Building a new reference LDR pre amp

[struth]

Hi Grant
Yes easy to put together, there are lots of diagrams and images, and I am here 24/7 giving help.
LDR's are a passive - although some would infer from the audio they provide, akin to a active pre amp

I have yet to find a combination of equipment that failed to impress, or work exactly as required
Yes Richard is right I use a Quad 306 that has a 22k input impedance

The advice I can give is use a source component with ability to drive into a 600 ohm
load - thats about 99% of everything available as most will now do as low as 100 ohms
or better, particularly modern DAC's . and a power amp with input impedance above 20k,
and sensitivity of 800 mv or less, which thankfully also is the majority of power amps,

The old days of insensitive equipment and specific source components are thankfully long gone,
LDR's being capable of being a top choice of attenuation to preserve audio at the preamplifier
analog line level , and at the same time getting along well with other equipment.

Cheers / Chris

Thanks Chris. is ebay the best place to buy one fir you?

[Light Dependant Resistor]

Thanks Chris. is ebay the best place to buy one fir you?

Yes, Thanks Grant

[Sovereign]

I hath to commend Chris on his incredible patience. I had a few problems that was only due to my severe lack of intelligence. Chris guided me through on Skype

[Sovereign]

Well maybe a year later, my LDR pre amp is finally finished! I was somewhat distracted by making my Wonfor monster Class A power amp in the middle of my LDR build. So here are a few snap shots of the finished build. In this time Chris at Stereo Coffee had a new LDR board for me to fit, as I was having a few teething problems I packed up just the LDR side of the amp and posted it to him in New Zealand, well while my amp was there he used it to try a few modifications on, and in doing so he has completely re built the whole amp, so a BIG hats off to Stereo Coffee for their Stirling service! I'm pretty sure my LDR is one of a kind, especially as I have a dual power supply and dual mono LDR amp.
The real qualities about this amp is the speed of the music and the timing is as quick as a certain Jamaican sprinter. The musical presentation is wider and musician / singer placement and transparancy is exceptional, I most definitely feel closer to the music. There is more detail coming through for sure, I love hearing all the timing nuances of David Brubeck on the piano, and musical inflections I had no idea were there. I have never heard so much detail, such a wide musical presentation with pin point musician placement with enough drive and grunt for my power amp to lap up.
seriously though Well done Chris at Stereo Coffee.

[Ali Tait]

Looking good mate, glad it's doing the business for you.