Now u r thinking how it sounds? So was I. Well It does alter then sound a little bit, as anything u would connect would do, but in a good way taking off a small bit of transients. Like a compressor would do, but the amount is miniscule, and is kinda miraculous how the unit doubles the input and gives u two signals so pristine, without electric power supply. Also If it was active, it would change the sound so much more. As a passive DI also is a very good transparent/no coloration one. Kinda like the Neve and BSS DIs, and unlike the Radial coloration ones like J48 and JDI, witch I love If I want coloration, as It depends on the task. So it?s a no fear of loosing tone box, very well made, and I just give the four stars in finish for some bubbly details on the finish paint , but sending it back for that would be nonsensical. Thomann just sent this and other expensive non PRC with the items boxes floating and crushing around each others doing some minor cosmetical injury in the boxes. I wish they just put a bit of protection inside. But again not something that would made me sent stuff beck. In a peculiar german fashion the factory box for the lehle is very good but is so hard to keep using the box to store the unit, becouse is hard enough to put it back! I guess not many people would use the box to keep the unit, but still, they could easely improve this. All in all u get a non perishable piece of european/german engineering, worth every euro, and will give u more u paid for in sound quality. Unlike cheap stuff u will never regret over it. If u want stereo guitar or bass, or using different signals, plus a passive DI for free, (and there r more things this unit can do!), go buy one, and rest assured It will not rob your tone. Superb.