Can 70v speaker system sound good meaning

With the weather warming, its fitting to review options for landscaping and outdoor speaker wiring. A outdoor speaker system can compliment your outdoor living and entertaining. There are two types of systems that are available: conventional and 70 volt systems. The one that is right for you depends on your outdoor plan.

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Content:

• General Rule for Choosing an Amplifier
• All About 70-volt Speaker Systems
• New Outdoor Audio
• Demystifying 70 V “Constant Voltage” Systems
• Constant-voltage speaker system
• Common Questions Regarding 70-Volt Audio
• JBL Control X
• What Tap Setting Should I use on my 70V Speakers?
• Basics of Distributed Audio
• Understanding Distributed Speaker Systems

WATCH RELATED VIDEO: The Lost Art of AV: 70v Distributed Sound

General Rule for Choosing an Amplifier

High-voltage or constant-voltage speaker systems significantly simplify the installation of multiple-speaker systems in direct comparison to their low impedance counterparts i. There is no need for any series, parallel combinations, or corresponding complex load calculations. In fact for the majority of installations, calculations are strictly a matter of adding the wattage tap ratings of each speaker and ensuring you do not exceed the limits of your power amplifier. The main component of a 25V, 70V or V system is the speaker transformer.

In most cases you would purchase your speaker with an integrated transformer, and use the built in switch selector to choose your power tap. This power tap indicates the maximum power the speaker can receive. Select the correct tap setting for 25V, 70V or V speakers, based on the wattage required to produce the desired sound pressure level for your application allowing for some additional power headroom. Reducing the tap settings may be feasible at the expense of headroom.

Confirm the load impedance is at or above the amplifiers minimum impedance spec to avoid distortion. If you have purchased your transformer separate from the speaker not recommended, but sometimes unavoidable , you will first need to connect its secondary winding to your speaker.

The transformer typically has taps at various impedances i. The primary winding also typically has several taps. Choose the tap that will deliver the desired wattage to that speaker. To use this calculator first find the spec sheet for the speaker you intend to use. The distance from the loudspeaker to the listener position should be application specific. Alternatively if the typical listening position is a standing position with an ear height around 5. If you are into damaging your hearing a rock concert is around dB SPL same as running a chainsaw or leaf blower.

See this link for different decibel ratings. For the majority of applications I do, I set this figure to dB SPL which provides some additional headroom without getting into ear damaging territory. I also typically leave this around 12 dB for voice or 18 dB for music.

This estimate is overly conservative, as this is likely more volume and headroom than I really need. Take some time to play around with the settings as it can be shocking to see how little power is actually required to meet your design criteria. For example we would only need 1W per speaker if our average continuous volume at the listener position is set to 70 dB SPL.

Under powering your speakers does not cause any issue to the speakers themselves. Do not use a standard multi-meter as this will be measuring DC resistance not impedance, which will produce incorrect results. Compare the minimum safe load of the amplifier from the manufacturers spec sheet to your measured impedance. If the load impedance measures too low, raise it by re-tapping all the speakers at the next lower power tap if headroom permits. This can also be done by adjusting the speaker configuration, such as splitting the speaker run into two, locating some speakers onto another amplifier channel or similar.

These aforementioned adjustments are critical to avoid the amplifier from overheating or causing audio distortions.

If the load impedance measures too high, you can lower it by re-tapping all the speakers at the next higher power tap.

In the field I rarely ever see this done as failure to do so just means the amplifier does not run as efficiently as it otherwise could. In the example below we can see that this figure is 25 ohms for the 70V version of the amplifier and 50 ohms for the V version.

For this example, as long as your measured load impedance is 25 ohms or above for the 70V system or 50 ohms or above for the V system then you are operating in a safe region. As mentioned typically you would purchase your speakers with an integrated transformer already installed.

If this is not feasible, I would recommend contacting the manufacturer to see what model of transformer they would recommend for your application. If you need to purchase your speaker transformer without the help of the speaker manufacturer there are a few items to consider:.

My recommendation is to always stay with an integrated transformer to ensure it is matched to your system. In some cases this may mean specifying a speaker from a different manufacturer, or working with your manufacturer to have the modification done prior to being sent out to you.

Try this fantastic line loss calculator from Crown Audio. Unless I have a particularly huge cable run supporting many speakers, 16AWG is typically fine. See my recommended speaker cabling type here. I have a customer that has an office with 8 70v in ceiling speakers. The previous owner was running them through an old Sony home stereo, and eventually burned the Sony out.

The speakers each have a volume control integrated into the grill. I am trying to do them a favor and keep from having to replace the speakers in addition to having replaced the amp with an appropriate 60watt 70v amp. The speakers are all tapped at 1 watt giving me a lot of headroom. If I tap the 3 speakers that need more volume at a higher wattage, will those zones be louder, whilst leaving the other zones where they sit currently?

In general tapping 70V speakers at a higher wattage will produce higher output on those speakers than its lower tapped equivalents. Trying to save the client money by repurposing existing non-ideal equipment can be a loosing battle. Best of luck to you. Your email address will not be published. Skip to content. How Many Watts do I need? Under Driving Speakers Under powering your speakers does not cause any issue to the speakers themselves. Over Saturating Speaker Transformers As mentioned typically you would purchase your speakers with an integrated transformer already installed.

If you need to purchase your speaker transformer without the help of the speaker manufacturer there are a few items to consider: Use a high-quality transformer with low insertion loss Avoid driving small transformers past their nominal input voltage rating which may lead to transformer saturation, and possible amplifier overload and signal distortion Consider also using a high-pass filter ahead of the power amplifier to prevent strong low-frequency transients which can also lead to core saturation most constant voltage amplifiers have this built in on each output My recommendation is to always stay with an integrated transformer to ensure it is matched to your system.

Related Questions: What size cable should be used for a 70V system? Leave a Reply Cancel reply Your email address will not be published. Leave this field empty.

All About 70-volt Speaker Systems

The ratings and specifications are based on sine waves, but any audio signal can be played over the system. Myths regarding these systems abound. Some are rooted in fact. Others are not. Here are some of the more common misconceptions about transformer-distributed loudspeaker systems. Audio signals are dynamic, meaning that they are only present when something is playing over the system.

New Outdoor Audio

Your browser's Javascript functionality is turned off. Please turn it on so that you can experience the full capabilities of this site. Interested in placing a Bulk Order? Click here. All-new design echoes the best-selling Control form factor with an updated spinSleek, angled profile for a sophisticated, modern lookFront and rear protective rubber trim. Gold binding post terminals for a secure, high-quality connection to a receiver or multi-zone amplifierIncludes wall mount brackets that can be rotated, tilted and angled towards the listenerAvailable in black or white finishes. We noticed that you already have products in your cart. In order to add spare parts we have to empty your current cart.

Demystifying 70 V “Constant Voltage” Systems

Outdoor speaker technology has come a long way in recent years. OSD Audio engineers get a little crazy when it comes to disguising speakers. We offer traditional box and Omni speakers, but where it gets really fun is disguising them like rocks, planters, birdhouses, vases, and even speakers shaped like tree stumps. Since there are no walls to reflect sound, getting good sound in wide-open spaces can be tricky. Unlike a controllable indoor space, there are no ceilings or walls to reflect sound.

Constant-voltage speaker system

Audiophile Performance. Designed for the Outdoors. For the ultimate, stealth outdoor experience the Garden Oasis family of products are designed to evenly distribute sound throughout your yard by combining multiple speakers with in ground subwoofers. Not only does this reduce potential noise complaints, but the products also blend in with your landscaping for a performance that is easily heard and not seen. With Garden Oasis GO , the bass is meant to be handled by a dedicated subwoofer that uses a specially designed port and hood to evenly distribute bass within a listening area. This not only removes a lot of stress from the other speakers, but it also means you get an incredible full range sound at ALL volumes.

Common Questions Regarding 70-Volt Audio

There's also little question that most are technically unfamiliar with: 70 V audio systems. Apart from pure curiosity, it's useful to know how our industry has evolved from early days of extremely low power systems, to the behemoths that are in use today. The idea was to raise the amplifier's output voltage at the amplifier to a nominal 70V and then reduce the voltage at the loudspeaker to provide a proper level that the driver s can handle. This is the exactly the same idea that the power company uses to minimize wire size wire is expensive, you know. This all worked rather well, as simple as it is, and was a true Godsend back when amplifiers could barely put out 10 to 25 watts. Loosing even a few watts in the speaker line was too much to loose. By good fortune a side benefit was soon discovered.

JBL Control X

Constant-voltage speaker systems refer to networks of loudspeakers which are connected to an audio amplifier using step-up and step-down transformers to simplify impedance calculations and to minimize power loss over the speaker cables. They are more appropriately called high-voltage audio distribution systems. In Canada and the US, they are most commonly referred to as volt speakers.

What Tap Setting Should I use on my 70V Speakers?

Meanwhile, amplifier technologies have improved and with the release of Vocia , the constant-voltage speaker network takes place in critical life-safety applications, such as voice evacuation systems. The most important aspect of a constant-voltage system is that all connected amplifiers and speakers are referenced to a constant-voltage value Constant-voltage utilizes audio transformers to adapt both impedance levels. Audio transformers usually provide different taps to set up the power taken from the speaker line by the primary coil.

Basics of Distributed Audio

However, with this frequency range limitation, v line is not suitable for foreground, high power or hifi music reproduction. The tappings set the loudspeaker output at what is called a 'wattage tapp' technically it's setting the transformer at a specific impedance, but in simple terms, the result is the relative wattage output level! Often a building may have different acoustics in different areas or have differing ceiling heights and is such cases, different speaker output levels will be required in different areas. However, the client may wish to use the same speakers throughout the building. Therefore, by changing the speaker tappping higher or lower allows the output - in effect the volume from each speaker to be set according the needs of each specific position or zone. In addition, large open plan working spaces for example, may feature the smae cieling speakers throughout, but there are different zones on the floor where high or low noise levels require the speaker levels to be different. Speaker tapping allow a simple change of audio output level to suit the needs.

Understanding Distributed Speaker Systems

That time spent in your backyard, when the weather is perfect and you're surrounded by the people you love, that's the moment we designed these loudspeakers for. The high-quality weatherproof enclosures ensure that you'll always have just the right musical ambiance when you need it. Our detail-driven digital signal processing 70v Amplifiers purify your sound while providing long-range rock-solid power. And as the designers of the first luxury bollard loudspeaker, you can look and sound great in a sleek aluminum finish.