Review: Audio Research Corporation HD 220 Amplifier


Category: Amplifiers

My musical tastes include primarily classical, jazz, folk/blues and some exceptional rock. Specific recordings can be discussed via phone @ 610-721-1304. Soundstaging, dynamics, transparency and coherence are paramount, while the correct tonality and warmth are of equal concern. In other words I need it all to be right or else I sell the stuff! My HD 220 has 300 hours on it at this point and it is exceptional indeed. My recent decent into Krell evo solid state gear left me wanting so I sold the rig and started anew.

When a system is in the "zone" for me it conveys lifelike dynamics, accurate tone, clarity with warmth and soundstaging to die for!! This amp does it like no other I've had on all types of music (taken as part of my current setup). One major note...USE THE STOCK POWER CORD!!! The HD 220 started to amaze me aftethunderousr I decided to try it's own power cord in place of my reference cords. As long as my ref 3 has a great power cord all is well. The amp conveys a sense of limitless power with explosive yet controlled dynamics...it is effortless but with great force and dynamic swing!! Treble is extended and full of sparkle but grainless and pure at the same time. Midrange is full and neutral with a tad of warmth, but not overdone. Bass is earth shaking and well defined with amazing definition. Focus and placement of instruments is the best I've heard. Width and depth of the soundstage is top notch as well. Palpability and presence are eerie baby...spooksville!!

Compared to the other great tube amps past and present it connects on excitement, dimensionality, dynamics and extension without the tube haze, lethargy and softness often found with their presentation. I prefer it over the 110 for real world reasons and for purely musical ones. Overall it takes one away with the music where very few other components take you!!

Money is no object for me ...the HD 220 is staying..it's that good!!

Associated gear
ARC Reference 3 preamp
Krell SACD standard V5.1
Krell Resolution 2 loudspeakers
MIT V2.1 Oracle IC's and speaker interfaces
Transparent MM power cord (ref 3)
MIT AC2 power cord (Krell SACD)
ARC stock power cord (HD 220)
Wattgate recepticles
Dedicated 20amp lines

Similar products
ARC VT100, VT200, VS110, VM220's, Ref 110, Ref 610T's
Krell FPB 600, 400cx, 350Mcx, evo 402
Levinson 336
128x128dave_b
Sure Rayden1972, whereas the 110 is ultimately more seductive in the midrange and lower treble on some material, the 220 retains the dimensionality and enough of the 110's traits here. Inevitably, the 110 (tube amps in geberal) soften transients a bit too much and aren't the last word in bass control. A certain tube film can permeate the soundstage on well recorded ensemble material. Microdynamics are a tad more engaging on some material thru the 110 but it is system dependant to some degree. The 220 gives me what I've always enjoyed about the best tube and solid state designs...dimensionality instead of paper cut outs and fixed images, roundness without bloat or hyper inflation of images, tonal accuracy without listening fatigue, warmth without haze or grain. Macrodynamics are explosive, bass expansive and controlled, treble pure and extended, midrange neutral but realistic and alive with action!! By the way I have had no quirks, noise, hums or problems of any kind from my HD 220 or ref 3...it is absolutely dead quiet when no source material is going thru the system. The fans on the HD 220 keep it at a nice warm but never hot state...they do make some residual noise on soft passages, but my brain has already begun to filter it out during my listening session. If the unit is placed in an open setting, the fan noise is almost inaudible...I have a custom cabinet setup so the noise is amplified a bit! When I add the CD 7 this fall I believe I will have just about all of the virtues of tubes without the headaches and drawbacks of output tubes.
Just thought I'd mention that I had faulty wiring on my Reference MM power cord (had it re-terminated for 20amps and it was wired wrong). I fixed it myself today and played the system for a couple of hours...everything good about the amp became stunning. The entire presentation has closed the gap between the HD 220 and the reference 110 and 210...it is absolutely huge, open, airy, lush and crazy dynamic..the midrange has become glorious and oh so vivid..bass is subteranean with great pitch, treble delicate and incisive without any edge or harshness. In other words the HD 220 is closer to a true tube amp than I originaly thought, but without limitaions at the extremes...power seems inexhaustable! This amp is a no brainer..I fully expect it to garner much praise in the months and years to come.
Dave, I'd be very intrigued if you managed to listen to your HD220 powered by an Elrod Statement or a Purist Anniversary PC.
Tried the purist..not my cup of tea! Have not heard anything superior to the Transparent MM or MIT Ac2's.
I revisited the stock power cords again on the amp first and then the ref 3 with currently 300 plus hours on the equipment. The ARC power cords get the dynamics and tonality dead on with exemplary transparency. My reference cord on the sacd standard provides all the purification needed for the rest of the audio chain, given my Oracle IC's also deal with signal distortion farther along the signal chain.