Following my shenanigans with speakers and the disappointing PM4001, I've got my old Cambridge Audio A4 hooked up with the Marantz CD5001 and Cambridge Audio S30s and I can't stop listening. The sound is detailed, has depth and absolutely sure footed soundstaging, is very dynamic and tonally as accurate as anything I've heard for a long time. Now this A4 is getting on a bit and its not been treated quite as well as the rest of my gear so I'm wondering about snapping up an A5 for the current price of £119.99. Its all led me to wonder whether the A-series amps are forgotten jewels of budget audio. Certainly the A4 leaves the PM4001 standing and its more musical than an Arcam A65+ I heard recently. Does anybody else feel the A series amps have a magic which is somehow missing from the Azur series, or is it time for me to go back and try the 340A, 540A, and/or 640A again?