AudioQuest M-27 specifications Events, Effects of Operators Presence, Use with Windscreen

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6.Move to the next area and repeat steps 4 and 5.

7.When finished with survey or when 16 events are accumulated, press ON/OFF to exit

EVENTS.

At any time, even when accumulating data, the current or any previous event data may be displayed. Press EVENT key until the desired event is displayed. Press any other key to display data for that event.

If the CODE/HL3 key is pressed it will display the current time for the current event and the start time of previous events. It will also cycle through HTL, LTL, and 3 dB.

To determine when a representative sample has been taken, press Lavg/Leq for the current event. If the value does not change by more than a few tenths of a decibel over a few minutes, the data should be valid for that area.

Effects of Operator's Presence

Any object or surface can act as a reflector or absorber of sound. An operator or person wearing the dosimeter is also a reflector of sound and affects the microphone performance. The M-27 is designed to read correctly with the microphone in a random incidence sound field without the presence of reflecting objects.

The recommended placement of the microphone for personal noise monitoring is on the shirt collar, high on the shoulder, and away from the neck as far as practical (see Figure 6). If the noise is directional, it is generally the best practice to place the microphone near the ear which receives the most noise exposure.

If the M-27 is to be used as a hand-held instrument the microphone should be mounted on the MB-1 microphone bracket (see Figure 7). It may either be clipped to the bracket or the clip removed and the microphone screwed to the bracket. The bracket is then attached to the belt clip on the back of the instrument. If desired the complete unit can be mounted on a tripod (see Figure 8). The microphone should be pointed upward forming approximately a 70 degree angle with the noise source. It should not be pointed at the noise source.

Use with Windscreen

To prevent wind from blowing across the microphone and causing erroneous measurement of sound level, the model WS-5 Windscreen should be used. It is recommended that the windscreen be used at all

times. Insert the microphone in the windscreen and gently pull it over the Velcro strip.

Using a Printer

The M-27 can print out to Centronics compatible parallel or serial printers at 300, 600, 1200, or 2400 baud (see Figure 9). It can also send various line feed and carriage return combinations to accommodate different printers. It is necessary that the printer and M-27 agree on protocol and that the proper cable be selected for a printout.

Serial Printers

Check the printer manual to set printer to serial and desired baud rate. If switches in the printer are changed, make sure the printer has accepted these changes. This may require turning the printer off for a few seconds and turning back on.

Check printer interconnections to determine proper cable including male and female pins on the connector.

Set the internal switches in the M-27 to agree with the printer. It is not necessary to reset the M-27 when printer switches are changed.

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Contents Table of Contents FCC Compliance and Cautionary Note IntroductionRUN Pause Reset OFF Simplified Operating InstructionsControl Keys CodeProcedure to Accumulate Event Data Sound Level Meter KeysDosimeter Keys Time KeysSetting the Clock Using a PrinterRecording the Calibration Level Specifications Dumping Raw DataHL3 Print Changing Printer ParametersWeighting Characteristics General DescriptionPrinciples of Operation GeneralMicrocomputer Modes Testing and Calibration Battery TestBattery Replacement WhereOperating Procedure As an Area Monitor As a Survey or Event MonitorEvents Effects of Operators PresenceUse with Windscreen Connections to Printer Sample PrintoutsPage Page Memory Map Memory Location Data03CO-1FFF Editing PrintoutPrinter Setup Extending Battery LifeDSR Internal Switches Switch Positions SwitchSetting Internal Switches Code Decoding Troubleshooting Interpreting ResultsUse of Lavg and TWA Estimating TWA from Lavg Accuracy of ReadingsHints and Good Practices Accessories Service Policy

M-27 specifications

AudioQuest M-27 is a standout speaker designed for audiophiles who demand high performance and exquisite sound quality. As part of AudioQuest's commitment to providing unparalleled audio experiences, the M-27 blends advanced technologies with premium materials to deliver exceptional musical clarity and accuracy.

One of the key features of the M-27 is its innovative driver design, which utilizes a new-generation ceramic cone. This cone is engineered to minimize distortion while enhancing transient response. The result is a speaker that offers a clear, detailed sound across a wide frequency range. The drivers are also matched with an advanced neodymium magnet system, ensuring efficient energy transfer and improved bass response.

The M-27 is equipped with a sophisticated crossover network that has been meticulously designed to maintain the integrity of the audio signal. By employing high-quality components, including precision resistors and capacitors, the crossover effectively divides the audio signal into specific frequency bands, allowing each driver to perform at its best. This attention to detail not only enhances sound quality but also helps to create a more cohesive listening experience.

Another notable characteristic of the M-27 is its sturdy and well-constructed cabinet. Built from high-density MDF, the cabinet is engineered to minimize resonance and vibration, which can color sound. Moreover, AudioQuest has incorporated internal bracing to further enhance structural integrity. The elegantly finished exterior not only adds to the speaker's aesthetic appeal but also serves to complement various home decors.

Connectivity is made simple with the M-27, thanks to its standard speaker terminals that accommodate a wide range of wire gauges. This flexibility allows audiophiles to use their preferred cables for optimal performance. Additionally, the speaker is designed to work seamlessly with a variety of amplifier configurations, making it an adaptable choice for different audio setups.

Incorporating these advanced technologies and design principles, the AudioQuest M-27 is not just a speaker; it's a gateway to an immersive listening experience. With its ability to reproduce sound with remarkable accuracy, it will appeal to discerning listeners looking to elevate their audio playback and enjoy their favorite music in a whole new light. Overall, the M-27 stands as a testament to AudioQuest's dedication to crafting high-quality audio products that meet the needs of serious music enthusiasts.
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