ASTROSIM (cab simulator)

[deadastronaut]

hi guys , finally finished up my cab sim project.

i present ''ASTROSIM''

very happy with it, now i can just plug in a few pedals
and record/play without an amp, and silently too...
special thanks to samhay for his input, and putting up with me annoying him a lot ha ha...cheers man. 
anyway...

includes line out, headphones out, and XLR out.....
Modern/Vintage switch.
and 3 tone/boost options.

at the end of the vid i added
a demo recording of double tracked guitar, with no post EQ at all...so you get an 'honest' idea of it..
with bass and drums...endure or enjoy...

cheers rob. ...

[EBK]

So, when you say, "USE NE5532 ONLY," what do you really mean by that? 

[bluebunny]

It means don't mess with the spaceman: he's got you on long-range scanners.   

[dschwartz]

So, when you say, "USE NE5532 ONLY," what do you really mean by that? 

The NE5532 works best because its driving abilities.bit is perfect for the DI and headphone out (although in my experience, a bit quiet at 9v)
It also is very low noise compared to a jfet opamp.
I assume you can use a tl072 for the filtering stage (very clever, astro!) But I don't know if the low input impedance of the ne5532 (300k) is used for something.

[Marcos - Munky]

I want it!

[pinkjimiphoton]

holy shit mate, that sounds @#$%ing incredible!
pulled the trigger on a pcb, SOLD!!!!!

that said,, all the devices in the video sound incredible, along with your tone and playing.
right on rob!
thanks man!

[deadastronaut]

Cheers guys, yeah the ne5532 behaves a lot better than the 072 for phones etc...

Hi Jimi,  cheers man, all wrapped up, will send it off to you in the morning, if I don't get snowed in ha ha..

Thanks man .   

[pinkjimiphoton]

i may just replace my stage amp with it and go direct into the pa, man, that sounds killer bro.
well done!
where's a sausage when ya need one?

[bluebunny]

where's a sausage when ya need one?

[bluebunny]

pulled the trigger on a pcb, SOLD!!!!!

I am also feeling the tug of the tractor beam... 

[patrick398]

Sounds fantastic man, much kudos! Looks killer too!

[pinkjimiphoton]

i've been dicking around with an "everything in a box" for a while... a chinese chipamp, with delay, belton, a couple channels.. this thing would be perfect right between the channels and the amp. all in one 1590dd... 90 watts, runs off a computer supply.

but even better, is with this, screw the amp, i can just go di. i love it! was building a sansamp for that, but, hey, robs just plain sounds better!!

of course his pedals may have something to do with it too... that skinwalker is TITE!

[deadastronaut]

' that skinwalker is TITE!'

yeah man, its very quiet too....nice for chunky stop start stuff..

i love a fet dirt....

pcb on its way man...

[GibsonGM]

Good work, Rob....GREAT tone there!  I'm impressed!

[pinkjimiphoton]

next time i order, gonna get the skinwalker and black triangle od, and probably the chasm too... i sold the one i built, the guy LOVES it and uses it as his main verb in his studio.

the three boards for 25 pounds is a great deal, just a little too broke to boogie right now.

but yeah.. i don't usually care for high gain stuff, but man, like i said, that sounds TITE!!!!! well done bro!
the astrosim really is the icing... and it tastes good!

[pinkjimiphoton]

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[aron]

Sound great! Super playing too!

[Rob Strand]

Yeah sounds great.

.nice for chunky stop start stuff..

Is that why you let more lows through?

Is "unnamed" 3 position switch all off in the centre?

(You could use a TL072 for the *sim part* but I you might need to add about 470 to 680 ohms between the output of the opamp and the feedback network (R12 and C10); C12 and HIGH pot still connect to the opamp output.)

[dschwartz]

I couldn't resist and simulated the cabsim section.
It's a delicate balance between the twin tees but i have some observations..
The gain at the high peak is 24dB...looks like it's too much. Are you intending to clip the highs? The following "passive" twin tee will reduce the harshness..
The middle active twin tee doesn't do much..looks like a mid boost, but with the values shown it gets buried by the treble boost..with some tweaks i got it to boost 2khz and make it resemble a celestion v30. But you have to change everything because it alters the balance..
Really nice simple concept!

[Rob Strand]

The gain at the high peak is 24dB...looks like it's too much. Are you intending to clip the highs? The following "passive" twin tee will reduce the harshness..

Without the peak, the high-end is a bit like the BlackStar HT5.   The low-end also has some similarity with the BlackStar HT5.  The ASTROSIM has more lows.   The circuits themselves are quite different.