More laid back than the T5p's and on par with the Alpha Dogs with regards to forwardness. Regarding extension, the T5p's reach a bit higher and their forwardness sometimes might be a bit too much on some tracks. Alpha's and Shure's are actually similar to my ears (regarding Treble). These are NOT bright as the usual Shure fare. They compare on the "highs" to the SRH1840s which in a way were similar to the Sennheiser HD600 signature (meaning warm-ish but detailed.) But in overall signature I liken the 1540s to the 840s but more detailed, more exact in the mid-bass to mids transition with more sub-bass and tamed treble energy. Hopefully I'll chime in with more if necessary when I get all three of them again and use them at home. ;-)
vs. Sig DJ comparison yet???