Quad 405 Amplifiers

4.65/5 (17 Reviews) MSRP : $685.00


Product Description

100 Watt Power Amplifier (1973-1977)


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Reviews 1 - 5 (17 Reviews Total) | Next 15

User Reviews

Overall Rating:5
Value Rating:5
Submitted by thokas a Audio Enthusiast

Date Reviewed: September 5, 2005

Bottom Line:   
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, 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.

I've digitized all my music (lossless of course), and use a Phase 24FW as an AD converter. It might not be the best there is - but again, at a price around USD 300 it sure beats CD players costing 3 times as much.

The Quad 405 run a pair of Magnerplaner 0.6 loudspeakers. These speakers are on the "bright side", and controlling the impedance, the bass and the treble has been a task none of my other amps have been able to fullfil.

So to sum it up. If you're familiar with eletronics and soldering, and you want a clear and powerfull sound, you can get your self a Hi-Fi system with the Quad 405 that sounds like a system worth USD 1.500 to 2.000 - now that's a bargain...

PS: And did I mention the design? You don't see products with this classic "vintage" design and small footprint anymore. Your wife/girl friend will love it!...

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Used product for:   1 to 3 months

Duration Product Used:   Audio Enthusiast

Product model year:   Pre 1995

Price Paid:    $110.00

Purchased At:   Used



Overall Rating:5
Value Rating:4
Submitted by JustMe a AudioPhile

Date Reviewed: December 25, 2004

Bottom Line:   
This unassuming little amp certainly sounds like a 200+w/ch amp. It also happens to be more transparent than one woould expect. It drives my Royd Sintra II's without causing listening fatigue as many amps seem to.

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Used product for:   More than 1 year

Duration Product Used:   AudioPhile

Product model year:   Pre 1995

Price Paid:    $300.00

Purchased At:   Disc N' Dat, Windsor



Overall Rating:4
Value Rating:3
Submitted by kb0000 a AudioPhile

Date Reviewed: May 26, 2004

Bottom Line:   
A good competant amp, but there are better.
Quad says the ESL 63 speaker was desigted for this amp. Again, it pairs OK, but there are better.
All the amps listed later except the Marantz sound better.

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Used product for:   More than 1 year

Duration Product Used:   AudioPhile

Product model year:   Pre 1995

Price Paid:    $125.00

Purchased At:   used



Overall Rating:4
Value Rating:4
Submitted by jwsb a AudioPhile

Date Reviewed: January 26, 2004

Bottom Line:   
Got this hooked first to a Metaxas MAS Marquis, Then a NAD 3020 (Used as a pre)Then finally a Le Tube. One of the best SS Amps for the price. Anyone should get one if the price is right say somewhere below $300 in good condition. The most Neutral sounding amp I've ever tried. The QUAD revealed all the distinct qualities of the above mentioned preamps. In comparison to Adcom 525 - Adcom sounds a bit dark but has more uumph in the lower bass frequencies. In comparison to Hafler DH220 - Hafler sounds a bit veiled and restricted (a tube wannabe without the advantages of SS) Prefer the Adcom to Hafler. Would say Quad is the best among the three although aging. You wanna hear your preamp? The Quad is the best way to go. Your want more sound stage and delicate, airy highs and mids? Get a tube Amp. 40wpc on Tubes sound Like the equivalent of 100wpc that the Quad dishes out. But consider how cheap this amp is going for.

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Used product for:   1 to 3 months

Duration Product Used:   AudioPhile

Product model year:   Pre 1995



Overall Rating:4
Value Rating:4
Submitted by teradacto a AudioPhile

Date Reviewed: June 15, 2003

Bottom Line:   
I traded a $10 Kenwood KR 2600 receiver that I bought at a swap meet , & an old cream seperator that I found in a scrap pile, for the SP-3500's.They pound out the tunes very well! I have them hooked up with a pair of ?? Dynaco A25 clones, that I also paid $10 Canadian for at Value Village. Good combo of speakers.

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Used product for:   Less than 1 month

Duration Product Used:   AudioPhile

Product model year:   Pre 1995

Price Paid:    $10.00

Purchased At:   yard sale




Reviews 1 - 5 (17 Reviews Total) | Next 15

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Quad 405-3 power amplifier weird noises

Hi and thanks for reading this post. Not sure why but my quad 405-3 is making weird noises. When switched on it works ok for the first five minutes then it makes a loud crackling noise for a second, a minute later it crackles again and this is loud, i had the volume low but it nearly blew m ... Read More »

Quad 405 -- upgrade options??

I just unpacked an old quad 405 that I haven't used for a couple years. I really like the sound. I'm using with a pair of Paradigm mini monitors and an old Paragon system E tube preamp. Although the amp is working fine, I've read many companies online offering "renew/refurb" kits and services tha ... Read More »

Quad 405-2 Modifications

Does anybody have experience or knowledge of the best available modifications for the Quad 405-2 amplifier? There are several companies offering mods, such as replacing the power caps, op amps and generally bringing the design up to date. I like the Quad very much and it drives my Audio Vector M ... Read More »

Quad 405 Mods/problem

Hi guys I have a lovely old Quad 405/405 Mrk 2 amps which I had biamped with an Audiolab 8000C I wanted to upgrade so bought 2 of their upgrade kits containing capcitors and new opamps, etc, the Quad 405/2 works like a dream, although not technically minded, if shown where and how to solder and r ... Read More »

Quad 405-2 in combitation with matrix 802-s3

I'm considering to upgrade my current set which contains of: Quad 44 Quad 405-2 kenwood dp7090 combined with B&W 804 serie 2 i do have the offer for B&W 802 serie 3 speakers. the question is or my amplifier is powerfull enough with them? pennep,Read More »

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