For a large number of applications, e. Maximum front-to-back ratio Exceptionally low inherent self-noise Symmetrical transducer technology ensures extremely low distortion Transformerless and fully floating balanced output Switchable roll-off filter to compensate for proximity effects at a distance of approx. Beyer Dynamic M58 The M58 has been specifically designed for the needs of television reporting and outside reports.
Its elastic suspension reduces unwanted handling and structure borne noise as far as possible. In addition, the frequency response is optimized to a maximum of speech intelligibility. This setting should be used when the mixer output is stereo, of either type AB or MS. Headphones of any impedance may be employed although impedances of around Ohms will make best use of battery power. For location work, it is advisable to employ headphones with good ear sealing even though they can be uncomfortable when worn for long periods of time.
Increasing the headphone level to drown the directly audible sound in noisy situations could prove fatiguing or even damaging to the hearing in the long term, particularly if the limiters are not used. The control knob next to the jack on the left hand side panel allows the headphone output level to be adjusted. A rotary [PHONES] switch on the front panel allows the operator to select various sources for the monitored signals, including the output of an MS matrix which will allow an MS signal being output from the mixer to be monitored as the equivalent AB signal.
This switch has the following functions. The output of the microphone is levelled by a compressor and overrides the main audio, appearing on the mixer outputs and in the monitoring system. If the monitoring mode is set to [RET] at the time the button is pressed, it automatically reverts to the internal or [MXR] setting. This is so that the recordist, if working with a recorder equipped with off-tape monitoring will not have to talk over a delayed version of the announcement. The inclusion of the compressor means that a usable recording can be made by speaking in a normal voice over a range of 1.
The routing switches on the right hand side routing panel of the mixer can direct the signals to either or both of the two mixing busses. The input and output from the pair are treated as an AB stereo signal. The gains of both channels are controlled by the CH1 fader. In this mode the CH2 fader must be set to maximum [0] or the CH2 signal will be attenuated. The input to the pair is treated as an MS stereo signal which may be matrixed into AB stereo.
Both input channels should be routed to both output channels routing switches centred. When it is moved downwards, it inverts the phase of the signal. This has the incidental effect of interchanging left and right in an MS encoded input. This can be useful when the MS mic is rigidly fixed to a boom and rotated from being above the subject to below, when left and right will become interchanged.
These allow either of the channels to be routed directly to either or both output channels. This guarantee covers defects in manufacture, workmanship and materials and includes the cost of parts, labour and return carriage.
In order to make a claim under this guarantee, the equipment should be returned to SQN Electronics Ltd either directly or through the retailer from whom it was purchased, accompanied by both the original invoice or a copy showing the date of purchase and a statement giving a clear description of the fault. SQN Electronics Ltd regrets that it cannot be held responsible for any loss or damage to the equipment while it is in transit from the customer and it will be the responsibility of the customer to ensure that it is properly packed and insured.
Nor can SQN Electronics Ltd be responsible for any costs incurred by the customer in sending the equipment, unless by prior agreement. SQN Electronics will examine the equipment and if a fault is found which is caused by a defect in manufacture, workmanship or materials, SQN Electronics Ltd will repair the fault free of charge.
SQN Electronics Ltd gives no other warranty than that contained in this guarantee. SQN Electronics Ltd shall not be held responsible for any losses or damage of any kind, whether direct or consequential, arising from the use or misuse of the equipment or by reason of its being out of service through a claim being made under this guarantee or otherwise.
Download This Document in Adobe Acrobat format. Contents Alkaline cells are also suitable but will have a shorter operating life. The use of carbon zinc batteries, which may leak and cause extensive damage, is definitely not recommended.
Noise Figure dBu A weighted from a Ohm source. Each input can be routed to either or both of the output channels. Stereo [S] Channels ganged. The CH2 fader acts as an attenuator and its maximum clockwise rotation yields a relationship with CH1. Mid-Side [MS] Channels ganged. The CH2 fader acts as an attenuator or 'image width control' and its maximum clockwise rotation yields a mid to side relationship. Note: the CH2 right output feed is phase inverted relative to the left output feed. Phase Switch Channel 2 can have its phase inverted by means of a switch [INV2] on the right hand side panel.
Note: this has the incidental effect of interchanging left and right in an MS encoded signal. Master Gain The master gain control is located on the left hand side panel. It controls the level of all four channels. It is normally placed in its detented calibrated position and provides a reserve of 3dB extra gain above this setting. The sensitivity is adjusted by a screwdriver preset on the left hand side panel. Output Attenuators The level at the Multi-way connector may be attenuated by 50dB to provide a nominally microphone level feed.
The output resistance is 75 Ohms. The outputs may be connected to unbalanced loads if required. Unbalanced Outputs the 3. VU meters can also be provided. The meters are normally calibrated with the mixer driving a bridging load of 10k Ohms.
While the mixer is operating, the meters are illuminated by low power light emitting diodes. Peak level, which is used as a reference for the limiters, is considered to be 8dB above this setting.
Other calibration levels are readily available to order. The limiter range is 20dB. An LED for each output channel indicates limiter action. This Graph shows the entry into limiting on a steady signal for a nominal peak level of 8dBu Line-up Tone The Line-up tone is a sine wave at 1kHz with distortion below 0.
When the [GANG ] switch is in either of the ganged positions, the left hand channel tone is interrupted for ms every 3s. The tone switch on the front panel is a three position toggle, shared with the Slating Microphone. Monitoring Amplifiers with adjustable gain capable of driving most types of headphone to a suitable level. Headphones with a resistance of around 25 to Ohms per side will make best use of battery power.
Pre-Fade listening to input Channel 4 is possible. As MS matrixing of the two output channels is also possible, an MS recording may be monitored as the equivalent AB stereo. The headphone gain control is on the left hand side panel. Please note that with some headphones damage to the hearing may be possible if the phones gain is habitually set too high. Slating Microphone A microphone is mounted behind the front panel near the centre of the mixer. When in use, the output of the microphone is levelled by a compressor and displaces the normal audio, appearing on the mixer outputs and in the monitoring system.
While the microphone is active, the monitoring mode automatically reverts to the internal or [MXR] setting. The Slating Microphone switch on the front panel is a three position toggle, shared with the Line-up tone. Batteries Six AA size cells in a quick change compartment.
The acceptable range of voltages is 5 to 18 Vdc allowing the use of most cell technologies. Battery Test The right channel meter is fitted with a suppressed-zero battery voltage scale, selected by a front panel push button. External Power A supply in the range 5 to 18 Vdc may be used. The maximum consumption will be 2.
The power input terminals float with respect to ground. Either or neither side may be grounded at will, thereby allowing the use of floating supplies or grounded supplies of either polarity. There will be no possibility of hum-loops being formed. Dimensions The dimensions of the mixer case are: Height 44mm, Width mm, Depth mm Weight The weight of the mixer without batteries is 1.
Bass Cut: Flat or dB at 50Hz. Channel 2 can have its phase inverted by means of a switch [INV2] on the right hand side panel.
0コメント