Best of the best

Needs space and hi-end equipment

1) Producing large soundstage and details.
2) If you like sweet mids, this is the one which you need to have a try.
3) The bass are punchy and controlled, will not giving you those boomy bass but fast and deep bass.
4) Body is built rigid and strong, and heavy too.

1) The body is 121kg, is very heavy and not easy for listening adjustment.
2) The tweeter do not sound bright and forward, may not be everyone's taste.
3) I've listen to it using Nagra VPA power amp, though it sounds very very lively and real but the Response 4 will punish the tube if playing with high volume classical or other sources. Hence I do recommend it is best to match Res 4 with
strong solid state amp if you need to play loud.
4)Positioning is very demanding, and it needs lot of breathing space.

This speaker really add life on what I've heard. Initially I intend to buy the Wilson Sophia, after auditing the Response 4 standing beside, there is no way back to the Wilson.

Response 4, as a full range speaker, do really plays whatever you throw at them very very well. I am very impressed by the way it sings the vocals and classicals.
It makes songs or musics feel so lively that you couldn't bare to listen to other speaker after listening to this speakers.
The highs are silky smooth, though the extension may not be as good as the Diamond or Beryllium tweeter. It can produce a very big and detail soundstage which can immense the listener being like listen LIVE.
The Mids are the one that kills my wallet, the two ATC mids are producing sweet mids,bonds the highs and lows seamlessly.
The Bass produced by the two ATC 9" woofers are punchy and dynamic and fast.

Similar Products Used:

Harbeth HL Compact, JBL Control 12SR, JBL 4338

Very revealing, yet musical. If set up and driven properly, these speakers "sing". The imaging is such that you wonder what all the 5.1 fuzz is about.

Demanding on the front end. Tricky to match with power amp. These speakers are large and need space. Addictive.

These are very demanding speakers, capable of outstanding performance. Very demanding on the power amps, must be driven by tubes. ProAc recommends Audio Research but I was not impressed. I use a pair of Einstein OTL mono amps, rated at 50 Watts into 8 ohms. If positioned correctly, the soundstage is deep and wide. They deliver surround sound with a two channel system. Very addicitve! I have not heard anything better yet. These monitors let you hear every tweak, like the effect of changing the direction of the signal cables. I achieved a dramatic improvement by simply bi-wiring them. This is a speaker for the ones with "golden" ears, highest quality tube amps, and a lot of patience to set them up.

Similar Products Used:

ProAc Response 2, Quad ESL

Mid and bass is excellence, especially human voice and the orchastra music response 4 can provid perfect soundstage.

THE POWER AMP IS THE MOST IMPORTANT FACTOR IN ORDER TO MAKE THE SPEAKER IN GOOD PERFORMANCE. THE BEST MATCHING POWER AMP IS ONLY JADIS JA500 SO I MAY COST A LOT OF MONEY.

IF YOU HAVE ENOUGH SPACE THIS IS THE BEST CHOICE THAT I NEVER HEART. I LIKE THE SOUND QUANITY ESPECIALLY THE MID RANGE eg. HUMAN VOICE , AS TO THE ORCHASTRA MUSIC IT CAN PROVIDE EXCELLENCE QUALITY IF YOU HAVE THE GOOD POWER AMP. AND ROOM SPACE.

revealing, soundstage and darn good bass

none i could think of for these well made bookshelf size speakers

very handsome made speakers. probably the pyramid for loudspeakers in such size. excellent sound stage and its clarity is amazing. selecting good amplification is important. They sound a little bright for me when using Tag Mclauren. Good sounding with Music reference RM9. I have also tried them on a pair of McIntosh 30 with good result. Musical Fidelity could be nice with them. Need good stands at 24": Target or Foundation would give better bass and better focus.

Similar Products Used:

celestion sl700, dynaudio 1.1, monitor audio 6

midrange+tweeter excellent performance in piano, violin and human voice.reflexive bass unit needs powerful amplifier to generate low frequency down to 20Hz

the price is too expensive that not every one can afford it.

1.excellent when listening the piano plays, every note pop out lively from the speaker.
2.it takes a spacious room and accurate positioning to create a precision sound stage. just like a whole orchestra in front of you and every instrument clearly shows where they are.