PreSonus EQ3B Manual
From WikiRecording
Contents |
Citation
This article is based on a PreSonus manual and are used with the kind permission from the people at PreSonus.
WikiRecording thanks PreSonus for their support of our community.
The original manuals can be found at PreSonus's Technical Support Website.
PreSonus Audio Electronics, Inc is not responsible for the content of this article.
EQ3B FRONT PANEL BASIC LAYOUT
The front panel on the EQ3B is divided into three sections. These are the three bands of equalization:
There is a frequency selection knob (Hz), gain/gain reduction(dB) (amplitude) knob and a Q control.
The frequency selection knob (Hz) allows the user to choose the center frequency of that band of the EQ.
The Q knob allows the user to alter the width of the frequency being adjusted. Q is defined as the ratio of the center frequency divided by bandwidth. An example of how the width looks can be seen below in Figure 1.
An example of use of high Q would be a Notch Filter. A Notch Filter is used to remove a small frequency range that may be annoying or unwanted. An example of wide width or low Q would be a bell. An example of using a bell would be a low end roll off. Lets say that a person is performing live and the low end is too overpowering.
The engineer or sound person could set the Q at 0.1, frequency at 80Hz and the gain reduction to -12. This would enable that person to lower a wide frequency range fairly quickly. The Gain/Gain Reduction knob (dB) allows the user to raise or lower the amplitude (peak) of the chosen frequency.
Bypass
If the BYPASS button is not pushed in, the EQ3B is processing the signal (equalizing). Pushed in, the EQ3B is no longer equalizing the signal.
80Hz
The 80Hz button is a low end roll off filter. When pushed in, the 80Hz button causes all frequencies below 80Hz to be attenuated (dropped) by 12dB. This filter can be handy in several live and studio applications. One instance would be for use on a vocal. The 80Hz filter would help reduce the boominess of a deep vocal.
BACK PANEL BASIC LAYOUT
Input
The input jack accepts balanced/unbalanced tip-sleeve or tip-ring-sleeve connectors or XLR connectors. The input can handle up to +24dBu unbalanced levels.
Output
The output jack accepts (balanced/unbalanced) tip-sleeve, tip-ring-sleeve or XLR connectors. The output will deliver up to +24dBu in signal level unbalanced.
APPLICATION GUIDE
The EQ3B can be hooked to another processor, such as the COMP16 or TubePre in a live or studio environment. We do recommend that whenever possible, balanced cables be used. Examples of balanced cables would be XLR or TRS (Tip Ring Sleeve). A balanced cable is preferred because it generally has a greater level of noise rejection. In other words it is less susceptible to outside interference.
Use with a Console/Mixer Insert
The EQ3B can be connected to an insert point on a console (mixer) by using a TRS Y-cable. This cable is Y-shaped, has a single TRS jack on one end and two TS (Tips-Sleeve) jacks on the other end. The single end will look like a stereo connector jack. This end of the cable plugs into the insert jack on the mixer channel. The other ends of the cable plug into the input and output of the EQ3B. If the EQ3B does not work immediately, you may want to try changing the jacks that are plugged into the input and output of the unit.
EQ3B SPECIFICATIONS
Number of Channels: 1
Dynamic Range: >115dB
Signal to Noise Ratio: >95dB
Headroom:+22dBu
Frequency Response: 10Hz to 50kHz
XLR Input Impedance: 10kOhms
TRS Input Impedance: 10kOhms
XLR Output Impedance: 51 Ohms
TRS Output Impedance: 51 Ohms
THD + Noise: <0.002%
Internal Operating Level:+0dBu = 0dB
Input Connectors: 1/4”, Tip Ring Sleeve, XLR
Output Connectors: 1/4”, Tip Ring Sleeve, XLR
Power Supply: External, Linear Supply
Power Requirements: 16VAC, 1000mA, 20 Watts
Weight: 4 lbs.
Size:..5.5”X5.5”X1.75”
