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Old 23rd November 2012, 02:36 AM   #41
freax is offline freax  Australia
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Quote:
Originally Posted by Alan Cohen View Post
He also has an interesting DIY speaker project using full-range Tang Band 8" drivers. I built a pair for <$600 and they sound excellent for that $$$. 95dB sensitivity is very loud with 3W. They will work nicely with 1W and scream with 15.

Transcendent Sound DIY Specialist in Vacuum Tube OTL Amplifiers

I would be interested in a DIY speaker if it involved a single large 12" driver on the bottom in addition to a full range driver on the top /or/ it was a single 8" full range driver with an easy to build speaker design that went all the way to the floor and met up at my ears at a Height of 35 inches from the floor on average.

With a room of these dimensions: 10ft x 10.5ft and 8 ft high.

I want something REALLY big, something with a very large driver for bass but also very very efficient, something that is floor standing.

I'm still looking over my options on this matter

Last edited by freax; 23rd November 2012 at 02:45 AM.
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Old 23rd November 2012, 10:48 AM   #42
tubemax is offline tubemax  Netherlands
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Hi,

Maybe Audio Nirvana 15 inch full-range driver in 5,6 cu inch BR box...
One driver, no crossover, ±97db sensitivity, big box, big sound... it seems nobody is complaining about this driver...
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Old 23rd November 2012, 09:31 PM   #43
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I just finished this kit,
KT88 SE Basic or Master Kit
Sounds great, i supplied my own chassis and the documentation was superb
Rob
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Old 24th November 2012, 03:48 AM   #44
freax is offline freax  Australia
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That sounds PERFECT!!!

I'll look into it with intense interest.

I even have a couple of NOS GE 6L6 tubes too, using them shouldnt be impossible
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Last edited by freax; 24th November 2012 at 04:07 AM.
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Old 24th November 2012, 04:24 AM   #45
freax is offline freax  Australia
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I've decided and I've figured that the OTL design is simply outside of my budget, not because I cant afford to buy it but because I cant afford to RUN it with the cost of electricity being so high.

I want to be able to listen to my amps as often as possible, not just within the hours of 10pm - 7am

The old sony does have one thing going for it, when paired with my apple tv (1watt) and my ipad 3 (battery power) and the sony amp (0 watts when off at the front, no really, I was surprised too, and 13 watts when powered up) that combination simply cannot be beat during the daytime for low energy consumption.

Airplay enables me to send audio from my ipad from either soundcloud or the shoutcast app, while I am doing other things on my ipad 3, like write this post, to my apple tv and consequently to my amplifier via the optical output.

I dont even need to have a monitor hooked up to the apple tv because it always responds to a request from the ipad 3 to stream audio to it over airplay.

I think its an apsolute cruel joke on the part of acer to have a monitor that draws 7 watts when its off.... thankfully a digital timer shuts everything down when I dont need it.
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Last edited by freax; 24th November 2012 at 04:39 AM.
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Old 24th November 2012, 03:16 PM   #46
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Quote:
Originally Posted by freax View Post
I want to be able to listen to my amps as often as possible, not just within the hours of 10pm - 7am
I hear that. Mine is on from the minute I walk in the door until I leave or go to sleep.

I had no idea electricity was so expensive down there.

I have a vintage pop-up camper circa 1969 that I recently installed a deep cycle battery and inverter into so me and my boys can have a little juice when we're in the woods. From that experience they have learned not to take electricity for granted. If they leave a 7W light on for an hour, that's 2 hours less computer time they will have.

We added some solar panels this year which helps, but we also added a 115V fridge and TV. My oldest snottily asked me. "so when is it not camping anymore, Dad?" I quipped back, "the day you first brought your GameBoy along, we were no longer camping". "Any more questions"?

So anyway, now I understand your hesitation with OTLs. But as a tease, my 15Wer is done and burning in...
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Old 25th November 2012, 11:31 AM   #47
freax is offline freax  Australia
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I must say the view is breathtaking!

Thank you for sharing with me! It put a smile on my face
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Old 25th November 2012, 01:45 PM   #48
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Quote:
Originally Posted by freax View Post
I would be interested in a DIY speaker if it involved a single large 12" driver on the bottom in addition to a full range driver on the top /or/ it was a single 8" full range driver with an easy to build speaker design that went all the way to the floor and met up at my ears at a Height of 35 inches from the floor on average.

With a room of these dimensions: 10ft x 10.5ft and 8 ft high.

I want something REALLY big, something with a very large driver for bass but also very very efficient, something that is floor standing.

I'm still looking over my options on this matter
For big, easy to build and efficient, you could do a lot worse than this, inspired by one famous thread in some other forum. Drivers are in ear level.
Click the image to open in full size.
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Old 25th November 2012, 01:47 PM   #49
freax is offline freax  Australia
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Wow are those baffle curtains!? amazing!

I question the use and placement of a dryer drum though in the room....

Thank you for sharing! and please PM me with any further details on them.
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Last edited by freax; 25th November 2012 at 01:51 PM.
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Old 25th November 2012, 03:38 PM   #50
tubemax is offline tubemax  Netherlands
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<I've decided and I've figured that the OTL design is simply outside of my budget, not because I cant afford to buy it but because I cant afford to RUN it with the cost of electricity being so high.

I want to be able to listen to my amps as often as possible, not just within the hours of 10pm - 7am>

Hi Freax,

Maybe is time to re-think about some class D chip amps if electricity bill is the issue - as far I know there are no tube amps with power consumption less than at least 100 WATT's of total power waste for a amp.
300B SET class A amp is even less efficient for a given watt of power than PP tube amp... but then we are not talking about reference amp anymore?
I have sold my 300B SET after hearing good OTL - there is just no comparison... two pictures of my past 300B & 6AS7 OTL.

Max
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