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Old 18th June 2009, 12:16 PM   #561
iko is offline iko  Canada
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Oooooh! I'd say between 40 and 49. Can you recommend smth?

Edit: I'm about to go for a v-strom ride in the rain, so... I'm looking forward to your answer when I'm there.
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Old 18th June 2009, 12:19 PM   #562
AndrewT is offline AndrewT  Scotland
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Default off topic

I just listened to the first few bars of "temptation" (Athens audiophile).

I don't have the original in any format, but I can tell you that the quality coming from disco speakers (15"+compression horn) is far better than YouTube can provide.

Why do you tubers think they can demonstrate Audio Quality via that medium?
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Old 18th June 2009, 12:19 PM   #563
Salas is offline Salas  Greece
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Quote:
Originally posted by ikoflexer
Oooooh! I'd say between 40 and 49. Can you recommend smth?

Edit: I'm about to go for a v-strom ride in the rain, so... I'm looking forward to your answer when I'm there.
They say good words for the Elsinore and I guess its right for your space.
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Old 18th June 2009, 12:23 PM   #564
Salas is offline Salas  Greece
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Default Re: off topic

Quote:
Originally posted by AndrewT
I just listened to the first few bars of "temptation" (Athens audiophile).

I don't have the original in any format, but I can tell you that the quality coming from disco speakers (15"+compression horn) is far better than YouTube can provide.

Why do you tubers think they can demonstrate Audio Quality via that medium?

At least in that video it was something like a tribute to the dreamer audiophile. I have seen other videos though that a guy says ''here is my new speaker'' and others comment ''Good! I can say even from the video''. Just enthusiasm I guess.
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Old 18th June 2009, 01:27 PM   #565
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HI IKO my suggestion http://www.quarter-wave.com/Project08/Project08.html
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Old 18th June 2009, 01:41 PM   #566
iko is offline iko  Canada
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Elsinore? Yeah, but then I have to build a serious power amp. You see how one can end up like those guys in the video? Slippery slope isn't it?

nico, I've been thinking about full range for some time, maybe.

Thanks guys!
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Old 18th June 2009, 02:00 PM   #567
jeepee is offline jeepee  Netherlands
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Hi Ikoflexer,

great to see you latest results. It's always ensuring when practice and theory are in line.
As you write it's fun to do this exercise and it extends our understanding.

I think you can even further simplify the remote sensing, by leaving J2 and J3 in the shunt part, on the left side ground/supply. These are merely current sources, so "should not have a notion of voltage". That way you only have 2 components (ZT and Q3) as the remote sense.

Elaborating further on the idea of having dedicated shunts for each circuit stage, you can just put multiple transistors for Q1. Currents will not be matching exact, but that's not important here, since the excess current is shunted anyway. So the amount of extra components is minimal, one extra Q1 per dedicated shunt stage. Combined with remote sensing, it can still be a modular/scalable design. For example make provision for 4 shunts, what's not needed you simply don't mount on the PCB.

I don't know if this brings some sonic value though, but just for the record.

How do you test stability? Do you use a transient step response and observe the ringing?

JP.
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Old 18th June 2009, 02:04 PM   #568
AndrewT is offline AndrewT  Scotland
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J2 & J3 are part of the measuring bridge.

They must be included in the bridge so that the output (error signal) can be the control signal for the shunt element.
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Old 18th June 2009, 02:08 PM   #569
Salas is offline Salas  Greece
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Quote:
Originally posted by ikoflexer
Elsinore? Yeah, but then I have to build a serious power amp. You see how one can end up like those guys in the video? Slippery slope isn't it?
Just a couple of Hypex ready made modules and you are done.
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Old 18th June 2009, 02:14 PM   #570
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no digital please
thinks how can clean the bass from 18" in openbaffle and how big the soundstage of sweet jordan inOB
(or at last fostex as Iko like details

Salas update in your speakers project?
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