Product Summary


  • 300 Watts per Channel 4Ω

  • 830 Watt Bridgeable Mono Mode 4Ω

  • LED Indicators for Power, Signal, Clip

  • Built-In Protection Circuits



  • 300 Watts per Channel 4Ω

  • 830 Watt Bridgeable Mono Mode 4Ω

  • LED Indicators for Power, Signal, Clip

  • Built-In Protection Circuits

  • User-Defeatable Clip Limiters

  • Balanced 1/4" TRS, XLR, and Strip Inputs

  • Neutrik Speakon Output Connectors

  • High-Current Toroidal Transformers


The QSC RMX850a Power Amplifier, delivering 300 watts per channel at 4Ω, is a reliable 2RU rack-mountable amplifier explicitly designed for live sound reinforcement applications. This amplifier is a workhorse with two Class AB output channels capable of operating in both stereo and mono bridge mode.

Running on a standard 15 amp plug, the RMX850a employs high-current toroidal transformers to ensure reduced noise and enhanced performance, even under the demanding load of 2 ohms. To further enhance audio quality and minimize distortion, the amplifier features independent user-defeatable clip limiters. Additionally, it comes equipped with LED indicator lights that not only signal the presence of a signal but also indicate when the signal is clipping, allowing for precise control and monitoring. The QSC RMX850a is a dependable choice for powering live sound setups with excellence and clarity.

QSC RMX850a Power Amplifier (300 W per Channel)

SKU: RMX850a | UPC: 684284062765
Authorized Dealer Authorized QSC Dealer
Manufacturer Warranty Authorized dealer coverage
Expert Support Pre- and post-sale assistance

$699.99

BACK 2 SCHOOL SALE | additional discount in cart
Request a Quote
QSC RMX850a Power Amplifier (300 W per Channel) $699.99
In Stock Current availability for this model
Free Ground Shipping On qualifying orders to the lower 48 states
Project & Volume Pricing Special pricing available for larger orders
Education & Government Purchase Orders Accepted for qualified organizations
Financing Available with Shop Pay
Special Pricing Available Education • Government • Nonprofits • Corporate • Volume Orders
✓ Tax-Exempt Purchasing Available

Key Features

  • <ul class="list_OMS5rN7R1Z">\n <li class="listItem_OMS5rN7R1Z" data-selenium="sellingPointsListItem">300 Watts per Channel 4Ω</li>\n <li class="listItem_OMS5rN7R1Z" data-selenium="sellingPointsListItem">830 Watt Bridgeable Mono Mode 4Ω</li>\n <li class="listItem_OMS5rN7R1Z" data-selenium="sellingPointsListItem">LED Indicators for Power, Signal, Clip</li>\n <li class="listItem_OMS5rN7R1Z" data-selenium="sellingPointsListItem">Built-In Protection Circuits</li>\n</ul>

Technical Details

Specifications

General
Number of Channels
2
Power Rating
8 Ohms: 185 W per Channel (Full Range, 0.1% THD) 530 W Bridged (Full Range, 0.1% THD) 200 W per Channel (1 kHz, 0.1% THD) 600 W Bridged (1 kHz, 0.1% THD) 4 Ohms: 280 W per Channel (Full Range, 0.1% THD) 300 W (1 kHz, 0.1% THD) 830 W Bridged (1 kHz, 0.1% THD) 2 Ohms: 430 W per Channel (1 kHz, 0.1% THD)
Amplifier Class
Class-AB
Performance
Protections
AC Coupling, On/Off Muting, Open Circuit, Overvoltage, RF, Reactive/Mismatched Load, Short Circuit, Thermal, Ultrasonic
Frequency Response
20 Hz to 20 kHz +0/-1 dB (-3 dB) 5 Hz to 50 kHz (HPF Off, 8 Ohms)
Damping Factor
> 300 at 8 Ohms
Input Sensitivity
1.15 V / 3.4 dBu (at 8 Ohms)
Input Impedance
10 Kilohms (Unbalanced) 20 Kilohms (Balanced)
Max Gain
30 dB
SNR
> -100 dB
THD
4 / 8 Ohms: < 0.03% (Full Range, at Rated Power -10 dB) < 0.03% (1 kHz, at Rated Power)
Intermodulation Distortion
< 0.01% (SMPTE)
Connectivity
Analog Audio I/O
2 x Binding Post Pair Output 2 x speakON Output Block 3-Pin Balanced Input 2 x XLR 3-Pin Input 2 x 1/4" TRS Input
Power
AC Input Power
Factory Set: 100 VAC, 50 / 60 Hz 120 VAC, 50 / 60 Hz 230 VAC, 50 / 60 Hz
Current Consumption
4.5 A
Physical
Display & Indicators
Green LED (Power) Yellow LED (Signal, per Channel) Red LED (Clip, per Channel) Red LED (Protect, per Channel)
Rackmount Size
2 RU
Cooling
Fan (Variable Speed)
Dimensions
3.5 x 19.0 x 15.9" / 89.0 x 482.0 x 404.0 mm
Weight
35 lb / 15.9 kg
Packaging Info
Package Weight
36.4 lb
Box Dimensions (LxWxH)
24 x 22 x 6"
QSC RMX850a Power Amplifier (300 W per Channel)
QSC

QSC RMX850a Power Amplifier (300 W per Channel)

$699.99

Brightness

N/A

N/A

Weight without stand

N/A

N/A

Weight with Stand

N/A

N/A

Duty Cycle

N/A

N/A

Dimensions

N/A

N/A

Aspect Ratio

N/A

N/A

Content

N/A

N/A

Native Resolution

N/A

N/A

Lumens (ANSI)

N/A

N/A

Contrast Ratio

N/A

N/A

Throw Distance

N/A

N/A

Lens

N/A

N/A

Inputs

N/A

N/A

Outputs

N/A

N/A

Display Technology

N/A

N/A

Wireless Networking

N/A

N/A

Speakers

N/A

N/A

Economode

N/A

N/A

Audible Noise

N/A

N/A

Lamp Life

N/A

N/A

Short Throw

N/A

N/A

Aspect Ratio

N/A

N/A

Image Size Diagonal

N/A

N/A

Lens Shift

N/A

N/A

Data / Video Signals

N/A

N/A

Digital Keystone

N/A

N/A

Unit Weight

N/A

N/A

Projector Methods

N/A

N/A

Dimensions (WxDxH)

N/A

N/A

Dimensions (WxDxH)

N/A

N/A

Contrast Ratio

N/A

N/A

Viewing Angle

N/A

N/A

Response Time

N/A

N/A

Sound Output

N/A

N/A

Screen Size

N/A

N/A

Monitor Configuration

N/A

N/A

Display Orientation

N/A

N/A

WiFi

N/A

N/A

Communication Port

N/A

N/A

Refresh Rate

N/A

N/A

General

<div class="group_fDXOr6EpR9">
<table class="table_fDXOr6EpR9" data-selenium="specsItemGroupTable">
<tbody>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv firstSpecWhenNoGroupName_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Number of Channels</td>
<td class="value_KqJ3Q3GPKv firstSpecWhenNoGroupName_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">2</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Power Rating</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv"><b>8 Ohms:</b>
185 W per Channel (Full Range, 0.1% THD)
530 W Bridged (Full Range, 0.1% THD)
200 W per Channel (1 kHz, 0.1% THD)
600 W Bridged (1 kHz, 0.1% THD)
<b>4 Ohms:</b>
280 W per Channel (Full Range, 0.1% THD)
300 W (1 kHz, 0.1% THD)
830 W Bridged (1 kHz, 0.1% THD)
<b>2 Ohms:</b>
430 W per Channel (1 kHz, 0.1% THD)</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Amplifier Class</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">Class-AB</div></td>
</tr>
</tbody>
</table>
</div>
<div class="group_fDXOr6EpR9">
<div class="name_fDXOr6EpR9" data-selenium="specsItemGroupName">Performance</div>
<table class="table_fDXOr6EpR9" data-selenium="specsItemGroupTable">
<tbody>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv " data-selenium="specsItemGroupTableColumnLabel">Protections</td>
<td class="value_KqJ3Q3GPKv " data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">AC Coupling, On/Off Muting, Open Circuit, Overvoltage, RF, Reactive/Mismatched Load, Short Circuit, Thermal, Ultrasonic</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Frequency Response</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">20 Hz to 20 kHz +0/-1 dB (-3 dB)<b></b>
5 Hz to 50 kHz (HPF Off, 8 Ohms)<b></b></div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Damping Factor</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">&gt; 300 at 8 Ohms</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Input Sensitivity</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">1.15 V / 3.4 dBu (at 8 Ohms)</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Input Impedance</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">10 Kilohms (Unbalanced)
20 Kilohms (Balanced)</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Max Gain</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">30 dB</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">SNR</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">&gt; -100 dB</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">THD</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv"><b>4 / 8 Ohms:</b>
&lt; 0.03% (Full Range, at Rated Power -10 dB)
&lt; 0.03% (1 kHz, at Rated Power)</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Intermodulation Distortion</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">&lt; 0.01% (SMPTE)</div></td>
</tr>
</tbody>
</table>
</div>
<div class="group_fDXOr6EpR9">
<div class="name_fDXOr6EpR9" data-selenium="specsItemGroupName">Connectivity</div>
<table class="table_fDXOr6EpR9" data-selenium="specsItemGroupTable">
<tbody>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv " data-selenium="specsItemGroupTableColumnLabel">Analog Audio I/O</td>
<td class="value_KqJ3Q3GPKv " data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv"><b>2 x </b>Binding Post Pair Output
<b>2 x </b>speakON Output
Block 3-Pin Balanced Input
<b>2 x </b>XLR 3-Pin Input
<b>2 x </b>1/4" TRS Input</div></td>
</tr>
</tbody>
</table>
</div>
<div class="group_fDXOr6EpR9">
<div class="name_fDXOr6EpR9" data-selenium="specsItemGroupName">Power</div>
<table class="table_fDXOr6EpR9" data-selenium="specsItemGroupTable">
<tbody>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv " data-selenium="specsItemGroupTableColumnLabel">AC Input Power</td>
<td class="value_KqJ3Q3GPKv " data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv"><b>Factory Set:</b>
100 VAC, 50 / 60 Hz
120 VAC, 50 / 60 Hz
230 VAC, 50 / 60 Hz</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Current Consumption</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">4.5 A</div></td>
</tr>
</tbody>
</table>
</div>
<div class="group_fDXOr6EpR9">
<div class="name_fDXOr6EpR9" data-selenium="specsItemGroupName">Physical</div>
<table class="table_fDXOr6EpR9" data-selenium="specsItemGroupTable">
<tbody>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv " data-selenium="specsItemGroupTableColumnLabel">Display &amp; Indicators</td>
<td class="value_KqJ3Q3GPKv " data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">Green LED (Power)
Yellow LED (Signal, per Channel)
Red LED (Clip, per Channel)
Red LED (Protect, per Channel)</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Rackmount Size</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">2 RU</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Cooling</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">Fan (Variable Speed)</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Dimensions</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">3.5 x 19.0 x 15.9" / 89.0 x 482.0 x 404.0 mm</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Weight</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">35 lb / 15.9 kg</div></td>
</tr>
</tbody>
</table>
</div>
<div class="group_fDXOr6EpR9">
<div class="name_fDXOr6EpR9" data-selenium="specsItemGroupName">Packaging Info</div>
<table class="table_fDXOr6EpR9" data-selenium="specsItemGroupTable">
<tbody>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv " data-selenium="specsItemGroupTableColumnLabel">Package Weight</td>
<td class="value_KqJ3Q3GPKv " data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">36.4 lb</div></td>
</tr>
<tr class="pair_KqJ3Q3GPKv" data-selenium="specsItemGroupTableRow">
<td class="label_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnLabel">Box Dimensions (LxWxH)</td>
<td class="value_KqJ3Q3GPKv" data-selenium="specsItemGroupTableColumnValue">
<div class="expandableValue_KqJ3Q3GPKv">24 x 22 x 6"</div></td>
</tr>
</tbody>
</table>
</div>

N/A

VESA Pattern

N/A

N/A

TAA Compliant

N/A

N/A

PDF Documents

N/A

N/A

Diagonal Size

N/A

N/A

Dimensions

N/A

N/A

Aspect Ratio

N/A

N/A

Sensor

N/A

N/A

Resolution

N/A

N/A

Signal Sysyetm

N/A

N/A

Signal To Noise Ratio

N/A

N/A

Gain

N/A

N/A

Shutter Speed Range

N/A

N/A

Exposure Control

N/A

N/A

White Balance

N/A

N/A

Image Stabilization

N/A

N/A

Image Flip

N/A

N/A

ICR

N/A

N/A

Sync

N/A

N/A

Output

N/A

N/A

Audio Input

N/A

N/A

Audio

N/A

N/A

Camera Control

N/A

N/A

Focal Length

N/A

N/A

Minimum Object Distance

N/A

N/A

Pan Angle

N/A

N/A

Tilt Angle

N/A

N/A

Pan Speed

N/A

N/A

Tilt Speed

N/A

N/A

Presets

N/A

N/A

Operating Temperature

N/A

N/A

Power

N/A

N/A

Power Consumption

N/A

N/A

Minimum Illumination

N/A

N/A

Optical Zoom

N/A

N/A

TAA Compliant

N/A
View product

EXPERT AV HELP

Need Help Choosing the Right AV Solution?

Our AV specialists can help with product selection, system compatibility, project pricing and complete solutions for commercial, education and government applications.