You are here
The Sonata uses a 4.3’’ TFT color touchscreen display for navigation along with a high quality optical encoder using a magnetic indexing mechanism for volume and balance control.
Design & Function
The Sonata chassis design follows the classic design of the Cadenza preamplifier. The Sonata uses a 4.3’’ TFT color touchscreen display for navigation along with a high quality optical encoder using a magnetic indexing mechanism for volume and balance control. The Sonata can be controlled by using the Viola Remote Apple iOS™ application or RS-232. The Sonata preamplifier has a +12V trigger output to remotely control power amplifiers. Viola Link bus connectors also provide control of the external Sonata power supply and Viola Concerto power amplifiers. USB master ports are provided for firmware updates.
The Sonata preamplifier uses a separate regulated power supply. Separate regulated supply sections are used for analog circuitry and digital control functions. The main analog power supplies use a choke input design followed by a dual tracking discrete regulator. Printed circuit board mounted low ESR capacitors are used for supply filtering.
The Sonata is based on the topology of the Crescendo preamplifier. The Sonata uses the OPA-1 discrete low noise, high speed operational amplifier module. The OPA-1 high current output stage will drive high capacitance cables and power amplifier input stages. The Sonata volume and balance control uses discrete high precision resistors. An additional dual tracking regulator is used for local power supply regulation.
Sonata Preamplifier Specifications
|Inputs: Analog||3 XLR Balanced
3 RCA Unbalanced
|Inputs: Digital||Optional DAC Card – under development
1 USB audio
|Outputs||1 RCA Unbalanced
1 Fixed (Tape)
|Input Impedance||1 Million Ohms (Single Ended)
40k Ohms (Balanced)
|Output Impedance||Main Output 100 Ohms
Tape Output 600 Ohms
|Maximum Gain||20dB (Balance @ 0dB)|
|Maximum Output||14.6Vrms Balanced
7.3Vrms Single Ended
|Frequency Response||20Hz to 20 kHz ± 0.2dB|
|IMD (SMPTE)||Less than 0.005% @ 1V Output|
|THD||Less than 0.01% @ 20 kHz 1V Output|
|Noise||> -90dBv 10Hz – 22 kHz|
|Power Consumption||Approximately 35W|
|Weight||Preamplifier 18lbs (8.2kg), Supply 24lbs (10.9kg)|
|Dimensions||Preamplifier, Power Supply Each
17.5 ‘’ W x 3.5’’H x 15 ‘’ D (44.5cm W x 8.9cm H x 38.1cm D)