For the 3-digit code:

1.Press CODE/HL3 until 3 or less digits code are displayed. (Leading zeros are not displayed.)

2.Enter code in table.

3.Convert Hex to binary (see Table 1).

4.Look up each position in internal switch section.

3 decodes to unit 3.

F decodes to parallel printer with graph and text.

C decodes to 0A and 00 print ending and 2400 baud. (The baud rate is not used in parallel.)

TROUBLESHOOTING

Blank display.

Press ON/OFF key.

If still blank, change battery.

Unit will not start when battery changed. Try again.

Disconnect printer from unit and reconnect battery. Return for service.

Unit reads low.

Check that internal switches are in proper position.

Reset unit.

Change microphone and recalibrate unit.

Unit reads high.

Check position of internal switches.

Reset unit.

Unit is erratic.

Change microphone.

INTERPRETING RESULTS

When the M-27 is set up for OSHA compliance and for most other settings, the following are, in general, true.

The HTL Lavg is less than the LTL and Lavg is less than Leq. The HTL Dose and TWA are less than the LTL Dose and TWA.

If Run Time is less than eight hours, TWA is less than Lavg; if Run Time is more than eight hours, TWA is greater than Lavg.

The SEL is greater than Leq.

The 3 dB Dose is greater than the LTL Dose if Leq is greater than the Criterion Level; it is less than the LTL Dose if the Leq is less than the Criterion Level.

The above may not be true if the noise is below the threshold level.

If the noise is continuous or impulsive, then Lavg will be nearly equal to Leq. If the noise is intermittent then Lavg will be several decibels less than Leq.

The time constant will cause the readings not taken with a 3 dB exchange rate to be greater than if there were no time constant. For 3 dB it makes little difference.

The Peak Level will be greater than Slow Max unless the peak occurred while the instrument was in PAUSE and was changed to RUN a few seconds later. Then Max Level might be greater than Peak Level.

second. U.L. Time will not count unless the level has exceeded the upper limit level for a total of one In all of the above, "greater" and "less" include "almost equal."

Use of Lavg and TWA

Time Weighted Average (TWA) is measured in decibels. It is the accumulated noise dose integrated over eight hours. The only difference

Page 21 Page 23
Page 22
Image 22
AudioQuest M-27 specifications Troubleshooting, Interpreting Results, Use of Lavg and TWA
Page 21 Page 23

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.
Top Page Image Contents