Class D Technology

Devialet, hah, if you enjoy overpaying by %900 for a basic low level all in one which sounds no better than a Best Buy receiver at 300$, go ahead.  

Local stereo shop has these, they are seriously nothing special, I have heard them with those big$$ Cremona speakers, Martin Logan ES speakers, sure the Martin logans go a little louder due to more watts, but those watts are poor.   

I must have spent 4-5 hrs in the shop that day as I bought a new CD player, and listened to every room they had. McIntosh monos' , devialet, NAD, A pair of tube amps by McIntosh that were restored by the owner, and 3-4 other amps, several speakers, etc etc.  I was not impressed, but my son was, who fell asleep listening to Pink Floyd through the McIntosh/Cremona combo.   

If you need small footprint, and are financially stable, go ahead buy them, you will be fine, but there is WAY better for far less, and goosebumps do come with other brands free of charge. 

Just my worthless two cents. 

-MY humble opinion-




i don't want to come off as a di*k, I'm not, this is only my opinion of my listening experience, if you like them, buy them. 
I would personally go with another Sunfire Signature 600, send to bill flannerys for a update/overhaul, and be happy for 15+ years. 

how did such an uninformed person get an article into the EE Times?

Regarding the EE Times article, I took a look at some of the many patents that were issued to what was then the author’s company, JAM Technologies. It appears that most or all of their amplifier designs were intended for applications in which the amplification circuitry is provided with digital inputs, and operates exclusively in the digital domain until low pass filtering is applied to the pulse width modulated signal at the amplifier’s output.

Given that, the references in the article to jitter and to quantized output levels seem understandable, but along with the rest of the article would seem to have little if any relevance to class D amplifiers that are driven with analog inputs.

Also, JAM Technologies was described as a fabless semiconductor company (the word "fables" appearing at the end of the article is an obvious error or typo). Their designs appear to have been mainly intended for flat panel TV, PC audio, and personal media player applications, not for higher powered audiophile-oriented applications.

Some additional background I found that may be of interest: The company was founded in 1998 or 1999, and no longer exists. The author of the article was a co-founder of the company, together with another gentleman who was its chief technology officer and the inventor named in most or all of its patents. Both gentlemen left the company within a year or two after the article was published in 2005, and their subsequent professional endeavors have been unrelated to audio or consumer electronics.

Regards,
-- Al

@arafiq
I've had 3 different Peachtree amps (NovaAmp220, Nova 125SE, and Grand Integrated X-1), as well as a Parasound (older HCA-2003 model).  The Peachtree amps (with my gear, in my room) all absolutely sounded better than the Parasound.  Granted, the A23 is a much newer amp, so I might have favored that one over the Peachtrees, who knows?

@spenrock
I agree with your assessment of the Peachtree gear.  Their stuff is a great value for what you get.  They "punch above their weight class" you could say.  I have Peachtree integrateds in two rooms of my house with nothing but a Sonos and Altec Lansing speakers connected to each of them, and I'm not wanting more for these rooms.  That said, if you want to spend more, you can certainly get better sound.   These aren't reference systems.

I currently have the Nord One Up (Hypex NC500 based) monoblocks in my big system.  These have replaced the Peachtree Amp220 and immediately sounded more transparent and dynamic.  The new generation of Hypex class D amps are the real deal.  These amps use the same Hypex amplifier boards and power supply module that the Bel Canto 600m amps use, and they are a great fit in my system.  So far, these are the best of all amps I've used (10s, but not 100s).  FWIW I am using a tube pre (PS Audio BHK Pre), power regenerator (PS Audio P10), and large, low impedance speakers (Martin Logan Aeon i), all of which seem to lend themselves well to class D.  I'm very happy with the set up.

I owned the Devialet and it sounded very good, however, the Lyngdorf TA2170 with room correction is MUCH better and a very special piece. Check it out folks as it replaced over $15,000 in separates and sounds better.