Anyway they have been back hooked up to the bass of my Revel Studios and must be pretty close to full break in. They are a pretty big step up from the SP4's with more bass depth & definition. Kick-drums for example, kick harder. I'm running Cullen cables on mid & high's, they are incredible value for money and have bested some higher priced cables in this area. They are not as good as the SP7's when running the bass driver's, they have quite good definition but lack the weight of bass that the SP7's transfers. I'll swap the SP7's over to the mid & high's soon, I did earlier but preferred the Cullen's in this area although the SP7's wern't fully broken in then.
So do I recommend the SP7's? Well, on the proviso you get the 60% discount on the trade up program (the RRP, like some other cable co's. is a joke), and for driving bass drivers, I feel they are very good at transferring lower frequencies. Just listening to a disc as I type and the kick-drums thump! Of course I would need to try many more cables to be definitive but they have bested a few other cables in this area. For mid & high frequencies and "full range" I really need to experiment a bit more, but thumbs up so far for bass delivery.