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MPR-1K Six-Channel Power Amplifier

The Miles Technology MPR-1K is the next step in technology for multichannel audio systems. Utilizing the popular six-channel format, high power is available in a compact package through the use of high-efficiency Class-D amplifier technology.

Modular construction allows a choice of various input configurations and connector options. And each of the six output modules is like a separate power amplifier with a multi-detent gain control, compressor, limiter, low-cut filter, and input selector.

The MPR-1K is perfectly suited for multichannel applications including distributed sound, high-power surround systems, theater systems, multi-way sound reinforcement systems, multichannel stage monitoring, A/V and multimedia systems, and other applications where accurate sound, robust performance, and high reliability are desired. It is designed and built for continuous, demanding use.

The six independent channels can deliver a total of over 1,000 continuous watts with high efficiency, excellent dynamic response, and excellent fidelity. Each channel by itself can easily produce 240 watts at 4 ohms or 170 watts at 8 ohms at 0.15% THD. When all channels are driven simultaneously to full power, continuous output is 170 watts at 4 ohms or 130 watts at 8 ohms.

The switchable compressor and limiter at each output channel is designed for a very dynamic and musical sound. The compressor provides a 2:1 compression ratio with a thres-hold at 10 dB below clipping.

The straight-path design of the MPR-1K is the essence of simplicity. It yields clean, accurate, and dynamic sound. The high-current power supply is routed to the output modules through heavy-gauge cabling and quad-ganged connector contacts. Each output module has its own power supply capacitors which provide im-mediate local current capability on demand. Meanwhile the entire power supply is available to any and all channels which may demand more power than the others.

Input options include balanced, barrier-strip connections, gold RCA connections, or balanced inputs with either XLR/" connectors or screw-terminal plugs and crossover filters.

Made with pride in the U.S.A., the Miles Technology MPR-1K amplifier is backed with our comprehensive three-year warranty.

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MPR-1K Specifications

Continuous Output Power 8 ohms, 0.2% THD: 1 channel - 200 W 2 channels - 180 W each 6 channels - 110 W each 4 ohms, 0.2% THD: 1 channel - 270 W 2 channels - 225 W each 6 channels - 170 W each Load Impedance
Drives any load; current-limited output is designed for 4-to-8 ohm loads. Frequency Response 20 Hz to 20 kHz, +0/-1.5 dB THD + Noise <0.2%, 1 kHz, at rated output 0.15%, typical residual Note: characteristic distortion is almost entirely 2nd harmonic Signal To Noise Ratio 20 Hz to 20 kHz, unweighted: >90 dB Voltage Gain Each channel: off to 30 dB Input Sensitivity 1.0 V for rated output AC Power 120 V or 240 V, 50/60 Hz. Dimensions 3.5 in. x 19 in. x 13.3 in. (8.9 cm x 48.3 cm x 33.8 cm) Weight 36 lbs (16.3 kg) shipping weight Indicators Power: Blue light on the front panel indicates that the unit is powered. Signal Presence: Green lights on the front panel for each channel indicate presence of output signal. Comp: A yellow indicator at each channel lights during gain reduction. This indicates compression or limiting depending on the selector position. Clip: A red light at each channel indicates the onset of clipping (moderate intensity) and audible distortion (bright intensity). Protect: A red light on the front panel indicates when any channel is in protect mode. A steady clip indication with no signal indication at any channel, along with the protect indicator, shows the channel(s) which are in protect mode. Temperature Protection An over-temperature condition sensed at any channel will induce a protect condition for that channel. When the temperature returns to a safe level then the channel will be enabled again automatically. Input/Output Input Connectors: MPR-1K-R: Gold RCA (unbalanced) jacks. MPR-1K-S: Balanced barrier strip screw-terminal connections MPR-1K-T: Balanced screw-terminal connections on removable plugs. MPR-1K-X: Balanced 1/4" and XLR combo connectors. Input Impedance: R or S input module: 15K ohms differential X or T input module: 20K ohms differential Output Connectors: Heavy-duty binding posts/double banana jacks; accommodate up to 10-gauge cable. Controls - Front Panel Power: Rocker switch on the front panel for turning the unit on or off. Controls - Rear Panel Gain Controls: allow the gain of each channel to be set independently. 21 detents allow positive, repeatable settings. Input Source: Three-position switches at each output allow normal/flat operation, selection of 100 Hz 1st-order high-pass filter, or selection of the previous channel's signal as input source. Anti-Clip: allows selection of either compressor or limiter at each channel's output if desired.

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