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Summary of Contents for Professional Sound Corporation M 8
- Page 1 M 8 MIXER MANUAL Operation Manual V1.0 Copyright 1998 Professional Sound Corporation...
- Page 2 Professional Sound Corporation product line. Additionally, our world wide network of dealers have been carefully chosen to provide you with the best possible product support. In addition to our own line of products, Professional Sound Corporation is a Master Distributor for the Electro-Voice line of Broadcast Microphones. These exceptionally rugged microphones are used extensively throughout the ENG, television and radio industries and have set the standards by which others are judged.
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Page 3: Table Of Contents
Copyright 1998 Professional Sound Corporation, all rights reserved, no portion of this manual may be reproduced or used for commercial purposes without the express written permission of PSC. Entire contents, descriptions, specifications and photos are the exclusive property of PSC. PSC, the PSC logo, and M8 are registered trademarks Professional Sound Corporation. - Page 4 5.01 LCD METERS PAGE 13 MONITOR SPEAKERS: 6.01 POWER AMPLIFIERS PAGE 13 6.02 INTERNAL SPEAKERS PAGE 13 6.03 EXTERNAL SPEAKERS PAGE 14 6.04 DRIVING EXTERNAL AMPLIFIERS PAGE 14 CONSTRUCTION: 7.01 CHASSIS PAGE 14 7.02 CIRCUITRY PAGE 15 7.03 COMPONETRY PAGE 15 MODIFICATIONS 8.01 MIXER MODIFICATIONS...
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Page 5: Input Section
INPUT SECTION: 2.01 TRANSFORMER INPUTS The M8 mixer uses a transformer coupled input preamp design topology. Transformer coupled inputs were chosen for their "forgiving" abilities in field production. First and most importantly, they provide a high level of galvanic isolation which simply stated, means your equipment and you may live should the M8 inputs come into contact with incompatible sources (high voltages!). -
Page 6: Input Levels
microphones can easily power them from the M8 Mixer using a phase inverting barrel (PSC part # FPSC0010C) or a phase reversing cable (PSC part # FPSC1017). Page 2 Dynamic of "DYN" powering actually refers to no power being supplied. It is used with all dynamic microphones such as those from Electro-Voice, Sennheiser, Shure, and others. -
Page 7: Preamp Gain
Page 3 2.05 PREAMP GAIN: The preamplifier circuits of the M8 are split in two distinct gain stages separated by a "gain" control. The heart of both gain stages is an Analog Devices Corp. OP-275tm dual operational amplifier. This amplifier was chosen for its "good sound" characteristics. -
Page 8: Channel Assignments
frequency of 10Khz and allows a cut or boost of 10dB. The mid frequencies center frequency is adjustable from 2Khz to 5Khz. It offers a cut and boost of 10dB. The low frequency equalization has a center frequency of 100Hz and offers a cut and boost of 10dB. -
Page 9: Output Section
audio from that individual input channel is routed directly to the "mixer" headphones. The normal headphone source is momentarily interrupted while the PFL audio is sent to the mixer phones. PFL is used to isolate the audio from one individual channel. This is helpful when checking setups, verifying proper wireless operation, etc. -
Page 10: Boom Headphone Outputs
HOWEVER, the operator has final control over listening levels relevant to ambient sound levels, headphone brands, types and efficiencies, and must decide what is appropriate. Professional Sound Corporation makes no guarantees as to the effectiveness of the power limiting devices within the M8 Mixer being fit for any particular application, circumstance or listening level. -
Page 11: Director Headphone Output
Page 7 3.05 HEADPHONE OUTPUTS-DIRECTOR The M8 Mixer is also equipped with an additional headphone feed labeled as "Director". This headphone feed is also monoral and has a six way source selection switch. The director headphone feed can be selected as follows: MAIN OUTPUT ONE MAIN OUTPUT TWO MAIN OUTPUT THREE... -
Page 12: Private Line
audible tone used to easily identify slates during editing. This feature can be turned off internally if desired. Page 8 3.08 PRIVATE LINE: The private line provides a discreet one way (simplex) communication from sound mixer to both boom operators. It can be used during recording without audio being sent to the recorder. -
Page 13: Remote Rolls
jack is used when the boom operator wishes to use an external talk back microphone. This jack provides positive bias to external electret microphones. You can use any of the various positive bias lavilier microphones on the market such as the PSC Millimic. Also, dynamic microphones can be used if a DC blocking capacitor is installed. -
Page 14: Powering
bulbs. (A high intensity LITTLITEtm is included with the M8 Mixer) please note that the high intensity LITTLITEtm draws approximately 5 watts, nearly the same as the entire M8 Mixer. Use of this light will dramatically shorten battery life! Page 10 POWERING: 4.01 INTERNAL BATTERIES: The M8 Mixer was designed from the ground up as a portable and thus battery... -
Page 15: Grounding
recharged from an appropriate external charger connected to the external power input XLR connector. Pin outs are as follows: Pin 1 ground (-), Pin 3 charge current input (+). NiCad batteries should be charged at a 400 mA/Hr rate for 12-16 hours. Page 11 4.04 GROUNDING: The M8 Mixer offers an excellent signal to noise ratio. -
Page 16: Lcd Meters
still popular in the USA. The V.U. (volume unit) meter is average reading and was designed to approximate the equivalent loudness as perceived by the human ear. Since the V.U. meter is average reading, it is well suited for most types of analog recording. -
Page 17: External Speakers
The M8's internal speakers are very small 40 mm (1.57") and offer limited bandwidth. This is a trade-off between performance and size and weight. The speakers performance is limited, and is not representative of the speaker amplifiers performance. Page 13 6.03 EXTERNAL SPEAKERS: As mentioned in paragraph 6.01 the M8 Mixers speaker amplifiers will drive any speaker from 4 to 8 Ohms. -
Page 18: Circuitry
The side panels of the M8 Mixer are decorative in nature. They are screwed onto the actual, welded structural sides of the housing. These side panels also feature three stainless steel threaded inserts (6-32 thread) that can be used for various purposes such as mounting recorder shelves or securing your M8 Mixer to a sound cart. -
Page 19: Connector Pin Outs
Page 15 9.01 CONNECTOR PIN OUTS: The following information is provided for use of technicians and other qualified individuals desiring to build various cables for use with the M8 Mixer: Preamp Input XLR's Pin 1 = Ground Pin 2 = Audio HI (12T Pwr +) Pin 3 = Audio Low (12T Pwr -) -
Page 20: Specifications
TT-2: Same As Above Speaker Tip = Speaker (+) Ring = Speaker(-) Sleeve = No Connection Page 16 SPECIFICATIONS: Chassis Size: 14.75"W x 18.00"D x 3.00"H (37.4cm x 45.7cm x 7.6cm) Chassis Material: 0.125" 5052-H32 Aircraft Aluminum (3.2mm) Fully T.I.G. Welded Bottom Cover: 0.062"... - Page 21 Mic Power: 12T, 48PH, Dyn to DIN Specs Meters: LCD Bargraph, Peak Reading, 40dB range Page 17 Monitor Speakers: Stereo, 40mm, 1 watt per channel Faders: Penny and Giles tm 83mm Conductive Plastic Rotary Pots: Clarostat tm Conductive Plastic, Environmentally Sealed Switches: NKK, Environmentally Sealed Signal to Noise:...
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