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Description

The CS8 console has been designed to provide the consultant, contractor, installer and user with a cost effective system which will perform to accepted professional standards, be simple for the untrained user to operate, and be tolerant of wiring and installation problems. There can be no excuse for a system which is over sensitive to the wiring and installation conventions used, and hums at every opportunity. High quality balanced inputs and outputs are only part of the story. Equally important is the way in which the console grounding system works, because it is through the console ground that all the noisy ground currents from the cable screens will flow. Any part of the audio signal path which shares the cable screen to console ground path within the console will effectively have the cable screen noise added to that signal path. The current flowing in cable shields in typical installations has be shown to be substantial (in the order of 100mA and above) and is caused by the difference in potential between the ground connection at each end of the cable screens. Of comparable importance to any system performance is the power supply. Internal linear power supplies may be less expensive, but are usually responsible for inducing noise into the audio and generating substantial amounts of heat, making it uncomfortable for the operator. Internal switch mode supplies may be cool running, but are usually even more of a problem with regard to noise. Another often overlooked point with internal power supplies is how to provide auto-switchover between 2 supplies without extensive modification thereby nullifying the warranty. Internal supplies are also a potential problem from a maintenance point of view. Most service technicians can easily fault find and repair a linear supply with commonly found components, but a switch mode supply does not make use of common off the shelf components. Although more expensive, a separate and generously rated linear power supply is used with the CS8 keeping heat and noise away from the console. Rack mounting ears are available for permanent installations, and the supply is UL and CSA approved. At this point it is useful to look at some of the features of the CS8. PAN AND ROUTING The pan pot can be switched between stereo panning mode, and left/centre/right panning mode. Left-centre-right panning to the master outputs provides much improved spatial positioning. The technique has been used for many years in the film industry where its benefits are well known. In music systems the centre channel generates a more solid centre image, especially for the “star” of the show, and helps to maintain a stereo image across a wider sound stage. In mixed media productions and in church applications the use of a speech optimised centre cluster can improve intelligibility without compromising the music system performance. If only a stereo system is being run, and the pan pot is switched to stereo mode, then the centre output is individually assignable from each input or the from a sum of the left/right mix to provide a separate mono output for broadcast/film feeds etc. Another unique feature for a mixer in this class is individual sub group routing instead of the inconvenient and inflexible paired routing which always requires the use of the pan pot to route a channel to a single sub group. There is always a crosstalk performance compromise involved and it is done solely for economic rather than for operational reasons, as it halves the number of routing switches and removes the need for a pan in/out switch. The CS8 allows routing to the sub groups either individually or in pairs via the pan pot. EQUALISATION The CS8 input module has a 4 band equaliser with high and low frequency boost/cut controls and two swept frequency middle sections. There is more than two octaves of overlap between the frequency ranges of the mid equalisers while the frequency span extends to from 70Hz to 10kHz. AUXILIARIES The CS8 has 8 full time auxiliary send controls allowing easy session setup. These are normally post fade but can be switched pre fade. Normally the pre fade signal is pre fade post cut but byusing internal links it can be changed to the pre equaliser signal. Auxiliaries 7 and 8 can be used in stereo where stereo foldback, for example, is required. CHANNEL CUT The channel cut is a silent FET switch which can be remotely controlled through a connector on the rear of each channel by a simple connection to ground. In addition, when the channel cut switch is pressed, another contact is grounded on the Mute Remote connector. This can be used to control a Midi Mute controller, cue lights, or even to control another channel on the mixer by linking the mute out pin of one channel to the mute in pin of any other channel(s). Such an application could be a podium switch which would allow the speaker to override other channels for example. SOLO/PFL MONITORING While it is normal to find PFL/AFL on almost all mixers, the CS8 goes a step further. The input solo is arranged to have priority over the output solo. This means that there is no need to de-select an output solo when selecting one or more input solo controls, and when the input solo is released, the output solo is re-established. A master solo level trim control is located on the master module for level matching, and the level of the solo signal is displayed on the left mix bargraph. An additional solo feature provided is Solo In Place. In this mode, soloing any input channel will cause all other input channels to be cut, thereby allowing only itself to be heard in the mix, correctly panned and at the right level, along with any stereo effect return channels. This is of great benefit during set-up and rehearsal and is much more useful than the standard PFL. A switch on the master module selects Solo In Place mode. SIGNAL LED’s The value of effective metering of signal levels throughout the signal path cannot be overestimated. Signal present and 0dB LED’s on all input channels give confidence to the operator while peak overload LED’s indicate when the channel is being driven close to clipping. However, it is unusual to find a peak overload LED at the very place where it is most needed, at the summing bus mix amplifiers, operating independently of the output meters. If the mix amplifier is overloaded and starts to clip, the only thing that can be done to rectify the situation is to pull down all input faders. On the CS8, there are overload warning LED’s on each of the sub group mix amplifiers as well as on the left, centre and right mix amplifiers. When the output meters are switched to observe the matrix outputs the bus peak leds also monitor the matrix bus. INSERTS Inserts are used to patch in external pieces of equipment such as equalisers, limiters etc. and are provided on all channels, group outputs, mix outputs and auxiliary outputs. To be useful and useable, the inserts should be at a level which is compatible with this external equipment. Sadly, this is often not the case. Some mixers have inserts at odd levels which will preclude their efficient use because of the noise penalty. All inserts on the CS8 are at a consistent level which is at the internal operating level of 0dBu. AUXILIARY INSERTS In most installations, it is quite normal to place an equaliser in the stage monitor sends, but this is normally external to the mixer. This of course means that the only way of listening to the monitor sends (internal to the mixer) is via the solo system. Herein lies a problem. The operator does not hear the effect of the external equalisation. Also, any noise introduced by the external device is constant and not proportional to the setting of the send control. The ideal place to insert an external device is pre the send master control and this is the case in the CS8.

Discussions

Andromeda Users - Past and Present

You are the biggest A6 fanboi on the planet. In every thread. And I hate to feed this, but right now I have three 61 key keyboards setup, and the A6, P12, and Solaris are the three. At the expense of a Prophet 5. I might swap that in in place of the P12 now...

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Buying a mixing console

...overwhelming. What's on the market at this point is: Midas venice 320 32 ch Soundcraft Venue theatre 2 32 ch Soundcraft Theatre K3 32 DDA CS8 32 ch Anyone with any info, advice would be highly aprciated. I'll be mixing to 16ch of tape, if that plays any part of the recomendations.

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DDA questions

...a sign that it's time to recap? Also, does anyone know if the channel strips from a CS3 or CS8 console will fit into a D series? Thanks! -joebass

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