User manual CREST AUDIO HP-EIGHT

[. . . ] HP-Eight Owner's Manual HP-Eight Owner's Manual Model Number : Serial Number : opt- PSU Serial Number : Owner : Purchase Date : Dealer Name : Dealer Number : Install Date : Installed By : Contact Number : Intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. Intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. CAUTION: Risk of electrical shock -- DO NOT OPEN!CAUTION:To reduce the risk of electric shock, do not remove cover. [. . . ] If the PRE button is pressed, the signal to the Matrix Send pots is pre-fader/pre-mute. This allows a totally independent output mix to be created, the group fader level will not affect the Matrix mix. The overall level of the entire Matrix mix is controlled by the Matrix Masters, located at the far right of the Master section. See Matrix section for further matrix information NOTE:These following controls are ALWAYS fed from the Group audio signal, the Fader-Flip switch does not affect their function. Matrix Sends M1 & M2:Always fed from post-level/post-mute Group audio, or in PRE position, from the post-insert/pre-level/pre-mute Group audio. Group Pan: Always fed from the post-level/post-mute Group audio. Bus Assignment Mono & L-R: Always fed from the post-level/post-mute Group audio. Use the Matrix Sends to create additional mixes from the 11 main buses (8 Groups, Left, Right & Mono). These additional mixes can be tailored to suit a specific need, only mix-in the signals you need, or enhance the main-mix by adding additional instruments where needed. ® Creating additional mixes. There is yet another way to create additional output mixes from the Console, but it involves using an external mixer (an XR-20 or XRM would be nice). The Groups have their own TRS output jacks that feed the postfader/post-mute group audio to the outside world. These group outputs can be fed into an external mixer where they can be combined into as many outputs as the external mixer is capable of providing. In effect, you are using the external mixer to create additional "Matrix mixes". Internally, you were limited to the 2 Matrix sends (M1 and M2), but externally, you no longer have this limit. The main difference is the feed to the matrix sends: internally, you could choose Pre or Post, externally (using the Group-Out TRS jack) you only have Post available. However, the Group Insert jack can be used to derive a pre-fader signal for use with an external mixer if the Tip and Ring contacts are tied together in the cable plug. This creates a "borrow-cable" that allows the signal to still flow through the internal audio path of the group, but allows the pre-fader, insert-send signal to be used as an external feed. If you need more than the internal two-matrix mix, you can use the outputs of the console to create additional mixes externally. Use the 11 main buses (8 Groups, Left, Right & Mono), plus any of the 10 Auxes. These additional mixes can be tailored to suit a specific need; only mix-in the signals you need, or enhance the main-mix by adding additional instruments or vocals where needed. ® p. 41 3 groups - rear panel block diagram INTERNAL RIBBONS AND INTERCONNECTS HP-Eight owner's manual HP-Eight Group (1 of 8 Shown) GROUP (1-8) MIX AMP MONO GROUP ASSIGN TO MONITOR CIRCUITS MUTE L-R GROUP PAN PEAK SIG GROUP INSERT -2dBu MATRIX SENDS M1 +10 PRE LEVEL GROUP LEVEL GROUP OUT +4dBu GC M2 AFL METER FEED (POST FADER) FADER FLIP AUX INSERT -2dBu AUX (1-8) MIX AMP TO MONITOR CIRCUITS AUX LEVEL SIG AFL PEAK +10 AUX OUT +4dBu GC LEFT (R) Master rear panel MAIN OUTPUTS MONITOR MATRIX 8 7 6 GROUP OUT PU T S 5 4 3 2 1 L STEREO LINE & TAPE INPUTS R L (MONO) R (MONO) L 1 OUT OUT INSERT INSERT INSERT INSERT LEFT INSERT L R STEREO LINE INPUT 1 L (MONO) R R 2 STEREO TAPE INPUT A L R STEREO LINE INPUT 2 RIGHT INSERT INSERT INSERT INSERT INSERT INSERT L (MONO) R L (MONO) R 10 MONO M - XLR +4dBu 100 Electronic Balanced 1 3 9 8 7 SERIAL NUMBER 6 5 4 3 2 1 STEREO TAPE INPUT B STEREO LINE INPUT 3 T= IN + R= IN ­ S= CHS INSERT 2 1= CHS 2= OUT + 3= OUT ­ AUX OUTPUTS T= Out+ R= GND (50) S= CHS TRS +4dBu · 50 Ground-Comp Impedance Bal T= Send R= Rtn S= GND TRS -2dBu Unbal Send · 50 Unbal Rtn · 15K L R RCA Jack -10dBV 10K Unbalanced Main Outputs Professional Audio Products Grp·Aux Outputs Bus Inserts Tape In Line Input TRS +4dBu 10K Electronic Balanced group connectors (on Master rear panel) GR OUP OUTPUTS 8 7 6 5 4 3 2 1 INSERT INSERT INSERT INSERT p. 42 groups 3 group connectors- rear panel The HP-Eight group output connections are located on the Master rear output panel. Each group features a 1/4" TRS output connector, along with a 1/4" TRS Insert connector. The output is a ground-compensated, impedance-balanced TRS jack. For wiring purposes, treat this connector exactly like a balanced output. When connected to a balanced input, that input will see equal impedance on each leg. When connected to an unbalanced input, the ground-compensation circuitry will act to reduce the ground-signal differences between the console and the remote gear. The TRS Insert jack is wired as Tip=Send, Ring=Return, Sleeve= Audio Gnd. This is the "industry-standard" wiring scheme for most single-jack inserts. The Insert send-point is located directly after the group mix amp, the Insert return feeds the top of the group fader, or the top of the level pot if Fader-Flip is active (see Block Diagram). group output 1/4" TRS jack The group output signal is available at this output jack. The output jack is impedance-balanced, ground-compensated. Tip is +Drive, Ring is -Drive Return, Sleeve is Chassis Ground. Send (Drive) impedance is 50 Ring impedance is 50 to Audio Ground Nominal Operating Level= +4dBu Max Output Level= +21dBu (into 2k or higher) + NOTE: The Fader-Flip switch does not change the function of any of the rear-panel jacks. The Group Output and Insert jacks are always located here. Similarly, the Aux Output and Insert jacks always retain their same function. insert jack 1/4" TRS jack This switching 1/4" TRS jack allows an external signal processor to be inserted into the signal path of the group. The tip carries the SEND signal from the group, and the ring carries the RETURN signal back to the group. The Insert-Send point is located directly after the group mix amp, the Return comes back at the top of the group level control. [. . . ] # 2 and #3 differ only in their implementation. Both depend on an external supply (plus DC cable) to take over if the internal supply fails, but differ in the philosophy behind their operation. For method #2, the External supply is always connected to the HP-Eight and is powered-up whenever the HP-Eight's internal supply is on. If the internal supply fails, the external supply takes over immediately without any operator intervention or audio interruption. The same thing happens if the external supply fails, the internal supply keeps the console operating. [. . . ]