Setting the Correct Gain Structure

You’re now ready to establish the correct gain structure—the key to getting the best performance from the PL 2404, or from any mixer, for that matter. This is a simple procedure that ensures optimum input and output levels so that no unnecessary noise (caused by too low a signal) or overload distortion (caused by too high a signal) is created. Here’s a step-by-step description of how to do so:

a.With all connections made (as described above) but with the power amplifier

and PL 2404 off, start by setting the power amplifier volume to minimum. On the PL 2404, turn all channel Level controls fully counterclockwise (to their “∞” position) and set all four bus faders to their “∞” position. If the Main output jacks are connected to a power amplifer and loudspeakers (as described in #2 on page 12), set the Main Level knob to its 2 o’clock “0” position. If the Control Room output jacks are connected to a power amplifer and loudspeakers (as described in #2 on page 12), set the Control Room Level knob to its 2 o’clock “0” position.

b.If you have a microphone connected to channel 1 and/or channel 3, set the rear panel Trim knobs to their fully counterclockwise (+4) position.

c.Set all channel EQ and Balance knobs to their center detent “0” positions.

d.Set all channel Aux send knobs and all Aux return Level knobs to their fully counterclockwise (“∞”) position.

e.Turn on all devices connected to channel line inputs and Aux returns and set their output level controls to unity gain or, if there is no unity gain indicated on their output control, to maximum. If you’ve got outboard effects processors con- nected to Aux returns, make sure they are sending completely “wet” (processed) signal, with no “dry” (unprocessed) signal mixed in.

f.Turn on the PL 2404’s rear-panel Power switch—the Power LED in the main section will light up. Finally, turn on your power amplifier.

g.Play an instrument connected to one of the PL 2404’s line inputs* and, while doing so, slowly raise the corresponding channel Level control to the 2 o’clock “0” position. Then slowly raise the power amplifier volume until you reach the level you want to hear. If the incoming signal sounds distorted, you may need to lower the output level of the instrument, though this will rarely occur. Conversely, if the signal is too low even with the output level of the instrument all the way up, something’s definitely wrong: in all likelihood, the connecting audio cable is faulty and should be replaced.

h.Repeat step (g) above for each instrument connected to the PL 2404 channel line inputs.

**If you’re using an instrument such as electric guitar or bass, we recommend that you connect it to the PL 2404 with a direct injection box to ensure correct impedance.

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Samson PL2404 manual Setting the Correct Gain Structure
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PL2404 specifications

The Samson PL2404 is a sophisticated audio mixer that stands out in the realm of live sound and studio applications. It is designed for professionals seeking versatility, quality, and robust performance in a compact package.

One of the main features of the PL2404 is its 24-channel configuration, which allows users to handle a variety of audio sources simultaneously. Each channel is equipped with a 3-band EQ, providing precise control over high, mid, and low frequencies. This EQ section helps audio engineers shape the sound of individual channels to achieve optimal mix clarity.

The mixer also includes 4 subgroups, which enable the grouping of channels for simplified control over multiple inputs. This is particularly useful for live performances or large events, as it streamlines the mixing process and allows for quick adjustments. Each subgroup can be routed to the main mix or through auxiliary outputs, offering greater flexibility.

In terms of connectivity, the PL2404 features a range of options, including XLR inputs for microphones, 1/4" TRS inputs for line-level devices, and various send/return options for external effects processors. This diverse range of inputs and outputs makes it easy to integrate the mixer into a variety of audio setups.

The PL2404 also incorporates advanced technologies designed to enhance audio quality. Its low-noise preamps ensure that every sound source is captured with clarity, while the mixer’s overall design minimizes signal interference and crosstalk. This ensures that whether you’re recording in a studio or mixing live, the integrity of the sound is maintained.

Additional characteristics of the PL2404 include a built-in talkback function, which allows the engineer to communicate with performers or other crew members without disrupting the mix. The intuitive layout of controls ensures quick access to essential functions for both novice and experienced users.

The PL2404’s rugged construction makes it suitable for touring, as it can withstand the rigors of constant transportation. Its lightweight yet durable chassis is designed to endure the wear and tear of frequent use, ensuring reliability in demanding environments.

In summary, the Samson PL2404 is a versatile audio mixer that combines professional features and advanced technology, making it an excellent choice for both live and studio applications. Its quality, flexibility, and durability make it a trusted tool for audio professionals.
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