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Related Manuals for Samson PL2404
Summary of Contents for Samson PL2404
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Page 2: Table Of Contents
Introduction 1 PL 2404 Features 1 Guided Tour 3 Overview 3 Channels 4 Main Section 6 Rear Panel 8 Connecting The PL 2404 - General Suggestions 10 Setting Up and Using the PL 2404 12 Setting the Correct Gain Structure 13 Grounding Techniques 15 Busing, Submixing, and Channel Muting 17 Using the Balance Control 18... -
Page 3: Introduction
Appendices and full specifications. You’ll also find a warranty card enclosed— please don’t forget to fill it out and mail it so that you can receive online technical support and so we can send you updated information about other Samson products in the future. - Page 4 PL 2404 Features • An independent electronically balanced Control Room output (with dedicated level control) for connection to a power amplifier and studio monitors. • Four Bus faders enable easy control of bus output levels. • Input trims for the mic inputs of channels 1 and 3 are continuously adjustable from +4 to -50 dB, making it possible to use the PL 2404 with a wide variety of microphone types.
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Page 5: Guided Tour - Overview
BALANCE ∞ ∞ ∞ ∞ ∞ LEVEL LEVEL LEVEL LEVEL LEVEL CHANNELS Guided Tour - Overview SAMSON CH 19/20 CH 21/22 CH 23/24 AUX RETURNS PL 2404 STEREO MIXER HIGH HIGH ∞ AUX RET.1 -18 -12 -9 -6 LEFT RIGHT -18 -12 -9 -6 ∞... - Page 6 Guided Tour - Channels 1: Equalizer (violet) - These knobs determine the amount of boost or attenuation in each of three frequency areas (up to 15 dB for each area). The mid frequency control (centered CH 1/2 at 1 kHz) utilizes a resonant (“bell”) peaking curve, while the high and low frequency controls (centered at 10 kHz and 80 Hz, respectively) utilize shelving curves.
- Page 7 Guided Tour - Channels fully clockwise, only the even-numbered (right) input signal is heard (panned hard right). When only the odd-numbered (left) input is connected, the Balance knob functions as a constant level Pan control, allowing you to continuously place the incoming signal anywhere in the left-right stereo field. For more information, see the “Using the Balance Control”...
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Page 8: Main Section
Guided Tour - Main Section SAMSON AUX RETURNS PL 2404 STEREO MIXER ∞ AUX RET.1 -18 -12 -9 -6 +3 +6 +9 +12 LEFT RIGHT -18 -12 -9 -6 +3 +6 +9 +12 POWER ∞ AUX RET.2 SOLO MAIN ∞... - Page 9 Guided Tour - Main Section 5: Meter - This ten-segment bar meter shows the continuous output level of the Main left/right output. For optimum signal-to-noise ratio, try to adjust all levels so that program material is usually at or around 0 VU, with occasional but not steady excursions to the red “+”...
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Page 10: Rear Panel
UNBALANCED <75Ω+4dBu LINE INPUTS - BALANCED 10KΩ+4dBu MAIN BALANCED <75Ω+4dBu BUS INSERTS CONTROL ROOM UNBALANCED <75Ω +4dBu BALANCED <75Ω+4dBu MIXER LINKING SAMSON BALANCED −50 −50 3 = LO 2 = HI 1 = COM MIC 3 MIC 1 AUX SENDS AUX RETURNS UNBALANCED <75Ω... - Page 11 Guided Tour - Rear Panel 7: Mic inputs (channels 1 and 3) - Use these electronically balanced XLR jacks to connect a microphone to channel 1 and/or channel 3. These are intended to accept signal from low-level, low-impedance mics but can also be used for signal from other sources (such as direct injection boxes) if the channel’s Trim control (see #8 below) is turned down.
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Page 12: Connecting The Pl 2404 - General Suggestions
Connecting The PL 2404 - General Suggestions The actual connections you’ll make to and from the PL 2404 will vary according to the environment you use it in and the particular equipment you have. In the “PL 2404 Applications” sections at the rear of this manual, you’ll find some suggested setups. - Page 13 Connecting The PL 2404 - General Suggestions • Matched signals (i.e. the stereo left-right outputs of a keyboard, drum machine, tone generator, effects processor, CD player, or tape recorder), should always be connected to the PL 2404’s paired odd/even channels (i.e. 1L/2R, 3L/4R, etc.).
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Page 14: Setting Up And Using The Pl 2404
PL 2404 for recording). It is never a good idea to power up any amplifier that is not connected to loudspeakers. SAMSON 3. Next, make the signal input connections to the mic or line inputs of the various channels. WARNING: When using channel 1 or 3, do not connect its microphone input and line input simultaneously;... -
Page 15: Setting The Correct Gain Structure
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. - Page 16 If you need to make adjustments to the overall level, use the level control of your power amplifier. If you encounter difficulty with any aspect of setting up or using your PL 2404, you can call Samson Technical Support (1-800-372-6766) between 9 AM and 5 PM EST.
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Page 17: Grounding Techniques
Grounding Techniques Hum and buzz are the biggest enemies you face when interconnecting a large number of different pieces of equipment to a central audio mixer. This is because each piece of equipment may operate at a marginally different voltage (this difference is called potential) and, when two devices at slightly different potential are physically connected with audio cabling, the end result can be nasty, extraneous noise (mind you, connecting two devices at very different... - Page 18 Grounding Techniques If you’re using the PL 2404 in a fixed location such as a recording studio, you may want to invest the time and money into creating a star ground network. This is by far the best technique for avoiding grounding problems. It involves using a formidable ground source such as a cold water pipe or a copper spike driven into the earth.
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Page 19: Busing, Submixing And Channel Muting
As we’ve seen, the PL 2404 uses a system of four buses—pathways through which signal can be routed. The four PL 2404 bus faders control the overall level of the signal being output through the four buses. When the “L/R” switches above each bus fader are pressed in, the signal from that bus is also routed to the Main and Control Room outputs. -
Page 20: Using The Balance Control
Using the Balance Control The final Main output of the PL 2404 is stereo—that is, there are two discrete Main output jacks (and two discrete Control Room output jacks), labeled “left” and “right,” which will normally be routed to two discrete speakers.* Because of this, you will usually be working with a stereo field that ranges from hard left to hard right. -
Page 21: Using Equalization
One of the most exciting aspects of using a mixer such as the PL 2404 is the ability to shape a sound, using a process called equalization. But there are few areas of sound engineering more misunderstood than equalization, and, just as good EQ can really help a sound, bad EQ can really hurt it, so read on... -
Page 22: Using Aux Sends And Returns
Master and Control Room outputs by pressing in the associated bus L/R switch (as described in #10 on page 7). Note that signal arriving via the PL2404 Aux returns can be monitored over headphones only when the Solo/Main switch is set to “Main”... -
Page 23: Using Channel Inserts
Using Channel Inserts In addition to using Auxiliary sends and returns to access outboard devices, the PL 2404 also provides channel inserts for the first four input channels. These should be used when you want to affect just one input signal, as opposed to signal from several inputs—most often, this will be for dynamic processing purposes (such as outboard equalization, compression/limiting, or noise gating). -
Page 24: Using Pfl/Afl
(if the soloed channel is one of channels 1 - 4) all effects being applied and returned via the channel insert. Note that there is no provision for soloing signal arriving via the PL2404 Aux returns. LEDs in the meter section allow you to see at a glance which mode the PL 2404 is in. -
Page 25: Applications Notes
115V - 60 Hz 25W RATING CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN BALANCED <75Ω+4dBu ~AC INPUT 115V, 60Hz CONTROL ROOM BALANCED <75Ω+4dBu SAMSON TRS INSERT STEREO INPUT BALANCED UNBALANCED BALANCED −50 TIP = LEFT TIP = HI TIP = RETURN... -
Page 26: Using The Pl 2404 As A Main Live Mixer
RATING CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN MAIN BALANCED <75Ω+4dBu ~AC INPUT 115V, 60Hz CONTROL ROOM BALANCED <75Ω+4dBu SAMSON TRS INSERT BALANCED UNBALANCED BALANCED −50 −50 TIP = HI TIP = RETURN 3 = LO RING = SEND... -
Page 27: Using The Pl 2404 As A Keyboard Submixer
115V - 60 Hz 25W RATING CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN MAIN BALANCED <75Ω+4dBu ~AC INPUT 115V, 60Hz CONTROL ROOM BALANCED <75Ω+4dBu SAMSON SAMSON TRS INSERT STEREO INPUT BALANCED UNBALANCED BALANCED −50 TIP = LEFT TIP = HI TIP = RETURN... -
Page 28: Linking The Pl 2404 With Other Mixers
MAIN BALANCED <75Ω+4dBu ~AC INPUT 115V, 60Hz BUS INSERTS CONTROL ROOM UNBALANCED <75Ω +4dBu BALANCED <75Ω+4dBu MIXER LINKING MASTER MIXER SAMSON TRS INSERT UNBALANCED BALANCED −50 −50 TIP = RETURN 3 = LO RING = SEND 2 = HI SLEEVE = COM... -
Page 29: Appendix A: Block Diagram
Appendix A: Block Diagram... -
Page 30: Specifications
Specifications 1. Frequency Response (unity gain, line input 0 dB) 2. THD+N (unity gain, line input 0 dB, with 30 kHz LPF) 3. Maximum Gain 4. Crosstalk (Ch - to - Ch, 1 kHz, with 30 kHz LPF) 5. Residual Noise (with 30 kHz LPF, all faders down) 6. - Page 31 Produced by On The Right Wavelength for Samson Technologies Corp. Copyright 1996, Samson Technologies Corp. Printed March 1996 Samson Technologies Corp. 575 Underhill Blvd. P.O. Box 9031 Syosset, NY 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 516-364-3888...
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