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    QSC RMX 1850HD Professional Power Amplifier, 900 Watts

    Selectable low-frequency filters. Clip limiters.

    This product has been discontinued or is no longer sold by SameDayMusic.

    We recommend this product instead:

    QSC RMX 2450a Power Amplifier


    The QSC RMX 2450a Power Amplifier provides professional sound quality, features and reliability at a price that won't break the bank. With 750W per channel at 4-ohms, the RMX 2450a is ideal for small to mid-sized systems. > More

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    Product Rated 8.6 Out of 10 (15 ratings)

    QSC RMX1850 HD Power Amplifier Product Description

    QSC's RMX series amplifiers give you clean, dynamic power with legendary QSC sound quality and reliability that pros depend on. QSC combined their rugged, high-output designs with the finest circuit technology to deliver unmatched performance at a breakthrough price. RMX amps have balanced XLR and 1/4" TRS inputs. Outputs include binding posts and Neutrik Speakon connections. These stereo power amps are only 2 rack spaces tall and 15.9 in. deep. Other features include ultra low distortion (.05% THD), a low-noise variable speed fan with rear-to-front air flow to keep your amplifier and racks cool, and selectable low-frequency filters to protect your speakers and increase headroom. QSC power amps are backed by a 3-year transferable warranty.

    Muscular Power Plant

    The power supply is the heart of an amplifier, converting raw AC power from the wall to clean DC for the audio circuitry. The RMX uses a powerful high-current toroidal transformer and ample filter capacitance to ensure generous energy reserves. This makes a critical difference in sound quality, allowing the amp to effortlessly punch out high level transients, even when driving abusive 2-ohm speaker loads.

    Superior Performance

    RMX amplifiers deliver true studio-quality sound. A full complementary output circuit using the highest-grade linear output devices delivers ultra-low distortion (<0.05% THD) & a ruler-flat frequency response. SMT (Surface Mount Technology) triples small-signal component density, enabling them to pack up to 2400 watts of power in a chassis only 2 rack spaces & less than 16" deep. And unlike other designs, RMX output devices are direct-mounted to the heat sink for optimum thermal coupling & cooling.


    - The RMX 1850HD provides improved thermal performance that gives you higher continuous power in 2-ohms stereo or 4-ohms bridged applications (a RMX 1850HD exclusive!)
    - Independent defeatable clip limiters reduce distortion without sacrificing peak performance.
    - Selectable low-frequency filters boost system response, protect speakers and ensure low-end tightness by more precisely matching the amplifier's range to the loudspeakers.
    - Barrier strip, XLR and 1/4 in. balanced inputs plus Speakon and binding post outputs provide easy connections.
    - Low-noise variable speed fans with rear-to-front air flow keep amplifiers and racks cool.

    Same Day Music is an authorized dealer of QSC products.

    QSC RMX 1850HD Technical Description

    Continuous Power Output Wattage
    360W per channel @ 8 ohms
    600W/channel @ 4 ohms
    900W/channel @ 2 ohms
    1150W bridged mono @ 8 ohms
    1800W bridged mono @ 4 ohms

    Distortion (Typical):
    20 Hz-20 kHz: 10 dB below rated power Less than 0.03% THD 4 and 8 ohms
    1.0 kHz and below: full rated power Less than 0.03% THD 4 and 8 ohms

    Frequency Response: 20 Hz-20 kHz, +/- 1 dB, -3 dB points: 5 Hz-50 kHz

    Damping Factor, 1 kHz and below: Greater than 300 at 8 ohms

    Input Impedance: 10 k ohms unbalanced, 20 k ohms balanced

    Input Clipping: 10 Vrms (+22 dB)

    Cooling: Continuously variable-speed fan, rear-to-front air flow

    Connectors, each channel:
    Input: Active balanced; barrier strip, XLR and 1/4" (6.3mm) TRS tip and XLR pin 2 positive
    Output: touch-proof binding posts and Neutrik Speakon

    Front: AC switch, Ch. 1 and Ch. 2 gain knobs
    Rear: 10-position DIP switch

    Power On: Green LED
    Signal: Yellow LED, 1 per channel
    Clip: Red LED, 1 per channel

    Amplifier Protection:
    Full short circuit, open circuit, thermal, ultrasonic, and RF protection
    Stable into reactive or mismatched loads
    Load Protection: On/off muting, AC coupling (850, 1450), triac crowbar (2450, on each channel)

    Dimensions: 19 in. (48.3 cm) rack mounting, 5.25 in. (8.9 cm) tall (3 rack spaces), 15.9 in. (40 cm) deep (rack mounting to rear support ears)

    Power Requirements: 100, 120, 230 VAC, 50-60 Hz

    Note: Register your new product online with QSC and receive a Free 6-Year Extended Warranty upgrade (a $99 value).

    Same Day Music is an authorized dealer of QSC products.

    QSC RMX1850 HD Power Amplifier Catalog Description

    Reliable, clean, dynamic QSC power@Flat frequency response and super-low distortion@Defeatable clip limiters on each channel; switchable low-cut filter@Variable-speed fans with rear-to-front air flow@360 watts per side at 8 ohms; 1800 watts at 4 ohms bridged mono@Barrier strip, XLR, and 1/4" inputs; Speakon and binding post outputs

    Same Day Music is an authorized dealer of QSC products.

    User Reviews for QSC RMX1850 HD Power Amplifier

    Product Rated 8.6 Out of 10 (15 ratings)
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