Ardbeg Perpetuum is the 2015 Ardbeg Day release, celebrating the 200th Anniversary of the Ardbeg Distillery. There is no age statement. Ardbeg reports that both bourbon barrels and sherry casks were used for aging Perpetuum. The reviewed bottle has been open for 1 month and is courtesy of @Nock
Colour: very pale
Nose: sharp-edged, mostly high pitched slightly acrid smoke and medium-sweet peat accompany well-integrated malt flavours. Brine and a very slight hint of wine influence are well-integrated into this phenomenal nose. Absolutely first rate. If you hadn't told me there was wine cask used here, I would not have thought there was any present
Taste: sharp on the palate as it is in the nose, especially after 4 weeks of air time; bitter briney peat is more prominent in the mouth than in the nose. The palate is not as well balanced as is the nose, but still very enjoyable
Finish: goes a little more sour and bitter than I would have preferred, but if you like sour and bitter, then you will like this. The acrid peat and smoke hang around on your tongue for a week
Balance: loses balance on the palate into the finish. Four weeks after the bottle was open the flavours have come out even more strongly than at first. They are, however, less harmonious 4 weeks later than they tasted when the bottle was first opened. I rated Ardbeg Perpetuum 91 points when the bottle was first opened
The wine influence in Perpetuum is so slight as to be almost imperceptible. Overall this is a very nice Ardbeg, which in style is very much like Ardbeg Ten. For me this would be about a 70th percentile Ardbeg Ten in quality, at twice or thrice the price of Ardbeg Ten. The nose is truly outstanding, however, and very worthwhile
Water added: 1) homogenised the nose, 2) emphasised the smoke and brine on the palate, and 3) mellowed out the finish and made it much smoother
Strength: excellent strong flavours, other than the wine which might as well not be there. Score: 24/25 points
Quality: very good quality of all of the flavour elements, before it steers strongly sour-bitter. Score: 23/25 points
Variety: very good selection of flavours, when you look at the nuances. Score: 22/25 points
Harmony: balance and harmony are excellent in the nose, but are lost mid-palate going into the finish. Score: 19/25 points
Total non-sequential score: 88/100 points
Comment: this is another good Ardbeg. I'll be happy with one bottle of this one, though, and will shop for good batches of Ardbeg Ten at half the cost
I had a sample of the Committee release. Was decent but not worth the $400+ it goes for.