Audio Research Classic 150 Monoblocks Skin Emblazoned With
Audio Research Classic 150 Monoblocks Plus Another 1

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The output tubes should last at least 2000 hours, but given the fact that two Ref 250s use a total of 22 fairly costly tubes, many in matched sets, and throw off a lot of heat -- each pulls 770W of 120V juice at rated output, 1000W at maximum -- I turned them on only when I was playing music; otherwise, they were shut down.

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I cant confirm the truth of that adage -- my own father is alive and well -- but Ive found that certain life-altering experiences have triggered new levels of responsibility, capability, and growth.

I felt more a man after marrying my wife 15 years ago, and even more when my children were born.

I suspect that when my parents shuffle off this mortal coil, another era of manhood will begin for me.

Johnson retired in 2008, handed over the reins, and set ARC free.

Special Editions of the Reference 5 preamplifier and Reference Phono 2 phono stage incorporated lessons learned from the Ref 40, and ARCs earlier line of Reference 110, 210, and 610 power amplifiers have been replaced, respectively, by the Ref 150 stereo and the Ref 250 and Ref 750 monoblock models.

Common to all are greatly enhanced power supplies, Teflon output capacitors, upgraded internal wiring, and other surgical changes.

I was excited to see if the same would hold true for the power amplifiers.

With my systems need for monoblocks, a set of Reference 250 amplifiers (25,990pair) was the natural place to begin my explorations.

Audio Research Classic 150 Monoblocks Skin Emblazoned With

As Ive come to expect from ARC, the double-boxed packaging has a white outer skin emblazoned with the declarations There Is Only One Reference and High Definition.

Between the inner and outer boxes is a six-sided cushion of Styrofoam; the inner box further protects its contents from damage with closed-cell foam supports and a heavy-duty poly bag.

In that one box, and for each of the two amplifiers, were three matched pairs of KT120 output power tubes, one matched pair of KT120 drivers, two 6H30 gain-stage and regulator drivers, and a 6550C regulator.

The total 22 tubes were extremely well protected, and labeled for proper and unconfused installation.

While the typical customer should expect the dealer to personally deliver these amps, install the tubes, and connect the works, reviewers must fend for themselves.

Luckily, each clearly marked tube (thank you, Sharpie) corresponded exactly to its waiting socket, as illustrated in the guide.

Seeing the high-quality circuit-board material (a dark tan substance known throughout the industry for its superior mechanical and dielectric qualities, not the ubiquitous green fiberglass) and elegant circuit traces, the distinctive transformers that dominate the center line, the banks of large KT120 output tubes and similarly oversized Teflon output capacitors to the left, and the fields of power-supply devices at front right and hugging the back of the faceplate (to cram in some 900 joules of storage capacity), no one need ask, Wheres the beef.

Audio Research Classic 150 Monoblocks Plus Another 1

The Ref 250 is large -- 19W x 8.75H x 19.5D, plus another 1.5 for the handles -- especially compared to the very compact MX-Rs.

The review pair came in the same black, brushed-aluminum finish of my Ref preamps.

The more common ARC combo of natural aluminum faceplate and handles is also available.

Overall, the look is masculine, in an updated retro style I thought was cool.

Nevertheless, and no matter how much my wife loved the sound, she repeatedly teased that the Ref 250s reminded her of the Hatch on Lost, and asked if she, like Desmond Hume, was expected to press a button every 108 minutes to avert catastrophe.

Below this are indicators used in connection with biasing the output tubes, and below those is a row of five circular, contrasting silver buttons labeled (from left to right): Fan, Light, Power, Bias, and Meter.

Because the Ref 250 is a tube design, it has no Standby button.