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This product has been discontinued by the manufacturer. Please contact us to find a replacement.
The Q44 II power amp from Electro-Voice provides 2 x 450W @
4 ohms or 2 x 650W @ 2 ohms. It's an excellent choice for small tops and utility
loudspeakers, such as ZX1, SX Series, or EVID Series.
Dynamic Headroom:
Electro-Voice's philosophy is that tonal performance of live music counts most;
therefore, Electro-Voice amps are designed for dynamic headroom, meaning that
each and every EV amp including the Q44 II 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 EV power amplifiers are designed
to be absolutely stable into loads of 2 ohms.
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. The EV Q44 II and other power amps from the Q
Series combinethe sonic excellence and ruggedness of its Precision Series
predecessors with Class-H innovation, all in a compact and affordable package.
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, Electro-Voice specifies a lot more information on their
amplifiers' dynamic behavior than just "slew rate" figures. Important tests
referring to the amp's ability regarding multitone 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 the Q44 II amplifier and crank it up?you'll hear the
difference immediately.
Protection Package and Dynamic Limiter
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 power amplifiers. This 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.
Electro-Voice Q44 II Power Amplifier Specifications:
Electro-Voice Q44 II Power Amplifier Features: