Amp4 Slim

[makruzz]

Hello everyone

Im thinking of building a amp4 in slim a copper case, it will be about 140*58*35 L*W*H
and a passive preamp with the same dimensions to accompany it.

So im wondering if caps 102 and 103 can be tilted towards the big caps without making it sound bad. I will omit the big caps as i will run it of a SMPS

updates of the build will come as soon i start building the case


//Makruzz

[tuo]

I have got similar idea of an AMP4 in a slim case fed with a SMPS. Now my case would be 40 mm in inner height, so in theory the amplifier would fit, since those C102 and C103 caps are 35 mm and the PCB together with the power stage chip add another 5 mm to the height.

In practice I'd like to see a bit of room between the caps and the case, so I have searched a couple of possibilities to replace the caps with lower ones. Here's what I have found:

- Panasonic FR-series: 1500 uF, height 30 mm: http://search.digikey.com/scripts/Dk...name=P14447-ND
- Rubycon cap, 1500 uF, height 30 mm: http://de.farnell.com/rubycon/35zlh1...35v/dp/8126674

Now both of these manufacturers have a series of these capacitors and in both series the one step smaller cap is 1200 uF with a height of 25 mm. So this way you could get the total height down to 30 mm. Now only question left is that is 1200 uF enough for this use?

[makruzz]

Thank you tuo for the answer

I will be building the case from scratch from a copper sheath so i might just heighten it a bit to fit those caps you suggested, thank you for the research.

I am also wondering if the original caps can be bent parallel with the PCB, that would mean that the leads would go a bit over the pcb before they bends 90 degrees or does that risk damaging the sound?

[V-bro]

I've done that a few times and found no difference in performance actually. It's not the most elegant, but sometimes an inevitable solution...