My Completed Krell KSA 50 Clone - Pics

[lgreen]

Building this amp was really a great example of "community" here at DIYaudio.com.
Despite the fact that the "Krell KSA 50 PCB" thread has over 3600
posts a lot of very smart people read it every day and answered
highly technical (and basic, and stupid) quesitons. The Krell KSA 50 Build Wiki contains
all the basic technical information and resources. People on that
thread bend over backwards to help each other out. Its really
been something special, I was very impressed.

Anyway, on to the amp, a few pics were first posted in the
massive Krell thread, but that thread is pretty unmanageable so here we go.

[lgreen]

[lgreen]

Sorry about the size of pics, if you have dialup you are going to be sitting for a while.

[lgreen]

[lgreen]

Ok, so I'm still working on the cover.

Stats-

- switchable from low bias to high bias, currently biased at 50W/8
ohms into 8 for high bias and 20W (??) for low bias.
- heat sink temp is about 61 deg C for high and 50 for low, depending
on how you set the fans of course, but its not overly loud at these temps.
- 4 pairs of MJ21193/94 per channel
- 128,000 uF per channel, plays for >5 sec after turned off even at high bias.
- Aerogate 3 personal computer fan controller and temperature monitor.
This allows for 4 channels of temp to be monitored, and
for speed monitoring and conntrolling of 4 fans.
- two fans, one 40mm on the bottom blowing up and a 120 mm on the
top blowing up.
- Dual mono from the AC inlet onwards, even soft start is dual mono.
- two 700 VA xformers.
- weighs 70 lbs/ 32 Kg.
- 22 mV (left) and 28 mV (right) DC offset
- the amp is bolted to the bottom wood plate. This is to ensure that
the fan intake has sufficient clearance.
- after much debate I decided to keep the heat sinks live.

Just starting to listen to it now, I can tell bass is not going to be a problem.

I'd keep rambling and posting pics, but I already did that on my web site, click Here for a ton of pics and my running narrative.

[MikeW]

Very nice. Good job. I am sure you will like the sound.

[Buzzy]

Was it difficult to build it ? May i know the estimated cost to build it ? It looks very powerful.

[Upupa Epops]

How I see, right angle isn't necessary in America....

[pinkmouse]

Right angles are for squares!

[Nordic]

Loveing the woodwork.....