I built my first QUAD405 in 1988.
From 1991 I started to improve this amazing design by addressing schematic, pcb layout and components.
The result is QUASAR, now at version 17.
Each component was carefully chosen not only by datasheet specifications, but also by extensive listening sessions.
We are proud to offer a current dumping amplifier completely redesigned, which offer superb sonic performance.
I'm confident, that by building this amplifier, you will rediscover and live your music again.
For current dumping related documents please see support section.
We are glad to build a Quasar amplifier for you, therefore we
invite you to listen Quasar 17 in our show-room.
In order to achieve best performance, we made customised amplifiers based on customer speaker system.
Please also visit our gallery and see what others say about Quasar.
Do It Yourself a QUASAR Ver 13
If you are a Do It Yourself hobbyist, and you would like to
your own QUASAR 13, we can provide all components to build Quasar 13 from
Top quality 70um Cu PCB's supporting DIP or SMD operational and lateral or vertical MOS-FET's.
PCB was designed in order to accomodate a large variety of components by different sizes and types.
Size of PCB is 200 x 86 mm.
For detailed PCB board dimensions look here -> board-size
We are providing, for your convenience, full BOM (Bill Of Materials) in
OpenOffice or Microsoft Office.
The documents contain links to Partsconnexion , Farnell and
Just click and add to your basket needed components.
We consider this is the fair way. You can buy high quality, genuine, components from major distributors at a right price.
After many listening hours and fine component tuning, we would like to suggest you an audiophile selection BOM, with components which offer best sonic performance at given price.
Below links refer to QUASAR ver.13 schematic and audiphile BOM.
OpenOffice audiophile BOM Quasar V13.ods
Audiophile BOM Quasar V13.xls
Audiophile BOM Google docs
For those who don´t want to spend so much money on audioplile
components, we provide a BOM with components listed by www.tme.eu
www.tme.eu BOM Quasar V13.xls
If you wish to build this amplifier with vertical MOSFET - Toshiba or International Rectifier - and with regular components, we recommend below schematic and BOM list.
Vertical MOSFET BOM will be added soon
Adobe document Schematic Quasar amp v13 Vertical MOSFET
Amplifier recommended internal wiring.
Please check regularly this page for updates.
Previous version of QUASAR and PCB.
QUASAR Ver 12
QUAD405 reborn modifications up to QUASAR (rar archive with large schematic)
QUASAR schematic ver.12 using Fairchild transistors FJP1943 & FJP5200
SMPS power supply version, featuring class A stage with Fairchild FJP1943 and best lateral MOSFET's from Magnatec as dumpers
For QUASAR amplifier modules or finished amplifier please use contact page.