I am so sorry about this
above post. I copy and pasted - re-wrote a paragraph, and left
both paragraphs in there. My mistake. No way to correct / edit the duplication now - after the first hour's showing. Sorry !! It now appears as though I was doubly bragging.
That was not the intent !!! I was only telling you things, as experienced .
In that amplifier build thread, I found that post discussing how my tube amp-lifier design differs - from everyone's conventional tube amp.
Sixteen design areas, each of which I find are ultra-important - are incorporated in this 2021 tube amplifier's build !! See them all listed here :
OK, thank you so very much for the clarification !!! Please take some time, and study the Softone web site, as nicely detailed information on their audio output transformers is provided. They also offer an R-Core Interstage, that is likely very good. You might enjoy seeing all of that, if...
www.hifivision.com
The S.E. 6005 amp project is moving along nicely, making decent progress - over the last two days. In India, F.M. Harry Iyer, and Sadik, have been fabulously assisting. Thanks guys !! .
Tonight, we are 90% done the CAD drawing work of the 14 gauge welded steel stereo chassis. With the needed CAD files, half a dozen chassis are to be machined, starting next week, at this shop :
www.4mmc.com
Purchase Orders for R-Core power transformers were initiated just yesterday in India, with a Distributor of Shilchar Technologies. The new amp has a computed 96 VA power draw, and a 320 VA sized R-Core power transformer is to be used. Large enough.
Jeff
Appreciate the clear and specific feedback
@drlowmu. I am so used to the 20 (?) - 50 hz experience now that I miss it when it’s not there. Please correct me if I am wrong, but good powered subwoofer can further augment the signal from very low powered SET amps to lower than 50hz bit. I am no expert on electronics, but I remember being informed that its the voltage from the amplifier that matters to a powered sub with its own amplification? So a pre amp level voltage @2v should suffice?
In my opinion, a subwoofer is a piece of junk, to be avoided - it is for mid-fi use only by the masses.
Why ?? It usually has a different amp on it, and so, it plays out of time, out of coherence, and with a different sonic signature. If a person uses more than one amp on a system , as in " biamping ", there is ONLY one correct way to do it. All four amplified channels in a stereo biamp, ( upper and lower, left and right ),
MUST be exactly the same. It almost never is !!
But with biamping you still will lose out. Why ?? Because you need to add a whole EXTRA set of active electronics, line level, to initiate and feed the biamp's split signal. There are fidelity losses going through ANY extra stage.
Simplest is best. With loudspeakers, practical / simplest in my experience, is a
two way speaker system. A one-way speaker, a single Lowther, etc., won't hack it. 101dB or higher, direct front-radiating, and hopefully, front-horn-loading, with a 15 inch quality woofer is satisfactory.
The three best high-quality drivers I know of in this world are professional :
1) vintage Klangfilm,
2) ALTEC, or
3) ALE ( $$$$ ) from Japan, a Q-Ced copy of an ALTEC .....at 20 times the cost.
Klangfilm, professional German movie theatre speakers, from pre WW2, are unobtainium.
My ALTEC 515B 15 inch plays from 50 hZ. to about 3.5 khZ,
with out a crossover on it. Driven-directly, 8 AWG equivalent silver-content speaker wire, from a 1.5 Watt DC SE amplifier. Less, is more, but only IF you have great great equipment. Analogue sources, directly-coupled two-stage tube amps, silver-content speaker wire and a 101 or higher dB two-way speakers.
Recall, my friend's 10.75 cubic foot GPA MLTL plays into the mid 20s, subjectively to my listening. Have you forgotten that ?? This plays down low using a fabulously designed 2 Watt 2A3 amp.
If it were important to me, to have mid-20 s response, I would copy his speaker design.
But overall, I only prefer to hear my
front-horn-loaded 15 inch play into my living room. My friend's MLTL speaker is on a flat baffle. Not for me !! A
front-radiating, front-loaded horn, with an ALTEC 15 woofer in it, in a VOTT enclosure, has spoiled me rotten - for life - I think !!
Have fun, I am now, finally !!
Jeff
It took me a long time in audio, with much high end equipment coming and going, to arrive at my present system. Recall, I owned seven-way speakers that measured, the widest band ever in their day,( plus or minus 2 dB, 12 hZ to 100 khZ. ) So what ! The amps needed to drive it were PIGS. Now, I am happy with MY self-built amps, and 50 to 15 kHZ playback. It only took me about 40 years to arrive here !!