The only scenario which I think the Tact may not be enough is when you have very low effeciency speakers used in a very large room that you absolutely need more than what the Tact can provide. For everybody else, the search for the perfect dac/pre/amp is over, THIS IS IT!!! Berkeley RPM Mobile Mechanic

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It is a powered DAC in which the signal remains digital all the way until the point it exits to the speaker terminals. Nothing is lost, nothing is added. Whoever thinks that their dac/amp combinations is better has only that in their mind! Well, in the audio world, people believe what they want to believe, which is why there are people who buy $1000 digital interconnect (it's about as stupid as buying a $200 printer cable Baton Rouge Pro Mobile Mechanic

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Simple, solid, excellent support- truck oil change

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Steel Siding Services I like this!!!

Trusted and no issue!!!

Covers all frequencies well. Sounds good low or loud. Have a Wadia 23 and some Kef 105 ii. 606 pre attached. Have had this system for 10 years and still a very enjoyable listen. Clear, warm and non fatiguing.

Can’t think of any

It amplifies, looks gorgeous

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Purchased QUAD 606 to control Magneplanar loudspeakers - currently it's driving Kef Coda 8.2... Since I bought it, it has been mostly switched on has delivered ever since.

Similar Products Used:

Mission Cyrus 2 + PSX

heavy en solid contructed

litle bit slow and dull

Formerly Quad was an autority in the audioworld
now its only nostalgie and a lot of cheaper amps sounds better more lifelike.

Similar Products Used:

accuphase e11, denon

Same sound as 306. Not spectacular. Great Sound, Lots of Power.

Connectibility to HighPowered PreAmps. (Any Quad is okay)
B&W speakers are not advised.

Great Amplifier. Gives more body to ESL-63 than the 306. You forget that you own them. They provide you with Music. And for that matter also okay for Surround Sets (Together with a 306 for the back-speakers it is a RatPack)
Maybe not as trendy as other Amplifiers, but these Amp will stand for many years to come, just like the 306 and the 303.
(I have to modify my 405 still)
Bit tricky with B&W speakers: Small and Big ones don't give the stability that KEF seems to have with a QUAD combo.
I tried several B&W speakers and none was as good sounding as most KEF speakers. (Even the old 104/2!)
With the ESL-63 great combination for Classical & Jazz. Voices cannot get better.

Similar Products Used:

Quad 303/405(I)/306. Hafler. Sony (several), Revox, Tandberg

Simple, solid, excellent support

Not found yet

I was perfectly happy with my Power Amp (a self built amp from the Elektuur) until its temperature stability got out of control. I decided to look around for a good replacement with a solid company and service organization behind it.

I am one of those people whose dad already owned Quad equipment so I was tempted to buy one as well.

When I found my 606 for a good price I checked with the distributor for the Benelux. These people provide a superb service, they don't try to sell you the latest model but they gave me all the information I wanted and more than that. Thumbs up for Transtec in Rotterdam.

I then decided to buy it but I didn't expect the sound quality to be better than my old amp, I just though to have an similar quality amp but with less hassle.

Well was I wrong ! When I hooked it up to my Luxman pre-amp and my B&W speakers the whole set just came to life. Deep solid bass, crystal clear highs. The transparency that comes from this machine just took my whole set to a new level. Just when I thought I had to upgrade my speakers the 606 showed me that there's more in them than I knew.

Conclusion : Very good, worry-free, hi quality amplifier. Excellent distributor channel.

Similar Products Used:

Luxman integrated amps, The power Amp from Elektuur

Relaxed, open sound

I have a Quad 707. There is nothing wrong with this amplifier unless it is used with a Quad pre-amp like the 34, 44, or even the later pre-amps, as pre-amps do not seem to be Quads strong suit. Any comments below about limited bandwidth are probably due to the pre-amps used - the power amps are great!
I run it with Rogers LS3/5as and AB/1s with a passive pre-amp and Micromega CD.