Thank you for your comments. Sorry Plato, I don't know where the 1200 watts came from, but may have been supplied by the site. Bob_bundus is right in correcting the watttage. Actually I only have the Wavelength Duettos (8 wattts/channel) right now and may never get to the Wavelength Tritons. Thank you for the advice on preamp idle noise; it is something I'll have to look into carefully.
Power ouput of these amps is more like only 12 watts, not 1200. However that might be enough depending upon speaker sensitivity? My 104dB horns seem to like about 200 watts/ch if I'm really rockin'-the-house, otherwise 5 watts is generally plenty for some still pretty darn loud SPL's. Plato raises a very good point regarding preamp idle noise though. Even though these horns were designed & built before solid state componentry was even available, I've never been able to get used to that tube-rush idle noise when running tube equipment into horns. There are probably some tube pre's that are quiet enough, but none that I tried were really acceptable; maybe the Golden Tube SEP2 or SEP3 but not a Cary or VTL.
Now that sounds like some system -- 1205 watts into high-efficiency horn speakers, yikes!!! I don't know where you're located, but if you turn the preamp volume up to about 11 O'clock I could probably hear it, whereever you are! Since you are using a tube line stage and have high efficiency speakers where noise may be a factor with a low output MC cartridge, I would go solid-state on the phono preamp. A used AHT Non-Signature or the new InnerSound phono preamp may fill that bill nicely, providing splendid performance at reasonable prices. If you require tubes, the Herron phono stage is a great piece.
try steve deckert's new phono preamp. i bought and like his decware zen amp. from the white paper, the phono section sounds promising at $1000 (or at any price for that matter). www.decware.com not affiliated with deckert at all, BTW.