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Toby E
Posted on Monday, July 30, 2001 - 06:34 pm:   

Hi, is there anybody out there who knows where
i could get schematics to build a siren (i've done
it once with my guitar distortion and it worked out pretty well)...
Jah !

Posted on Friday, August 03, 2001 - 08:50 pm:   

try craig andertons book ' electronic projects for musicians' , it might have something , but its been a while since i read it...

Posted on Friday, August 03, 2001 - 08:59 pm:   

actually i'll just contradict myself , seeing as a siren is a basic synth and not an fx processor it probably wont be in that book , but if you know a bit about soldering etc it shouldnt be too hard to make. its a typical VCO>VCA + LFO set up , and isnt too hard to make , but given that you could build a decent synth with not a lot more you're probably better off doing so , unless of course you want siren sounds only .

Posted on Saturday, August 11, 2001 - 02:13 am:   

I was recently thinking about building a siren myself. I searched the net for instructions but didn't find anything you could use "as is". There are quite a lot of sites around with schematics for synthesizers. But I think these schematics are oversophisticated as they feature temperature compensation which is not necessary for a dub siren. (A siren doesn't have to be in tune..)
I came across some basic schematics which may be useful as a starting point for experiments:

- basic audio frequency oscillator

The next two schematics are taken from a electronics experimentation kit for kids
("Tonhohe" means pitch or frequency, "Lautstärke" means Volume, The "NF-Modul" is a amplifier module that can be used to connect the circuit directly to a speaker. You don't need this since you already have a sound system I guess ;-)

- tunable oscillator

- simple siren - press and release the interrupter "Ta" to let the siren pitch increase and decrease.

I ended up buying a second hand dj-sampler which allows me to use some dancehall-style samples too. So my investigations on how to build a siren ended after that...

If you decide to build your own siren it would be very interesting to know about the circuit you are using for publishing it here.

hope to hear from you again!

Big Up
Daniel aka The Interruptor

Toby E
Posted on Tuesday, August 14, 2001 - 04:40 pm:   

i'll take the notes here and try to do something about them - thanks for the time being ....
I'll report when (and if) i succeed :-)

munky lee
Posted on Thursday, August 23, 2001 - 07:43 pm:   


this is a circuit diagram for a siren.
explications are in french.

there is potentiometers for tone, frequency of oscillation and range of oscillation.
you can modify it to change frequency of oscillation and tone. to do it, change c1 and (or) c2.
you can add a switch selector to put different capacitors, so you will have different possibilities of frequencies.

I just received this circuit, and I'm going to build it as soon as I can. actually in august, most of electronic shops are closed, so I wait september.
I don't have any idea if it sounds goods, but it seems...

munky lee

Posted on Tuesday, October 02, 2001 - 03:42 pm:   

HI all !
i've built the Siren, it works very well,
especially whn you run it through a massive
delay... i'm gonna set up the soundsystem
next friday afternoon on the beach and have
the box with me, jah bless.
If anyone here lives in Israel (which i guess you
don't) contact me via e-mail for more details.

BTW, anyone has more effect schematics ?

The Interruptor
Posted on Wednesday, October 03, 2001 - 04:52 pm:   

Congratulations Toby! Did you use the schematic
supplied by Munky Lee? It would be great if you
could write a small documentation of your siren
(maybe even with pics and realaudio-file).
This would be a big help for other likeminded

Daniel aka The Interruptor

Posted on Friday, October 05, 2001 - 09:18 pm:   

Thanks for the encouragement...
after the gig on the beach next
friday i might sit down, write a few
words, and might even add in some stuff for
you to see/hear.

much respect for Munky Lee & Daniel

munky lee
Posted on Thursday, October 25, 2001 - 01:02 am:   

so tobby,
do you have some pictures, maybe mp3 of my siren I've never built???!!!
the reason why : I actually save some money to buy the russ d. one. lucky me...

mat (aka munky lee)

Posted on Thursday, October 25, 2001 - 11:12 am:   

Toby sent me a report/article about his
siren and an mp3 file some days ago.
I'll publish it here on this site as soon as I
get the pictures he is preparing right now..

Posted on Sunday, October 28, 2001 - 11:53 pm:   

OK. Toby's report with mp3 file and pictures
is now online at


dUBsTA aka zAd
Posted on Thursday, July 10, 2003 - 04:02 pm:   

Hi all,
first of all big up 2 Daniel for setting up this joint , a pretty unique place indeed :)

then I'd like 2 know your opinions on this small idea I've had: a square wave with adjustable frequency (say 0-or-so-to-300 Hz) , to trigger on & off the sounds from your deck ( from only one aux possibly , not the main out :D ) , which is again fed into maybe an echo unit..
The problem is that I'm not that sure on actually how to build this thing... vco>transistor ?

I'll post again here (I'm planning 2 build the siren - thanks Mat for posting it :) ),in the meanwhile shoutz go out to all the true dubheads..


Posted on Thursday, September 11, 2003 - 01:28 am:
can clic in right corner to listen

Posted on Sunday, September 14, 2003 - 08:34 pm:   


i was curious what a "dub siren" was, but it turns out i had already made one on the cheap out of a "magical musical stick", one of those dollar store keyboard sticks. take it apart, pull out the small circuit, snip the pitch resistor and solder in a 500k-ohm potentiometer in series with it, for siren sounds you can pitch down to a fat rumble. solder a switch between the 2 membrane contacts, and you've got a siren. maybe costs about $10, and would take about an hour to make and recase.

i've got mine wired into one of those halloween voicechanger toys, for tone variation. nice, cheap 'n dirty.

Posted on Monday, October 27, 2003 - 04:34 pm:   

Greetings, i wanna know if somebody can give me a schematicpln like this.

For the dub sirene from munky lee?
It would be very nice, me have a little pit problems to read his schematic plan.
It would it be nice if you can send me thi with a list of all Pieces that im need.
Can some body do that please?
Me overstand english an the german language.

Give thanks foryour help

Ras Nibru

Jah Love

H. S.
Posted on Thursday, April 01, 2004 - 07:15 pm:   

I was just wondering how low that siren can be tuned...?

Posted on Friday, April 02, 2004 - 10:41 am:   

H.S.: have you heard the mp3 demo over here?

Steve Subronix
Posted on Tuesday, November 02, 2004 - 05:29 pm:   

I have just constructed a dubsiren from the circuit posted on this site.

It works fine, except if you keep your finger on the button for more than about 20 seconds the signal breaks up and gets nastily, speaker rippingly loud.

Any suggestions to what is going on. I am running it from a 9v battery.

Posted on Sunday, February 27, 2005 - 06:52 pm:   

Yo yo

There is a new manufacture of dub sirens.
You should check out this link -
They have also bunch of other stuff like theramines etc.

Posted on Monday, April 25, 2005 - 10:50 pm:   

Hey everyone,

how's it going?

I built Tobys siren (thanks Toby) and it is making noises but, I can't get P1 to work.

I reckon it could be something to do with the fact that I used 2 ne555s instead of the correct combination of oscillator chips. Any ideas?

I also noticed that on Tobys schematic the output (3) on U1 is marked as present but not connected to anything.

I'll keep yous briefed if I get it working

Take it easy

Posted on Monday, May 16, 2005 - 03:59 pm:   

Hello Dubbers
I'm looking for the "Gerber" CSR file of this siren ,
a technician asked me that for build it .
Can anyone help me ?


Posted on Thursday, May 19, 2005 - 04:17 pm:   

these guys also sell

Posted on Thursday, May 19, 2005 - 04:57 pm:   

Dubterrier: As far as I know "Gerber data" is the layout data for the printed circuit board. (see here) I don't think it's really worth to do this for building one single unit.

Posted on Wednesday, June 01, 2005 - 05:16 pm:   

My friend built me a siren with this schematic, but how to make siren to play from the start when i press trigger button. sound goes in circle(uau-uau..), but when I press,it's not reseting the sound to go from the start, but from somewhwere in the middle.thanks!

Posted on Thursday, June 02, 2005 - 10:56 pm:   

if someone could translate that into english, that would be nice too...some of the words just dont work right when you run them through an online translator, wave becomes beach ...stuff like that etc etc etc...and what do the letters and things on the diagram itself mean

Posted on Saturday, June 04, 2005 - 08:31 pm:   

pete: are you refering to this schematic?
in this case try to discharge capacitor c1 (use a resistor and hold it to both sides of the capacitor). i'm no specialist with analog circuitry but i know that usually a capacitor is charged and discharged to create an oscillation. for a siren there are two oscillators: a fast one that creates the tone and a slow one that modulates it's frequency. in this case c1 seems to be the capacitor of the slow oscillator. it's likely that the start button resets the flipflops, but does not discharge the two capacitors. if discharging it by hand as proposed above works, you could add a separate switch to the circuit just for this purpose.

Posted on Friday, July 15, 2005 - 05:47 pm:   

Greetings dubheads,

Love this board! Give thanks for the work!

My mate built us a siren according to the schematic availabe on this site.

It works really well. May be 3 little things:

- have enought space between the buttons to operate easily.

- a box that is not too light so it hold in place

- a big solid button for the trigger, we used a small one and sometimes you get crackling noises or the siren get stuck on play!

Here my 2 cents on a strictly user point of view :)


Posted on Friday, July 15, 2005 - 06:19 pm:   

Hello again,

I am looking for a bit of advice on the type of echo I should use with the siren.

I have a space echo but i'd like to use it for voice/instruments only and have a separate one for the siren otherwise it get a bit messy.

It sound really good with the tape echo. So i'd like something with a similar sound but a smaller price.

I considered the following options after reading the board:

- line 6 echo park
- headrush AKAI (expensive!)
- boss pedal (not too sure which model - i read that they were a bit rubbish)


- Alesis Nanoverb
- Boss DE-200

Does that sound right?
But I am now a bit lost on what to choose...

Its purely for sound system use.

Any guidance would be really appreciated! Thanks!


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Posted on Thursday, July 28, 2005 - 12:09 am:   

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Global Purpose
Posted on Tuesday, October 04, 2005 - 03:51 am:   

Hi evryone , i suggest You to find the AD 80 IBANEZ delay thats the best one You can find second hand it might make You forget some crap tapefake echoes that need too much cleaning or repairing (not all of them of course!!), this AD 80 is a big deal it s one of my favorite delay stomp box ... it s just "dommage" to use it just for a siren (i dont like siren ...sorry)hehehe
me looking for a simple schematics to use an old accutronics spring tank (8db2c1d) as a spring reverb usable with mixing board and so on...if anyone could help....

Toby E
Posted on Thursday, October 20, 2005 - 11:06 am:   

Yo all !!!

Returning to the board after a few years not visiting it...I'm so happy to learn that some of you were encouraged to build the siren according to the schematics... (I'm really excited)

About resetting the sound (to start from the beginning of the wave when pressing the button), I think it's impossi ble to do without circuit modifications - sorry...).

But now that I'm studing electronic engeneering, I might strat bukilding more quarky effects in the near future...

Toby E

Posted on Wednesday, October 26, 2005 - 01:42 pm:   

I have built somthing
check this link to see it adid=338349&cache=20

Posted on Tuesday, May 02, 2006 - 04:47 pm:   

hi everyone,
thanx to all for this research
i m gonna try to build this siren soon
good to find informations..!
jah love.

Sky Hi Guy
Posted on Sunday, June 18, 2006 - 01:17 pm:   

greetings and thanks,
we build a dub siren using the information on this great site.
and its sound great.
one love, the Sky Hi Guy

Posted on Wednesday, July 05, 2006 - 03:13 pm:   

Thanks to Munky Lee, Toby E ,and The Interruptor .

Sounds great, was really fun building it.

Cheers guys

Posted on Wednesday, July 05, 2006 - 03:25 pm:   


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