For Sale: one pair of Nuforce Reference 9 monoblock power amps with TDSS Level 3 Upgrades. These are in excellent shape (8/10) and sound great. They are effectively only two years old and come with original packaging. They also have QSA light blue fuses installed ($71.00 each).
The amps were built as 'new old stock' in Feb. 2020 by TDSS using original Nuforce parts that had been kept as spares and the brand new parts needed for the TDSS Level 3 upgrade.
The Nuforce Ref 9s were one of the first Class D amps to get strongly positive reviews:
https://www.tnt-audio.com/ampli/nuforce_ref9_e.htmlhttps://www.theabsolutesound.com/articles/nuforce-reference-9-monoblock-power-amplifierhttp://v2.stereotimes.com/post/nuforce-reference-9-v2-se-amplifiershttps://positive-feedback.com/Issue32/nuforce_v2.htmThe TDSS Level 3 Upgrade takes these amps to a much higher level and eliminates some potential reliability concerns with the original stock model. The Level 3 upgrade includes a much bigger and better power supply which massively boosts power (from 160W at 8 ohms and 300W at 4 ohms to 320W at 8 ohms and 480W at 4 ohms). TDSS certificates of conformance are included for each amp. The TDSS Level 3 upgrades cost $975 per amp (ie $1950 for upgrading the pair, excluding the cost of the amps themselves).
TDSS (Technology Design and Support Services) provided engineering support for Nuforce (and Nuprime) in the US. Their upgrades were officially authorised by Nuforce and they are the acknowledged experts on these amps. You can find detailed information on the upgrade here:
https://www.mytdss.com/reference-series-upgradesIn addition to the customer reviews posted on the TDSS website, you can find more glowing comments on the TDSS upgrades by searching for 'TDSS' on the forum at Audiogon.
I am selling these amps because I am downsizing my system. I am looking for $1499 or so $1299 for the pair, including paypal fees and shipping within the CONUS.THESE AMPLIFIERS ARE NO LONGER AVAILABLE FOR SALE.
