ブロック・ダイヤグラム MASTER SEND PEAK MIXER OUT L AMP IN L LIMITER (+4dBm) (+4dBm) (−60dBm〜+4dBm) MASTER FADER L CH 1 POWER MIXER OUT R AMP IN R (−60dBm〜+4dBm) (+4dBm) (+4dBm) FADER 150W/4Ω METER SENS HIGH LOW SEND POWER PEAK MASTER FADER R 150W/4Ω...
The handles make this piece of gear easy to carry, too. The CPM-300 is ideal as a simple PA for a variety of events, and since it is air-cooled, it stays quiet.
The lightning flash with arrowhead symbol, within an CAUTION equilateral triangle, is intended to alert the user to the RISK OF ELECTRIC SHOCK presence of uninsulated “dangerous voltage” within the DO NOT OPEN product’s enclosure that may be of sufficient magnitude to ATTENTION : RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR constitute a risk of electric shock to persons.
• Before using the unit in a foreign country, consult instructions below, and the Owner's Manual. with your retailer, the nearest Roland Service Center, ......................or an authorized Roland distributor, as listed on the "Information" page. • Do not open or perform any internal modifications on the unit.
Important Notes In addition to the items listed under “IMPORTANT SAFETY INSTRUCTIONS” and “USING THE UNIT SAFELY” on pages 2 and 3, please read and observe the following: Power Supply • Do not use this unit on the same power circuit with any device that will generate line noise (such as an electric motor or variable lighting system).
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Adding Reverberation to the Sound (Digital Reverb)..............13 Operating the Digital Reverb..........................13 Eliminating Feedback (Anti-Feedback Function)................14 How to Avoid Feedback ..............................14 Using the CPM-300's Anti-Feedback Function ......................14 Procedure for Operating the Auto Adjust Function..................14 Notes Regarding the Auto Adjust Function.....................15 Dynamic Adjust Function ...........................15 Common Notes about the Auto Adjust and Dynamic Adjust Functions ............15...
Names and Functions of Each Part Front Panel Channel Section Input Channels 1–6 (MONO) 7-8, 9-10 (STEREO) 1.SENS Knob This adjusts the sensitivity to ensure the proper input signal level. Adjust this knob so that the PEAK indicator (6) does not light too frequently. –...
* Output is normal when the fader is set to the 0 position. * The CPM-300's power amp features a built-in limiter circuit. This monitors the signal from the CPM-300's mixer to prevent clipping in the amp that can cause distorted sound and blown speakers.
16.SEND Jack (Standard Phone Type) ing other devices, confirm that the pin assignment matches that This is used for connecting external effects devices. The of the CPM-300's input. → signal sent to the effect device is output here ( p. 11).
MEMO The PC Limiter Circuit works to protect the CPM-300 if the + and - wires of the speaker cable are shorted or if speakers with impedance of less than 4 ohms are used; this may result in no sound from the speakers or distortion.
When you want to use the CPM-300's power amp only Connect to AMP IN Jack Just as with the CPM-300's mixer signal, the amplifier's built-in limiter circuit works to prevent the signal input from the AMP IN jacks from causing distortion and speaker damage.
* Using the improper sequence when turning the equipment on may result in malfunction or damage to speakers or other equipment. * After the CPM-300 is switched on, a protection circuit (the Muting Circuit) temporarily prevents the speakers from playing. →...
Adding Reverberation to the Sound (Digital Reverb) The CPM-300 offers four types of internal digital reverb. TIME Knob Reverb Mode Switches LEVEL Knob SEND Knob (Master Section) Reverb Mode (Reverb Types) ECHO :This is an echo effect perfect for karaoke.
In actuality, however, feedback may still occur even though you've observed the preventive measures listed above. Using the CPM-300's Anti-Feedback Function The CPM-300's built-in "Anti-Feedback Function" is a function that automatically detects feedback the instant it begins, after which the Anti-Feedback Filters then eliminate the feedback. The Anti-Feedback Function feature includes two functions.
Auto Adjust process. When the AUTO SET indicator goes out, and then feedback is no longer eliminated, after resetting each device (raising the CPM-300's faders, turning on mic switches, and so on), run the Auto Adjust function once more.
Further Details on the Anti-Feedback Function How the Removal of Feedback is Achieved The CPM-300's Anti-Feedback function works by applying narrow-band "filters," called "Anti-Feedback Filters," to the frequencies at which feedback is generated, thus eliminating the feedback by reducing the volume of those fre- quencies.
About the Protection Circuits The CPM-300 features special circuitry to protect the CPM-300 and any connected devices. Whenever this is activat- ed, the speakers are prevented from producing sound. Stop operation of the equipment, and immediately check to find the problem.
MIXER OUT and AMP IN is turned down. ( p. 11) Is a device with a HOT pin 3 connected to Channel 1? Pin 3 on the CPM-300's Channel 1 is wired to ground. No sound will be produced if pin 3 of the connected device is HOT.
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Auto Adjust process. When the AUTO SET indicator goes out, with feedback no longer being eliminated, then after resetting each device (raising the CPM-300's faders, turning on mic switches, and so on), run the Auto Adjust procedure once more.
Block Diagram MASTER SEND PEAK MIXER OUT L AMP IN L LIMITER (+4dBm) (+4dBm) (-60dBm – +4dBm) MASTER FADER L CH 1 POWER MIXER OUT R AMP IN R (-60dBm – +4dBm) (+4dBm) (+4dBm) FADER 150W/4 METER SENS HIGH LOW SEND PEAK POWER...
Index AMP IN ..............8,10,11 POWER Switch ..............9 ANTI FEEDBACK ..........7,14,15,16 Protection Circuits ............17 Anti-Feedback Function ........14,15,16 Rear Panel ................9 Anti-Feedback Filter..........14,15,16 Recommended Load Impedance........9 Auto Adjust Function ..........14,15,16 REC OUT Jack ..............8,10 AUTO SET Indicator (ANTI FEEDBACK)..14,15,16 RETURN Jack ............8,10,11 AUTO SET Switch (ANTI FEEDBACK)......14 Reverb Mode ..............13 BAL (Balance) Knob ............6,12...
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Information When you need repair service, call your nearest Roland Service Center or authorized Roland distributor in your country as shown below. POLAND LEBANON PANAMA SINGAPORE AFRICA AFRICA Productos Superiores, S.A. P. P. H. Brzostowicz A. Chahine & Fils Swee Lee Company Apartado 655 - Panama 1 UL.