After advice from here and elsewhere I got my quad 303 upgraded by net audio. :) [I]Current system: Cyrus CD8x, Quad 33 (Dada mods), Quad 303 (full net audio upgrade), Mission 773e speakers. Ixos cables. Music: I love a broad spectrum eclectic music, especially classical music(except classical era) and 70s rock but the grail for me is to have a system that does choral music well in big acoustics (I was a chorister in St Pauls).[/I] I'm wondering whether I can get any improvements over the quad 33, and am thinking about the passive route. Does anyone have any experience of this, or give any advice? I decided to try to simulate passive pre by using an inline attenuator by modding an IXOS cable with 20kOhm resistors. This was not nearly enough as the climax of the four last songs donated a decent dose of distortion. I hadn't realised it was so loud, perhaps because having missed out the quad 33 pre, the gained clarity, openness and feeling of presence, was extraordinary, it never felt harshly loud. I'm now at 160kOhmsish and that is appropriate for a sunday morning listening level in a block of flats, though Dieskau just had one small brief bit of distortion in a loud bit of the Dichterliebe. Is a passive pre a viable option in my system? If it is, what max impedence is appropriate?! What are peoples thoughts about this upgrade route? I was thinking of net audio or glass house pres. Cheers for any thoughts! Jamie