KEF 107.1 or B&W 802 S3 Matrix

Hi Rhino5,

The kube came out of a generation of speaker makers (including B&W and Bose) who were experimenting with changing up what happens in the cabinet vs. the amplifier as well as allowing you to better match your room placement and personal tastes.  These EQs were very specific to each speaker model though. 

In the end though it is nothing more than an equalizer, so any good quality DSP can substitute so long as it is configured correctly. You can use the Stereophile graph to approximate the specific 107 curve:

https://www.stereophile.com/content/kef-r107-loudspeaker-1991-measurements

So, my point is, if you need more bass, but your current speakers don’t have it, and you are OK with new electronics in the system, why not try a Schiit Loki first? It’s cheap, gets good reviews here, and may make it unnecessary to switch speakers.

Best,

E

I used 107/2s for years with Parasound JC-1 monoblocks, a great combination. I loved the sound. As I understand it, KEF chose not to use internal circuitry and instead rely on KUBEs matched to specific speakers. KEF claims reproduction is not accurate without the associated KUBE. Unfortunately the KUBE is single-ended, not balanced.

I got hooked on the Ayre sound, and the KUBE was not compatible inserted between the Ayre preamp and amp -- according to Charles Hansen, nothing is. I use KEF Reference 1s now that may be a bit superior above 50 Hz, but I miss the LF extension of the 107/2s. Somehow supplementing the Reference 1s with a pair of Velodyne HGS-15s just doesn’t sound quite the same.

My advice is to buy 107/2s with the KUBE. The JC-2s really made a difference, so I’d go with amps that can deliver lots of current. A pair of rosewood 107/2s is a handsome addition to most rooms.

db

Thanks for the link Erik.

db, thanks for recommendation. I auditioned a 107 with the Morel tweeters and they were a bit bright for me taste. I'm looking forward to hearing what the original tweeters are like. 

I'm going to audition 107s that have not been used for 5 years. All original and nothing has been done to them. I'm guessing I need to be careful not to push them too hard without checking them out thoroughly. 

I think the tweeter is what differentiates the 107/2 from the 107.  I've never heard the 107s, but JA's review in Stereophile claimed they were bit lacking in the high end and the 107/2 cured that.  You might want to read his review of the 107/2s.

db

The KEF 107 has the soft dome t33 tweeter while the 107/2 has an aluminum tweeter. The t33 tweeter was used in many KEF speakers in the 80s and 90s. I have never heard the 107/2 but I would think that the aluminum tweeter would be brighter than the t33. Replacing the ferrofluid in the t33 is a fairly simple job.