® ZoneMaster Model 2350 TM Universal Two Channel Amplifier with Sub Crossover Owner’s Manual
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. TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER.
Parasound® ZoneMaster ™ 2350 Owner’s Manual Page 3
INTRODUCTION Congratulations on your purchase of this precision audio product and thank you for selecting Parasound. We are proud to offer you this versatile amplifier, knowing that it will bring you many years of enjoyment and dependable operation. Please take a few moments to read the following instructions so you can enjoy all the benefits of your new ZoneMaster 2350’s advanced performance capabilities. You can find details of the ZoneMaster 2350’s specifications and advanced technology at www.parasound.
Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Placement and Ventilation Guidelines . Front Panel Buttons and Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Rear Panel and Audio Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loop, Mono and Sub RCA Output Jacks . . . . . . . . . . . . . . . . . . . .
Unpacking your ZoneMaster 2350 & Placement Guidelines Unpacking Your ZoneMaster 2350 Carefully remove your ZoneMaster 2350 from its shipping carton and locate its AC power cord and these included accessories: One 12V trigger wire with mono 3.5mm mini plugs at both ends. 2U rack mounting kit 16AWG power cord While you are unpacking your ZoneMaster 2350, inspect it thoroughly for evidence of possible shipping damage and tell your Parasound dealer immediately if you find any.
Front Panel Buttons and Display Power Button If the Turn On Options switch (on the rear panel) is set to the Manual position, pushing the Power button turns the Model 2350 on and off. When it’s turned on the ring around the Power button and the 2 channel status indicators will all illuminate green. Pushing the Power button again turns the unit off. If the rear panel Turn On Options switch is not set to “Manual” the front panel Power button will not operate.
Rear Panel and Audio Connections Always disconnect the AC cord to your ZoneMaster 2350 before plugging in or unplugging any connections. Inserting or removing an interconnect cable’s plug while this power amp is turned on can result in a burst of sound that can damage your loudspeakers. Make sure there is no strain or tension on any input cables, speaker wires, DC trigger wires or the AC cord that could cause them to pull loose.
Audio Output Connections Loop Out Jacks These jacks enable the incoming audio signal to pass along or “daisy chain” from the Line level L and R Input jacks to an additional amplifier. The Speaker Level Input connection is converted to line level and is also available at the Loop Out jacks. The Loop Out jacks are not affected by any of the Model 2350 control settings. Mono Out Jack (Full Range) The mono output combines the Left and Right channel inputs into summed L + R mono.
Channel Level Controls Each channel has its own Level control. Fully counter-clockwise is full attenuation and no sound will be heard from that channel. Fully clockwise is maximum volume. We deliberately made the Level control shafts very short so they are less likely to be turned unintentionally. When the 2350 is installed in an equipment rack you may find it easier to use a small Phillips head screwdriver to adjust the Level controls.
Turn On Options The setting of the rear panel Turn On Options switch determines how the amplifier turns on and off. Setting the Turn On Options switch to Audio or 12V disables the 2350’s front panel Power button. There are three positions for this switch: Manual: When the Turn On Options switch is set to Manual the Model 2350 is turned on and off manually only by pressing the Power button on its front panel every time you want to listen to music.
High Pass Filter Switch Using the High Pass Filter can improve the sound in many installations. It’s called a “high pass” filter because depending on the switch position it permits signals higher than 30 Hz or 80 Hz to pass, while preventing signals below these frequencies from passing. There are three positions for this switch: Off: The Off setting bypasses the filter so the Model 2350’s frequency response is full range (flat).
Output Mode Switch There are three positions for this switch which enable the 2350 to operate in three different modes. See pages 14-16 for example diagrams of each Mode. Stereo: The Stereo setting routes the Left channel Input signal to the Left channel Speaker A and B terminals and the Right channel Input signal to the Right channel Speaker A and B terminals. The Stereo option is used for a standard stereo system with a left and right speaker.
Driving Multiple Speakers or Subwoofers The Model 2350’s high current plus 2 ohm stable design enables it to drive multiple speakers. Each of the two channels can drive a 2 ohm load when connecting full range stereo or mono speakers. Subwoofers require much more power than a typical full range speaker and because of this the recommended minimum impedance is 4 ohms per channel when driving subwoofers.
Mono Speakers: Number of mono speakers 2 2 4 4 6 6 8 8 Impedance of speakers 8Ω 4Ω 8Ω 4Ω 8Ω 4Ω 8Ω 4Ω Load per amp channel 8Ω 4Ω 4Ω 2Ω 2.7 Ω 1.
Subwoofers: Number of subwoofers 1 1 2 2 4 4 Impedance of subs 8Ω 4Ω 8Ω 4Ω 8Ω 4Ω Load per amp channel 8Ω 4Ω 8Ω 4Ω 4Ω 2Ω Power to each sub 350 Watts 600 Watts 350 Watts 600 Watts 300 Watts Not recommended All power ratings are RMS, 20-20 kHz, both channels driven Reducing Hum or Buzz Heard in the Speakers - Cable TV is the most common source of hum or buzzing background noise in a system.
Frequently Asked Questions The unit will not turn on - Check the setting of the Turn On Options switch (The front panel Power button is disabled if the switch is set to Audio or 12V). - Check that the AC power is live and that the rear panel master power switch is turned on. When the AC power is live and the unit is turned off, the Power button will illuminate red.
Maintaining Your ZoneMaster Model 2350 Your ZoneMaster 2350 requires no periodic maintenance and has no user serviceable parts inside. To avoid risk of electric shock do not remove the top cover. To keep it clean use only a soft cloth moistened with a few drops of clear water or window cleaner. Never use any solvents or abrasives. Are You Having Difficulty? Warranty Repair Call your Parasound dealer first.
Specifications and Details Power Output – RMS, Both Channels Driven (20 Hz – 20 kHz) 350 watts x 2 @ 8 Ω 600 watts x 2 @ 4 Ω or 2 Ω Minimum Speaker Impedance (Output A+B) Stereo or Mono Mode: 2 Ω Subwoofer Mode: 4 Ω Note: Operation at these minimum impedances might require additional ventilation. Frequency Response 10 Hz – 70 kHz, +0/-3 dB 20 Hz – 20 kHz, +0/-0.8 dB Total Harmonic Distortion < 0.05 % at typical listening levels < 0.
Parasound Products, Inc. 2250 McKinnon Ave, San Francisco, CA 94124 Customer Service: 415-397-7100 www.parasound.
