Electro-Voice Q99 1250 watts per channel class-H power amplifier EV-Q99 EV-Q99

0.00 2040-01-02 USD InStock
Weight: 38 lb
Brand: Electro-VoiceElectro-Voice

Call for price : 973-731-7131

Contact us for more information

The Electro-Voice Q99 power amp is a 2 x 900 Watts @ 4 Ohms / 2 x 1250W @ 2 Ohms unit that can serve as combined top & sub drive for most club-sized systems, such as Tour X or QRx.

Innovative Class-H power

With Q Series' efficient Class-H design, the permanent voltage rail is designed to cover the average music signal, rather than permanently supplying the voltage for maximum output power. If dynamic peaks require a higher output voltage, the voltage rail is switched to the maximum. This process saves up to 50% of the power consumption found in conventional amplifier design, and results in a dramatic reduction in heat output. Q Series combines the sonic excellence and ruggedness of its Precision Series predecessors with Class-H innovation, all in a compact and affordable package.

While many people understand there are tremendous differences between professional loudspeakers, many also tend to think that amplifiers are only differentiated by the amount of output power they provide. Electro-Voice amplifiers serve to prove that there are also audible differences.

Dynamic Headroom

Amplifier power and distortion figures are typically specified with sine wave signals. However, music signals are far more dynamics than sine waves, comprising a pulsed wide band spectrum.

EV believes that, above all figures, the tonal performance of live music counts most; therefore, all of their amplifiers are designed for dynamic headroom. This means that each and every EV amp has at least 30% more output capability for short-term signals, when compared to a long-term sine wave value. This additional headroom results in an amp that will, for example, allow for short term signal peaks of at least 780W when spec'd 600W.

While dynamic headroom is audible when playing music through a sound system, another specification to observe is the increase in output power from an 8 ohm load to 4 ohms, and then down to 2 ohms. Of course, all Electro-Voice amplifiers are designed to be absolutely stable into loads of 2 ohms.

Transient Response

When processing dynamic signals, other important criteria are signal speed and dynamic distortion. For example, kick drum signals carry pulses of many frequencies as an overlay spectrum. Therefore, and in contrast to many other manufacturers, EV specifies a lot more information on their amplifiers' dynamic behavior than just "slew rate" figures. Important tests referring to the amp's ability regarding multi-tone signal pulses are expressed by IMD-SMPTE measurements at high power levels. And, while IMD tests show the Intermodulation Distortion behavior (how much "sound" is added by the amplifier), DIM30 is the real spec for speed in an amplifier. All these tests are carried out in EV labs during an amplifier's design phase, to ensure maximum sonic performance. While these technical explanations appear very complex, they are clearly audible. Take a Q Series amplifier and crank it up - you'll hear the difference immediately.

Protection Package & Dynamic Limiter

There are many good-sounding amplifiers available; however, for an amp to be considered the world's best requires unparalleled reliability in real-world applications.

Q Series amplifiers benefit from decades of professional amplifier design, and all the expertise that has made EV amps the concert/touring standard is built into Q Series. Our complete protection package includes sophisticated circuits against overheating, short circuit, DC output voltage, HF oscillation, back EMF (Electromotive Force), and destructive peak current.

Furthermore, Q Series amps also protect your valuable loudspeakers with built-in dynamic limiters, preventing dangerous output clipping. The limiters immediately reduce amp gain when dynamic headroom is pushed to the limits at maximum output, keeping distortion below 1% in a situation that can otherwise cause a signal to clip, which is often fatal for woofers and drivers.

Q-Series Amplifiers & Connectivity

Whatever application you choose, you can be sure your Q Series amp is prepared:

  • Both inputs have a paralleled loop thru XLR output to route signal toother amp inputs
  • Besides the usual channel A & B outputs via Speakon connectors (on pin1+/1-), output A carries the signal of channel B as well (on pin 2+/2-),providing an easy drive option for bi-amped speakers
  • Parallel & Bridge Mode option switches provide additional functionality with minimized cabling requirements
  • An additional switchable LPN (Low-Pass Notch) filter provides extra tonal fundament and kick, with protective Low-Cut for using smaller passive 12"or15" cabinets without additional subwoofers


Amplifier Gain

32 dB

Continuous Rated Power (1 kHz, THD 1%) 2Ω

1250 Watts

Continuous Rated Power (1 kHz, THD 1%) 4Ω

900 Watts

Continuous Rated Power (1 kHz, THD 1%) 8Ω

550 Watts

Continuous Rated Power (20-20 kHz, THD<0,2%) 4Ω

800 Watts

Continuous Rated Power (20-20 kHz, THD<0,2%) 8Ω

400 Watts


Front-to-Rear, 3-stage fans

DIM 30


Electronics Type


Frequency Response

10 Hz - 40 kHz ±1 dB


2/4/8 Ω

Input Impedance (Balanced)

20 kΩ

Input Sensitivity

+5.1 dBu

Intermodulation Distortion (SMPTE)


Mains Voltage

100 V, 120 V, 230 V or 240 V; 50-60 Hz (factory configured)

Maximum Bridged Output 4Ω

2800 Watts

Maximum Bridged Output 8Ω

1800 Watts

Maximum Input Voltage

+21 dBu 8.69 Vrms

Network Control (IRIS-Net)


Signal-to-Noise Ratio (A-weighted)

109 dB

Slew Rate

27 V/µs



Total Harmonic Distortion



2RU 88.1 mm (3.47")


483 mm (19.02")


421.5 mm (16.59")

Weight Net

16.3 kg (35.94 lbs)

Brand URL : http://www.electrovoice.com/searchresults.php?searchinput=q99&x=0&y=0

Connect With dB Sound Store Today

Please contact dB Sound Store using the Contact form to the right. We will respond to you quickly by email or telephone regarding Sound Equipment purchases, maintenance, repair, custom Sound System Design and expert installations. Let us know how we can help you today!

Since 1992, dB Sound Store has worked with some of the biggest artists, producers and commercial studio owners in the music industry to meet all of their diverse needs. The extensive client list of top industry professionals speaks to dB Sound's commitment to excellence. Unlike many of our competitors we listen to what you want, provide it at a reasonable cost and support the end result long after the job is finished.  OUR CLIENT LIST
dB Sound Store, LLC
33 Yale Terrace
West Orange
New Jersey, 07052
Call Us: 973-731-7131

Contact dB Sound Store