70 Volt Sound Distribution System

How do I hook up more speakers? By ExtremeTech Staff on May 1, at 8: Tips used for Top Tips come from the ExtremeTech forum and are written by our community. Because I cannot connect any other speakers to the stereo. There are 2 auxiliry ports on the back , 1 is used for the hooking up of my pc , maybe I could use the other one? You can pick up the parts at radio shack you will need a box 3 pr. Drill your holes in the top of the box for each pair, might want to seperate the input from the output a bit.

Power Amplifier types

Originally Posted by big ol shea I notice a lot of power amps I’m looking at for PA usage lately stuff like the Crown XLS or a cheap Behringer have four outputs presumably for two speakers and a sub. We have six stereo speakers and two subs we’re trying to hook up. What’s the best way to do this? My speakers are all 8 ohms each and I assume it’s the same for my friend who is providing the other speakers?

That is two 4 ohm speakers in series will give a total load impedance of 8 ohms. Therefore you could have two speakers on each side of the amplifier (right and left). This will get more power to each speaker than running through a speaker selector switch.

Loading, Phase and other tips. Wiring them up to provide the most effective load and making sure that all of them are in phase will help you sound as good as possible. Its not really hard to do, as long as you understand a few things about loading and how to connect your speakers to provide an optimal resistive load. I’m starting with the assumption that you will probably be building some of your own speaker cabinets and will need to know how to wire up the speakers properly.

Luckily, the rules are the same for cabinets that are wired into your system. All speakers and speaker cabinets have some resistive ‘load’, measured in ohms. When you bought your PA system, or other Audio amplifier, somewhere in the documentation, or possibly stamped on the back of the gear, is something that indicates the ‘load’ that the system is designed for.


Speaker Connections for proper impedance match A note about amplifiers: You should always use the recommended load for your amplifier. However, if you must use a load other than the recommended load, here is a short guide. Most solid-state amplifiers would rather look at an open circuit no speaker at all than a load. Therefore, you can usually use a load that is higher than the recommended load.

So the ‘old’ amp I am replacing and the ‘new’ amp have A & B speaker inputs and up until right now, all 4 speakers have been traditionally wired (+ & – on each speaker to red & black on amp).

How to hook a 4-ohm speaker to an 8-ohm stereo Category: However, impedance fluctuates based on frequency, meaning that extremely low bass or high treble can dip into the 2-ohm range or below for brief periods. Most mixers of recent vintage will have this type of connection, but if yours does not, there is still a way to do it. PC speaker systems, for example, are usually packaged with one or two subwoofer bass speakers and a series of smaller surro [More] Category: Each of these cables must be strategically connected in order for each device to either receive or transfer audio and video signals.

Most cable boxes can accommod [More] How to wire a 4 ohm amp to a 2 ohm speaker Category: The amplifier can only operate correctly if the amp is wired to the speaker the right way. Improper wiring can cause malfunction of the amp and speaker. To get the best so [More] How to hook up a speaker selector Category:


February 6, Can a 6 ohm amp drive 4 ohm speakers? It’s never a good idea to driver speakers with an amp that isn’t designed for the load. If your amp or receiver is intended for 6 or 8 ohm speakers, a lower impedance can cause problems. If you do connect speakers with a lower than recommended impedance, your amp will probably not blow up immediately. Consider this a temporary pairing at best and if you insist on an imcompatible pairing, you will need to take some precautions as outlined below.

than four speakers up to a four-channel amplifier, you need to concern yourself with your amplifier’s ability to handle low-impedance loads. If you ignore the way you wire them together, chances are you will fry the amplifier. watts to an 8-ohm load.

I fear you have been yet another ‘victim’ of scare mongering. In many cases, a speaker which has a specification of 4 ohms is quoting the nominal load presented to the amplifier. To understand this better we must invisage a speaker whose minimum impedance is 4 ohms this is normally at the fundamental resonance of the drive unit in an enclosure. The impedance then usually rises with frequency if we exclude cross over componants.

There will then be a rise in impedance verses frequency due to the inductance properties of the voice coil. Typically though, the average impedance of a 4 ohm system will be around 6 ohms 60Hz-3Khz then 6 ohms to 10 ohms 3Khz Khz including the cross over. Yes an amplifier will get slightly warmer when driving a lower load at high volume levels but that is simple ohms law. What we have to look out for here is whether the amplifier driving the system is capable of delivering enough current to sustain high transient signals at the fundamental frequency of the speaker.

These days even the cheapest of amplifiers have built in protection circuits to guard against such eventuallities, but more often than not it is these cheap circuits that cause us the most problems and we often mistake the activation of these circuits as ‘clipping’. A well designed normally found in the upper end of many of our budgets amplifier will have a protection circuit that is ‘stealth’ and goes un-noticed when we crank that volume up a bit too much.

4ohm amp to 8ohm sub

Originally posted by krips View Post My best guess would be to wire the woofers in parallel and then the tweeter in parallel with them. That should give you a 6 ohm load? First, wiring three nominal 8 ohm drivers in parallel will result in 2.

PAGE 31 PARALLEL: When wiring in parallel, the resistance of the speakers decreases. Two 8 ohm speakers wired in (hooked-up) Parallel results in a 4 ohm load. It’s easy to calculate the effect of a resistive load when all the speakers are all the same resistance.

Houston, Texas Many vintage Infinity and Acoustic Research speakers among others are common examples of speakers with low impedance ratings, sometimes very low. Since their woofers used the acoustic-suspension system i. To get that subwoofer-like bass, the engineer allowed the the larger models, especially those from Infinity and AR’s ultimate model the AR9, to dip into the area below 2 ohms which meant you needed to use one heck of a beefy amplifier to hear their full potential.

One mid-fi company still believes in acoustic-suspension: Not surprising since their founder used to work for Most of their offerings are sealed, though their very nice Classic 4 floorstander has its 10″ woofer operating in a ported enclosure. It makes it all the way down to 27Hz – wow. Using a sealed system to reach that same number would most probably drive its rather low 86dB efficiency rating even lower.

I always wondered if this fussy – and expensive – characteristic is what helped contribute to the near demise of the acoustic-suspension system. To use an extreme contrast to that Classic 4, Cerwin-Vega’s CLS10 , also using a ported 10″ driver, has an efficiency rating of 90dB and makes it down to only 38Hz

4 ohm, 8 ohm, 16 ohm

Will 4 ohm speakers work ok with an 8 ohm amplifier? Yes, you can use 2 in series, IE daisy chain them to add up to 8 ohms. For stereo you would need 4 speakers not 2. Most Amplifiers work OK driving to a lower impedance loads anyway so just hook them up. Very high power levels may overheat the amp but at normal volume… it should be fine..

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LOADS Amplifiers are designed to power a specific “load”, meaning a speaker or set of speakers having a specific “AC impedance” measured in ohms. Impedance resists the flow of electric current so the higher the speaker impedance the less current the amplifier has to supply. Conversely, the lower the impedance the more current must be supplied. In other words, a low impedance speaker is a big workload for your amp and a high impedance speaker is a small load.

To push more air, several speakers always of equal impedance can be wired together in a cabinet. The cabinet impedance depends on how the speakers are wired and may differ from the impedance of the speakers. Wiring diagrams and their effect on cabinet impedance are displayed below. An amp works best when driving a load with the same impedance as the amplifier’s “output impedance”.

If they don’t match, there could be consequences: If the speaker impedance is higher than the amp’s, the amp might sound weak or dull.

Rock The Boat Marine Stereo Installation Tips

When these systems quote watts per channel they often mean 1 channel driven. As for the watts output it quotes that would be for about 1 micro second for one instance, basically bumkum and a totally pointless completely over inflated figure to quote. The rules of Physics do not allow output to be greater than input. Thank you also for your informative post. I thought that they had transformers etc inside to step the power up this is how i thought they worked.

My current system is rated at w power input with an RMS of watts.

To start wire the 2 4ohm speakers in series as to bring the load up to 8ohm as the rest of the speakers, now the best thing I would use is a series parallel wiring configuration which retain 8ohm load on the receiver, but you must wire the 2 4ohm speakers seperatly to a single channel and all the rest in series parallel, or you can actually use a speaker selector like those from monster cable.

How do they work together? A 4 ohm speaker is a speaker with a nominal input impedance of 4 ohms. But what’s an 8 ohm amp? That cannot be an amplifier with a nominal output impedance of 8 ohms, because all audio amplifiers have an output impedance of less than 0. There are 4, 6, 8 ohm speakers with this input impedance, but no 4, 6, 8 ohm amplifiers with this output impedance.

It is customary for the connection of audio devices to talk of the source and load impedance or output and input impedance. If we hear something of an “8 ohm amplifier”, then we think usually of the 8 ohm loudspeakers. Here are people asking for help in the forums. They seem to be told something wrong about the actual “impedance” of the power amplifiers and about the speakers and the connections: How to hook a 4 ohm speaker to a 8 ohm amp?

Will 4 ohm speakers work with an 8 ohm amplifier? Must I connect 8 ohm speakers to 8 ohm amp? Connecting 4 ohm speakers to an 8 ohm receiver 4 ohm output into 8 ohm loudspeakers 8 ohm speaker to 4 ohm channel?

Converting Amplifiers Series A (Or) B Speakers To Parallel A (AND) B

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