General
Model	PMX-911 R
Amplifier power	3 x 300 W @ 4 Ohm
THD	0,05 % (Mic to Poweramp)
Frequency range	20 Hz – 20 kHz
Input sensitivity MIC	-50 dBu
Input sensitivity LINE (CH 1–7)	-20 dBu
Input sensitivity LINE (CH 8–11), AUX, TAPE	-10 dBu
Output level Main-Out, Monitor-Out, EFX-Out	+4 dBu
Output level Rec-Out	-10 dBu
Channel EQ highs	±15 dB at 12 kHz (Shelving)
Channel EQ center frequency	±12 dB at 2.5 kHz (Peaking)
Channel EQ depths	±15 dB at 80 Hz (Shelving)
Master EQ	3 x 7-band graphic EQ (125 Hz – 8 kHz)
Phantom voltage	+48 V DC, centrally switchable
Signal-to-noise ratio / crosstalk attenuation	> 90 dB
Effects	Reverb/Delay, adjustable with Feedback, Time, Balance
Effect send	For external effects
Effect control	via foot switch (toggle)
Current supply	220–240 V AC / 50–60 Hz
Type of fuse	T6,3A
Power consumption	1350 W

The PMX-911 R from RCS Audio-Systems is a professional Power-Mixer designed for use in live sound applications, fixed installations, rehearsal rooms, or mobile sound reinforcement systems. The device combines a mixing console and amplifier section in a single housing, offering a compact, powerful solution for musicians, sound engineers, and event organizers. With three integrated power amplifiers, extensive channel management, a digital effects processor, and an intuitive control interface, it is an all-in-one device for demanding audio setups.

Applications

The PMX-911 R is designed for professional applications requiring high amplifier power and flexible signal processing. It is particularly suitable for live events, rehearsals, small to medium concerts, as well as mobile sound reinforcement systems, where a compact yet powerful unit is needed. The integrated amplifier section allows operation of speakers without an additional power amplifier, simplifying installation and reducing space requirements.

Functions and Equipment in Detail

The device features 9 microphone inputs (XLR) and 9 line inputs (jack), with channels 8 to 11 capable of stereo use. Each channel is equipped with a 3-band EQ, allowing independent adjustment of highs, mids, and lows. The high and low frequency controls use shelving filters at 12 kHz and 80 Hz respectively, while the mid control uses a peaking filter at 2.5 kHz. Additionally, each channel includes pan, effect, and monitor controls. Channels 1 to 7 feature PAD switches that reduce the input signal level by -10 dB to prevent overloading when handling high-level signals.

Technology Explained Simply

The internal amplifier section delivers a maximum power output of 3 x 300 W at 4 Ohm impedance. In stereo mode (L/R), 2 x 300 W are available, while in bridged mono mode (L+R), a power output of 600 W can be achieved. The monitor path features its own amplifier with 300 W at 4 Ohm. At 8 Ohm impedance, the power output is 3 x 200 W. The amplifier power is thus flexibly usable depending on the output requirements. The THD (Total Harmonic Distortion) is 0.05 %, indicating high signal purity. The frequency range covers 20 Hz to 20 kHz, encompassing the entire audible spectrum.

An integrated DSP effects processor provides reverb and delay effects, which can be individually adjusted via parameters such as feedback, time, and balance. The effects can be routed to the master and monitor paths. A jack connection for a footswitch allows the effect to be turned on and off, which is practical during live performances. Additionally, an effects send output is available to connect external effects units.

Compatibility and Accessories

The PMX-911 R is equipped with a centrally switchable +48 V phantom power supply, which is required for condenser microphones. The level meters provide visual monitoring of signal levels. The Main-Out, Monitor-Out, and EFX-Out outputs deliver an output level of +4 dBu, typical for professional systems. The Rec-Out connection has a level of -10 dBu, suitable for recording devices. The three separate 7-band graphic equalizers for stereo master, mono bridged, and monitor outputs allow targeted frequency adjustment according to speaker and room acoustics.

Mounting and Installation

The device is designed in 48,3 cm ( 19 inch ) rack format (5 HE) with dimensions of 483 x 205 x 270 mm (W x H x D) and can be installed in standard rack systems. Power supply is via 220–240 V AC at 50–60 Hz. The fuse has a rating of T6.3A, and the maximum power consumption is 1350 W. The device weighs 15.3 kg and is thus designed for professional use.

Advantages in Operation

The PMX-911 R combines mixing console and amplifier functions in a single unit, reducing the number of required components and simplifying installation. Flexible channel management, integrated effects, and detailed EQ control enable precise sound tuning. The central phantom power supply and routing options for additional stereo inputs increase flexibility. The robust construction and high power output make the device a reliable solution for professional applications.