User manual CREST AUDIO X-RACK XRM

[. . . ] owner's manual X-Rack XRM rack mount mixers 12 Output Monitor Mixer Important precautions 1 Save the carton and packing materials!Should you ever need to ship the unit, use only the original factory packing. For replacement packaging, call Crest Audio's Customer Service Department directly. XRM owner's manual Service Information Do not open unit!Opening the unit will expose you to potentially dangerous voltages. There are no user serviceable parts inside. [. . . ] If a signal is applied to just one of the input jacks and this switch is pressed, that lone signal will feed both sides of the channel and it will be treated as a mono signal throughout the mixer. p. 19 2 Stereo input channel Module STR LINE IN ( MIC PAD ) XRM owner's manual Controls 15 60 SUM INPUTS ­ 8 15 2K 1K K 600 400 8K 0 + 15 3K 5K 60 0 + HF 8 T 35 GAIN 20 40 15 60 SUM INPUTS ­ 8 15 2K 1K 600 400 ­ 8 15 500 500 300 15 500 1K 30 500 500 500 0 8K + 15 3K 5K 1 60 0 + HF 8 8 2 HF HM 8 8 100 ­ 8 15 ­ 8 15 0 0 2K + M LM 8 ­ 8 15 HM 8 8 15 + LF 8 15 8 15 500 500 1K 3 500 10 20 30 40 20 30 40 EQ ON S1 MIX SENDS 500 500 500 500 500 500 300 PRE ­ 01 + 3 S T R 2 30 4 2 30 4 · 10 6 ­ 02 + 3 6 ­ 03 + 3 S T R 100 2K 0 + M 8 ­ LM 8 · 10 20 30 40 20 30 40 2 30 4 2 30 4 · 10 6 ­ 04 + 3 6 ­ 05 + 3 S T R 15 15 0 + LF 8 15 LF 8 ­ · 10 20 30 40 20 30 40 2 30 4 2 30 4 · 10 6 ­ 06 + 3 6 ­ 07 + 3 S T R 15 · 10 2 EQ ON S1 MIX SENDS 20 30 40 20 30 40 2 30 4 2 30 4 · 10 6 ­ 08 + 3 6 ­ 09 + 3 S T R PRE · 10 Block diagram FADER GAIN - 60 dB PO FAD LEVEL FREQ LEVEL FREQ LEVEL LEVEL MUTE 20 30 40 20 30 40 2 30 4 2 30 4 · 10 6 ­ 0 10 + 3 6 ­ 0 11 + 3S T R · 10 20 30 40 20 30 40 2 30 4 2 30 4 SUM MONO · 10 6 ­ 0 12 + 3 6 · EQ ON LF 80 HZ LOW MID 80 - 2 KHZ HI MID 400 - 8 KHZ HF 12 KHZ MUTE S1 CHAN LEVEL ­ 0 + 5 10 CHAN LEVEL FADER AMPS LEFT +10 FOUR BAND EQ - LEFT 2 30 4 10 20 30 40 · PK SIG PRE EQ +10 LF 80 HZ LOW MID 80 - 2 KHZ HI MID 400 - 8 KHZ HF 12 KHZ PFL RIGHT FOUR BAND EQ - RIGHT PUT EAMP YES PRE SOURCE MUTE ? p. 20 Stereo Input channel Front panel features Stereo EQ The Stereo Input channel has two parallel EQ circuits that are controlled by the same set of knobs. It is functionally identical to the Mono Input EQ. Many audio signals coming into the console require some degree of corrective eq in order to be part of a good sounding mix. XRM offers a 4-Band EQ on each channel. The input EQ consists of the bands: High, High-Mid, Low-Mid and Low. The High and Low frequency bands are shelving equalizers, each have a boost/cut control and their frequencies are fixed. The High-Mid and LowMid bands have a bell-shaped response, each band features variable boost/cut and adjustable frequency. high frequency--HF Boost / Cut 15dB boost and cut. Shelving @ 12 kHz high mid--HM Frequency Continuously variable between 400 Hz and 8 kHz. Bell curve with a BW of approx 1. 5 octaves Low mid--LM Frequency Continuously variable between 100 Hz and 2 kHz. Bell curve with a BW of approx 1. 5 octaves Low frequency--LF Boost / Cut 15dB boost and cut. This switch is used to activate the EQ section and can be used to make A/B comparisons between "flat" and eq'd signals. 2 p. 21 0 500 500 500 500 500 500 500 500 500 500 2 Stereo input channel Module HM STR LINE IN ( MIC PAD ) XRM owner's manual Master Faders STR PAIR LO CUT STR PAIR LO CUT Chan Level 20 30 40 20 30 40 0 + 3 2 S T R Chan Sends 3 EQ ON S1 MIX SENDS 1­2 2 3­4 35 GAIN 20 40 · 10 500 15 60 500 SUM INPUTS 500 500 500 500 K 10 5 ­ 8 0 6 ­ 0 12 + 3 6 PRE 2 3 20 30 40 20 30 40 10 ­ 01 + 3 S T R + HF 8 15 3K 5K 8K 1 60 8 15 2K 1K 600 400 ­ 8 15 500 500 300 0 LM 0 5 · 3 MUTE · 10 + HM 8 8 LF 10 S1 CHAN LE VEL ­ 0 + 5 3 10 6 ­ 02 + 3 6 ­ 03 + 3 S T R 15 500 1K 30 500 500 500 20 · 10 100 ­ 8 15 ­ 8 15 0 0 2K + S4 LM 8 30 10 20 8 15 + LF 8 15 S 20 30 40 20 30 40 8 1 3 S T R OUTPUT MASTERS PK SIG 30 40 · PK SIG · 10 EQ ON S1 MIX SENDS 1 2 3 4 6 ­ 04 + 3 6 ­ 05 + 3 S T R PRE 10 20 30 40 20 30 40 ­ 01 + 3 S T R 2 3 2 30 4 AFL PFL · 10 · 10 6 ­ 02 + 3 6 ­ 03 + 3 S T R STR PA R 2 30 4 O CUT STR PA R O CUT 20 30 40 20 SOLO LEFT · 10 Block diagram PFL 20 30 40 20 30 40 2 30 4 2 30 4 · 10 · 10 6 ­ 04 + 3 6 ­ 05 + 3 S T R UT MODULE AVAILABLE PRE FADER TO PEAK CIRCUIT 6 ­ 06 + 3 6 ­ 07 + 3 S T R · 10 30 40 SOLO RIGHT · 10 20 30 40 20 30 40 2 30 4 2 30 4 · 10 6 ­ 06 + 3 6 ­ 07 + 3 S T R SOLO DC POST FADER LEVEL LEVEL MUTE MIX 1-4 PRE MIX SENDS 1 & 2 LEV__LEV / LEV / PAN SWITCHING CHAN LEVEL FADER AMPS MIX SENDS 3 & 4 LEFT +10 LEV__LEV / LEV / PAN SWITCHING M3 M4 M1 M2 20 30 40 20 30 40 · 10 · 20 30 40 20 30 40 2 30 4 10 · 10 6 ­ 08 + 3 6 ­ 09 + 3 S T R EQ ON 2 30 4 6 ­ 08 + 3 3 6 ­ 09 + 3 S T R MID 8 KHZ HF 12 KHZ · 10 · 10 EFT 2 30 4 2 30 4 20 30 40 20 30 40 20 30 40 · 10 6 ­ 0 10 + 3 6 ­ 0 11 + 3S T R +10 MID 8 KHZ HF 12 KHZ 3 · 10 RIGHT MIX SENDS 5 & 6 LEV__LEV / LEV / PAN SWITCHING M5 M6 · GHT 2 30 4 2 30 4 0 20 30 40 10 20 30 40 20 30 40 6 ­ 0 10 + 3 3 6 ­ 0 11 + 3S T R · 10 6 ­ 0 12 + 3 6 · YES PRE SOURCE MUTE ?PRE FADER LEFT PRE EQ PRE FADER RIGHT PRE EQ PRE-SOURCE SELECT PRE-SOURCE BUFFERS PRE FADER NO LEFT SUM MIX SENDS 7 & 8 LEV__LEV / LEV / PAN SWITCHING M7 M8 · 10 MUTE S1 CHAN LEVEL ­ 0 + 5 10 20 30 40 3 10 20 30 40 2 30 4 MIX SENDS 9 & 10 LEV__LEV / LEV / PAN SWITCHING M9 M 10 · 10 · PK SIG 20 30 40 6 ­ 0 12 + 3 3 6 PFL · RIGHT MIX SENDS 11 & 12 LEV__LEV / LEV / PAN SWITCHING M 11 M 12 MUTE S1 CHAN EVE p. 22 Stereo Input channel Mix Send features The XRM is capable of generating 12 mono mixes, 6 stereo mixes, or a combination of both mono and stereo mixes. Each of the six Odd/Even pairs of sends can be configured as a stereo pair- the Odd pot becomes the level control, the Even pot becomes the pan pot. The changeover to stereo operation is controlled by the STR PAIR switches located above the master faders. A LO CUT switch is also present for activating the hi-pass filter (40Hz, -18dB/oct) for each pair of mixes. NOTE: The Stereo Channels differ in how they feed the Mix Sends. With the Mono Channels, there was only one source within the channel, so the feed to any Mix Send pot is always the mono source. Switching to Stereo-Pair operation simply took this mono source and allowed it to be panned across the odd and even buses. In the Stereo Channels, there are two signal sources, the left and right channel signals. Normally, a sum of these two signals is fed to the Mix Send pots; a pre-fader sum is also generated for use with the Mix 1-4 PRE switch. When the corresponding STR PAIR switch is depressed, the operation AND THE SOURCE of the Mix Sends change. The odd pot still becomes the level control for both buses, but the even pot is now a BALance pot. The feed to the buses changes from a summed mono feed to both sides, to a left-to-odd and right-to-even feed. The stereo signal within the channel is maintained as it is fed to the stereo-paired mix buses. If the SUM INPUTS switch is depressed, the stereo signals within the channel effectively become mono and the Mix sends behave the same as on a Mono channel. Mix 1 - 4 PRE MIX Sends 1-4 are Post-Fader MIX Sends 1-4 are Pre-Fader Normally, the signal feeding the Mix Sends is derived after the main Chan Level Pot (Post-Fader). This Chan Level pot controls the level of the chan signal feeding the individual Mix Send pots. Each Mix Send pot is then used to generate a sub-mix of this channel signal. This Post-fader signal is also affected by the Mute switch; if the channel is muted, the Mix Send no longer receives a signal. There are some cases where an independent mix is desired, the operator doesn't want the Chan Level to affect the signal. On the XRM, Mixes 1 thru 4 can be switched to receive their signal PRE the Chan Level pot (Pre-fader). The default PRE setting for Mixes 1-4 is pre-fader, but it is still post-insert/postEQ/post Mute. An internal jumper (per channel) can be changed so that the PRE setting becomes either pre-insert or pre-EQ. Another jumper allows this PRE setting to additionally be independent of the channel mute. Mix Sends 1 & 2 Levels for Mixes 1 and 2 are controlled by this pair of knobs. In MONO mode, each knob controls the amount of chan signal that is sent to its corresponding mix bus. [. . . ] From the stereo source, the left signal will feed all of the odd mixes, the right signal will feed all of the even mixes. Both XLR and 1/4" TRS jacks are provided, the XLR jack is normal'd thru the TRS jack, so if a plug is inserted into the TRS jack, the XLR is disconnected. Electronically balanced input: 20K impedance XLR: Pin-2= Hot, Pin-3= Cold, Pin-1= Chassis XLR is normal'd to TRS jack (see diagram): TRS: Tip= Hot, Ring= Cold, Sleeve= Chassis Nominal input level is +4dBu 3 Monitor Output This output follows the Solo system and is controlled by both the HP/Mntr pot and SPEAKER ON switch on the front panel. The pot controls the audio level of both the front panel PHONES jack, and also these rear panel Monitor Out jacks. The SPEAKER ON switch enables these rear jacks while leaving the PHONES unaffected. These jacks normally would feed the engineer's monitor system if something more than headphone listening was desired. Both TRS and XLR jacks are provided, they are wired in parallel, and both sets may be used Electronic balanced cross-coupled output: 100 impedance (50 per leg) XLR: Pin-2= Hot, Pin-3= Cold, Pin-1= Chassis TRS: Tip= Hot, Ring= Cold, Sleeve= Chassis Nominal output level is +4dBu. p. 37 3 Master section Solo Link Connectors Tie Mixers together SOLO LINK Professional Audio Products Designed and Built in the USA XRM owner's manual AC Inlet Information and warnings X-RACK RACK-MOUNT MIXER P O W E R ON IN OUT Use 5-Pin DIN cable to interconnect SOLO Systems of X-Rack Mixers Crest Audio Inc. [. . . ]