About the QSC RMX1450a
Highlights:
General Information:
- 2-channel pro audio amplifier
- power output at 20-20000 Hz
- 260 watts FTC per channel at 8 ohms
- 400 watts FTC per channel at 4 ohms
- power output at 1 kHz:
- 300 watts EIA per channel at 8 ohms
- 500 watts EIA per channel at 4 ohms
- 900 watts EIA (mono) at 8 ohms in bridged mode
- 1400 watts EIA (mono) at 4 ohms in bridged mode
- frequency response: 20-20000 Hz
- signal-to-noise ratio: -100 dB
Features:
- independent right- and left-channel gain controls on front panel
- DC, short circuit, and overload protection
- variable speed fan for heat dissipation
- rack-mountable
- front-panel LEDs indicate Power and Clipping
- inputs: XLR, 1/4" TRS, and screw terminals for channels A and B
- outputs: Neutrik Speakon jacks, 5-way binding posts
- weight: 40 lbs.
- dimensions: 3-1/2"H x 19"W x 16"D
- warranty: 3 years
- MFR # RMX1450a
- Item # 907RMX1450
What's in the box:
- 2-Channel amplifier
- 58" AC power cord
- 2 Rack-Mount brackets (installed)
- Hookup Drawings
- Important Safety Instructions
More details on the QSC RMX1450a
Features & specs
| General | ||
|---|---|---|
| Number of Channels | 2 | |
| Power Class | AB | |
| Watts per channel 8 ohms | 260 | |
| Watts per channel 4 ohms | 400 | |
| Watts per channel 2 ohms | 700 | |
| Watts bridged | 1400 | |
| Fan cooled | Y | |
| DSP | Y | |
| Filters | Y | |
| Rack spaces | 2 | |
| Height (inches) | 3-1/2 | |
| Depth (inches) | 16 | |
| Width (inches) | 19 | |
| Weight | 40 lbs | |
| Inputs | ||
| RCA | --- | |
| 1/4" | 2 | |
| XLR | 2 | |
| Outputs | ||
| 1/4" | --- | |
| Binding post | 4 | |
| Spring post | --- | |
Product Research
Features
2-Channel Amplifier: The QSC RMX 1450a employs a two-channel class AB amplifier with a high-current toroidal transformer for low impedance, greater power, and little noise. RMXa power ratings:
| Operation Modes | Ohm Load | Power Rating | Frequency Response | THD |
|---|---|---|---|---|
| Stereo (2ch) | 8Ω | 260W | 20-20kHz | 0.1% |
| 4Ω | 400W | 20-20kHz | 0.1% | |
| 2Ω | 700W | 1kHz | 1% | |
| Bridged (1ch) | 4Ω | 1400W | 1kHz | 1% |
Operation Modes: The amplifier can be set for normal Stereo operation, Parallel input Mode, or Bridge Mono Mode.
- Stereo Mode: Each channel remains independent; the amplifier may be used for two different signals.
- Parallel Mode: This setting connects both inputs together; one signal feeds both channels. Each channel's Gain control and loudspeaker connection remain independent.
- Bridge Mode: This setting combines both channels into a single channel with twice the output power. Use only the first channel's input and Gain control. Set the second channel's Gain control at minimum.
Inputs: The QSC RMXa series amplifier provides XLR, 1/4" TRS, and barrier strip screw terminal input connectors to connect your external audio sources.
Outputs: The RMXa series amplifier offers Speakon (NL4) and binding post output connectors to connect your loudspeakers.
Independent Controls: The QSC RMXa series amplifier offers independent Gain, Clip Limiter, and Lower Frequency Filters for each channel (1-2). These controls are front-mounted for easy access.
- Gain: Turn the Gain controls for each channel (1-2) clockwise to increase Gain and counterclockwise to decrease Gain. At the maximum setting, the voltage Gain of the amplifier is +36 dB.
- Clip Limiters: Each channel has a Clip Limiter with its own on-off switch to reduce distortion. The limiter only responds to actual clipping, and automatically compensates for load and voltage variations. Clip limiting is generally recommended, especially to protect high frequency drivers.
- Low Frequency Filters: Each channel has a 12dB per octave Low Frequency Filter (30 or 50Hz) to prevent cone over-excursion, making more power available for the loudspeaker's rated frequency range. This reduces distortion and prevents amplifier overload. The Filter should only be turned off for driving subwoofers with special low frequency capability. Otherwise, unless you have filtering in the signal path preceding the amplifier, use the Low Frequency Filter
LED Indicators: The LED indicators on the front-panel of the amplifier can be used to monitor system operation and identify common problems.
- Power: A single blue indicator will illuminate when powered on; no illumination when powered off.
- Signal: A green indicator for each channel will illuminate when the input signal exceeds -35 dB. As signal approaches full power, the indicator will illuminate continuously.
- Clip: A red indicator for each channel will illuminate whenever the amplifier is driven beyond full power.
- Protect: A single red indicator will illuminate when the amplifier goes into protect mode. Under normal operation, this indicator will not be illuminated.
Protection Circuitry: Independent DC and thermal overload protection on each channel automatically protects the amplifier and your connected speakers.
Cooling Fan: Cool air is drawn into the rear of the amplifier by the cooling fan. Warm air exits the front of the amplifier.
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