HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ Current Version \ Winlogon
At right pane there is "Shell". The value of it must be "explorer.exe"
At right pane there is "Shell". The value of it must be "explorer.exe"
20120417
Box enclosure tunning at resonance frequency
The tools you need to tune your enclosure are a multimeter, a software-based frequency generator and a high-power (>5 watts) low impedance resistor, ideally between 4 to 8 ohms. Somthing like a 10W wirewound resistor would do just fine.
Tuning - checking the resonance frequency
At the resonance frequency, the impedance will either peak at its highest level (sealed enlosures), or dip to its lowest level (ported and bandpass enclosures). 6th order bandpass enclosures will have two resonance frequencies, one for each volume.
To determine the resonance frequency of the system, set the multimeter to current measurement, then hook it up in series with the subwoofer to your amplifier, then use the frequency generator to drive the subwoofer. At the resonance frequency, the meter will read the lowest result (sealed enclosure) or the highest result (ported and bandpass enclosures). In the case of the ported and bandpass enclosures, If the measured resonance frequency is not the same as the predicted resonance frequency, adjust the port lengths accordingly. In the case of the sealed enclosure, the resonance frequency can be adjusted by adding or removing stuffing material from the enclosure.
A more accurate version of the above method involves using a resistor in series with the subwoofer system, and connecting the multimeter (set to voltage mode) across the resistor. In this case, the meter will measure the lowest voltage at the resonance frequency of a sealed system, and the highest voltage at the resonance frequencies of the ported and bandpass systems.
Source: The Box-Building FAQ
Tuning - checking the resonance frequency
At the resonance frequency, the impedance will either peak at its highest level (sealed enlosures), or dip to its lowest level (ported and bandpass enclosures). 6th order bandpass enclosures will have two resonance frequencies, one for each volume.
To determine the resonance frequency of the system, set the multimeter to current measurement, then hook it up in series with the subwoofer to your amplifier, then use the frequency generator to drive the subwoofer. At the resonance frequency, the meter will read the lowest result (sealed enclosure) or the highest result (ported and bandpass enclosures). In the case of the ported and bandpass enclosures, If the measured resonance frequency is not the same as the predicted resonance frequency, adjust the port lengths accordingly. In the case of the sealed enclosure, the resonance frequency can be adjusted by adding or removing stuffing material from the enclosure.
A more accurate version of the above method involves using a resistor in series with the subwoofer system, and connecting the multimeter (set to voltage mode) across the resistor. In this case, the meter will measure the lowest voltage at the resonance frequency of a sealed system, and the highest voltage at the resonance frequencies of the ported and bandpass systems.
Source: The Box-Building FAQ
20120416
Telnet in Windows 7
Telnet Client is not installed by default on Windows 7, Windows Server 2008 R2, Windows Vista, or Windows Server 2008. So here is the error message you get: 'telnet' is not recognized as an internal or external command, operable program or batch file.
To install it go to Start > Control Panel > Programs.
In the Programs and Features section, click Turn Windows features on or off.
From the Windows Features list, select Telnet Client, and then click OK.
You can also check Install Telnet Client from technet.microsoft.com.
"Turn Windows features on or off" window is empty or blank
If you try to turn Windows features on or off, the dialog box comes out empty or blank. Or can see “please wait” initially as it tries to make up a list but then it blanks out. Microsoft created knowledge base 931712 to acknowledge the problem.
First of all make sure "Windows Modules Installer" service is enabled and running. That might be just all you need.
How to save and export msconfig.exe to a .txt file
Type "msinfo32.exe" in the "run" box of windows to open and view system information.
Double-click "Software Environment" to expand it.
Click "Services"
Click "File" and then "Export"
Click "Startup Programs"
Click "File" and then "Export"
Double-click "Software Environment" to expand it.
Click "Services"
Click "File" and then "Export"
Click "Startup Programs"
Click "File" and then "Export"
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