Newsgroup: it.hobby.hi-fi
Titolo: Che ne pensate di questo finale di tipo PA

il finale è ad alta potenza, adatto ai luoghi aperti, il link è questo
http://www.behringer.com/EP2500/index.cfm?lang=ENG
secondo voi l'utilizzo di un toroidale e di una tecnologia di questo tipo 
porta ad elevate potenze a basso costo ma a quali svantaggi si vanno 
incontro?
Se andate sulle pagine del sito e scaricate il folder vi fanno vedere le 
caratteristiche e il finale aperto.
ditemi , che cosa ne pensate? io lo devo attaccare ad un basso elettrico da 
concerto
==== Caratteristiche =====================
  Oversized power supply
 Ultra-reliable, low-noise and highheadroom toroidal power transformer from 
the world's most acclaimed manufacturer TOROID®. You'll find this brand in 
the world's best and most expensive power amps. The shielded power 
transformer with a toroidal core is extremely quiet and much more musical 
than a switchmode power supply. It also has an incredible power reserve to 
assure that your amp delivers full and tight bass no matter how much you 
crank it up.
  Super-effective cooling system
 We've gone beyond deploying mere heat sinks-our road-proven " 
 back-to-front" ventilation system with an automatic speed-regulated fan 
guarantees uniform operating conditions. This assures reliable operation and 
a clean signal- regardless of the stress your amp is under. The bottom line: 
running a EUROPOWER amp with a 2-channel/2-Ohm load or a 4-Ohm load in 
mono-bridged mode for prolonged periods is no sweat.
  High-quality, highspeed TOSHIBA® and FAIRCHILD®  transistors
 Powerful and highly musical TOSHIBA® and FAIRCHILD® transistors are at the 
heart of each EUROPOWER amp. They are the industry standard, and are famous 
for their reliability and dependable operation.
  Double-sided PCBs that give you double the reliablity
 In cheap amps you'll find singlesided phenolic paper print circuit boards 
(PCBs) that not only break easily but also lack reliability, since the 
components are only soldered on one side. The solder joints easily break. 
Our double-sided fiberglass PCBs are made to military specs and provide 
ultra-reliable performance since all components are held by two solder 
joints. Years of trouble-free operation- regardless how much you use and 
abuse your amp.
  Selectable lowfrequency filters
 By reducing the infrasonic portion of the signal, bass reproduction is 
optimized and the amplifier can deliver all of its power to the musical 
portion of the frequency range. The filter is selectable for 30 Hz or 50 Hz 
cut-off frequencies- so you can decide what sounds best.
  Operating flexibility
 Three operating modes (2-channel, parallel or bridged mono) and operation 
into output loads down to 2 Ohms. Whatever you feed your amp, we've got you 
covered.
  A limiter that protects your sound
 Excessive input levels, even very brief peaks, can produce noticeable 
output distortion. To prevent this, each channel is equipped with a 
switchable limiter. The limiter automatically detects when a signal is about 
to clip and then reduces the gain to prevent distortion. It is fast and it 
only operates when gain reduction is needed-to preserve the dynamic 
characteristic of the input signal.
  Comprehensive connectivity for the real world
 Two types of balanced inputs (XLR and 1/4" TRS) and two types of outputs 
(professional SPEAKON® connectors and "touch-proof" binding posts) assure 
that your amp will keep up with your growing needs.
  Comprehensive connectivity for the real world
 Two types of balanced inputs (XLR and 1/4" TRS) and two types of outputs 
(professional SPEAKON® connectors and "touch-proof" binding posts) assure 
that your amp will keep up with your growing needs.
 Oversized power supply  Selectable lowfrequency filters
Ultra-reliable, low-noise and highheadroom toroidal power transformer from 
the world's most acclaimed manufacturer TOROID®. You'll find this brand in 
the world's best and most expensive power amps. The shielded power 
transformer with a toroidal core is extremely quiet and much more musical 
than a switchmode power supply. It also has an incredible power reserve to 
assure that your amp delivers full and tight bass no matter how much you 
crank it up.  By reducing the infrasonic portion of the signal, bass 
reproduction is optimized and the amplifier can deliver all of its power to 
the musical portion of the frequency range. The filter is selectable for 30 
Hz or 50 Hz cut-off frequencies- so you can decide what sounds best.
 Operating flexibility   High-quality, highspeed TOSHIBA® and FAIRCHILD® 
transistors
 Three operating modes (2-channel, parallel or bridged mono) and operation 
into output loads down to 2 Ohms. Whatever you feed your amp, we've got you 
covered.   Powerful and highly musical TOSHIBA® and FAIRCHILD® transistors 
are at the heart of each EUROPOWER amp. They are the industry standard, and 
are famous for their reliability and dependable operation.
 Double-sided PCBs that give you double the reliablity   Super-effective 
cooling system
 In cheap amps you'll find singlesided phenolic paper print circuit boards 
(PCBs) that not only break easily but also lack reliability, since the 
components are only soldered on one side. The solder joints easily break. 
Our double-sided fiberglass PCBs are made to military specs and provide 
ultra-reliable performance since all components are held by two solder 
joints. Years of trouble-free operation- regardless how much you use and 
abuse your amp.   We've gone beyond deploying mere heat sinks-our 
road-proven " back-to-front" ventilation system with an automatic 
speed-regulated fan guarantees uniform operating conditions. This assures 
reliable operation and a clean signal- regardless of the stress your amp is 
under. The bottom line: running a EUROPOWER amp with a 2-channel/2-Ohm load 
or a 4-Ohm load in mono-bridged mode for prolonged periods is no sweat.
 A limiter that protects your sound   Comprehensive connectivity for the 
real world
 Excessive input levels, even very brief peaks, can produce noticeable 
output distortion. To prevent this, each channel is equipped with a 
switchable limiter. The limiter automatically detects when a signal is about 
to clip and then reduces the gain to prevent distortion. It is fast and it 
only operates when gain reduction is needed-to preserve the dynamic 
characteristic of the input signal.   Two types of balanced inputs (XLR and 
1/4" TRS) and two types of outputs (professional SPEAKON® connectors and 
"touch-proof" binding posts) assure that your amp will keep up with your 
growing needs.
 


==============================
ti ringrazio per il consiglio, in effetti in rete ho sentito che questi 
finali ep2500 sono molto simili agli stessi della qscaudio (non so se 
conosci ma costano le 3volte).
1) I watt sono sempre pochi , purtroppo ho un batterista che mena come un 
fabbro, poi ho imparato che l'ampli è meglio farlo lavorare dal 30 al 60% 
della potenza, è questa la zona utile?
2) un amico ing. elettronico mi ha detto che questi "toroidali" sono molto 
affidabili, sono come dei muli, se non li sbatti per terra vanno sempre, e a 
livello elettrico l'ep2500 è semplificato al massimo (semplice ma efficace) 
che ne pensi?
ti ringrazio

 mm
=======================================
ti ringrazio ancora una volta, faro' un sistema
basso elettrico passivo->mixer (funzionante come preampli) + finale.
penso di essere a posto..ti ringrazio ancora!