Speaker Source Selection

Started by lochok in sci.electronics.basics11 years ago 2 replies

Good Afternoon, I have what I believe not to be a unique situation. I have three amplifiers, and a set of speakers. I need each amplifier...

Good Afternoon, I have what I believe not to be a unique situation. I have three amplifiers, and a set of speakers. I need each amplifier for something different (ones the big home one, ones my personal one and ones because my personal one doesn't have any aux in. Each has 8 ohm speaker connections. I need to be able to connect each of them, with a seperate volume control, to the spea...


"Power" / "Wattage" question

Started by Anonymous in sci.electronics.basics11 years ago 20 replies

Hi everybody. I have a question about "power" What is the significance of "power" in electronics? I know that its the voltage x the current,...

Hi everybody. I have a question about "power" What is the significance of "power" in electronics? I know that its the voltage x the current, but how is that significant in any way? For example, when I buy a 30 watt light or my speaker is 15 watts or something, what does that really mean and is that wattage for my speaker electrical wattage? Also, I read that circuits are designed for...


Help Designing Light Airplane to Camcorder Adapter

Started by David T. Ashley in sci.electronics.basics11 years ago 3 replies

Hi, I'd like to use a camcorder in a light airplane, but I'd like the audio to come from the aircraft intercom system (which carries both...

Hi, I'd like to use a camcorder in a light airplane, but I'd like the audio to come from the aircraft intercom system (which carries both radio traffic and crew conversations). A typical light airplane has two jacks that you plug the headsets into. One jack is I believe for the speaker part of the headset, and the other jack is for the microphone. So, I'm interested in interfacin...


No voltage across power out terminals and speaker playing

Started by Anonymous in sci.electronics.basics11 years ago 50 replies

Hello! I have a Marantz SR4600 receiver.I wanted to measure it's approximated performance with an excellent quality sound card and RightMark...

Hello! I have a Marantz SR4600 receiver.I wanted to measure it's approximated performance with an excellent quality sound card and RightMark AudioAnalyzer. I have a neccessary voltage divider for speaker-to-line levels conversion. My other amp, Technics SU-V4X works ok.No problems at all. With Marantz, I have no voltage reported across speaker terminals when measuring with a multimet...


"new" speaker idea

Started by Jon Slaughter in sci.electronics.basics11 years ago 57 replies

I have an idea for creating a new "omni-directional" speaker and was wondering what you guys think and how practical it is. (in theory it...

I have an idea for creating a new "omni-directional" speaker and was wondering what you guys think and how practical it is. (in theory it works). The a simple implementation might be: Take a balloon and a metal sphere along with a insulated rigid wire. Attach the wire to the metal sphere and put the sphere inside the balloon through its opening. Coat the balloon with a conductive paint ...


Phono Preamp as Line-Out Amp for Speaker

Started by Serious Machining in sci.electronics.basics11 years ago 2 replies

Will a phono preamp work for boosting the line-out signal from a computer sound card to that of 'speaker level' for running a set of small...

Will a phono preamp work for boosting the line-out signal from a computer sound card to that of 'speaker level' for running a set of small non-amplified stereo speakers ? The speakers do sound reasonably well at the line-out level, their volume is just somewhat low, even at the maximum 'on-screen' setting.


Hybrid audio bi-amps

Started by Charles Schuler in sci.electronics.basics11 years ago 1 reply

I have a Pansonic stereo system with separate high and low speaker terminals. There is only one stereo power amp ... thus it is not a...

I have a Pansonic stereo system with separate high and low speaker terminals. There is only one stereo power amp ... thus it is not a true bi-phase arrangement. I can't find the answer to how the hybrids work, so I am posting my guess here. Here is what I think is going on. The right channel is phase inverted when compared to the left. Thus, for a mono signal, the signal voltage across ...


Audio Amplifier Problems

Started by PDI Dave in sci.electronics.basics11 years ago 40 replies

Please Help Me! I have a few amplifiers that i am having problems with and i need to determine if the amplifiers are bad or if the...

Please Help Me! I have a few amplifiers that i am having problems with and i need to determine if the amplifiers are bad or if the speaker circuits are bad. each has upwards of 100 speakers on them (70.7 volt system) and they keep shutting down (internal circuit breaker tripping). they only seem to do it when all/most speakers are hooked up, but i can't yet figure out why. I've checked the AC...


Attenuating headphone side of 1/8" jack

Started by Jack B. Pollack in sci.electronics.basics11 years ago 6 replies

I don't think this is possible, but want to run it by the experts: Using a standard 1/8 stereo headphone jack (http://tinyurl.com/yzqgv8) is...

I don't think this is possible, but want to run it by the experts: Using a standard 1/8 stereo headphone jack (http://tinyurl.com/yzqgv8) is it possible to attenuate with a resistor the HEADPHONE output without attenuating the speaker output. I know that I can plug the headphones into an attenuate or volume control, but don't want to do this. Thanks


debouncing a 4066 switch?

Started by panfilero in sci.electronics.basics11 years ago 8 replies

I'm using an analog 4066 switch in an application where the input is an audio signal being passed to a speaker, I'm going to be switching...

I'm using an analog 4066 switch in an application where the input is an audio signal being passed to a speaker, I'm going to be switching the switch on and off the fastest.... maybe 5 times per second. My question is, do I need to worry about debouncing this switch? Or is debouncing solely for mechanical switches? I feel that I don't have to worry about debouncing since the switch connecti...


Lighting up the inside of a subwoofer

Started by Anonymous in sci.electronics.basics11 years ago 12 replies

Hey everyone, I am an undergrad in ECE and I am working on building the box for a double vented 500W subwoofer. I want to light up the inside...

Hey everyone, I am an undergrad in ECE and I am working on building the box for a double vented 500W subwoofer. I want to light up the inside with some kind of blue light so that it shines out the side (thick clear material) and through the two vents. I also want to put orange LEDs around the outside of the speaker (I go to the university of illinois, school colors). I want the lights t...


Old Lafayette valve radio problem

Started by Anonymous in sci.electronics.basics11 years ago 8 replies

I have a very old valve radio from a company called Lafayette. It has 6 valves which are 6v6 gt 6x5 gt 6sq7 gt 6sk7 gt 6sa7 gt This radio...

I have a very old valve radio from a company called Lafayette. It has 6 valves which are 6v6 gt 6x5 gt 6sq7 gt 6sk7 gt 6sa7 gt This radio was working fine but recently has developed the following problem, when the volume is increased the sound is distorted completely, it can only be heared ok when the volume is very low, and putting the ear onto the speaker. Any ideas?


Piezo to normal speaker conversion

Started by SixteenThirtytwo in sci.electronics.basics11 years ago 7 replies

I have a device with a built-in piezo speaker, but I'd like to get a regular "line out" or normal speaker output from it and see if the sound...

I have a device with a built-in piezo speaker, but I'd like to get a regular "line out" or normal speaker output from it and see if the sound quality improves because of that. How do I do that?


Efficient Speakers

Started by Anonymous in sci.electronics.basics11 years ago 4 replies

From my other thread, I'm trying to arrange a very efficient solar/battery radio as a burglar deterrent while I'm away. Seems the speaker is the...

From my other thread, I'm trying to arrange a very efficient solar/battery radio as a burglar deterrent while I'm away. Seems the speaker is the thing that eats Milly Watts (lucky Milly :-) Homey tells me that a big speaker will give me more sound for a given signal power. I have in my hand a Panasonic "Oval Whizzer" car speaker that is nominally 20W and impedance of 4 ohms. It's about 5" ...


Cleaning Old Soda Off Of A Circuit Board?

Started by phaeton in sci.electronics.basics11 years ago 20 replies

Hey y'all. Been awhile since I've been here. I've missed the joint. I might be picking up an old SS Fender bass amp from a guy at work...

Hey y'all. Been awhile since I've been here. I've missed the joint. I might be picking up an old SS Fender bass amp from a guy at work for dirt cheap. Like buy him a case of beer and it's mine, cheap. Anyways, I don't know the details, but at some point in its illustrious history, it was laying on its back, and a Wild Cherry Pepsi got dumped onto it. Supposedly the speaker is fine, bu...


Need a starting point...Which Micro Controller?

Started by ParaPants in sci.electronics.basics10 years ago

I've always been on the software side and now find my self on the hardware end. I could use some help figuring out which micro controller to...

I've always been on the software side and now find my self on the hardware end. I could use some help figuring out which micro controller to base my studying to complete the tasks at hand. My assembler knowledge is poor, but I'm good at C++. The micro controller needs to receive inputs from 8 sensors, operate 8 LEDs, play prerecorded sound over a speaker, display information on a TFT dis...


Re: Convert output to input

Started by John Popelish in sci.electronics.basics10 years ago 4 replies

Imbronyev_j08@yahoo.com wrote: > Hi i was wondering if there was any way to convert a output connection > on a laptop to a input connection?...

Imbronyev_j08@yahoo.com wrote: > Hi i was wondering if there was any way to convert a output connection > on a laptop to a input connection? is there any device i can buy to do > this? > A pair of resistors connected in series across the output will allow the voltage to be reduced by any amount desired across the grounded resistor. Do you want to reduce a speaker or line output to a m


Small Speaker Box Design

Started by Bill Bowden in sci.electronics.basics10 years ago 2 replies

Trying to optimize a small wooden speaker box for voice (speech) frequency range. It's a 5 X 3.5 X 1.5 box made out of 1/8 inch basswood with a...

Trying to optimize a small wooden speaker box for voice (speech) frequency range. It's a 5 X 3.5 X 1.5 box made out of 1/8 inch basswood with a 2.5 inch speaker inside. I drilled thirteen 1/4 holes in front of the speaker which sounds reasonable with the backside open, but the bass response is too high with a solid back on the box. I figure a few air holes drilled in the backside of the b...


I need to add speaker to tv.

Started by capt steve in sci.electronics.basics10 years ago 6 replies

My wife is driving me crazy! She goes into the bath room to get ready for the day, and turns the tv in the bedroom up till she can hear it over...

My wife is driving me crazy! She goes into the bath room to get ready for the day, and turns the tv in the bedroom up till she can hear it over the running water, toothbrush, hairdryer, etc. The sound level in the bedroom is just short of nuclear. I went to RShack and bought a wall speaker and did the climbing through the attic to wire it in. Only problem is that it only works from an amp...


synth circuit - output to amp? different waveform?

Started by Mad Scientist Jr in sci.electronics.basics10 years ago 5 replies

I built a couple of different synth circuits, schematics are here: http://www.geocities.com/usenet_daughter/tone_generators.htm They work -...

I built a couple of different synth circuits, schematics are here: http://www.geocities.com/usenet_daughter/tone_generators.htm They work - they basically play a tone through a speaker. However, can someone explain (or point me in the right direction) how I can 1. add an output for a guitar amp. Right now they play a sound through an 8-ohm speaker. If I disconnect the wires from the spe...