Advice needed on suitable amp for commercial application

Discussion in 'Home Cinema Speakers' started by arungill, Feb 8, 2014.

  1. arungill

    arungill
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    I am looking for advice on a suitable amp to use in a new restaurant in which I have installed Adastra ceiling speakers model 952.534UK, spec below.

    Adastra : Product : Loudspeakers : Ceiling : 952.528UK

    Questions:

    Q1: Any suggestions for a low cost suitable amplifier , there are 4 speakers installed , need to run music via mp3 or CD player
    Q2: How would I wire these to amp , each speaker has 2 cables , would 4 cables into each amp terminal post -ve / +ve be too cramped or even fit?


    Any suggestions would be very welcome.
    thanks

    Speaker Spec


    Woofer 165mm (6.5")
    Tweeter 18mm (0.7")
    Frequency response 60Hz - 20kHz
    Impedance 8 ohms
    Power max 100W
    Power rms 50W
    Cutout 193mmØ
    Mounting depth 79mm
    Sensitivity (1m,1W) 85dB (±2dB)
    Dimensions 93 x 227mmØ
    Weight 1.1kg
    Packed quantity Single
    Packed Gift Box
     
  2. BlueWizard

    BlueWizard
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    How many speakers are there total?

    How many Zones are there? By this I mean if there is an area for eating, they might like softer background music. If there is a separate Bar/Drinking area, they might like the Big Game or more Rockin' music. Even if those places are on the same room, there is still the potential for different content at different volumes.

    Any sense of your potential budget?

    There is a package deal on the Yamaha AS500 and the Yamaha CDS300 -

    Yamaha A-S500 w/ CD-S300

    or to buy them separately from another source -

    Yamaha AS500

    Yamaha CDS300

    These are extremely common products, available from many sources.

    The Yamaha amp has no problem driving 4 ohm total speaker loads. All your speakers seem to be 8 ohms speakers, so two on each amp channel should not be a problem. The Yamaha Amp also have 85w/ch, so it is not lacking in power.

    Just one word of caution, though you always see it this way in pictures, do not place the CD Player on top of the amp. The Amp need ventilation to dissipate the heat it generates. So, if you must stack them, then put the CD Player on the bottom.Though best not to stack them at all.

    It doesn't sound like you needs are all that complex. You should have no problem connecting a computer, MP3 Player, and/or CD Player to this system. While Broadcast Radio might be nice, Internet Radio has an infinitely greater selection of talk, music, and news.

    As to connecting the speakers assuming there are only FOUR. You will find FOUR speaker terminals on the back of the amp labeled Speakers-A and Speaker-B. Just connect one speaker to each terminal set, and make sure on the front panel of the amp BOTH Speaker-A and Speaker-B are selected.

    Also, and this is important to good sound. The Speaker wire connected to the Speaker(+) terminal MUST connect to the Amp(+) terminal. It is important that who ever installs your speakers wires makes it clear which wire is connected to which speaker terminal.

    Also give consideration to the Stereo Imagining. Which of the speakers you have will work best as a RIGHT speaker and which as a LEFT speaker to give the listeners the best overall sound.

    If your budget is a little higher, then consider the Yamaha RN500 (80w/ch, Digital In, Network capability). The RN500 has computer networking, so if your music is on a computer, then you can stream music stored on that computer and from the Internet. Now this can be a remote computer tucked in an office somewhere, or it could be a nearby Laptop. Though if you have a laptop with the stereo system, there is really no need for network capability beyond connecting the Laptop to the Internet. From the Laptop to the amp can be a simple analog audio connection.

    Superfi - YAMAHA RN500 NETWORKED STEREO RECEIVER

    Also, remember that you will have to acquire a license and pay royalties if you are playing music in public. That's not that big a deal, just part of the cost of doing business.

    Steve/bluewizard
     
    Last edited: Feb 9, 2014
  3. MI55ION

    MI55ION
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    Getting a hifi amp is pointless, a Behringer A500 or almost any other pro amp will be more than adequate for your needs.

    For wiring refer to the first illustration down in the following link per each amplifier channel:Wiring Diagrams | Eminence Speaker
     
    Last edited: Feb 9, 2014
  4. BlueWizard

    BlueWizard
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    The suggested Behringer amp is a Power amp, it has one set of input, and one set of speaker outputs. Though there are ways of reasonably approximating a pre-amp for the Behringer. It could be something as simply as a mixing board. Or something as simple as a low-cost Line Level Switch Box.

    Behringer: REFERENCE AMPLIFIER A500

    While the amp is claiming a massive 600w, in reality it is a solid 100w/ch to 8 ohms, but that is more than enough power for the job.

    As to whether a HiFi stereo amp will get the job done, that depends on the Job. For background music in a modest sized room, the Yamaha should be fine. In a large venue with demands for louder music, we might need to weigh other options.

    Steve/bluewizard
     
  5. MI55ION

    MI55ION
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    The behringer a500 isn't just a power amp in the traditional hifi sense, it has independent volume control for both left and right channels. Refer to product manual:
    Behringer: REFERENCE AMPLIFIER A500

    Also the OP doesn't express the need for multiple sources, refer to question 1 above: 'need to run music via mp3 or CD player'. So no additional preamp or expense required. There are however three types of inputs: XLR, TS and RCA all of which can be utilised to add a total of three sources.

    It is cheap, robust and built for abuse with a 3 year warranty. Perfect for commercial use.
     
  6. Member 96948

    Member 96948
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    Easy. Lets be honest, quality and volume are non issues - It's back ground noise.

    Wire each pair of speakers in series, and then wire the two pairs of speakers in parallel to deliver eight Ohms at the amplifier terminal. Only a mono amp is required as stereo is a non issue over a wide field area like a restaurant.

    Failing that, any 2x30w amp with a mono button will work with two speakers wired to each channel of the amp in parallel as that will result in an 4 Ohm load for each channel. You can probably pick up such an amp from Cash Convertors for £30. Just look for a mono button.

    Russell
     
  7. MI55ION

    MI55ION
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  8. BlueWizard

    BlueWizard
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    Well the Original Poster (OP) has not sufficiently respond for us to know what the real circumstances are. Which is precisely why I asked a series of questions. This need for music has come up regarding a commercial space (bar, pub, restaurant, cafe, general merchandise shop, etc...), and the reality of doing it is usually more complicated than simply initially thinking about it.

    He says, music from a simply MP3 or perhaps CD Player, and that is a good idea, but you can stream an infinite variety of music from Internet Radio commercial free. If this is purely an eating establishment with limited emphasis on drinking, that is one set of parameters. However, if it is a combined pub/cafe, the parameters are different. With computer Network Audio Streaming you can have virtually hours of music unattended. With a CD player, every half hour some one has to select and play a new CD.

    I want the OP to give us much more information about what his real needs are.

    How big is the room?

    Are there four speaker PER AMP CHANNEL, or simply four speaker total? That makes a difference.

    He needs to give long thought to the source of the music. Internet radio will play for days unattended and never repeat the same song. Further, with Internet Radio, you can select the genre of music. If you want Hip-Hop, then there are exclusively Hip-Hop stations. If you want smooth jazz, Pop, hard rock, modern Rock, Classic Rock, Acoustic Blues, Electric Blues, Modern Blues, Classic Blues, Classical, or any other genre, you can likely find specifically that. Further many Internet sources like Spotify let you build your own play lists, so you can tailor the music over time to your personal taste or to create a signature sound for the Cafe.

    Also, if this is more of a cafe/coffee shop atmosphere, then you might want to offer WiFi to your customers. If the focus is more on eating, then perhaps not.

    You do have to pay a license fee, but beyond the preformance license free, the selection of music is both infinite and controllable.

    So yes, he was planning a MP3 player, but, from a functional perspective, is that the best choice?

    So, we need the Original Poster to refine his requirements. Keeping in mind, if he has an Internet connection, then all he needs is a laptop and an amp (he has speakers) and he is set. If he has a CD player or MP3, then he has to purchase a wide selection of songs to play on those devices. The MP3 Player could be set to Repeat or to randomly Shuffle music, so that is a plus. But a computer can do the same thing, and the Internet essentially does the same thing but with infinite variety within one or more genres.

    So, many more details are needed before we can say this equipment or that equipment with any certainty.

    Steve/bluewizard
     
    Last edited: Feb 11, 2014
  9. BlueWizard

    BlueWizard
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    Also given that this is a commercial enterprise, I see no need for underpowered used equipment when for a very reasonable price high powered quality new equipment is available.

    But we need the Original Poster to response, to expand our knowledge of exactly what he has and what he wants, and what he thinks of some of our suggestions, and to tell us how much he would like to spend on the process.

    Steve/bluewizard
     

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