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Old 11th November 2010, 09:59 PM   #11
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Quote:
Originally Posted by Allen Wright View Post
This is flat out INCORRECT. P-P cancels even order harmonics generated WITHIN the amp - it DOES NOT affect the music's harmonics, second or otherwise.

OK?

Regards, Allen
Perhaps my reply was too generalized. I'm not the best writer here.
Quote:
Originally Posted by tubelab.com View Post
A good SE amp will have the second harmonic as its primary THD component.

A good P-P amp will add some second harmonic, and the primary THD component will be a mix of third and some second harmonic. Some higher order harmonics will be added on strong signals.

A well balanced fully differential P-P amp will add nearly no second harmonic and its primary THD component is third harmonic.
Thus they do sound different.
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Old 11th November 2010, 10:20 PM   #12
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Default Watts of SSE with KT88/UL

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Originally Posted by chrisb View Post
out of curiosity, how many watts do you get from the S SE with KT88/UL, and with which OPT?
Chris,

When you last heard my SSE it was with EL34s running in triode. I have since changed to KT-88s and running in UL mode it certainly seems to have more power though I could only guess at the wattage. I'm away this weekend if you want to borrow the amp to evaluate with your speakers.
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Old 11th November 2010, 10:25 PM   #13
rknize is offline rknize  United States
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Quote:
Originally Posted by chrisb View Post
Russ, out of curiosity, how many watts do you get from the S SE with KT88/UL, and with which OPT
It should be on the order of 12-14W, but I have not measured it myself. I'm using the "big honkin'" Edcors (CXSE25-8-5K).
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Old 12th November 2010, 12:13 AM   #14
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Quote:
Russ, out of curiosity, how many watts do you get from the S SE with KT88/UL, and with which OPT?........It should be on the order of 12-14W, but I have not measured it myself. I'm using the "big honkin'" Edcors (CXSE25-8-5K).
I had one assembled with the same big Edcor OPT's and the Allied 6K7VG power transformer. I ran it in every mode possible. With EL34's in triode mode I got 7 WPC. With KT88's in UL I got 14 WPC. I stole the OPT's out of that amp to build a Tubelab SE with 307A pentodes, but that amp never got finished.

I have a pair of Yamaha NS-10M Studio monitor speakers in my work room that are 87 to 88db inefficient. The room is only 10 by 11 feet so the SSE is plenty loud with either tube setup. I prefer the EL34 in triode for music where detail is important, and the KT88 in UL when I crank up the rock. I still find that I prefer the sound of the TSE with 45's but that is suitable only in a dead quiet environment with those speakers.

I have a pair of Hawthorne Silver Iris 15 inch Open Baffle (96db) drivers mounted in a pair of 1941 vintage Zenith console radios in the living room. There speakers are not great at resolving delicate details, but the bass from Pink Floyd can be heard inside the house across the street with the KT88's in UL.

I have been building amplifiers using tubes, transistors and chips (no digital stuff yet) for over 40 years. I have built some speaker systems but they have either been for guitar amps or disco thumpers, no HiFi stuff. That has changed. I decided to make a set of speakers. Actually I couldn't decide on exactly which set of speakers, so there will be two sets. I got several conflicting stories about what would be sufficient for my music and favorite 2 WPC amp (the 45 based TSE) and I lucked into some trades that netted me the drivers, so all I needed to buy is wood. When these are done I may have different opinions about tubes and speakers.

I decided to start on the big guys first since those drivers showed up first. They are nearing completion. The big ones:

S.P.Q.R. EZ10 for the AN Cast 10

When they are done I will start on the FE166En based FH3's.


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Old 12th November 2010, 01:17 AM   #15
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I could not help but post this, I just finished a pair of speakers not to long ago. I use these with my SPP amp. 8" paper woofer and silk dome tweeter.
Noah's 8's - Techtalk Speaker Building, Audio, Video, and Electronics Customer Discussion Forum From Parts-Express.com
I built these from plans so I cant take all the credit
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Old 12th November 2010, 01:48 AM   #16
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I have a friend who has some real expen$ive ($10K+) full range (plus sub)horn speakers with Lowther drivers. My amps went to visit them. They sounded real nice, probably the best sounding system that I have heard. So, $10K or even $1K speakers are out of my price range, but I am willing to buy some plywood for science. I even sprang for the good stuff.
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Old 12th November 2010, 02:05 AM   #17
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Default diy speakers

I have around 300 in those. But you cant put a price on the experience of doing something yourself. I used 3/4 mdf and those things are a ton. these caught my eye maybe for a future speaker project
95 db sensitivity too
Dayton PS220-8 8" Point Source Full-Range Neo Driver | Parts-Express.com
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Old 12th November 2010, 02:40 PM   #18
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Quote:
Originally Posted by tubelab.com View Post
I decided to make a set of speakers. Actually I couldn't decide on exactly which set of speakers, so there will be two sets.
Speaker building is fun and addictive. I find there is something especially satisfying about constructing a set of full range, back loaded horns. I would have predicted the first set you build would not be your last, but it seems you've already made that decision.
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Old 12th November 2010, 11:38 PM   #19
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Default speakers

hartley1_editedresize.jpg

hartley2resize.jpg

Here are my current speakers, 2nd diy build, hartley 7" tweeter, 4" eton mid and 10" hartley woofer. Used to have JBL 2405 supertweeter. I am going to replace them one day. Have run these with a passive crossover and different amps from hafler 100wpc, 75tl push pull monoblocks, 6c33c stereo se and el84 stereo push pull. all sounded great just a bit different.
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Old 13th November 2010, 01:28 AM   #20
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by tubelab.com View Post
I had one assembled with the same big Edcor OPT's and the Allied 6K7VG power transformer. I ran it in every mode possible. With EL34's in triode mode I got 7 WPC. With KT88's in UL I got 14 WPC. I stole the OPT's out of that amp to build a Tubelab SE with 307A pentodes, but that amp never got finished.

I have a pair of Yamaha NS-10M Studio monitor speakers in my work room that are 87 to 88db inefficient. The room is only 10 by 11 feet so the SSE is plenty loud with either tube setup. I prefer the EL34 in triode for music where detail is important, and the KT88 in UL when I crank up the rock. I still find that I prefer the sound of the TSE with 45's but that is suitable only in a dead quiet environment with those speakers.

I have a pair of Hawthorne Silver Iris 15 inch Open Baffle (96db) drivers mounted in a pair of 1941 vintage Zenith console radios in the living room. There speakers are not great at resolving delicate details, but the bass from Pink Floyd can be heard inside the house across the street with the KT88's in UL.

I have been building amplifiers using tubes, transistors and chips (no digital stuff yet) for over 40 years. I have built some speaker systems but they have either been for guitar amps or disco thumpers, no HiFi stuff. That has changed. I decided to make a set of speakers. Actually I couldn't decide on exactly which set of speakers, so there will be two sets. I got several conflicting stories about what would be sufficient for my music and favorite 2 WPC amp (the 45 based TSE) and I lucked into some trades that netted me the drivers, so all I needed to buy is wood. When these are done I may have different opinions about tubes and speakers.

I decided to start on the big guys first since those drivers showed up first. They are nearing completion. The big ones:

S.P.Q.R. EZ10 for the AN Cast 10

When they are done I will start on the FE166En based FH3's.


http://www.diyaudio.com/forums/full-...ta-builds.html
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George: I think you mean FE126?

Fleming: thanks for the offer - this weekend looks a bit hectic for me, but I might take you up on that some other time.
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community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi
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