Impedance matching speakers transformers the movie

A device that converts an analog signal to a digital value. Active crossover - A circuit that separates the audio signal into the appropriate frequency bands for the woofer, midrange, and tweeter. An active crossover is placed in the signal path ahead of the amplifier, where a passive crossover is placed between the amplifier and the speaker. A device that converts analog signals to digital signals. The amount of signal sent back to the far end talker can be substantial, and with the added transmission delay, the result is an echo effect that can seriously compromise communication in a teleconference or videoconference. In audio recording, a circuit used to control the volume or level of the recorded signal automatically without distortion due to overload.

We are searching data for your request:

Wait the end of the search in all databases.
Upon completion, a link will appear to access the found materials.

Content:

• Series Or Parallel Speakers – Which is Better + Pros And Cons
• Horn loudspeaker
• How to wire Four Speakers to One Amplifier
• MCT-1 Impedance Line Matching Low-Z to Hi-Z Microphone Transformer XLR-F to 1/4" Male
• QSC in Action
• Frequently Asked Questions
• Russound Tbl-50 Speaker Volume Control Audio Transformers Impedance Matching

WATCH RELATED VIDEO: Speaker Impedance Matching to Amplifier - What You Need to Know!

Series Or Parallel Speakers – Which is Better + Pros And Cons

IP: Logged. Stefan IP: Logged. What Greg should really do is to buy more of a smaller type of surround speaker and an amp that can handle two ohm loads. This will give three benefits Improved coverage and less localization effect. The surrounds can then be wired for either 4 ohms or 2 ohms, all in parallel which is the preferred way to wire them.

There are way less phase problems that will occur at different frequencys than if the sound for the next speaker in line had already passed through another speaker. Also, good used power amps are a dime a dozen these days. Just check E-Bay. More surrounds equals more level which equals less overall distortion level. Stay clear of transformers, they will just degrade performance.

You should also be cautious when running speaker systems below 4 ohms unless you are familiar with the characteristics of the speakers and amplifier you are using.

The rated impedance of a speaker is a "nominal" impedance - the actual impedance may vary considerably over the frequency range. Some speakers are worse in this respect than others and it is not unusual for a speaker rated at 4 ohms to have impedance dips well below 2 ohms at some frequencies.

Unless the amplifer can handle this you can end up with amplifier overload in certain parts of the frequency spectrum. That's not to say don't use 2 ohms, just be judicious in your choice of equipment.

Another tip, never use less than two pair of surround speakers, even in your home system. And if you can only manage two pair, make sure that one pair is mounted just in front of, and the other pair just behind, the main listening area.

This will give the best dispersion of the surround sound field. QSC also has a 4-channel amplifier that will handle down to 2-Ohms a channel. This not only has the obvious EX potential but allows one to break up the surround array so that one can run all speakers in parallel up to a surround array.

As to the imedance curves Most of the low-impedance part of the curve of most speakers is in the very low frequency. Most of the surround speakers in use today have an LF cutoff below 80Hz or 50Hz depending on size and quality.

Most cinema processors and some amps, like QSC offer the ability to high-pass the surround channel to either 50Hz and above. As such, one never will have the low part of the impedance curve come into play. As a side note for the DTS users out there.

DTS places their subwoofer track onto the Ls and Rs surround channels. It is REAL important to high-pass your surrounds at a frequency at or above where your surrounds can safely play. If you have ever used the emperical test disc and played the sweep section, you will hear when the subwoofer section comes Another reason to high-pass is it simply wastes amplifier power and potentially will damage the speaker to have a surround speaker play below it's cutoff frequency. Steve "Old projectionists never die, they just changeover!

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings.

The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.

This topic comprises 2 pages: 1 2. Topic: Odd number of surrounds. Parallel is the best if your amp can do 2 ohms. If you can't drive 2 ohms then a resistor to make up the missimg 4th would be a good way. It should be an 8 ohm 25 to 50 watt resistor. Another but sort of antiquated way is to use a matching transformer to deal with the impedance mismatch. Again,the transformer will soak up some of the power and the core might saturate trying to achieve realistic digital levels.

Both E-V and Crown make large matching transformers. They can be gotten for about With the small number of speakers you have, the all parallel will yield better results. Also consider getting an additional speaker for each side. The more,the better. You can never have TOO many. Those are good sounding amps but they don't like loads below 4 ohms either. The problem I'm trying to get away from is having the surrounds I only have one on each side now be directional except when they're supposed to be.

But, in a small screening room you run out of places to put speakers and if I were to put them to close like right over head it would I think again be directional. So I figured given my seating arrangement and wall space, 3 per side would work out. If we are talking just mono surround effects not stereo surround. You could place two on the back wall equally spaced from the corners inward. In a sense this should spread the surround out and creat less holes in the surround causing the phantom effect to shift and sound directional This was my best setup I could get in my home theater sound system.

For stereo surrounds the back wall speakers are less effective in small settins than they are in large settings I took and fed my stereo surrounds into a stereo reciever running in three channel mode to eliminate the phantom effect and give it it's own center surround channel. I have this experiment I wanted to try, after I get this situation handled.

What I want to do is run the stereo surround signals in where the normal RL signals go in and have it generate a center channel. In this case it would hopefully generate a center surround channel, instaed of the center front channel it was designed to produce.

I have some speakers mounted in the center of the back wall which have their own wiring running to them, for the job. I asked Brad about this once and he thought it would work. It's all ways a great experiment. The Control 1 is only 10 by 7 by 6 inches.

These small speakers are in use in smaller screening rooms and work very well when there are enough of them. The main thing is to create as even a sound field as possible. This will eliminate the localization effect that you have now, and probably will still have to some extent from only three speakers per side. Even in a smaller room you really have to have rear speakers as well for this soundfield to work properly.

The small size of the Control series will allow you to get in enough speakers, 6 to 8 per side, without them becomming an eyesore, or getting in the way. You would still need lots of power and a new amp might very well be in order for this too. The way it is supposed to work is you put in the LR stereo signals in and generates Center front and stereo surrounds. Even if you feed in mono it sounds pretty neat and will give you surrounds.

The part I really like was when I ran nonsync in. You got output from your full system. It has it's own pink noise generator, and a remote control so you could go sit in the audience and balance things the way you like. But that was yesterday. So now I'd like to hook it to the stereo surrounds and generate the center surround.

The left and right surrounds will be dead. Reason, it interferes with the power amp's damping factor. The damping is neccessairy to prevent woofers from nonlinear traveling, degrading the sound quality. It is sometime not economical to use extra power amps, but with 10 Ohm surrounds also around , 5 can be paralleled to a single power amp, and normally this gives ample drive to each. If you're using 4 Ohm amps, a matching Xformer is the better vway. To avoid those saturation and inductivity effects a high quality, large type is recommended to use, but can be as expensive as another power amp.

What to recommend to Greg, I do not know. There are several reasons why not to use them. First, 1, You say you want to maintain the usable damping factor of an amplifier Using the transformer would lessen any benefits from a high damping factor just by inserting it in the circuit as you are now going through the transformer windings. Even with a very high quality transformer you could never maintain the original high damping factor.

I might consider using an autoformer here but core saturation is still an issue at high levels and damping factor, which is not as critical an issue as some think is still lessened. Adding a resistor is much preferable and won't lower the damping factor by any more than if you inserted another speaker. Another benefit of the resistor is that you can get them non-inductive.

So the resistor will have less effect on the sound overall than a transformer would ever. The transformer would cost at least 20 times the price of the highest quality US made non-inductive resistor. Steve Guttag We forgot the crackers Gromit!!! All times are Central GMT Printer-friendly view of this topic.

Horn loudspeaker

The purpose of a load usually is to do something productive with the power it dissipates. In the case of a resistive heating element, the practical purpose for the power dissipated is to heat something up. Loads are engineered to safely dissipate a certain maximum amount of power, but two loads of equal power ratings are not necessarily identical. Consider these two watt resistive heating elements:. Heating elements dissipate watts, at different voltage and current ratings.

How to wire Four Speakers to One Amplifier

Welcome back to part three of our series on design considerations for amplifiers and speakers. When we moved to AVL outputs, I started with amplifiers and speakers, looking first at speaker form factors and coverage patterns , and then speaker installation considerations. Today, we turn our attention to the difference between traditional low-impedance speaker systems and high-impedance also known as constant voltage speaker systems. While the underlying technological differences between low- and high-impedance systems can get technical, the applications and benefits of each are fairly straightforward. Constant voltage audio systems are designed for distributed applications with long cable runs and multiple speakers tied to a single amplifier channel. The goal of constant voltage speaker systems is to leverage something that electric power companies have used for a long time. When electric companies run power through miles of cable, they minimize resistive power loss electricity that dissipates as it crosses over a wire by running it as high voltage and low current.

MCT-1 Impedance Line Matching Low-Z to Hi-Z Microphone Transformer XLR-F to 1/4" Male

IP: Logged. Stefan IP: Logged. What Greg should really do is to buy more of a smaller type of surround speaker and an amp that can handle two ohm loads. This will give three benefits

QSC in Action

This seller has not set a shipping cost for Russian Federation. Please contact them to ask about shipping. Your purchases also help protect forests, including trees traditionally used to make instruments. Anyone can sell on Reverb List your item today to get it in front of thousands of eyes, quickly and easily. Learn more on the Seller Hub.

Frequently Asked Questions

Because of this, all calls may not be answered. For all technical support related inquires we encourage you to email support anthemav. Please expect a slightly longer response time than usual. Thank you for your understanding during this time. There are two versions of the upgrade kit and the one that applies depends on your unit's serial number. Please contact your dealer.

Russound Tbl-50 Speaker Volume Control Audio Transformers Impedance Matching

This is ultimately easy, but before explaining the process I feel it is necessary to provide a warning. Multiple sets of speakers usually can not be hooked directly to a standard audio amplifier without some sort of impedance matching device. This is in reference to those persons whom might want to run speakers in several rooms at the same time distributed audio.

Please refer questions concerning those speakers and systems to the various Internet newsgroups applicable to them. What this means is that as the voice coil starts moving in response to the input signal, it generates a magnetic field of its own that tries to demagnetize the magnet. As its effect lowers the available magnetic field of the AlNiCo magnet, the speaker becomes less efficient, the voice coil moves less, etc. The result is smooth compression, the same kind of operating curve compression that occurs in a tube amplifier.

Order by:. Available to:. Making it impossible for the signal lines to pick up the AC hum and noise in the first place. Unbalanced lines are more susceptible to picking up electrical noise and RF interference than balanced lines- the longer the unbalanced cable, the greater the chance of a problem. Using this device to connect two pieces of equipment is one of the most cost-effective ways to convert between unbalanced signals and true balanced signals. For all Canadian orders we ship all duties and taxes included. Please allow up to 7 business days for your order to be delivered.

In an earlier article we looked at the issues involved in connecting multiple speakers to one amplifier. In this article we look at some of the practical ways of wiring four speakers to each amplifier left and right. For example, it is normal to have your main HiFi amplifier in the lounge room.