Aurora 9 bar Kit & Custom PCB for Sell

Aurora 9 bar Kit and PCB are now available for sell. ******* Prices are reduced ******* Aurora 9 bar custom PCB price is $7.50 + $2 shipping for US address. The kit is also available at $25 + $5 shipping for US address. All parts except Molex connectors and power supply are included. Kit Contents (as pictured) 16x 120 Ohm (0603) 21x 1k Ohm (0603) 1x 10k Ohm (0603) 2x 1uF (0603) 1x 10uF (1206) 1x AP7333-33 or AP7313-33 (3.3V linear voltage regulator) 3x MMBT2907A or equivalent PNP transistor 12x MMBT2222A or equivalent NPN transistor 1x PIC24F08KA101 (SSOP) 10x 5mm Tricolor LED (common-cathode) 1x 5-way Tactile Switch Notes The PIC microcontroller is not pre-programmed. You need your own programmer to program the PIC microcontroller. The kit is also available with water clear LEDs instead of diffused type shown. Please specify if you want water clear LEDs (Special: $1 less for the water clear LEDs). The kit comes with one extra LED. Power connection cable (see the picture) - optional is available at $2 extra. (International shipping is $17) To place an order, please go to my blog page - You will find purchase buttons. Please view my Instructable for the detailed information on Aurora 9 bar. Contact me if you have any questions. <br>

Posted by ledartist 7 years ago

d2822 headphone amp build

I have a d2822 op amp and i want to make a headphone pocket amp out of it but i dont know how to wire it. can anyone help?

Posted by heyytraviss 7 years ago

20 watt PA amp transformers.

Today I bought a 20 watt PA amp at a garage sale for 5$, and there were 2 big transformers in there. Any ideas of what I could make?

Posted by mrbubl3s 7 years ago

10W audio amp?

Ok, so i want to get this one audio amp to work, but i can't seem to figure out how to wire it! the first picture is a schematic, and i have NO idea what the connections are, 1, 2, and 3 the second is a picture of the amplifier chip

Posted by Sandisk1duo 9 years ago

What amp would fit these speakers?

I'm looking to buy an amp to hook some speakers up to but I don't know the specifics of what I should be looking for. I'd like to get it from a store and know what to get ahead of time. The speakers are two combo woofers/tweeters and rated at 200w peak power and 4ohms. How many watts should the amp be? The amp needs to take bare red/black water, have a 3.5mm line in, and plug into the wall. This isn't going to be part of a big home theater system, just a little unit so what would be a good cost of a low end amp? Thanks for the help.

Posted by Ronmarru 6 years ago

What amp would fit these speakers?

I'm looking to buy an amp to hook some speakers up to but I don't know the specifics of what I should be looking for. I'd like to get it from a store and know what to get ahead of time. The speakers are two combo woofers/tweeters and rated at 200w peak power and 4ohms. How many watts should the amp be? The amp needs to take bare red/black water, have a 3.5mm line in, and plug into the wall. This isn't going to be part of a big home theater system, just a little unit so what would be a good cost of a low end amp? Thanks for the help.

Posted by Ronmarru 6 years ago

Is this bridgable?

I've got the amp of a jvc mini componant stereo that came with these gigatube speakers which where 3 way enclosures with a subwoofer in each. This amp would probably work better for my subwoofer I have now but I wanted to know if it is in any way possible to bridge the sub outputs of the amp so I can have a more powerful single channel.

Posted by Punkguyta 10 years ago


Hi, I'm trying to build Ruby guitar amp for my brother, but my problem is that I can't find this MPF102 transistor or any of its equivalents where I live. and if I order it online it will cost me as much as a Marshall amp costs. I will appreciate any help or suggestions whether to replace the transistor or modifying the circuit.

Posted by soranblue 12 months ago

help with fixing stereo amp

Iv had a few problems trying to fix an amp iv got ...there is no obvious problems/problem with it iv tested the thing the best i can ....transistors on out put capacitors diodes and all are ok... the heat sink gets hot to the touch when there is a signal passed through but not any sound comes out . its a sansui amp ax510 iv got a few pics attached ...there is two or three relays in side one on power in and as a speaker protection and iv got a felling that this may be engaged due to a fault .. im not to sure on testing relays iv never had to do it b4 .... iv used a multimeter across it and is showing that a signal not to sure if its a good or bad thing though

Posted by andybuda 8 years ago

does anyone have a schematic for a smokey guitar amp/

I've herd the sound and realy like it but just cant bring mself to spend 30 dollars or more for a circut I cold probable make for under 5. Also, has ayone gotten one of those Vox AC30 headphone amps? I'd like to make one of thos too

Posted by spike shadows (secret agent man) 10 years ago

more powerful, portable amp

I was messing around with some op-amps, building variations of the CMoy amp, etc. But I became depressed quickly -- these ICs' data sheets say that at the safe maximum of 15 volts, they can only pump out around 1/4 watt of power on a single channel! Well, i have a full range driver that really needs more power to sound decent. I was wondering what the normal way of constructing an amp would be if I were looking for 5 to 10 watts of power. *edit*: i'm not looking to run this thing off of batteries... i'm sure at 10 watts, a couple of D cells would get drained rather quickly... I recently cracked open an old 4.1 computer sound system (by microlabs) and scrapped the 5 drivers (4 satellites and a 5 inch sub), two big 3700 uF caps, and two JRC4558D dual op-amp ICs from the amplifier. I read up on the JRC chip (actually, just the data sheet from the RC5448D, the texas instruments flavor, i guess the JRC is discontinued) and it seems that this thing only puts out a max of 200 mW per channel, and typically around 90 mW. Ok i know those speakers didn't get THAT loud without distortion, but i am CERTAIN it was more than 800 mW for those 4 satellites. I am a new computer engineering student, so i can understand the physics behind the electronics, but i am nowhere near the level to start reverse-engineering that amp board. So how did these speakers get driven so hard? THANKS for reading!!!!!

Posted by samurai1200 10 years ago

Yellow Fever

I'm peturbed, even that more at the quick flagging response, yet no help to my situation, regardless I'll ignore that. My mirage panel amp uses IRF640 mosfet transistors, and I did something to it in the process of trying to take an amperage reading with my multimeter between the two energized heatsinks (theres two mosfets for a mono output), after the big FLASH BANG, I pulled it apart after ripping the cord out of the wall. The only damage I can find is a small black pit that the spark made in the metal heatsink (actually it was pretty deep for a spark pit). I've checked the mosfet transistors, included cleaning the MASSIVE amount of ceramic thermal paste they smeared on there with some rubbing alch to get a nice clean surface on the heat sink and transistor. By the way, would arctic silver be a good substitute for the crap paste they put on there? They're designed to make contact with the heatsink anyways so I don't see why silver thermal paste would hurt it. But besides all that, I can't find any brown spots on the PCB or any bulging capacitors (there's only two main power caps), did I perhaps just flip some kind of internal circuit breaker built into the circuit as a whole, not just as a single device I can see? I'm wondering if I should just chuck it instead of putting it back together and plugging it back in to be greeted with another spark, although it didn't smoke or anything while it was plugged in after the spark, but I got a quiet humming sound on the sub and the music stopped coming through. Again, maybe I blew some kind of breaker? Oh and I know it's my fault guys, so don't be rubbing that in my face, I come here only for help and not to be a nuisance.

Posted by Punkguyta 10 years ago

Weeding with Style

Not bad. <br>

Posted by AngryRedhead 7 years ago

Need help wiring headphone amp

I ordered this amp and I'm not entirely sure how to wire it up. I have a decent guess on how to do it but I'm not entirely sure. Help is appreciated, thanks.

Posted by beckertastic 3 years ago

Need Help With Amp Instilation

I recently aquired a Infinity 311a Amp and am wanting to install it on a 1994 Chevy Silverado 2500. i can get any wiring i will need i just dont know what to start with  

Posted by torquerat 5 years ago

Steampunk Guitar Amp

I tried playing guitar a while back and never kept it up after my buddy took his tube amp back that he had been lending me. Everything sounded so bad on the little one I had left. But if I had one of these I would've never stopped. Steampunk Guitar Amp

Posted by fungus amungus 9 years ago

Guitar amp doesnt play sound in headphones when pluged in.

Hello, so I have a Orange amp, the crush 20 rt model and it plays just fine. When i want to play the sound to the headbphones it doesn't play. There is amp amp plug and the headphones plug, next to the headphones is the aux where i plug my headphones, but when i play, the sound doesn't go to the headphones. Any solutions? Also sorry if there are any mistakes in my engrish.

Posted by BacharH 1 year ago

Seems it is possible to blow an amp

Well, apparently something is wrong with my sub amp, not the sub itself, at least it doesn't sound blown to me. But it definatly does sound different than last time I used it and there is a slight growling sound you can barely hear if you turn it up to a certain point, almost like the voice coil rubbing but a softer sound as I do know what that sounds like. Time to chuck the amp eh?

Posted by Punkguyta 10 years ago

DIY Ipod Amp Kits

I have all put together all the parts to make your own iPod Amp as seen in ReadyMade magazine issue 23 and Instructables.The kit includes:Velleman Amp kitSpeakerArmy Surplus Case1/8" Stereo JackWireLEDResistorNuts and Bolts to secure speakerPower Switch6AA Battery Holder w/ snap connectorThe price is $45 + $5 for shipping. You can follow the step by step instructions at:,-JoeYou must pay with paypal and I will only ship to the US, sorry I just end up losing money any other way.

Posted by joe 10 years ago

ideas for homemade audio amplifier?

I was interested in pursuing the Bike Stereo instructable but I would rather not buy the $30 amp. What are the general ideas behind making decent-quality amplifiers for speakers? I have limited theoretical/practical experience with op-amps and I'm struggling to apply these ideas to a stereo system. Any thoughts?

Posted by post.haste 9 years ago

Help with homemade amp and speakers

Hello, I am a complete "noob" when it comes to electronics. I do not have an Ipod. I want to make that clear. I want to make a set of speakers and an amplifier for my truck. please dont ask me what voltage or anything else like that because i have no clue. I want them to be loud. and cheap.

Posted by ledzep567 10 years ago

making a tube amp from an old, working, tube powered stereo

Hi- So I scored an old stereo from a friend that works- everything but the turntable anyway. i want to convert it into a guitar amp, but other than +/- i don't have any electrical knowledge.  looking for any tips advice on the easiest way to go...  i can post pics if needed.  in my head: taking the input for the turntable or something like that then wiring a 1/4" input for a guitar somewhere.  is that possible?  i've looked at most of the tube amp instructables & am not finding what i really want.  any help would be appreciated!  i can follow instructions well, just not sure what to do, and don't wanna get into something way over my head!!! THANKS! brandon

Posted by greezus 7 years ago


Potentiometer ARCING inside :( Anybody know what's going on  ? I'm using a 100k to control a 50k ohm load . i smell lots of smoke . It's a LM386 with pots at the output section to a 8W power amp .

Posted by Thereyouhaveit 7 years ago

Bluetooth amp add buttons and how to place them?

Can someone give me some advice? I am going to buy this mini amp.;=1∣=A29EZVB447EKA7 I want to add some buttons like play and skip, how can I do it? What kind of battery can i  this?Int to make it portable.  Another question: I am looking all over the place but can't find small play and skip buttons. Can someone help me?

Posted by trekdrop 2 years ago

Guitar Headphones

Im in need of help. My friend has a bass guitar but no amp. And instead of buying one he asked me to figure out a way to let him just plug in his headphones. After glancing around at all the instructables for portable guitar amps I hadnt seen one for just plugging in headphones. SO, I'm asking here in hopes of someone else knowing where an instructable is for this, because I can't find one.

Posted by Robo51 8 years ago

voltmeter and ammeter

Hi guys, could someone help me with this thing,

Posted by mammotz 6 years ago

Crate GT15R Personal Lead Amp 15 Watts with Reverb

I have a brand new Crate GT15R 15 watt amp for sale, I bought it to use with my cigar box guitar, but have gotten too busy to play much. I've only used it about 5-8 times, it works perfectly.This rugged amplifier combines outstanding features with serious clean and distorted sounds. A Reverb control is provided for greater flexibility. RCA input jacks allow connection of a CD or tape player for playing along with your favorite music, and the Headphones jack lets you practice in private.I am asking for $85I will set up the sale on Ebay, pay with paypal.PM me please.

Posted by bumpus 9 years ago

Resistors for a project, easy question!

Hi all, This is an easy question about resistors, its been years since I use any. So, I have a replay which is rate 12v DC and 2amp. The power supply is 12v DC and 6 amp. V = I X R R =  V / I so R = 12 / 2 = 6ohm So I need a 6ohm resistor? Is that correct? I can't believe I have forgotten this! thanks Gary

Posted by garynobles 5 years ago

audio amplifier don't understand wire schematic :/   the one i am having trouble understanding is the 20 gain amplifier

Posted by pattyshaw 6 years ago

Tube amplifier schematic

Does anyone have a schematic for a stereo tube amplifier, I just acquired a large quantity of tubes, a tube tester and some other assorted electronics from my grandfather. Ive always wanted to make a nice tube amp, now all i need is direction. It will be another 2 weeks or so before I can actually pick them up and start testing them so I was just trying to find some schematics to get me in the right direction. I figure this may even make a nice first instructable as long as im not completely lost in the schematic. Thanks smoke

Posted by smoke 10 years ago

help to remember what im doing

The pic says it all lol. i can remember for the life of me where i am to solder the bass pickups to and where the out put goes to lol. ANY HELP PLEASE *begs on floor kissing feet*

Posted by joypad 5 years ago

8 Watt Guitar Amp Help

I've been fartin around with electric and acoustic guitars for about the past 5 years. Only now am i getting decent (by no means good, but better, i guess...). I've been wanting to make a small amp with a small speaker for some time now.I saw this circuit the other day. Its VERY simple. says to reverse the values of R1 and R3 for use as a guitar amp. there's some other stuff too. I was going to see if i could pick the stuff up at radioshack tomorrow, and maybe make it an after-work project for the week. Maybe cut up some wood and make a nice box for it. 1)Do you think these parts would be available at radioshack? and what do i need to look for if i cant find the exact IC? 2)Any special soldering tips? 3)What kind of pot do i need to add, and where, for a volume knob?4)Is there any extra things you think that needs to be added?5)Are those triangle things grounds? as in 12v negative? And what about the other wire from the guitar? 6)Also, what ohmage speaker do i need to use? What am i looking for in a speaker?7)Will 8 AA batteries do the job?8)Do i need to add like a fuse or something somewhere? Going straight into the IC...i dont know. If anyone knows of simpler or better designs, let me know. I seem to really [insert proper four-letter word here] up electronic things. I think thats all the questions i have here. To respond you can just go like..1)i think that. Hopefully that will make it easier to answer all my ignorant questions.Thank you!Jason(sorry if i seem like a a$$ here. Its 1:35am, I've been looking this stuff up for two hours, and i dont feel like i got any further....)And since i dont have a suitable picture, have yourself a look at my LEGO steam engine: (after the third try of trying to post the video with unsuccessful results, i realized that i was posting the embed code int eh URL place...need....sleep....)

Posted by John Smith 10 years ago

MP3 unit for car

Hi everyone, I was wondering if I could get some help with a project I'd like to make. My truck's stereo died, and instead of getting another stereo, I'd like to make a unit that just uses my MP3 player. Junkyard stereos are of dubious condition, and usually overpriced, and I'm too cheap to pay for a new stereo. I never really used the radio or CD player on the old unit; I just want basically a jack for a MP3 player/laptop, volume control, and power switch, powered by 12V and able to be hooked up to 4 speakers. I have some basic electronic knowledge, but not enough to make something like this. Could someone maybe, possibly, provide me with a diagram or ideas to get this started? Thanks a lot!

Posted by Braunchitis 8 years ago

Aurora mini 18 Kit and PCB

*** Back in of stock now!!! Thank you for waiting! *** The kit is also available at $29. All parts except Molex connectors and power supply are included. Shipping is $5 for USA, $17 for the rest of the world. Kit Contents (as pictured) 1x PCB 1x 10k Ohm (0603) 3x 220 Ohm (0603) 3x 2.2k Ohm (0603) 18x 150 Ohm (0603) 2x 0.1uF (0603) 2x 10uF (1206) 3x MMBT2907A 1x PIC24FV16KA302 (SS) 19x Tricolor LED (common-cathode) 1x Tactile Switch Notes The PIC microcontroller is not pre-programmed. You need your own programmer such as PICKit 3, ICD 2, ICD3 to program the PIC microcontroller. (PICKit 2 does not work) The kit is also available with water clear LEDs instead of diffused type shown. Please specify if you want water clear LEDs (Special: $1 less for the water clear LEDs). The kit comes with one extra LED. Power connection cable (see the picture) - optional is available at $2 extra. PCB only Aurora mini 18 custom PCB price is $9.50. Shipping is $5 for USA, $17 for the rest of the world. To purchase please go to my site - Please view my Instructable for the detailed information on Aurora mini 18. Contact me if you have any questions. <br>

Posted by ledartist 6 years ago

Float Your Boat Challenge

<br /> [BCITSA YouTube Chanel] Recently, the BCIT Student Association (BCITSA) hosted a 2-day 'Float Your Boat' competition for the Marine Engineering Students at the Marine Campus in North Vancouver. Contestants were supplied with ‘surprise’ materials to construct their vessels with; materials included plastic garbage bags, popsicle sticks, bamboo skewers, aluminum foil, string, plastic party cups and tape. Teams of 2-3 were given an hour to become acquainted with the surprise materials, then design and construct a sea-worthy vessel. Boats were then raced in heats on the indoor pool, using human-powered fans for wind, to determine who had the fastest time. Prizes were awarded for: Fastest Boat, Most Creative Team and Best Overall Design, all donated by local businesses. I attended just to check out the scene, but the event was also covered by local news media and has since been broadcast on stations in Metro Vancouver, as well as printed publications. Pretty awesome for a low-budget student association! And there's more, the BCITSA has a history of hosting awesome events for students, such as: 3rd Annual Flying Extravaganza, where students at the Aerospace Campus in Richmond, BC "construct planes from everyday office supplies, with the winners chosen based on the distance they can safely land their lego pilots. Additional prizes go to those with best design and best crash." CTV News coverage (youtube video) Engineering Week, hosted at the BCIT Main Campus in Burnaby, BC, where electronic, mechanical and civil engineers compete in tower building, catapult destruction and racing CO2 powered cars, all made from everyday office supplies. As well as the competition Engineering Students brought along projects they have been working on to share with their fellow students, there was even a real live Angry Birds game being played. CityTV News coverage (youtube video) Facebook photos Aside from a much needed break from studies, challenges like these put on by the BCITSA pushes students use creative solutions learned in class with hands-on problem solving, turning academics into tangible results.

Posted by mikeasaurus 7 years ago

Limiting Amps on My power supply

I have a PSU that is capable of 45 amps, but I only need 10 amps. How to I limit the amps? I am using the psu to make chlorate.

Posted by tylerb 10 years ago

Power Amp Build?

I was wondering if there is anyway to turn a set of old computer speakers (the amp inside the computer speakers more particularly) into a power amp? I know it would be a pretty pathetic power amp but I was wondering how I could do it.

Posted by batboy61490 7 years ago

Amp For Sale

AmpYeah yeah, blatant plug, blah, blah, blah..:D

Posted by bumpus 9 years ago

Mini Amp

I have a old pair of headphones and i was wondering is there any way i could power the speakers from the head phones and plug it into my guitar to use as a mini amp ?

Posted by jonathanbud 10 years ago

Could this be used as a guitar amp or converted into one?

Http://;=STRK:MEWAX:IT&item;=190311640003Could I convert that into a guitar amp? Im thinking that because its mono and not stereo it should work fine? Any thoughts or suggestions?

Posted by jackillac92 9 years ago

Choosing a good bass amp

I need suggestions for a good bass guitar amp. One I have in mind is a Behringer Ultrabass BA115 600 Watt 1x15 Bass Cabinet. I'm looking for something good at around $150 USD. Any advice for choosing one would be nice too.

Posted by wingman246 10 years ago

$ altoids amp (penguin mints amp) $

Hey guys, i was wanting to make an altoids amp however i noticed the instructable up at the moment isnt the most descriptive or has the best photos. so i am asking for someone to make an instructable so that even me, can make one. i am ok with simple electronics and will persevere until i get the desired result . the poster should have a decent camera (for macro images) and describe the components and what they do. i will offer a cash reward for the poster (a whole $10!). thanks alot Cew27

Posted by Cew27 9 years ago

Do I need an amp for my record player?

I have a record player and a set of speakers and I guess I need an amp, so I went to the pawn shop and the guy told me I need one with Phono. He had a couple for abou $120. Is that necessary/a rip off?

Posted by evml1 6 years ago


Hi Im new to the site and it is awesome Can someone tell me where in a speaker /radio/walkman is the amplifier as I really want to make one for a project Can you tell me how can I salvage an amp to make an Altoids amp powered by a 9V Thanks a lot

Posted by B_qwerty 6 years ago

heavier duty pocket amplifier

I was in need of a pocket sized powered amplifier, so I made this:, I need to run larger speakers off of it, 6.5" woofers, and I need to get decent sound out of it. When I ran more power through my pocket amp (6v. battery pack rather than 3v.) I fried the circuit and had to make a new one. Any suggestions for a pocket sized, powered amplifier that can power said speakers? the amp and battery pack must be concealable in a suit.

Posted by imanalchemist 10 years ago

Speaker and Amplifier Wiring Please Help!

As you can see I have a car amp and some speakers, can anyone with speaker or amp knowledge please tell me (or even better draw a diagram :D) of the best (most efficient / loudest) way to wire all these up, the specs are as follows… AMP 2/1 channel amplifier Max power – 400 watt 4 ohm stereo – 2 x 75 watts RMS 2 ohm stereo – 2 x 100 watts RMS ROUND SPEAKERS (midwoofers) 4 ohm 25 watt RECTANGE SPEAKERS (tweeters) 4 ohm 4 watt Thanks for your help! (P.S my plan is to build a portable sound system powered by a car battery)

Posted by superrob 6 years ago

Little Gem Amp Problem

Hi all I am quite new to electronics but I am very interested in it. I have built a couple circuits before but nothing with an IC chip. So now I have decided to move onto slightly more complex projects,  and I found the Little Gem Guitar Amp: I have built it on a veroboard from these diagrams but I changed the layout slightly. Obviously everything is connected the same way I just moved the 100uF cap a little up. I have also added a 10Ohm resistor to the output and used headphones instead of the speaker. When I connect the 9V battery, without an audio source, I can hear is a soft buzz, quite a high frequency. The gain pot makes the noise louder and softer so I assume the LM386N-1 chip is fine. If I put my finger on the ground part of the 1/4 inch jack, the noise become much loader and lower frequency. The same thing happens if I connect an audio source. Is there an obvious cause for this problem that I don't know about? I have connected the jack to the board with shielded twin core wire. I have used the shield as ground and the core as signal. Is this correct? Any help would be appreciated, I would like to get this working.

Posted by geniass 7 years ago

question about thermal fuses

I have a blown thermal fuse in one of my fog machines,it is 10 amp 250 volt 133 degrees c.can i by pass it safely?(there is high temp limit switch on heating element)or can anyone tell me where i can get one or its equivalent?i found some online but they in thailand.hoping someone who knows more than me can tell me where to get this locally.the blown fuse has some numbers on it :se fuse sf129 e tf 133 degrees c please help

Posted by hvacmac 8 years ago

Vacuum tube amp help

I just bought a lot of 125 vacuum tubes on ebay for 30 dollars including shipping (the seller didn't list what tubes were there, just said a crate) I got the following (if the same name is listed 2 times in a row, then I got 2): 10JA8 12AD6 12AE6 12AF6 12AU6 12AX4GTA 12BD6 12BE6 12BG6 12C5 12CN5 12CU6 12J8 12K7GT 12RS 12X4 17AX4GT 17BR3 18FW6 18FX6 18FY6 1B3GT 1G3GT 1G3GT 1S4 1S4 1S5 1T4 1U5 1U5 1X2B 21LR8 2BN4 2BN4A 2CW4 2CY5 32ET5 3S4 3S4 3V4 4BQ7A 4BZ6 4BZ7 4BZ7 50B5 5AT8 5AT8 5AT8 5AT8 5BR8 5T8 5T8 5T8 5T8 5U8 5U8 5U8 5U8 654A 6AB4 6AF4A 6AG5 6AG5 6AL5 6AL5 6AM8 6AQ5 6AQ5A 6AS8 6AT6A 6AU6A 6AU6A 6AU6A 6AV6 6AV6 6AX4GTB 6BA6 6BA6 6BA6 6BA6 6BA6 6BE6 6BE6 6BJ6 6BK7B 6BN4A 6BN4A 6BN6 6BQ7A 6BQ7A 6BQ7A 6BQ7A 6BQ7A 6BU8 6BZ7 6BZ7 6BZ7 6BZT 6CB6 6CB6A 6CF6 6CG8A 6CN7 6CY5 6CY7 6CY7 6CY7 6DQ6A 6DQ6B 6EA8 6FM7 6GN8 6H6GT 6J6A 6J6A 6J6A 6S4A 6SA7 6SJ7 6SK7GT 6U8 6U8A 8FQ7 9A8 I'm thinking about making a small amp (below 5 watts) for my ipod, which one of these would be best?

Posted by guyfrom7up 9 years ago

smaller outdoor soundsystem

I saw a lot of great instructables that deal with putting together a fairly large soundsystem using a car battery. they are often supported using a shopping cart or a bicycle. are there any instructables that are maybe a step down in size? i'm looking for something a little quieter and more portable. maybe the sound comes from my jacket or a backpack? probably will make use of a megaphone more than big speakers. 

Posted by mrtunes 6 years ago