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Quad 405 power amplifier | Stereophile.com
https://www.stereophile.com/solidpoweramps/655/index.html
Quad 405 power amplifier. This is something we don't see too often: an entirely new approach to power amplifier design. As Quad points out in its …
Quad 405 Amplifiers user reviews : 4.9 out of 5 - 19 ...
http://www.audioreview.com/product/amplification/amplifiers/quad/405.html
I've upgraded my 405-1 with new parts and a new dual mono power supply from Net Audio, UK. Just to upgrade the OP AMPs (two IC's that will cost you around USD 8) makes a world of difference. And the DMPSU gave so much more perspective and power in the lower bass.
Quad 405 / 405-2 Power Amplifier Review - LiQUiD AUDiO
https://liquidaudio.com.au/quad-405-power-amplifier-review/
The QUAD 405 Current Dumping Amplifier | Hifi Pig
https://hifipig.com/the-quad-405-current-dumping-amplifier/
Interestingly, the 405 inverts the signal fed through it, relying on a Quad pre-amplifier which reverses the signal so that audio going through that op-amp is 180 degrees out. Therefore, if you don’t have a Quad preamplifier to reverse the signal into the 405 perhaps you should try swapping the negative and positive of both speaker terminals ...
Quad 405 Vintage Power Amplifier | Vintage Hifi
https://www.vintageshifi.com/Quad-405.php
Quad 405 vintage power amplifier. Power (RMS) 2x100w/8 ohms. The manual is free to download as well as the equivalence of its transistors.
Quad 405 Power Amplifier | Soundcentre | Reverb
https://reverb.com/item/50498401-quad-405-power-amplifier
Quad 405 power amplifier. This is in good condition although it has some marks on the outer casing as seen in the pictures. It is in good working order and has recently been re-capped and the inputs converted to RCA phono to make it more versatile. It …
Quad 405 Power Amplifier - Vintage & Pre-Owned Audio and HiFi
https://www.vintagechief.com/quad-405-power-amplifier-20782
Specifications. Specifications Quad 405 power amplifier: - Power output: 100 watts per channel into 8 (stereo) - Frequency response: 20Hz to 20kHz. - Total harmonic distortion: 0.05%. - Input sensitivity: 0.5V. - Signal to noise ratio: 95dB. - Speaker load impedance: 4 to 16.
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