Any Digital Impressions of the Caiman yet?

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Originally Posted by technobear

A 10% higher voltage will give 21% higher power - that's a fifth more and easily audible!

(Power = volts x amps, for a fixed impedance if volts goes up 10% then current goes up 10% and therefore power goes up 21% since 1.1 x 1.1 = 1.21)

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As I said, I didn't look at the maths. From memory (40 year old memory)

For watts 10 log (P1/P2) [The 10 is there because we want the answer in deci Bels, not Bels]

For volts 20 log (V1/V2) [The 2 is there because of Technobear's point.]

gives the dB between the two signals

20 log (2.0/1.8)

according to Google calculator this is

20 log(2.0 / 1.8) = 0.915149811 dB

ie about the limit of human discernment.

This site seems to confirm my memory

http://www.astralsound.com/the_decibel.htm

Anyone more knowledgeable want to chip in?

The "limit of human discernment" is frequency-independent ?

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Originally Posted by StanleyB

Any first impressions of the Caiman power supply?

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Originally Posted by technobear

They haven't arrived yet :(

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Ooops! Spoke too soon! One just turned up :)

The system is warming up :eyebrows:

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Originally Posted by Themis

The "limit of human discernment" is frequency-independent ?

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It is frequency dependent and different for each individual.

Those fitted with digital hearing aids (like me) go through a testing procedure conducted by an audiologist.

How these factors affect the current discussion, I don't know.

In my primitive understanding there are three factors:

The threshold of hearing.

The threshold of pain.

The ability to discern differences in sound intensity between the two above limits.

All, I believe, vary with frequency and between individuals.

The digital hearing aid is adjusted in a number of frequency bands to optimise the energy injected into the ear without crossing the threshold of pain at any frequency. This I did not appreciate till the fitting. For years in the Army my ears were tested - the threshold of hearing at all frequencies. When the aid was fitted a second test was done to establish the maximum volume I could tolerate at any frequency. Fascinating subject, and I with I understood more.

For those with impaired hearing the difference between the threshold of pain and the threshold of hearing is reduced; which is why, perversely, the deaf cannot tolerate loud noise, and especially high frequency noise. Those with good hearing cannot understand this.

So, it seems, I didn't imagine the volume difference between the NAD 525 and the Denon dac, after all. ;)

My PSU came yesterday but I've not managed to gain exclusive access to the living room for a good listen :(

Hi guys I haven't posted on here for a while but I am still trying to make up my mind about the Caiman. I find myself something sceptical about it, not that I am not impressed with the Beresford 7510, I am. However it is because of this that I wonder just how much better it can really sound?

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Originally Posted by daveyboy

Hi guys I haven't posted on here for a while but I am still trying to make up my mind about the Caiman. I find myself something sceptical about it, not that I am not impressed with the Beresford 7510, I am. However it is because of this that I wonder just how much better it can really sound?

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Let me help you as a 7510 with mods owner.....the Caiman is better....by a fair old margin.

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Originally Posted by NRG

Let me help you as a 7510 with mods owner.....the Caiman is better....by a fair old margin.

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Agreed. The Caiman is in a different league to the 7510 - I have both.

Yep, I repaired a modified 7510 here, good dac but the 7520 with Caiman mods is better by quite a bit imo