2. Overview

You could sum up the whole idea of a PA power amplifier in a single word - sound. The power amp is a crucial part of a musician’s live sound. Clarity and quality are more important than volume - even a low volume sound that is distorted is uncomfortable to listen to, whereas a rich, clear sound can fill a large room without driving away the audience.

Technically, a power amp - sometimes known as an output stage - is there to amplify the signal from the mixing desk so that it’s strong enough to drive the PA speakers. The ideal power amp is small and light, but very powerful. It should also be highly efficient, so that it does not require excessive cooling. Inevitably, compromises must be made between all these factors, but there are some superbly engineered models available today that deliver substantial power efficiently and in a manageable form.

Power amps that are well matched to speakers have relatively little impact on the total quality of the sound. Microphones, effects and EQ will have a much greater effect on the fine detail of the sound spectrum, although the more complex that spectrum is, the harder the amp’s job will be.

The key to a good stage sound is consistent stable delivery of the whole signal to the speakers. So the power amp, receiving signals of varying frequencies, must be able to handle a complex load, and move it smoothly out to the front line. At the same time, it must accommodate the load represented by the speakers themselves, a factor made more complicated by the quality of the connecting cables. As far as they are concerned there is a simple rule - the shorter, the better.

Distortion and peaking are the great enemies - your power amp needs sufficient capacity to deal with the highest loads you expect to generate, without delivering a signal that produces a broken sound as soon as it hits the speakers. Naturally, the capacity required depends on the kind of music you are making. You can assume that a heavy metal band will need something more substantial, whereas a string quartet could probably make do with something fairly lightweight, although whatever volume you are playing at, it’s always advisable to have plenty of ‘headroom’.

So you need to consider your requirements carefully, and strike the right balance between performance, portability, and price. Over the next few pages, we’ll give you all the help we can in selecting the right amp for your stage setup.

(3)
Récemment visité
Rode Wireless GO

Système sans fil numérique pour caméra Système d'émetteur et de récepteur ultra-compact et léger, Bande 2,4 GHz, Alimentation : batterie interne LiPo (TX et RX), Durée de fonctionnement Max : 7 heures, Chargement via une prise USB C, Jusqu'à...

(2)
Récemment visité
Arturia MicroFreak

Synthétiseur hybride 25 touches tactiles sensible à la vélocité avec aftertouch polyphonique, Oscillateur numérique avec des techniques de synthèse telles que Karplus Strong, Harmonic OSC, Superwave et Texturer, Filtre variable d'état analogique (-12 dB / oct.) avec caractéristiques sélectionnables...

Récemment visité
Native Instruments Komplete Audio 6 MK2

Interface audio 6 canaux Résolution : 24 Bit / 192 kHz, 2 entrées micro/ligne/instrument : XLR/jack 6,3 mm, 2 entrées ligne : jack 6,3 mm, 4 sorties ligne : jack 6,3 mm Couplé DC, Entrée S/PDIF coaxiale, Entrée et...

Récemment visité
Mooer GE 300

Multi-Effects Processor Integrated ToneCapture function with 4 modes (Amp / Stomp / Guitar / Cab) to capture the sound of your favourite gear, 108 High quality amp simulations, 43 IR (Impulse Response) speaker cab simulations, Support for additional Impulse...

(3)
Récemment visité
TC Electronic Polytune 3 Noir

Tuner for Electric Guitar Polyphonic tuner and buffer, Bonafide buffering gets the sound through long cable runs and multiple effects, Polyphonic tuning makes it possible to tune all the strings simultaneously, Fast chromatic tuner with 0.5 cent accuracy, Precise...

Récemment visité
K&M 21427

K&M 21427, professional carrying case for 6 microphone stands, includes castors for easy and comfortable transport, case made of extremely durable 1680D nylon fabric, all seams hand-stitched in high quality, padded carrying handles and a durable zipper, castors included, dimensions:...

Récemment visité
RCF Art 312 MK III

Enceinte large bande passive 12" + 1" Équipé d'un haut-parleur 12" et d'un tweeter avec membrane en Mylar de 1,5" avec bobine de 1", Puissance: 300 Watt (RMS), Impédance : 8 Ohm, SPL Max : 127 dB, Dispersion...

Récemment visité
iZotope Neutron 3 Standard Crossgrade

Plugin tranche de console - Version téléchargement Crossgrade à partir de tout produit iZotope enregistré (sauf DDLY, Moebius et tous les plugins gratuits) Visual Mixer et Relay donnent une vue d'ensemble du mixage et permettent le contrôle...

Récemment visité
ADJ Contour

ADJ Contour; LED mirror ball effect; multi-colored beams crisscross back and forth at different speeds similar to a classic "fan style" effect; 36 lenses that project multi-colored beams of light from 27x 1.5W RGB LEDs; 15 built-in lightshows; controlled by...

Récemment visité
J. Rockett Audio Designs The Dude V2

Effect pedal for electric guitar Overdrive, Delivers classic D-Style ODS sounds and feel, Less aggressive volume controller than previous version, True bypass, Controls for Level, Ratio, Treble and Deep, Bypass footswitch, Input / Output: 6.3mm mono jacks, Metal housing,...

Récemment visité
Fender CLSC SRS Mustang/Duo Case

Etui rigide Pour modèles Mustang & Duo Sonic, Doublure intérieur en peluche rouge, Poignée en acier revêtue de vinyle, Grand compartiment pour accessoires avec couvercle, Fermetures en acier dont 2 verrouillables, Jeu de clés, Accastillage chromé 3 fois, Dimensions...

Récemment visité
iZotope Music Production Suite 2.1 CG2

Ensemble de plugins - Version téléchargement Crossgrade d'iZotope Music Production Suite 2, Music Production Bundle 1/2 ou RX Post Production Suite 3 vers Music Production Suite 2.1 Vaste collection d'outils logiciels pour la production, le mixage et...

Donner un feedback
Feedback Avez-vous trouvé une erreur ou souhaitez-vous commenter cette page?

Nous apprécions vos commentaires et mettons tout en œuvre afin de résoudre les problèmes le plus rapidement possible.