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Re: Back EMF? [message #67438 is a reply to message #67413] |
Thu, 05 May 2011 10:36 |
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Wayne Parham
Messages: 18787 Registered: January 2001
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Illuminati (33rd Degree) |
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spkrman57 wrote on Wed, 04 May 2011 11:57 | I have used the following small tubed amps on my 4-Pi spkrs utilizing 8 and 16 ohm 2226 drivers with no problems:
45/2A3/300B/Triode strapped EL34
I will re-iterate what Wayne has said in the past concerning the 2226 liking more wattage than what the little amps put out for max performance (10 % of max or 60 wpc).
I agree with that, but I will say that the dropoff in performance using little tubed amps under 10 wpc is not really that drastic. I don't know too many other 15" drivers that would work as well for me!!!
Just my 2 cents worth of course!
Regards, Ron
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Absolutely, I agree. I use mine with 10-watters and have been very happy with them on 2A3-based 2-watters too. They're fine, sound great and are quite loud.
The thing about the 2226 at low power levels is not related to Zmax or back-EMF in any way. It's the fact that the driver was designed to handle a lot more power, and the electro-mechanical parameters shift at moderate levels. So at flea-power, the tuning of the system makes it lack bass a little bit. It will actually shift to have more bass at higher power levels. But the speaker was design with this shift in mind, and it never shifts into an underdamped (peaky) condition. It is always slightly overdamped, and shifts a bit under the curve, but never anywhere close to an underdamped condition. This is a very friendly alignment, tolerant of shifts.
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Re: Back EMF? [message #67443 is a reply to message #67442] |
Thu, 05 May 2011 14:38 |
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Wayne Parham
Messages: 18787 Registered: January 2001
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Illuminati (33rd Degree) |
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Frihed89 wrote on Thu, 05 May 2011 13:31 | I intend to buy the higher price mid-range drivers and tweeters from Germany or the UK. Is that what you mean?
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Yes, the most important parts to upgrade are the midwoofer and tweeter compression driver.
Frihed89 wrote on Thu, 05 May 2011 13:31 | I don't particularly relish spending a lot of money on cross-over caps. (The 2A3 that I am getting has no film caps at all. It is a single stage DC amp). Since I'll buy the cross-over units from you, already populated, I'll take whatever you give me. What are the standard grade caps ? Sonic-caps or something like that?
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We maintain inventory of Erse, Solen, Jantzen (Cross-Cap and Z-Cap) and Auricaps. All are polys. When I get an order that specifies a particular brand, then I use them of course. But if not, I just use whatever I have most stock of. They're usually Erse or Jantzen Cross-Caps, but may be another brand. They'll definitely be high-quality poly caps.
Frihed89 wrote on Thu, 05 May 2011 13:31 | My amps are: 12W Class A PP triode made by Jef Larsen, a 10W 300B integrated made by Audio Note (UK) and 3.5 W 2A3 made by Don Garber (Fi).
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Excellent. Sounds very much like the amps I have in various rooms. I have an Audio Note Kit 2 (SET KT88), a Stoetkit (UL 6BM8) and an Image Audio (SET EL34).
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