Vintage Headphone repair, help needed

I have some vintage Superex Stereophones, model Pro B-VI (with a google search only find an ad in a paper dated 1973 referencing them). They have both a tweeter and a woofer in each ear, and I believe the resistors in the crossovers have gone bad. The high end drops out now and then to pop back in after a short while or after a minor volume adjustment - other than that the volume is crystal clear. Am I right in assuming the resistors could be the issue? The other components in the crossovers are just inductor coils, which are know are for the low pass, so it can't be those. I know instructables isn't a electronics repair forum, but I wasn't too sure of where else I could ask and find knowledgeable people. I love this site. :) I.W.

Posted by incredibleweirdo 10 years ago


Tweeters in DIY project

Hello everybody of the instructable community, I am currently doing a DIY project including speakers but I was wondering if there was anyway I could use only a tweeter as a speaker and was wondering how to wire it and I am new to speakers but good at wiring, soldering, and understanding diagrams. If you guys can help plz reply. -TECHNOMAN888

Posted by technoman888 5 years ago


Set of dome tweeters (Too high wattage)

I have a set of dome tweeters that ran grwat on an old amp i had, thing blew out a few years ago, and just barely runs through another amp with the crossover and woofer. there is some jumpers in the crossover that say Tweeter attenuation -4dB stock setting --- -2dB 0dB Just as i put it right there. I want to know what attenuation means and how i can use the same amount of power into the tweeter, but make it louder. (It's pretty quiet.) Right now it is set at -2dB. Except the dB and numbers are lined up.

Posted by Yerboogieman 9 years ago


Another Question (Sigh)

Does anyone know why a tweeter in "my" speaker would cut out at high volume? It's a problem with my left speaker where when I turn it up past -16db the tweeter cuts off randomly, while the rest of the speaker is still keeping up, I know it's not the stereo. Is the tweeter pouched or is one of the caps on the filter board inside screwed? -Punk

Posted by Punkguyta 11 years ago


How personalizations censor information on the Web

Some sites use software to analyze the information that we search for. A downside to this personalization is the amount of information that it is left out. Any opinions?

Posted by blkhawk 5 years ago


Help Wiring my AMP for Homemade Speakers?!

Hi guys, please take a look at the image below and try to answer these questions for me please, it will be greatly appreciated and you will be mentioned in the credits of my final instructable when its made. 1. How many Watts Per Channel is it? 2. What does it mean by A+B? ie. Does it mean connecting 4 speakers? 3. Could I wire a Subwoofer crossing over the Right + to Left - Terminals? Finally, I'm going to have a 10" Sub with two tweeters wired up. Should I wire each tweeter to Left and right? Im also going to wire in an L-Pad for the Sub. Thanks a lot guys!

Posted by wizzywoo 5 years ago


Question about how-to video

I made a video in the spring, how to ice a cake and posted it on our business FB page. There is a *discreet* website at the end as well as 'find us on Tweeter and FB'. I'm wondering if I could/should upload this same video for a cake decorating Instructable, or will people consider it  spammy?  I can go in and edit it out, but that would take 10 minutes away from my next potential Instructable, lol! Would love some opinions... :) Thanks!

Posted by jessandstavro 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


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


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


Mp3 Module

Hi  I am new on here, and am looking into making a bluetooth speaker/ radio/usb sd reader. i have attached a picture of the module i would like to use. I am wondering if any one has used this product or similar and if the have any help or advice it would be greatly appreciated. The board will be run off a 12v dc battery, and i am hoping to connect it to 2 mid range drivers and 2 tweeters.  I have tried to find a simple wiring diagram with no luck. Just after any advice on what i would need to purchase alongside the board with regards to electrical connectors, cross overs, capacitors, a separate amplifier board perhaps? Many thanks in advance. Jon

Posted by wiseboy5 2 years ago


Finding speaker specs based on case design

I know there are a handful of Thiel/Small calculators to build a box, but what I am looking for is a way to find which speaker specs would fit into a particular dimension of a design. What is that ONE thing that really determines the size of the casing. Is it Vas, Qts or something else. So for example, I want to build a small portable bluetooth stereo speaker with dimensions of length - 6inch, height-3inch, depth-2inch. So if I am looking at speaker datasheets(suppose full range), can I get a rough idea that I can use it in such a type of casing. Mind you there would be two of those speakers. And as a sidenote, what about if there are tweeters, woofers, etc.

Posted by arjunmenon 4 years ago


100 watt sub woofer amp

I'm looking for or to make a 100 watt amp, I can't seem to find any. If you know where i can find one online or a schematic to build one please let me know! Also is it possible to resist or lower the amps from an amplifier or will I have to specifically get a 30 watt amp for the mid range speaker. I am attempting an "led music box on steroids" project hahaha.... basically what I am going to do is make a clear plastic box and put leds and speakers and a 6" sub in it. Kinda bored and looking for a fun project and this came to mind. I'm open to any suggestions to make it better or ideas on how to power the speakers. Thank you in advance! The sub woofer I'm looking to power http://www.electronix.com/100-watt-woofer-speaker-ohm-p-13521.html and the mid range speaker http://www.electronix.com/30-watt-midrange-speaker-p-13507.html Might think about putting a tweeter in too

Posted by zcm87 6 years ago


Jobmate cordless screwdriver

Hey guys!!! Long time no see, I have been busy doing other things in my life and coming to check on here completely slipped my mind, I feel so bad now after seeing how many comments I've missed out on replying on. Also, I noticed some people around here have a PRO beside their name, what is that about? Anyways I have a question I wanted to ask. I bought this handy little cordless screwdriver at a yard sale yesturday, and got it home, plugged it in to charge, and it seemed to be holding a good charge, I used it to change some tweeters in my tower speakers, it has good torque, and good speed. Overall, for $1 I was happy with my find while out on my little adventures. Well, I went to use it this afternoon, and it was dead :( Apparently the Ni-Cads are toast. The problem here is, theres only one screw in the side of the unit, and it only lets me pry half of it open, I can't get the top off of it, there seems to be two metal tubes holding the top on. Does anyone have any idea how I'd pop this thing open?? I want to see about replacing the two cells inside with some rechargeable energizer AA's I have, would I not be able to charge them with the built in charger?? They are NiMh however..

Posted by Punkguyta 9 years ago


Birding Challenge - my first official act

Oh, looky looky! It's great what sort of things you can get up to when you're in the same room as the people who sign the cheques*! Actually, to be honest, this was Noah's idea, but he wanted somebody that cared about the subject to do the donkey work. So, announcing my first actual official Instructables Challenge! Autumn is the bird-spotters’ peak season, and the time that garden birders prepare their garden for the next seasons’ bird activity, so to launch our new Birding Channel, we’ve put together some awesome prizes to reward your birding-related projects, be they equipment you make or modify, projects for the back-garden birder, or you’re passing on the essential skills and insider tips of birding. It would also be interesting to see what software tools or apps you could create to use in the field. As a guide, I'm after something a little bit beyond a bird feeder.  Feel free to enter those, but I'd like folk to stretch themselves a bit. For instance, I am, personally, very tone deaf (and I know a few older birders that are losing their hearing altogether) - can you create an app that would help me identify birds by their calls? Or is there something cool that you've done to your birding kit, and other birders try and copy? Or maybe you have a particular way of ensuring great photographs of birds in the open? There are hundreds of dollars' worth of birding equipment at stake here. Oh, and I'd appreciate those bloggers and tweeters out there to highlight the challenge as well - the more entries we get, the bigger the prizes get. (Look how excited I got - I used bigger font all the way through!) *Ha, that upset this American spell-checker!

Posted by Kiteman 6 years ago


help building a mobile juke box

Hi it would be cool to get some help and ideas with my project to build a mobile juke box, the main part of this idea is that it needs to be low powered as a lot of the time there will be no electric supply, we like to have partys in fields and on the beach  so im thinking it will be better to have a 12 volt system that can run of leisure battery's ive got two 120amp leisure battery's in my t4 van  and when thats not going to be available to use i have a spare 120 amp leisure battery that i could put in the bottom of the jukebox but i have no idea at the moment of how long that would run the system. im thinking the system would comprise of car speakers one 12 inch sub one 10 inch sub two or four 6 by 9 speakers two or for 6 inch speakers two tweeters an amp or two to run everything raspberry pi b+ about a 10 to 15 inch screen some funky led lighting i would love to have some juke box software for the retroness and it would make this easy for some of the less techy not sure if that possible on the raspberry pi? one of the ideas ive had is, as well as having some basic controls (i dont want a full keyboard)  having some 'genre panic buttons'  basically when everyones had enough of putting tunes on (too drunk!) you can hit a genre panic button and the juke box will play on its own, so far the only way i can think to do this is to have a harddrive with several partitions on with music pre installed into the own genres that the jukebox will shuffle and play when one of the buttons is hit, but i have no idea how to get the partition to play by hitting a button though. any input or ideas to help me get my head around this would be fantastic :) thanks

Posted by AbleArcher83 3 years ago


Need help with making an amplifier

First of all I am only considering to make this amplifier I have not gone out and brought any parts yet although I have had a look around. If all goes well I will post an instructable of all the stages required to construct the amplifier.  I am looking to make an amplifier to be used with my computer and various other devices. This is the amplifier schematics I have had my eyes on.. I am new to all of this really but Ive been trying hard and eager to get this working.  Amplifier http://www.circuitstoday.com/2-x-60-w-audio-amplifier-circuit  I have designed this on Eagle PCB, need to double check the connections. Would be useful for some info on the width of the tracks as this was the element I was most unsure about. I am new to Eagle PCB so im not familiar with standard conventions and tricks.  Pre-Amp http://www.circuitstoday.com/passive-tone-control-circuit I have designed this on Eagle PCB, on a separate board again need to double check the connections.  Power supply  I Have got a basic 35v+/- dc supply schematic, it is based on a toroidal transformer, will probably need a inrush current circuit doing later. I have added the power supply components on the same board as the main amplification stage.  Frequency Crossover I have an idea of what I want to use, I was think a 2 way 2nd order Linkwitz Riley filter because I dont want some of the areas of the midrange to be lost, from what Ive seen on graphs, the low pass and high pass dip significantly closer to the crossover frequency. Ive selected some drivers that I liked. The tweeter has an impedance of 8ohms and a frequency response from 1.6khz to 20khz. The woofer has an impedance of 8ohms and a frequency response from 30hz to 4hkz. I read somewhere that it was ideal to crossover exactly in between the two i.e 2.8khz, let me know if you think otherwise.  Also Ive read up a bit on L-pads, would it be suitable/ worthwhile in this application? is it necessary to have the impedance seen by the amplifier constant, if so where it be? Ive looked up the components on a website supplying crossover and audio devices, there are many types of inductors and capacitors I am not entirely sure which type would be most suitable.  If somebody could help me out in designing the amplifier and understanding how all the circuits could come together I would really appreciate it. I  would definitely do an instructable of the construction of all the stages of this amplifier. Thanks in advance. 

Posted by Jarez Patel 6 years ago