UV101
11-12-2012, 21:44
Offered for sale is Quad 405 with full Net Audio upgrade package. I purchased this amp as an incomplete build and have built and further upgraded.
I'm not a business but I do constantly tinker and as such I turn over HiFi regularly and usually upgrade when I can in the process. I do leverage on my good DIY reputation (I use the same user name over on the diyaudio forum)
Listed on ebay here http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=221164792839
I'm happy to take offers here on the forum Looking for £260 plus postage which already takes into account evil bay fees that wont apply here. Ran this amp over the weekend from a TVC to check performance and this one is as impressive as the last one I did for a friend!
Any questions please ask :cool:
Hifisounds built quad 405
Net Audio amplifier modules and full dual mono power supply upgrade
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6981.jpg
Net Audio modified amplifier modules -Modifications include electrolytic and film capacitor replacement with high quality upgrades, adjustment to biasing, replacement zener voltage regulation with film bypass caps for opamp power supply. Net Audio opamp upgrade superceeded by HiFiSounds upgrade to the ultimate quality LME49710 High Performance, High Fidelity Audio Operational Amplifier. The input gain has also been adjusted in order to better suit the amplifier with any preamp.
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6988.jpg
Full dual mono power supply including utilisation of seperate secondary windings into seperate left and right channel bridge rectifiers and a massive increase of main smoothing reservoir capactitors from 20,000uF to 40,000uf (20,000uF left channel and 20,000uF right channel)
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6988.jpg
The output protection clamp circuit has also been upgraded with high quality capacitors and fitted direct to high quality gold plated conventional 4mm binding posts.
Input to the amplifier is now via high quality gold plated Phono (RCA) sockets mounted close to the amplifier modules to keep the coax as short as possible.
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6987.jpg
The amplifier has been fully rewired direct for 240v on the primary side of the transformer
All wiring is fixed to the main amp modules via origianl style spade connectors to retain the convenience for service but that have been soldered in order to prevent poor connection effecting performance. The performance of this amp is far superior to the original.
Don't wast your money on an unserviced original because it will need all of the caps replacing as a minimum!!! Check the condition of any original and the main PSU caps will be bulging on the top. Also the electrolytic caps on the amplifier modules along with a couple of key signal filter caps will have gone high ESR or out of spec causing high levels of hum and poor dynamic performance. All the common problems have been resolved here and this amp is ready to offer years of high performance!!!
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6984.jpg
Overall cosmetic condition is approx 8/10
There is wear to the corners and a couple of scratches to the side panels
and some marks on the back most noticeable around the speaker binding posts
Front panel heatsink and visible area when on a rack is more like 9.5/10
The condition is in keeping with age of the amplifier
3 month RTB defective part/workmanship guarantee (Ts&Cs apply)
Open to sensible offers!
Postage by insured courier!!!
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6985.jpg
The cost alone for the board upgrade service is £75
The cost of the power supply upgrade is £85
Sockets, cabling and opamps £25
Any questions please ask
Thanks for looking
EDIT.....also got a 1 owner from new quad 44 which has been serviced with one of the radio boards adjusted for CD (as per the quad service data) The only thing that lets is down is wear on the paint on the volume control. Comes with original box etc. Looking for similar money for this. Selling for a friend but I have the amp in my possession. PM me if you are interested:)
I'm not a business but I do constantly tinker and as such I turn over HiFi regularly and usually upgrade when I can in the process. I do leverage on my good DIY reputation (I use the same user name over on the diyaudio forum)
Listed on ebay here http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=221164792839
I'm happy to take offers here on the forum Looking for £260 plus postage which already takes into account evil bay fees that wont apply here. Ran this amp over the weekend from a TVC to check performance and this one is as impressive as the last one I did for a friend!
Any questions please ask :cool:
Hifisounds built quad 405
Net Audio amplifier modules and full dual mono power supply upgrade
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6981.jpg
Net Audio modified amplifier modules -Modifications include electrolytic and film capacitor replacement with high quality upgrades, adjustment to biasing, replacement zener voltage regulation with film bypass caps for opamp power supply. Net Audio opamp upgrade superceeded by HiFiSounds upgrade to the ultimate quality LME49710 High Performance, High Fidelity Audio Operational Amplifier. The input gain has also been adjusted in order to better suit the amplifier with any preamp.
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6988.jpg
Full dual mono power supply including utilisation of seperate secondary windings into seperate left and right channel bridge rectifiers and a massive increase of main smoothing reservoir capactitors from 20,000uF to 40,000uf (20,000uF left channel and 20,000uF right channel)
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6988.jpg
The output protection clamp circuit has also been upgraded with high quality capacitors and fitted direct to high quality gold plated conventional 4mm binding posts.
Input to the amplifier is now via high quality gold plated Phono (RCA) sockets mounted close to the amplifier modules to keep the coax as short as possible.
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6987.jpg
The amplifier has been fully rewired direct for 240v on the primary side of the transformer
All wiring is fixed to the main amp modules via origianl style spade connectors to retain the convenience for service but that have been soldered in order to prevent poor connection effecting performance. The performance of this amp is far superior to the original.
Don't wast your money on an unserviced original because it will need all of the caps replacing as a minimum!!! Check the condition of any original and the main PSU caps will be bulging on the top. Also the electrolytic caps on the amplifier modules along with a couple of key signal filter caps will have gone high ESR or out of spec causing high levels of hum and poor dynamic performance. All the common problems have been resolved here and this amp is ready to offer years of high performance!!!
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6984.jpg
Overall cosmetic condition is approx 8/10
There is wear to the corners and a couple of scratches to the side panels
and some marks on the back most noticeable around the speaker binding posts
Front panel heatsink and visible area when on a rack is more like 9.5/10
The condition is in keeping with age of the amplifier
3 month RTB defective part/workmanship guarantee (Ts&Cs apply)
Open to sensible offers!
Postage by insured courier!!!
http://i497.photobucket.com/albums/rr332/Trunky1812/Quad%2044%20405/IMG_6985.jpg
The cost alone for the board upgrade service is £75
The cost of the power supply upgrade is £85
Sockets, cabling and opamps £25
Any questions please ask
Thanks for looking
EDIT.....also got a 1 owner from new quad 44 which has been serviced with one of the radio boards adjusted for CD (as per the quad service data) The only thing that lets is down is wear on the paint on the volume control. Comes with original box etc. Looking for similar money for this. Selling for a friend but I have the amp in my possession. PM me if you are interested:)