Audio Research DS 450 amp......thoughts


....that's what I'm looking for, thoughts on this class D amp from this tube giant. Some people like like it.....what do YOU think if you have heard it
garebear
Palewin
A lot of reviewers get blended by the emperor's new cloths.
For example:
PS Audio HCA was one of the first class D amps that reached a class A rating at Stereophile.
http://www.stereophile.com/solidpoweramps/729/
The words was "tubelike" "revolutionary" the best of the best and had to be considered regardsless of price.
Today reality have catch up, and if you even can sell one of these amplifiers you will only get a few hundred dollars.
I used to own one, and soon discovered that it didn't sound very well, so it was removed from my home after 4 months.

I used to own a 150.2 too.
The reason for buying it was for driving a pair of Magnepan 3.5R in my TV system, and the only reason for selecting 150.2 was for the posibility to keep it on permanently without the power consumption and because I really like ARC as a company.
It was paired with ARC LS12 as a linestage (lovelly sound from this little linestage).
I soon replaced the 150.2 with a Restek Tensor and the improvment was enormous.
The soundstage quadrupled in size and suddenly all complex acoustic instruments was rendered with full size and sounded as the real music event.
So sorry if I recommend that you try a different power amp that isn't a class D amp.

Sorry for Tom Martins decision to select 300.2 unless he use it for bass only as I do with my 300.2
...and of course I have tried my 300.2 for full range operation.
Does it sound good and cast a high-end soundstage?
I'm sorry but it doesn't.
It's dynamic and sound powerful, but it can't let the music through in a unharmed way.

From my point of view switching technology is best kept for powersupply service and leave the amplifing circiutry to traditional amplifing technology.
Two companies that have come to the same conclusion are Linn and Halcro.
Both have got some nice reviews from the press too.

But I expect class D technology to keep getting better and better and eventually it can compete with traditional amplifiers.
I will keep listening to them.
This is what I have found until today...

Do you remember the seventies when tube amplification almost died out because of the new revolutionary transistor technology ?
Today we know better...

I don't think we will see a similar evolution with class D amplifiers, but be aware of the problems with the basic technology that class D amplifiers are built on.
The industry will eventually solve them, but from my point of view it will take some years from now.
Palewin

Regarding the "T" class that ARC state it depends on the fact that it is a variation of class D amlifier with a variable switching frequency, but make no mistake, it's still composed of a comparator that compare a triangular wave with the signal and produce a PWM signal to drive the switching output transistors.
Just to vary the triangular wave switching frequency according to the demand of power will not make it a none class D amplifier.

There are some other versions of switching amplifier technologies (E/F/G/H), and there have been some examples of class G and H in the market. Usually for our portable audio devices.
E and F is for high frequencies and not suitable for audio.

Please read more here if you want:
http://en.wikipedia.org/wiki/Electronic_amplifier
There is one instrument that can disprove all the theory's in the world,and that is the Human Ear!
I bought my Ds 450 8 months ago along with LS 27 to drive Sophia III speakers. At 1st the 450 left me wanting, but after the longest burn-in necessary in my experience, 600+ hrs. the 450 allowed all of great sound from the LS 27 to flow through and I am now very satisfied from various aspects.
I had a chance to compare the Class D Audio Research integrated VS. Ayre V5xe with matching pre amp through Maggie 3.7s. The Ayre had noticably greater soundstaging and detail resolution.
The ARC had a wetter, less dry sound with more tonal density and better bass extension on the Maggies.