Dada Electronics wants to buy your old Quad boards.
If you have a special configuration of input-modules or if you want OPA627 output-chips send an e-mail to firstname.lastname@example.org.
Dada now offers a full range of upgrade-kits, High-end boards and revision services for all transistor Quad amplifiers from the 33 to the 606.
If you have a Quad 44 and you want to have an idea about the upgrade / revision, send an e-mail and we'll reply with the Quad 44 Upgrade-manual.
You can download the upgrade/revision manual from our website for free, see www.dadaelectronics.eu/downloads. The kit is available in the Webshop on our site.