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Poradniki online Thomann: PA-Amps

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.

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Wysylka blyskawica! Towar profesjonalnie zapakowany, w rzeczywistosci ladniejszy niz na zdjeciach. Wroce tu na pewno! :-)
xxxabramowicz@xxxeria.pl, 04.04.2015

Zestawienie PA-Amps

Toontrack Superior Drummer 3 Upgrade Roland SH-01A gray Toontrack Superior Drummer 3 Varytec LED Theater Spot 100 3000K Digitech SDRUM Strummable Drums Boss Katana Mini Fender Standard Telecaster MN BB Kala Spruce Mahagony Sopran Ukulele Arturia KeyLab Essentials 61 Stairville Octagon 20x6W Tourpack 4 Darkglass Alpha Omicron Bass Distortion Arturia KeyLab Essentials 49
(4)
polecane
Toontrack Superior Drummer 3 Upgrade

Virtual Drum Production Studio (Download)Upgrade from Toontrack Superior Drummer 2 to Superior Drummer 3 Based on meticulously recorded samples of high quality drums, Recorded in 11.1 Surround by George Massenburg in the Galaxy Studios, Over 230GB...

przejdź do produktu
167 €
polecane
Roland SH-01A gray

Roland SH-01A gray, sounds of the classic roland sh-101 synthesizer via acb technology; new unison, chord, and four-voice polyphonic modes expand on the original's sound palette; built-in sequencer with 64 patterns; arpeggiator with 3 playback modes, note hold, 3-way transpose...

przejdź do produktu
399 €
polecane
Toontrack Superior Drummer 3

Toontrack Superior Drummer 3 (ESD); virtual drum production studio; extensively produced drum software, based on meticulously recorded samples of high end drums; recorded in 11.1 surround sound at the Galaxy Studios by George Massenburg; over 230 GB of raw, unprocessed...

przejdź do produktu
325 €
polecane
Varytec LED Theater Spot 100 3000K

LED Theatre Spotlights With Fresnel lens and 3000K colour temperature, Replaces conventional stepped lens spotlights of the 500 - 650 W class, Adjustable beam angle via manual zoom, Very quiet temperature-controlled fan for quiet operation, Light source: 100 W...

przejdź do produktu
329 €
polecane
Digitech SDRUM Strummable Drums

Digitech SDRUM Strummable Drums, drum machine in stomp box format, creates drum patterns based on scatches and strums across muted strings, 5 studio quality drumkit sounds, 12 different hats/rides styles, stores up to 36 differents songs, 3 song parts programmable...

przejdź do produktu
215 €
(1)
polecane
Boss Katana Mini

Modelling Combo Amplifier for Electric Guitar 3 Basic amplifier types selectable (Brown/Crunch/Clean), Analogue multi-stage gain circuit with 3-Band analogue EQ, Channels: 1, Power: 7 W, Equipped with: 1x 4" speaker, Cabinet construction: Closed, Controls: (Mono): Gain, Volume, Bass, Middle,...

przejdź do produktu
99 €
polecane
Fender Standard Telecaster MN BB

Electric Guitar Mexico, Alder body, Maple neck, Modern "C" neck profile, Fretboard: Maple, 21 Medium jumbo frets, Nut width: 42 mm, Scale: 648 mm (25.5"), Pickup: 2 Standard Tele Single Coil, 3-Way toggle switch, Volume knob and tone knob,...

przejdź do produktu
611 €
polecane
Kala Spruce Mahagony Sopran Ukulele

Kala Spruce Mahagony Soprano Ukulele, Soprano body size, 348 mm scale, overall length 533 mm, Spruce top, Mahogany back and sides, Mahogany neck, 12 nickel silver frets, Black Walnut fingerboard, Black Walnut bridge, chrome, geared machineheads, Aquila Super Nylgut strings,...

przejdź do produktu
77 €
polecane
Arturia KeyLab Essentials 61

USB MIDI Keyboard 61 Velocity-sensitive keys, 8 Velocity dynamic pads with aftertouch, A Clickable encoder, 9 Rotary control, 9 Faders, 13 Keys, Transport section with 4 function buttons, LCD display, Pitchbend and modulation wheel, Chord Play mode, Mackie /...

przejdź do produktu
249 €
polecane
Stairville Octagon 20x6W Tourpack 4

Stairville Octagon Theater 20x6W 4x Tourpack incl. Flightcase, 20x6W CW / WW / A, Complete Tourpack with 4 pieces Stairville Octagon Theater 20x6W in a stable roadcase. Professional LED Theatre Spot with infinitely adjustable colour temperature. The, Octagon Theatre is...

przejdź do produktu
949 €
polecane
Darkglass Alpha Omicron Bass Distortion

Effect Pedal for Electric Guitar Provides the distortion and flexibility of the alpha-omega in a smaller format, With the two distortions, it offers the same harmonically rich, various sounds as its big brother, Knobs: Blend - mod - level...

przejdź do produktu
266 €
polecane
Arturia KeyLab Essentials 49

USB MIDI Keyboard 49 Velocity-sensitive keys, 8 Velocity-sensitive pads with aftertouch, 1 clickable encoder, 9 Rotary control, 9 Faders, 13 Buttons, Transport section with 4 function buttons, LCD display, Pitchbend and modulation wheel, Chord Play mode, Mackie / HUI...

przejdź do produktu
199 €
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