Any Digital Impressions of the Caiman yet?

**Themis** · 12-10-2009, 10:11

Hi Stan,

I read the Caiman's booklet about headphone impedance, and I'm not sure I understood how it works...
It's written 1h-32ohms, 3h-64, 4-300 and 5h-600ohms : does this mean that at power on the Caiman checks the volume control and adapts itself ?

Thanks for explaining,

**Clive** · 12-10-2009, 10:27

Originally Posted by Themis

Hi Stan,

I read the Caiman's booklet about headphone impedance, and I'm not sure I understood how it works...
It's written 1h-32ohms, 3h-64, 4-300 and 5h-600ohms : does this mean that at power on the Caiman checks the volume control and adapts itself ?

Thanks for explaining,

I think that means at the those clock positions you have the corresponding impedance match.

**StanleyB** · 12-10-2009, 10:30

No it doesn't. That's how it works. Unlike speakers in general, headphones come in an impedance range that covers a 20 to 1 ratio. i..e from 32 ohms to 600 ohms. So for a fixed amplification factor, the maximum gain will be reached at different level of the volume pot.
If anyone ever invents an automatic headphone impedance detector, or there is one out there, let me know. It would be very helpful.

**Themis** · 12-10-2009, 10:34

Thank you for your quick answers. It's MUCH clearer now !

**sum1** · 12-10-2009, 10:43

Originally Posted by StanleyB

If anyone ever invents an automatic headphone impedance detector, or there is one out there, let me know. It would be very helpful.

I believe the Graham Slee Solo headphone amp has such a feature but how it works i do not know

**Labarum** · 12-10-2009, 10:45

Originally Posted by StanleyB

headphones come in an impedance range that covers a 20 to 1 ratio. i.e. from 32 ohms to 600 ohms.

You are lucky, Stan, it's only 20:1!

What impedance would the phones have that I used with the crystal set radio I built when I was a boy? Over 1K?

In the late 1970s I owned a pair of supposedly HiFi Headphones by Pioneer that had piezo-electric transducers - how would they load an amp?

**StanleyB** · 12-10-2009, 10:58

I have no idea how they would load an amp Brian. Headphone amp design is not the same as power amp design. But I don't wish to get involved in discussions about that aspect of designing. There are numerous headphone orientated websites and forums that have far more and better info.

**lemon** · 13-10-2009, 10:16

Are there any internal close-up photos of Caiman?

**Gazjam** · 13-10-2009, 10:32

Think you'd have to buy one Lemon, theres a lot of Stans Competitors would like to get ther eyes on the internals of one.
No manufacturer publishes photos of this type as far as I know?

Gaz.

**StanleyB** · 13-10-2009, 10:49

Originally Posted by lemon

Are there any internal close-up photos of Caiman?

Hi Jack, have you considered designing your own instead of copying mine

?

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