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Related Manuals for Parasound JCM 250
Summary of Contents for Parasound JCM 250
- Page 1 JCM 250 Mono Power Amplifier OWNER’S GUIDE Read this manual and all warning labels on the product before using this product. Failure to follow these instructions and safety precautions can result in serious injury or death. Keep this manual nearby in a safe location for future reference.
- Page 2 Important Safety Instructions The lightning flash with the arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of “dangerous voltage” inside the product that may constitute a risk of electric shock. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions in the literature accompanying the product.
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Page 3: Table Of Contents
Table of Contents Page Topic Placement & Ventilation Guidelines AC Mains Voltage Front and Rear Panel Illustration Rack Mounting Bias Level Switch Gain Switch Audio Input & Output Connections Speaker Connections Turn On Options Front Panel Operation If You Require Assistance or Warranty Repair Chassis Illustration &... - Page 4 Parasound dealer’s name and telephone number. Your purchase receipt/bill of sale is required to determine if your JCM250 is eligible for Parasound warranty service. We recommend that you make an extra copy of your original purchase receipt/bill of sale and store it inside the JCM250 carton.
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Page 5: Placement & Ventilation Guidelines
While you are unpacking your JCM250, inspect it thoroughly for possible shipping damage and tell your Parasound dealer immediately if you find any evidence of shipping damage. Note: Please save and store both the inner and outer cartons and, most especially, the foam packing inserts to protect the JCM250 if you must move it or ship it. -
Page 7: Rack Mounting
Rack Mounting Your Parasound JCM250 To mount the JCM250 into a 19" wide equipment rack, you must first attach its two “L” shaped rack mount brackets (included). With its four feet removed, the JCM250 chassis and front panel height occupies two rack spaces (3.5" or 88.2 mm). You will also need to allow an additional 1/8" (3.2mm) or more below the JCM250 to allow for its bottom chassis screws when mounting other components below the JCM250. -
Page 8: Bias Level Switch
Rear Panel Controls & Audio Connections Always disconnect the AC cord to your JCM250 before making or changing any input, output, or trigger wire connections. Inserting or removing an input or output cable while the JCM250 is turned on can result in a blast of sound that can damage your loudspeakers. -
Page 9: Audio Input & Output Connections
Audio Input & Output Connections Balanced XLR Input Jacks In most systems balanced XLR connections will give you the best quality sound because of their ability to reject noise. Refer to the Balanced and Unbalanced Lines in the Technically Speaking section for additional information and why we recommend using balanced lines. -
Page 10: Speaker Connections
Speaker Connections Speaker Terminals The JCM250 has a single pair of speaker output terminals. The speaker terminals accept wires terminated with banana plugs, spade connectors up to 16mm wide or bare wire up to 8 AWG. Bare Speaker Wire Ends If you plan to connect your speaker cables with bare wire ends, use a wire stripper to remove just enough insulation to expose about a 1»2"... -
Page 11: Turn On Options
Turn On Options Switch The setting of the rear panel three position Turn On Options switch determines how the JCM250 turns on and off. Setting this switch to Audio or 12 V disables the JCM250’s front panel On-Off button. There are three turn-on options: Manual: When the Turn On Options switch is set to Manual the JCM250 is turned on and off manually only by pressing the On-Off button on its front... -
Page 12: Front Panel Operation
3.5 mm and 2.5 mm Jacks Some other Parasound power amplifiers and preamplifiers might use a 2.5 mm “sub-mini” (mono) trigger jack. To use the JCM250 trigger with products that use a 2.5mm jack you will need a 3.5 mm to 2.5 mm mono adapter for one of the plugs on the included trigger wire. - Page 13 Warranty and for units or situations which are outside the Warranty. The complete warranty can be found at www.parasound.com. Unit is not eligible for repair under the terms of the Parasound warranty if (see Warranty for full exclusion list) •...
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Page 14: Chassis Illustration & Dimensions
Chassis Illustration and Dimensions... -
Page 15: Specifications
Specifications Specifications and features subject to change or improvement without notice. Power Output Total Gain 250 watts@8 Ω 29 dB (Gain switch set to normal) 4 50 watts@4 Ω 23 dB (Gain switch set to low) 8 00 watts @2 Ω Input Sensitivity for 28.28 V into 8Ω...
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