Recommended Posts

andoano    0

I have never bought an amplifier to power speakers, so please forgive me for my ignorance. I have always used powered speakers.

I have two speakers that I'll be using as floor monitors for a live band. We just rehearse and play shows/outdoor events from time to time. We play pretty loud, even at practice.

Can anyone here provide a suggestion on which Crown Amp to buy to power these two floor monitors? And lastly, is there a simple way to determine how much power I need from an amp to power any given speaker(s). I've read a few articles here and there, and there doesn't seem to be an easy explanation for the uneducated user:( Seems like there are a lot of variables and opinions out there.

I'm buying a crown based on their reputation and market share...

Each speaker has the following specs:

Speaker Series Pro Audio Model Number PA310-8 List Price $85.99 Color Black Unit of Measure Each UPC 844632084232 Warranty - Parts 5 Years Warranty - Labor 5 Years Product Shipping Weight (lbs.) 16.4000


Speaker Type Woofer Nominal Diameter 12" Power Handling (RMS) 450 watts Power Handling (max) 900 watts Impedance 8 ohms Sensitivity 97.2 dB @ 1W/1m Frequency Response 44 - 4,000 Hz Voice Coil Diameter 76 mm Magnet Weight 80 oz.


DC Resistance (Re) 5.7 ohms Voice Coil Inductance (Le) 1.53 mH Resonant Frequency (Fs) 44.4 Hz Mechanical Q (Qms) 8.63 Electromagnetic Q (Qes) 0.34 Total Q (Qts) 0.32 Diaphragm Mass Inc. Airload (Mms) 62.10 g Mechanical Compliance of Suspension (Cms) 0.21 mm/N Surface Area Of Cone (Sd) 530.9 cm2 Volume of Displacement (Vd) 265.5 cm3 BL Product (BL) 16.94 Tm Compliance Equivalent Volume (Vas) 81.9 liters Maximum Linear Excursion (Xmax) 5.0 mm


Cone / Diaphragm Material Carbon Fiber Impregnated Paper Cone Surround Material Rubber Voice Coil Wire Material Copper Voice Coil Former Black Polyimide Dual Voice Coil No Basket/Frame Material Stamped Steel Magnet Material Ceramic Ferrite Shielded No


Overall Outside Diameter 310 mm Overall Depth 143 mm Baffle Cutout Diameter 283 mm # Mounting Holes 8

Thank you very much for anyone who takes the time to reply to this.

Share this post

Link to post
Share on other sites
dakos    0

I have seen so many articles/tutorials/videos/posts about the subject that are simply wrong, I have no choice but to point you to a few good articles from credible sources and hope that after reading them you'll have a better understanding of what you need...

First, I see a few problems with this speaker's specs, they are a bit misleading, I guess it's on purpose to make you think the speaker is better then it actually is. This is a good article about it:

Second, I don't know what it is you're trying to build or do so I don't know which alternative to suggest you. The leading speaker manufacturers are B&C, Peavey and many others. A good online store would be

As you probably understood by now, powering speakers in a good way, that means to utilize the speakers as much as possible without damaging them, isn't the simplest of tasks. It usually requires a speaker management unit or a simple limiter, although you can get away without one. I think the following link explains why that is in pretty simple words:

Also, these are very useful articles to learn from:

I hope it's not more then what you asked for :)


Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now