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Net Audio Modified Quad 405-2 Amplifier - Hi-Fi-Insight
http://www.hi-fi-insight.com/net-audio-modified-quad-405-2-amplifier.html
Net Audio Modified Quad 405-2 Amplifier. Having recently accquired an second hand Quad 405-2 on Ebay, we were interested to see what improvements could be made to what already sounded fairly impressive. Having already upgraded our 405 with heavy duty loudspeaker binding posts, teflon insulated phono sockets, and replaced the internal wiring ...
Quad 405 / 405-2 Power Amplifier Review - LiQUiD AUDiO
https://liquidaudio.com.au/quad-405-power-amplifier-review/
The Quad 405 and 405-2 are compact, measuring just 115 x 340.5 x 195mm. At 9kg, this is a small, dense amplifier, heavy for its size. The 405 is able to deliver 100 watts per channel, more than enough to drive most speakers.
Fs - quad 405-2 fully net audio modded!!!
https://theartofsound.net/forum/showthread.php?55893-Fs-quad-405-2-fully-net-audio-modded!!!
Fs - quad 405-2 fully net audio modded!!! This is my Quad 405-2 which is fully modded to latest NET Audio mk 3 boards and PSU. I had Nick Gorham mod this amp with on/off switch and a new set of RCA inputs. There is a slight hum at very high levels to the left channel but nothing that can be heard a normal listening levels.
Quad 405-2 upgraded to Net Audio Mk 3. - DIY - HiFi WigWam
https://www.hifiwigwam.com/forum/topic/35380-quad-405-2-upgraded-to-net-audio-mk-3/
Quad 405-2 upgraded to Net Audio Mk 3. For the first time in three years I am playing with alternative amplification. Space is the primary driver, I am looking for a compact solution with no performance compromises over my present setup. After purchasing a 405-2, completely original bar the removal of the current limiting by Quad, I decided to ...
QUAD 405-2 Amplifier Modification and Information
http://www.keith-snook.info/QUAD-405-2-Modification.html
The QUAD 405–2 pictured above has its speaker connectors better located than the earlier 405 ~ It also has gold plated phono connectors for the signal inputs which are isolated from chassis and an IEC mains input/output loop through ~ Although more practical none of these features were added to make it sound any better than any other 405 with the additional D13 and good …
Quad 405 Amplifiers user reviews : 4.9 out of 5 - 19 ...
http://www.audioreview.com/product/amplification/amplifiers/quad/405.html
Yes, of course you can get better amps than this! But at a price around USD 100 it is a "killer bargain"! However, don't be satisfied with the original 405-1 or 405-2 there are upgrade kits out there, that will lift the sound of these small gems to new hights. I've upgraded my 405-1 with new parts and a new dual mono power supply from Net Audio ...
Net Audio - Fidele
https://fidele.co.uk/NetAudio/public_html/
We offer service and repair for any Net Audio or Fidele Audio upgrades as well as offering new Quad upgrades and upgrade parts. We can repair any Quad 33, 34, 44, 303, 405, 306, 606 etc. Below you will find a range of Quad amplifer upgrades based on Net Audio designs and specifications. We offer upgrades and parts for the following amplifers.
Net Audio Quad 405-3 Amplifier Update - hi-fi-insight.com
http://www.hi-fi-insight.com/net-audio-quad-405-3-amplifier-update.html
Net Audio Quad 405-3 Amplifier Update. to greatly surpass the sound quality of the original Quad 405 and 405-2. The op-amp used in these new boards as standard is an Analog Devices AD843 which at around £8-10 per chip is a very high quality, low noise/distortion option.
405 Qw 13 - de Smith
https://desmith.net/NMdS/Shack/Bernd%20Ludwig%20405%20Modifications%20V13.pdf
The 'QUAD 405' was in production from 1976 to 1993. About 160.000 copies were built. There were several minor changes in the circuitry during these nearly 20 years. At SN 59000 a major revision took place, and in 1981, at SN 65000, a refined protection-circuit gave opportunity to rename the amp to 'QUAD 405-2' (see
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