Stereo channels | Behringer UB1832FX-PRO, UB2442FX-PRO, UB2222FX-PRO

EURORACK UB1622FX-PRO/UB1832FX-PRO/UB2222FX-PRO/UB2442FX-PRO

SOLO

The SOLO switch is used to route the channel signal to the solo bus (Solo In Place) or to the PFL bus (Pre Fader Listen). This enables you to listen to a channel signal without affecting the main output signal. The signal you hear is taken either before the pan control (PFL, mono) or after the pan and channel fader (Solo, stereo) (cf. chap. 2.3.10 “Level meters and monitoring”).

SUB (1-2 and 3-4)

The SUB switch routes the signal to the corresponding subgroups. The UB2442FX-PRO has 4 subgroups (1-2 and 3-4).

MAIN

The MAIN switch routes the signal to the main mix bus.

The channel fader determines the channel’s volume in the main mix (or submix).

2.2Stereo channels

2.2.1Channel inputs

Fig. 2.5: The various stereo channel inputs

Each stereo channel has two balanced line level inputs on jacks for left and right channels. Channels 9/10 and 11/12 on the UB2442FX-PRO feature an additional XLR microphone jack with phantom power. If only the left jack (marked “L”) is used, the channel operates in mono. The stereo channels are designed to handle typical line level signals, and, depending on model, have a level switch (+4 dBu or -10 dBV) and/or a line gain control. Both jack inputs will also accept unbalanced connectors.

LO CUT and MIC GAIN

These two control elements operate on the XLR connectors of the UB2442FX-PRO, and are used to filter out frequencies below 75 Hz (LO CUT) and to adjust microphone levels (MIC GAIN).

LINE GAIN

Use this control to adjust the line signal levels on channels

13-16 (UB2442FX-PRO only).

LEVEL

For level matching, the stereo inputs on the UB1622FX-PRO, UB1832FX-PRO and UB2222FX-PRO have a LEVEL switch to select between +4 dBu and -10 dBV. At -10 dBV (homerecording level), the input is more sensitive than at +4 dBu (studio level).

2.2.2 Equalizer stereo channels

The stereo channels contain a stereo EQ section. The cut-off frequencies of the high and low bands are 12 kHz and 80 Hz respectively, while the center frequencies of the high-mid and low-mid bands are 3 kHz and 500 Hz respectively.

The Hi and Lo controls have the same characteristics as the EQ in the mono channels. Both mid range bands are of the peak filter type. A stereo EQ is superior to two mono EQs on a stereo signal as two separate EQs will usually result in a discrepancy between left and right channels.

2.2.3 Aux sends stereo channels

In principle, the aux sends of the stereo channels function the same way as those of the mono channels. As the aux sends are mono, the send from a stereo channel is first summed to mono before it reaches the aux bus.

2.2.4 Routing switch, solo and channel fader

Fig. 2.6: Balance control and mute switch

BAL

The BAL(ANCE) control has a similar function to the PAN control in the mono channels.

The balance control determines the levels of the left and right input signals relative to each other before both signals are routed to the left/right main mix bus (or odd/even subgroup).

The remaining control elements in the stereo channels perform the same functions as their counterparts in the mono channels (MUTE switch, MUTE and PEAK LEDs, SOLO switch, SUB and MAIN switches and channel fader).

2.3 Interface panel and main section

Where it was useful to trace the signal flow from top to bottom in order to gain an understanding of the channel strips, we now look at the mixing console from left to right. The signals are, so to speak, collected from the same point on each of the channel strips and then routed to the main section all together.

2.3.1 MON control, aux sends 1, 2 and 3 (FX)

Turning up the AUX 1 control in a channel routes the signal to the aux send bus 1.

+As the UB1832FX-PRO is equipped with an additional monitor path, its first aux control in the channel strips is named MON. The console also has a dedicated MONITOR master fader for this aux path.

Fig. 2.7: The AUX SEND controls of the main section

2. CONTROL ELEMENTS AND CONNECTORS