AOS Exclusive Review of Eco-Fan Sound Pre-Amp and Power Amp

[Spectral Morn]

Looks like my Auntie Rose (who was Uncle Roy on weekdays).

Jack's one of the most talented, underrated, unknown, audio designers out there. He is based in New Zealand and fronts Ecofan Audio and I have been blessed to hear a number of his designs and review them.

Hope you're keeping well Jack.


Regards D S D L

[adam_ecofansound]

hi all,

an interesting development down here - a batch of 'ten tube' and 'eight tube' ecofan preamps will be completed this quarter, please feel free to make contact if anyone is interested. spanking new valve rectified power supplies on the way too...

regards,

adam

p.s. thanks dalek supreme, m cuts his own path...

[Jack Williams]

Adam: Please use the "caps-lock"!
Amps coming: 6A3 ones (single-ended, direct coupled) and pre-prodution BSEA small and bigger monoblocks.

[Jack Williams]

Got the steam turntable platter back from expert machining by a good friend of mine the other day.
Stripped and perfectly centred here it is with Garrard bearing, Audioquest Sorbothane mat and 12v DC brushless motor. A good idea to get the hum away. Go camping with a car battery.

[Jack Williams]

I lived on a beach away fom the grid at one time.
It was interesting when checking if the mike input was working on my battery reel to reel tape recorder. Put finger on input. No hum. Not that the input isn't working, but that there is just no hum.
Is this constant living in a hum field benificial or not??

[Spectral Morn]

I lived on a beach away fom the grid at one time.
It was interesting when checking if the mike input was working on my battery reel to reel tape recorder. Put finger on input. No hum. Not that the input isn't working, but that there is just no hum.
Is this constant living in a hum field benificial or not??

Hope you are keeping well.

That is an interesting question. I suspect not (gut feeling) but I don't know enough to say more than that.


Regards D S D L

[Jack Williams]

This is progressing. A stereo chassis a-la single-endeds. Fourteen valves including four of 6A3 in outputs. As I am using at present with 2A3s, but as for type 45s, in "lash-up" form. Tranny will be altered for the 6A3s this very morrow.
Chassis is ordered.

[adam_ecofansound]

hi,

have recently listened to the revised BSEA amp, very smooth and musical, good frequency extension, an 'effortless' sound...

murray is certainly onto something good

cheers,

a

[Jack Williams]

The amp has been operating for a while now with the 6A3s and new power transformer tailored for them. I have to say, now it is "burned in" and after an hour, say, of warm up it has great depth and presence.
I have had a comment about the 6A3 single-endeds being a bit hummy on big sensitive horns. The BSEA of course gets over all that with the balanced output, but no phase splitter. Transformer magnetising current also balanced out of course, so no gap, and extended bass. I have the OPTs rated over three times power of amp.
Although this amp does not show hugely more power than single 6A3 one on instruments, it gives the impression of effortless power on these 94db speakers.
Definitely the best of both worlds! Getting three chassis made and will have couple of these machines for sale and maybe even review.

[adam_ecofansound]

hi,

all go in this hemisphere - cup fever in the wider populace and plenty of action at ecofan... stay tuned for further news.

we will be shipping a new 'balanced single-ended' amplifier to the uk within the next month or so - feel free to get in touch if you are interested hearing it.

regards,

a