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Help with my supplies? Answered

I have 2 units of 4" woofers of 4 Ohms and 25 watt RMS with a frequency response of 40Hz ~ 170Hz 2 Units of 3'' loudspeakers  4 Ohms and 10 Watts RMS with a frequency response of 160Hz ~ 20Khz and these tweeters  Can I make a 3way Speakers with these supplies and if yes please send me the crossover and L Pad schematics. Thanks In Advance

Question by adarshnarsaria    |  last reply


Can Anybody Help me with Audio Terms?

I am on my way to build 3 way speaker system and this my first time. I heard that i have to make crossover into the speakers which will drive the low frequencies to the woofer and mid ranger whereas the low pitch to the woofer. I went to a site that calculates schematics for any sort of crossovers. But they ask me the several things out of them i understood some of them while others made my mind disrupted. so please state the meaning of the following: High Xover Frequency ( fh ) Low Xover Frequency ( fl ) Frequency Spread ( fh/fl )   here there were 2 options I.E, 8:3 octaves and 10:3.4 octaves Bandpass Gain ( g ) Crossover Type In the last one there were several options: 1st Order normal polarity 2nd order reverse polarity 3rd order reverse polarity 3rd order normal polarity 4th order normal polarity What are the differences between these crossovers? Which one is the best and why? If nothing is best so what is the difference? Sorry I am a novice. So guys please be easy on me....  Thanks In Advance :-)

Question by adarshnarsaria    |  last reply


Matching speakers to amplifier

I have purchased 2 Maxamp20 amplifiers (http://store.accusafe.nl/modules/versterkers/maxamp20-met-3-5mm-connector) and i am trying to match speakers to them, i've searched audio forums for information (that i mostly don't understand) and tried asking questions (that have been mostly ignored) and i think i've found appropriate speakers but i want to get a second opinion before i purchase stuff i might not be able to return. i don't have the space for and can't afford the weight requirements of a large enclosure but i want fairly high volume and wide dispersion so im looking at getting 2 of these PA horns (http://www.specotech.com/index.php/products/audio/item/542-spc40rp) to mount on top of a shallow down firing enclosure for 2 of these subs (http://store.accusafe.nl/onderdelen/luidsprekers/subwoofer/dayton-audio-sd215a-88-8-dvc-subwoofer-speaker). i know the subs work with that amplifier because they are used in Boominators (http://www.diyaudio.com/forums/class-d/104402-boominator-another-stab-ultimate-party-machine.html) but i have no idea about the horns. also assuming this setup is okay do i need some kind of filter or crossover (not sure of the difference) to split the sound safely between the midrange and the sub speakers?

Topic by ambientvoid    |  last reply


Is a sealed environment always better for speaker enclosures?

Specifically when dealing with smaller, less powerful speaker. I am aware that certain sub woofers require venting, but I don't know how important sealed boxes are for midrange and tweeter.

Question by Andale_The_Great    |  last reply


4 way spekaers - is the xover schematic correct?

My supplies A Tweeter with a frequency response of 20 KHz ~ 40 KHz, 8Ohms, 75Watts RMS/3000Watts Max, and Sensitivity of 105dB. A 4” Subwoofer with frequency response of 25Hz ~ 160Hz, 4Ohms and 25 Watts RMS Two 4” Full Range Speakers of 4Ohms and 5 Watt RMS Is the schematic mentioned in the pic is a suitable xover for my system please clear the nearest values to me Thanks in Advance

Question by adarshnarsaria    |  last reply


Determining the correct specifications of my subwoofer?

I have purchased a local brand sub-woofer which does not comes with any specifications except the following: Impedance: 4 Ohms Output RMS:20 Watts Frequency Response: 40Hz~170Hz Effective Cone Diameter(D): 4" However i wanted to know the following Equivalent Volume(Vas) Free Air Resonance (Fs) Total Q (Qts) Actual System Q (Qtc) Resonance Frequency (Fb) Is there is any way to determine these Thanks in Advance....

Question by adarshnarsaria    |  last reply


Should I put sound deadening/dampening material in my car?

I've just spend a little over a grand and blown the majority of my budget on new speakers amp wiring and a headunit for my car. I haven't bought any subwoofers. I'm happy to go over this budget if sound deadening will make a large difference. Anyway, I was just wondering- road noise and all of that aside, will sound deadening make my stereo sound noticeably better? As in, sound quality alone Should point out that the speakers are 300 watts rms all up. 6.5" "woofer" 4" midrange and a tweeter that's under an inch each side. Thanks heaps!

Question by pete54321    |  last reply


How can my soundbar be rated at 300W-peak/150W-RMS, amp IC only goes 78W, 5 drivers total 60W?!?

Pyle PSBV200BT. Audio amp IC is STA540. Speakers and marked ratings: Two tweeters @ 10W, 4 Ohm; two midrange @ 5W , 8 Ohm; and one sub-woofer @ 30W, 8 Ohms. PS is 18VAC@2.5A. Am I missing something. The numbers seem so wrong that I must be overlooking something significant, not just overseas marketing greed. The Pyle sounds ok, but my 17-year-old 100W Creative 5.1 PC speakers blow it away.

Question by MarioL111  


How can I stop my guitar amplifier from getting severe radio interfearance?

I have a Peavy Vypyr 15 watt combo modeling guitar amplifier. It has severe radio interfearance and picks a spanish radio staion up and is ver clearly and loudly heard through the amp. I need this amp because without it the other two amps cant get as distorted, as loud, as clear, and they cant pickp the midrange that the vypyr puts out. Is there any way I can sheild, or block it from doing this? ***update*** the second picture shows the exact diagram of the splitter involved in the setup

Question by fastcar123    |  last reply


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

Topic by zcm87    |  last reply


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. 

Topic by Jarez Patel    |  last reply


Surround Sound Help(connection to an Xbox), and my dream media setup

I couldn't decide what forum to put this in(since surround sound could also be a Home thing), but i decided that Music would be best. Basically, I bought a $79 Logitech surround sound system a few weeks ago and hooked it up in my room. For the money, it's pretty awesome. The sound is lacking though, it's fine, but the frequency response is anything but linear. Some songs are more noticeable than others. Either way, I've been looking at the Logitech Z-5500 THX Certified surround sound speakers. BTW, all these are 5.1, not 2.1 sets. The reviews on youtube and elsewhere give it 5 stars, and some go as far to say that the sound matches $500+ units, saying its the best midrange speaker system around. The ten inch sub is appealing too(movies- watching The Patriot would become just that much more real because of the explosions). Reviews say that the satellite's sound is sharp, clear, and pure, no static or buzz.That's definitely a big deal to me. So yeah, the Z-5500 set is $300+...and the others were $79...I think it's worth it to someone who praises music like I do. If you listen to music occasionally, then you might not get where I'm coming from, but I listen to 3-6 hours of music every day, sometimes more. MY PROBLEM:I already installed the surround sound(the cheaper one) in my room, and it would be retarded to get another set. Not to mention a waste of time and money. I need money to buy the nice set. So, my brother agreed to buy it from me if I install it for him. He wants it to be hooked up to his Xbox 360. Good deal. However, I don't know what kind of output it has. I think its a Toslink Optical Audio output, but I'm not sure. The "receiver" on the sub has three inputs, a black 3.5mm female input, as well as a orange-red and light green input of the same type. These are the direct analog inputs to the speakers; it was a cheap set so they don't have an optical in.MY QUESTION:Assuming that my brother is still interested by the time I have the money to buy those speakers, do they even make a Toslink Optical adapter that will work? I tried google, but I wasnt sure what to search for. Thanks. Also, if anybody has the Z-5500 system, let me know how you like it!My hopeful media setup:Dell Inspiron 1501 laptop with vista2TB Mybook External hard drives(two 1TB drives, either in a RAID setup or not, idk)Videosecu VGA to Component Video adapter32" TVCreative Sound Blaster external 5.1 surround sound cardLogitech Z-5500 5.1 surround soundDream setup:Mac Pro with dual monitorssome kind of adapter to get the video to the 32" TV aboveSame surround soundSame hard drivesSome kind of surround sound cardBasically the only difference between my (hopefully) future setup and my dream setup is the couple thousand $$$ of Mac and Apple stuff. Apple is so much better, but it comes with a price most of us cant afford. It's really too bad lol. For the first setup I only need the hard drives, the surround sound card, TV, and the surround sound to make it complete. Of course, theyre the most expensive parts...darnThanks!

Topic by John Smith    |  last reply