The Symphony Power Amplifier

The Symphony is a 200W stereo power amplifier with an integral power supply. Like the Bravo, the Symphony power supply also uses an Inductor Input System. This avoids the high peak current demands that would be placed on the mains supply by a conventional power supply design and therefore minimises inter-modulation distortion on the power supply “rails” and ground returns. It is also relatively unaffected by power supply voltage variations compared to conventional designs. An additional benefit of this technique is that it reduces the stress on the key power supply components, leading to higher reliability and longer life.

Viola amplifiers are designed to ensure highly controlled behaviour under all conditions of use. Particular care has been paid to the overload conditions that are often encountered under normal use. Soft clipping circuitry is used to limit sonic degradation if the amplifier is overdriven (voltage overload). Bandwidth control results in nearly identical small signal and large signal frequency responses. This approach avoids slew rate limiting (frequency overload). In order to ensure accuracy in the time domain, the bandwidth control has a flat group delay characteristic. This implies a linear phase verses frequency relationship and means that all signals pass through the amplifier with the same amount of delay. In plain English the output signal looks exactly like the input signal, only bigger.

Great efforts have been made to minimise distortion at lower frequencies, because the majority of energy is encountered at these frequencies in most music. Obtaining low distortion without the use of large amounts of corrective feedback requires the use of more output devices and more refined lower level stages.

Brief Specifications:

Output Power:

250W per channel into 8Ω

500W per channel into 4Ω

Inputs: 1 x Balanced, 1 x Fischer

Outputs: 2 pairs of WBT terminals per channel

Frequency Response:

20Hz to 20kHz ± 0.15dB

10Hz to 100kHz, -3dB

Power Bandwidth: 5Hz to 100kHz

THD: Less than 0.1% @ 20kHz and 200W

SN Ratio -105dB @ 1kHz 200W, C weighted

Dimensions:

Amplifier: 44.7cm W x 44.7cm H x 19.6cm D

Weight:

Amplifier: 53 kg

For more information, visit the Viola Labs website at www.violalabs.com 

For pricing and queries contact Aeolian at (011) 487 2254