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Quad 405, R31 overheating | diyAudio
Quad 405, R31 overheating | diyAudio

Class A dynamic biasing 80W amplifier PCB Quad 405 2pcs | eBay
Class A dynamic biasing 80W amplifier PCB Quad 405 2pcs | eBay

Quad 405 PCB with matched pre-drilled T-shape heatsink one channel | eBay
Quad 405 PCB with matched pre-drilled T-shape heatsink one channel | eBay

Quad 405-2 upgrades
Quad 405-2 upgrades

Quad 405-2 Power Amplifier Restoration | LiQUiD AUDiO
Quad 405-2 Power Amplifier Restoration | LiQUiD AUDiO

Quad 405 - This is a board from an amplifier I recently repaired. As you  can see it has had a rather dodgy repair at some time in the past. I can't
Quad 405 - This is a board from an amplifier I recently repaired. As you can see it has had a rather dodgy repair at some time in the past. I can't

200 Watt Amplifier Based on Quad 405 - Sponsor - PCBWay
200 Watt Amplifier Based on Quad 405 - Sponsor - PCBWay

Upgrading a Quad 405-2 | The WAM
Upgrading a Quad 405-2 | The WAM

QUAD Hi Fi Mods Gallery ~
QUAD Hi Fi Mods Gallery ~

QUAD 405 amplifier board need to fix. | Amplifier, Hifi, Quad
QUAD 405 amplifier board need to fix. | Amplifier, Hifi, Quad

Another Quad 405 clone board to build & test. - YouTube
Another Quad 405 clone board to build & test. - YouTube

Quad 405 / 405-2 Power Amplifier Review - Understated Elegance
Quad 405 / 405-2 Power Amplifier Review - Understated Elegance

Quad 405 Mk1 replacement PCB's | diyAudio
Quad 405 Mk1 replacement PCB's | diyAudio

Freie Ton- und Bildwerkstatt: Quad 405 Revision en
Freie Ton- und Bildwerkstatt: Quad 405 Revision en

Quad Refurbishing
Quad Refurbishing

Quad 405 / 405-2 Power Amplifier Review - Understated Elegance
Quad 405 / 405-2 Power Amplifier Review - Understated Elegance

Quad Refurbishing
Quad Refurbishing

Quad
Quad

Quad Spot: Quad 405 DIY illustrated guidelines - Step 4 to 6
Quad Spot: Quad 405 DIY illustrated guidelines - Step 4 to 6

Quad 405 Upgrade and Revision Kit - DADA Electronics
Quad 405 Upgrade and Revision Kit - DADA Electronics

Quad Spot: Chinese Quad 405 boards
Quad Spot: Chinese Quad 405 boards

Fully specced Net Audio Quad 405-3 in exceptional condition
Fully specced Net Audio Quad 405-3 in exceptional condition

Higly sought Class A dynamic biasing 80W amplifier PCB Quad 405 MK2 1pc ! |  eBay
Higly sought Class A dynamic biasing 80W amplifier PCB Quad 405 MK2 1pc ! | eBay