This item has been sold
Item Category:	Power Amplifiers
Make:	Viola Labs
Model:	Bravo
Age:	5 years 0 months
Condition (?):	9/10
Voltage:	230V 50Hz
Price New (if known):	£ 50000
Choice Hi-fi price:	£ 19990
Conditions of payment:	Or nearest offer
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Image ( actual ) : click on the image to view original size

Additional Details:

The signal path in the Bravo is fully balanced throughout the voltage
> gain stages. This is essential to achieve the maximum immunity from
> external sources of noise. Soft clipping circuitry limits sonic
> degradation should the amplifier be overdriven. Bandwidth control
> results in nearly identical small signal and large signal frequency
> responses and avoids slew rate limiting. To ensure accuracy in the
> time domain, the bandwidth control has a flat group delay
> characteristic. Great efforts have been made to minimize distortion at
> lower frequencies, because the majority of energy is encountered at
> these frequencies in most music. To improve transparency and the
> resolution of low level signals, the output stage operates with a
> relatively high quiescent current. Heavy oxygen free copper bus bars
> enhance the efficiency of power distribution within the amplifier.
> Film capacitors are used on the individual circuit boards in the unit
> to provide the high frequency bypass for the power supply and ensure
> that all sections of the amplifier see a uniformly low power supply
> impedance. This is key to the Bravo’s ability to deliver massive amounts
of power while preserving all the subtle aspects of the music signal.
> Bravo Power Supply
>
> The heart of a power amplifier is its power supply. The Bravo uses a
> choke input filter type power supply with a generously rated 2kVA
> mains transformer. Four 80,000 μF filter capacitors are located in the
> power amplifier chassis, providing optimum decoupling for the audio power
stages.
>
> The Bravo’s power supply design completely avoids the generation of
> the high frequency noise that occurs with switch mode power supplies.
> It also places less stress on the power supply components, leading to
> higher reliability and longer life. An additional benefit is that high
> peak ripple currents are virtually eliminated, minimizing
> intermodulation distortion on the power supply rails and ground
> returns. This enhances sound quality by reducing noise and distortion
levels.
> Bravo Power Amplifier Specifications
> Output Power Stereo Mode:
> 350W per channel into 8 ohms
> 700W per channel into 4 ohms
>
> Half-Bridge Parallel Mode:
> 1,000W into 4 ohms
> 1,200W into 2 ohms
> 1,600W into 1 ohm
>
> Full Bridge Mode:
> 1,200W into 8 ohms
> 1,600W into 4 ohms
> All power figures quoted are continuous average power Inputs 2 x XLR
> 2 x Fischer
> Input Impedance 1M ohm
> Frequency Response 10Hz to 20kHz ± 0.15dB 10Hz to 100kHz, -3dB Power
> Bandwidth 5Hz to 100kHz THD Less than 0.1% @ 20kHz and 350W SN Ratio
> -105dB @ 1kHz 350W, C weighted Dimensions Amplifier: 44.7cm W x
> 23.5cm H x 66cm D
> PSU: 44.7cm W x 23.5cm H x 66cm D
> Weights Amplifier: 39 kg
> PSU: 57kg
>
> My units are 5 five years old and are in a perfect shape. Originally
> 230 volts. One owner, me. I am a private passionate hifi lover and you?
> An equal exchange?

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