6SN7 5692 Tests

May 14, 2008 | Other

I’ve made no secret of my high regard for the qualities of the 6SN7 family of twin triodes when properly used as voltage amplifiers. My experience was affirmed by an interesting set of measurements presented by Morgan Jones in “Valve Amplifiers.”...

NHT M3.3 Cabinet Drawings

Apr 28, 2008 | NHT M3.3

For you cloners out there. This will be a challenging item to make… Click here to download the pdf of the drawings.

Biamping the NHT M3.3, p3

Apr 28, 2008 | NHT M3.3

The Bass Section Ok, I’m going to say something heretical- in this speaker, renowned for incredible bass, the bass is compromised. The Foster 1259 12″ driver has a very strong motor and can pump a lot of air; the designers chose to mount it in a very...

Biamping the NHT M3.3, p2

Apr 28, 2008 | NHT M3.3

We first consider the high-pass portion to the 6” upper bass driver (an excellent unit by Foster, proprietary to NHT). The driver’s Thiele-Small parameters are given in this table: Fs (Hz) Qes Qms Qts Sd (m2) Vas (l) Mms (g) Res (ohm) Le (mH) Sens (dB/1M/2.83V)...

Biamping the NHT M3.3

Apr 28, 2008 | NHT M3.3, Speakers & Crossovers

UPDATE February 2011: A better way to do this has been added at the end. A PLEASANT SURPRISE An email came. I could get a set of one of my all-time favorite commercial speakers at “a ridiculously low price.” Would I be interested? I did not hesitate. Rewind. If you...