputs
• Two stereo input channels with balanced TRS jacks
• High headroom circuitry offering extra dynamic range
• Ultra-low-noise discrete mic preamps
• 3-band EQ on each channel
• Footswitch input for effects on/off (sold separately)
• 2 aux sends per channel for external effects and monitoring
• 2-bus design with Main and Control Room 1/4†stereo outputs
• Aux inputs/outputs for external audio source integration
• Switchable phantom power