SPEAKER IMPEDENCE CALCULATOR
https://speakerimpedance.co.uk/?act=two_parallel&page=calculator
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Comments
Big knob LM308 version
Big knob non-LM308 version
Small knob non-LM308 version
I have fitted an LM308 chip to all my Turbo Rats, the 2 small knob versions sound pretty much the same - however the large knob version sounds better for some reason. A difference I have noticed between the big and small knob versions is they use different pots. The big knob versions use chunkier pots, the distortion pot seems to have has a nicer sweep than the small knob version and it seems to allow a better range in the lower to medium gain range. However the small knob version can be made to sound very similar to the big knob version.
I really want to try a big knob LM308 Turbo Rat to see what it sounds like compared to my other 3.
It sound good and it was cheap but it is small and I do wish I'd bought a regular sized one. If I remember rightly it is supposed to be a bit thicker and a bit less bitey than the original but I haven't personally compared the two. The good thing about the Black Secret is it has both regular and turbo modes so you can figure out which is your favourite before buying a real one if you decide to go down that route.
Bandcamp
Spotify, Apple et al
I tried a bog standard "genuine" rat ages ago but obviously there's no way I could compare that to the mooer, you need to have the two things head to head to have any meaningful comparison.
But yeah the mooer one is pretty nice if you get it cheap enough. I'm under no illusions that the "genuine" one isn't probably built a bit better, but having had the two modes, I wouldn't be too keen on buying a rat which didn't have the clipping options since they make it a lot more versatile.
http://www.youtube.com/watch?v=lnL-_WQWJD0
Love my boggo Rat 2.
Having heard a load of Youtube clips comparing circuits with and without LM308 chips, I'd say I wouldn't go out of my way to get an old one with an LM308 in it. But saying that, Youtube isn't that reliable so YMMV etc.
I had one for a little while, it was like a Rat, but smoother and thicker. More 'amp-like' if you will. I really liked it, but the standard Rat 2 was a bit more versatile.