hi,
new to the ecofan family are a pair of altec lansing A700's (with altec electronic crossover and very serious ss amps...) - should ease the development of the 'super low noise' triode equipment,
more news as it happens,
a
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hi,
new to the ecofan family are a pair of altec lansing A700's (with altec electronic crossover and very serious ss amps...) - should ease the development of the 'super low noise' triode equipment,
more news as it happens,
a
Not a follower of rugby as such, but the Kiwis will overcome all opposition (or not!) so it remains to be seen. We do have a reputation for "punching above our weight" here, probably spurred by our smallness and isolation. We have to be larger than life to be even noticed on the croweded world stage.
Looking into the bigger monoblocks using four of 6550, I have come to the conclusion that the best sustem there is still the parallel single-ended system. The most power, and lovely elegant design amps, worthy of carring forward. Expect more of these shortly.
On BSEA amps: Five chassis are being ordered, two for a couple of four times 6A3 ones, and two of same with 2A3s.
Exra chassis is experimenal to try such as SV-811-10s or what about type 50??
A bit of interest in preamps lately, so am revamping some earlier ones and looking into a couple of new ideas.
Alongside power amps of course, and while the blokes get on with the amp chassis.
Should have been a couple more dots after "chassis".Quote:
Originally Posted by Jack Williams
Big interest in another batch of the circlotron monoblocks, of which another three pairs are also being concocted.
Adam showed photos of high end gear ten times the price of Ecofan equivalent.
What sort of circuitry and transformers are under those bizarre cosmetics?
Makes one wonder if there's room in "HiFi" for sensible products at believable prices.
I think I've just about cleaned out the posibilities of amplifiers. Direct coupled, no phase splitter, balanced output as in push-pull?
No output transformer at all as in the circlotron OTLs. (But still a phase splitter)?
Then there is the SEOTL, which has no phase splitter OR OPT.
That has been in use for some time last year or so, and is being upgraded with upsized power transformer and more grunty front end as in BSEAs. That's a pretty ultimate amp, but is pretty inefficient and hardly "eco"!
It also doesn't sound like an amp at all.
Here is a merry blaze of perfectly good transformer windings!
For many years I have saved the core laminations from surplus transformers and used them in various amps and projects. I have kept any good windings in case one is needed to replace a burned out one of the same type.
These have piled up in nail boxes and never been needed. Also, if one is in fact ever needed I can easily wind a nice brand new better one.
Copper is some $7.00 a kilo right now.
Two of those bins is worth more than a $250 melted down $20,000 work of art in the news.
It's really neat actually. The lamination size of the power trannies on the above amp and also the 20w OTLs are the most common old valve radio ones. The covers are too off them.
So those have already entertained people for decades, and are now away again in a new life. Generations of entertainment from them! Modern ones in the OPTs though.
This is, after all, Ecology Fanatic Sound Ltd.
hi,
the ecofan altec-lansing a700 system is going to be housed at nz's 'audio foundation' hq.
the a.f. is a not for profit org that runs exhibitions and concerts of avant-garde and experimental music - as well as an annual festival that attracts prominent composers and performers from around the world.
http://audiofoundation.org.nz/
the rig will be serving as high intensity sound reinforcement for the next few months before becoming the ecofan 100db/w test rig,
regards,
adam
Hi all,
I've recently been fortunate enough to be able to compare the Ecofan 6a3 and Ecofan OTL monos in my system.
The 6a3 produced a warm, but not overly lush, sound. Bass and treble were balanced and extended, and images were well defined and three dimensional. The Almarro A318B sounded warmer in comparison, with greater low end weight, but subjectively less extension and control. The 6a3 just sounded familiar and right.
The OTL's most impressive trait was the bass. Forward, controlled and detailed. Possibly too forward in some systems, with certain material, but very impressive with the Musical Affairs Grand Crescendos.
Treble was extended and detailed, but not at all bright. Mid-range was cool yet textured and holographic. The OTLs produced a room filling sound that was like a cool breeze on a hot day.
I didn't prefer one amp over the other. They are both great amps, but in very different ways. The 6a3 was immensely pleasing to listen to, the OTLs extremely refreshing.
I used a Silk TVC and an Intact Audio AVC. Both very pure, but both sounded rather lifeless compared to Murrays Linestage.
Photos to follow.
Here is a fun quiz:
The below circuit is part of a product by a well known maker of HiFi audio.
What can you find wrong with this circuit, and what are it's advantages?