Page 2 - IMPORTANT SAFETY PRECAUTIONS AND EXPLANATION OF SYMBOLS
1 2 IMPORTANT SAFETY PRECAUTIONS AND EXPLANATION OF SYMBOLS WARNING! The lightning flash with the arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous” voltage within the product’s enclosure that may be of sufficient magnitude to con...
Page 4 - Introduction; Features; Stereo mode, both channels driven; Front Panel; – Figure 1 –
3 4 Introduction These rugged, fan-cooled, 2-channel, 2RU amplifiers provide high-value performance and power in a strong, compact chassis. The series comprises four models: the CMX 300V, CMX 500V, CMX 800V and CMX 2000V. The CMX 2000V is covered in a separate manual. Features • Independent, user-de...
Page 5 - Back Panel; Features and setup; Clip Limiter; What it is
3 4 Back Panel 1. Barrier strip input2. XLR inputs, Channels 1 and 23. Configuration dip switches4. TRS inputs, Channels 1 & 25. Fan 6. Speakon™ output, Channel 1 and 2 7. Terminal block connector outputs, Channels 1 and 28. Circuit Breaker9. Serial number label10. Configuration switch chart11. ...
Page 6 - Input Filter
5 6 Input Filter What it is The low-frequency (LF) filter rolls off signals below either 30 Hz or 50 Hz (Figure 6 and 7) . This improves bass performance by limiting sub-audio cone motion, making more power available for the speakers' rated frequency range.The filter settings for each channel are co...
Page 7 - Parallel Input Mode
5 6 Parallel Input Mode What it is The Parallel Input switches let you operate the amplifier in Parallel mode, delivering the same signal to both channels without using a Y cable. Each channel drives its own speaker load, with independent gain, filtering, and clip limiting.Set switch positions 4 and...
Page 8 - Bridge Mono Mode
7 8 Bridge Mono Mode What it is Bridge Mono mode combines the power of both amp channels into one speaker, resulting in twice the voltage swing, four times the peak power, and approximately three times the sustained power of a single channel. This mode uses Channel 1's input, attenuation control, in...
Page 9 - The Difference Between Modes; Stereo Mode
7 8 The Difference Between Modes Stereo Mode Stereo mode is the typical way of using the amplifier. Each channel is fully independent. Separate signals connect at the inputs, the attenuation knobs control their respective channels, and separate speakers connect to each output. The dip switches are s...
Page 11 - Distributed Constant Voltage Outputs; – Table 2 –
9 10 Specifications CMX 300V CMX 500V CMX 800V Stereo Mode (Both Channels Driven) 70 Volt - - 400 W 100 Volt - - - Bridge Mono Mode 70 Volt 600 W 1200 W 2000 W 100 Volt - 600 W 2300 W – Figure 19 – Distributed Constant Voltage Outputs 70 Volt Operation: The CMX 300V and 500V must be configured for B...
Page 12 - Installation
11 12 Installation Rack mounting of the amplifier is optional.Use four screws and washers when mounting the amplifier to the front rack rails.Support the amp at the rear also, especially in mobile and touring use; rear rack mounting ear kits are available from QSC’s technical services department or ...
Page 13 - Connections; Inputs; . The input impedance is 20 k
11 12 Connections Inputs Each channel has active balanced XLR and ¼" (6.3 mm) inputs wired in parallel (Figure 22) . The input impedance is 20 k Ω balanced, 10 k Ω unbalanced. Balanced signals are less prone to AC hum, but unbalanced signals can be suitable for short cable runs. The signal sourc...
Page 14 - SpeakonTM Outputs; Speaker Cabling
13 14 Speakon™ Outputs CMX amplifiers offer a choice of output connections, with two Neutrik NL4MD Speakon™ jacks and a Terminal Block connector.The Speakon™ connector is designed specially for high-power speaker connections. It locks in place, prevents shock hazard, and assures the correct polarity...
Page 15 - Terminal Block Connector; Stereo and Parallel Mode:
13 14 Terminal Block Connector The terminal block connector requires the following assembly.1. Strip the wires to 7 ~ 8 mm.2. Insert the wires into the male part of the connector according to the Mode you are using. See below.3. Use a flat-tip screwdriver to secure the wires. Tighten the screws to 6...
Page 16 - Operation; AC Power Switch; Operating Voltage; On
15 16 Operation AC Power Switch Before applying power, check all connections and turn the attenuation controls fully counter clockwise to maximum attenuation.One second of muting is normal when the amp is turned on or off (Figure 32) . Attenuation Controls The controls are marked with a scale indica...
Page 17 - Fan cooling; Safe operating levels; Troubleshooting; Indication
15 16 Fan cooling The fan speed varies automatically to maintain safe internal temperatures. Keep the front and rear vents clear to allow full air flow. Hot air exhausts out the front of the amp so it does not heat the interior of the rack. Make sure that plenty of cool air can enter the rack, espec...
Page 19 - Specifications
17 18 CMX 300V CMX 500V CMX 800V Stereo Mode (both channels driven) 8 Ω / FTC 20 Hz - 20 kHz / 0.1% THD 8 Ω / EIA 1 KHZ / 0.1% THD 4 Ω / FTC 20 HZ - 20 KHZ / 0.1% THD 4 Ω / EIA 1 KHZ / 0.5% THD 2 Ω / EIA 1 KHZ / 1% THD 70 V - Direct drive / EIA 1 kHz / 1% THD 185 W200 W280W300 W430 W- 260 W300 W400 ...
Page 20 - QSC Audio Products, LLC
Mailing Address: QSC Audio Products, LLC 1675 MacArthur Boulevard Costa Mesa, CA 92626-1468 USA Telephone Numbers: Main Number: (714) 754-6175 Sales & Marketing: (714) 957-7100 or toll free (USA only) (800) 854-4079 Customer Service: (714) 957-7150 or toll free (USA only) (800) 772-2834 Facsimil...
