More Power!

In this blog, I often focus on products that are at home in a home theater, but when a press release about the new Perreaux éloquence 250i reached my inbox, I was intrigued. It claims to be the world's most powerful Class AB stereo integrated amp, so I had to investigate further.

As it's model number implies, the 250i is rated to deliver 250 watts/channel into 8Ω. But wait a minute—the Perreaux website says it can output up to 360Wpc into 8Ω. In reply to my query about this discrepancy, a representative from the New Zealand-based company explained that 250Wpc is a very conservative rating per Perreaux's standard operating procedure, but the amp can actually deliver 360Wpc continuously into 8Ω just before clipping while remaining within the THD (total harmonic distortion) spec of 0.002% at 1kHz or 0.010% from 20Hz to 20kHz. Of course, the power into 4Ω is even more impressive—500Wpc rated, 530Wpc max continuous, though the THD is not specified in this case.

The amp's other specs are equally remarkable. For example, the frequency response from 20Hz to 20kHz deviates from flat by no more than –0.15dB, and the response from 5Hz to 60kHz deviates by no more than –0.50dB. That's ruler-flat by most standards.

How does the amp achieve such exemplary performance? Three separate transformers feed four independent power supplies, which in turn drive high-power MOSFET output transistors. The whole shebang is controlled and protected from overloading and overheating by an advanced microprocessor that is isolated from the audio signal path.

Of course, this is an integrated amp, which means it includes a preamp section with inputs for your stereo sources. It provides one pair of balanced XLR connectors and four pairs of unbalanced RCA connectors as well as an iPod input on the front panel. The 250i also offers a pass-through mode that lets it act as a straightforward 2-channel power amp in a home-theater setup when it's not being used for music listening—a nice touch.

Optional features include a digital-to-analog converter module with two optical and two coax inputs that can accept up to 24-bit/192kHz signals as well as one USB port that can handle up to 16-bit/48kHz. Another option is a phono module for moving-magnet or moving-coil photo cartridges.

You'd think that the world's most powerful anything would be expensive, and you'd be right. List price for the basic 250i will be $8500 in the United States when it ships in a month or two; the DAC module will be around $1500, and the phono module will be around $1000. That's a lot to pay for a 2-channel integrated amp, but from what I've heard of Perreaux products, it'll be money well spent.

Share | |
Jerry's picture

I was thinking about the day when I'm going to want a separate two channel system just for music, and use my multi channel system for home theater and SACD multi channel. This of course would be the perfect arrangement if I were financially equipped to do so, but as of now, I'm not. The question is, do I really need it? Can I take the Swiss Army Knife approach and meet all my high-end audiophile needs and get superb sound? Or, to achieve that final 1% (just a random number of course, it's probably higher) of transparency, do I need a separate two channel set up, with an integrated amp like this one?

Scott Wilkinson's picture

Ah, the perennial question. I'm afraid each of us must answer it for ourself. Personally, I'm fine with a single system, but I don't consider myself to be a true audiophile. I recognize and appreciate high-quality sound, of course

Jim's picture

Claims! Well isnt the Gryphon Diablo also rated at 250 watts at 8 ohms and 500 watts at 4 ohms. And somehow I have a feeling it is far better than the Perreaux. Regards Jim

Clinton Jensen (Perreaux Technical Director)'s picture

Hi Jim We are obviously very aware of the Gryphon Diablo, and there is no denying that it is a very formidable piece of audio gear. Yes, the éloquence 250i is similarly rated, but it's what's hidden behind all the specs and figures that differentiates it. According to this Australian Hi-Fi review ( on the Gryphon website, the test results show the maximum output of the Diablo before clipping as 289W into 8 Ohms and 503W into 4 Ohms. Our claim is qualified as follows, the 250i outputs 360W into 8 Ohms and 530W into 4 Ohms before clipping (i.e. THD+N <0.004% @ 1kHz). Of course this is all still claims as there is no proof - don't forget the 250i has only been on the market for 3 months, and all will be revealed the moment a review publication tests it. Time will tell...

Clinton Jensen (Perreaux Technical Director)'s picture

Incidentally, here is a review of the éloquence 250i integrated amplifier: Unfortunately no tests yet.

Clinton Jensen (Perreaux Technical Director)'s picture

Here is a review of the 250i showing the power output into 8 Ohms: OK, it's in French, but the chart on the last page show the output was measured at 298W with only a 1dB rise in distortion. Further down the page it measured at 2 x 375W into 8 Ohms at 0.4% THD+N. Very reassuring to see third-party tests reflect our own in-house testing...

Enter your Sound & Vision username.
Enter the password that accompanies your username.