Best match with Proac Response Series

Hi:

I used to own ProAc Response 2 speakers. The following electronics worked extremely well with these particular speakers (this is the configuration a local audio dealer - Audio Center in Deerfield Beach, FL) whose opinion I trust recommended to me):

SUBWOOFER (optional): Vandersteen 2WQ (ideally, stereo pair);
AMPLIFIER: Audio Research VT-100 mk. 2 with stock tubes;
PREAMP: Audio Research LS-15 (LS-16 is also probably a good match; sound can be fine-tuned by replacing stock 6922 tubes(4) with NOS tubes; talk to Kevin Deal at Upscale Audio for particular recommendations once you have allowed your final system configuration to settle in;
CABLING: all Cardas Golden Cross interconnects and an internally bi-wired length of Cardas Golden Cross speaker cables (they complement the Audio Research gear perfectly);
SOURCE: as per your tastes

All of this equipment has been superceded by "newer" versions, and is thus available at great prices (I believe they represent lasting value, because of their great build quality, inherent musiciality, and probably resale value not far from your probably used purchase prices).

Hope this helps!

Another option that I heard with ProAc Response 2.5 speakers that worked very well was:

SOURCE: Audio Research CD2
PREAMP: Audio Research LS-15
AMPLIFIER: Audio Research VT-100 mk. 2
CABLING: all interconnects were Nordost Blue Heaven and speaker cabling was internally bi-wired Nordost Blue Heaven.

The character of this system was much more light and airy than the previous setup I recommended (which was much more centered around the midbass and midrange).

My personal preference was the previous setup (demo source at the dealer was Theta Miles CD player and all interconnect was balanced).

I've found that the ProAc Response 2's mated very well with Rowland amplification.I've unfortunately not had the opportunity to audition the R2.5.

Dpare, I've just happily settled into a system which includes ProAc Tablette 50 Signatures. I've heard some people say the Tab 50 Sigs are close to the Response Ones in sonic character, although I have no experience with the Response line.

My system consists of:
Theta Pearl CD transport
Bel Canto DAC 1.1
Simaudio Moon I-5 integrated
ProAc Tablette 50 Signatures
NHT SW3P subwoofer

Cables include:
Kimber Illuminations D60
Cardas Golden Cross
DH Labs Silver Pulse
Analysis Plus Oval Nine

The Moon I-5 has a very neutral balance overall, with great detail and huge soundstaging. While not a bright amp, the neutral balance of the I-5 didn't work well with the ProAcs early on, even when using Golden Cross interconnects. But that was before adding the Bel Canto and the Theta. Those two pieces added a very smooth and refined sound to the mix which showed off the musicality and soundstaging capabilities of the Tab 50s. The AP Oval Nines also added much fullness and warmth overall, as well as extending the soundstage even more.

I have a balance which I'm enjoying very much. Warm and smooth at the right times, and dynamic and involving when it should be. People had mentioned that ProAcs work well with tube systems. I had considered changing the Simaudio for a Rogue or Blue Circle setup, but that was a few months ago before it all came together. Now I'm quite content with what I have.

Experiment if you can, and have fun!