When we started out doing the PHISON line, we had a goal to make no-compromise design based on our years of design experience of making high performance discrete amplifiers. The discrete design and component choice is the place where we differ from the rest.
All our gain stages used in our products are “single gain stage” technology which helps us making fast and stable gain stages. On top of that nonlinear distortion components in the amplifiers are minimized by the use of our “linearizer blocks”. We have to type of gain stages we incorporate that matched this criteria which is JFET folded cascade which we use in cases where Voltage feedback is needed and where source impedances are relatively high, and current feedback where.
To achieve the sound we have today our gain blocks have the right blend of Jfets and Bipolar devices. The right blend gives combined with “Single gain stage” and our “linearizer blocks” maximum transparency and pitch black background at any volume level not only in the midrange but also in the highs and bass range. Yet it is neutral
Not to pick to much electronic radiation that we are surrounded with, our amplifiers are limited in bandwidth to no more than 330KHz even when they are capable of twice the bandwidth. It is worth to mention that this limitation is not done inside the “gain stages” but on the outside not to mess up the performance.
Our second goal was to make a timeless unit, both in the interior as well in the exterior. The exterior has clean Scandinavian lines, the interior is module based, so that we always will be able to offer upgrade on the products over the years.
A2.120 preliminary information.
The A2.120 power amplifier is based on the same gain stages as PD2 preamplifier making the sound signature identical to the PD2 preamplifier.
We have choosen a classic linear supply for the power amplifier as we have tested different types of SMPS and every time we end up having worse bass performance from the amplifier even is the SMPS is rated 3 times the power of the linear power supply. It is not something that we need to listen extensively to hear, it is obvious right away for everyone that have heard the difference from SMPS and Linear classic powersupply.
We have chosen to have 7 pair’s output devices because we wanted no saturation when driving the amplifier in bridged mode. In bridged mode running as mono block this amplifier becomes a compact powerhouse having enough drive ability to drive the toughest loads.
Main features are:
- 2x120Watt into 8 Ohm load
- Bridgeable to 300Watt into 8Ohm load
- Powersupply : 1KVA
- Output current capability : 60Apeak
- Bandwidth: 1Hz – 330KHz
- Inputs: RCA and XLR
- Weight: 26Kg
- Size: 440x140x350mm
- 7 output transistor pairs per channel
- No global feedback loop.
- Frontend: JFET folded cascade
- Outputstage: Current feedback design