How many watts these components have?

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vbel

Copper - Posts: 246

Joined: July 15, 2004

Location: Canada

Posted: November 11, 2005 at 1:01 AM / IP Logged

I'm looking at CDT EF-61 6.5" components, and specs say the wrms is 120. But when I look at specs for the mid driver only, it says only 70 wrms. Where did the other 50 wrms go? To the tweeter? I'm confused here. And how powerful the amp should be? 120 wrms or 70 wrms?

dwarren

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Posted: November 11, 2005 at 1:10 AM / IP Logged

According to the web site, the RMS rating is 120 watts for the set. An amp producing between 50 and 150 watts per channel would be just fine.

The x-over distributes the power accordingly, why are you concerned about the mid's capability?

vbel

Copper - Posts: 246

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Location: Canada

Posted: November 11, 2005 at 9:38 AM / IP Logged

Because in my current car I have 60 wrms 2-way coaxials powered by 75 wrms amp (per channel), and I feel like I need more power. I thought 120 wrms would be sweet, but now it seems that it's pretty much as powerful as what I have now. And I still don't understand howcome the mid is 70 wrms, but the set is 120 wrms. 50 wrms for the tweeter seems a bit much to me. I'm thinking of powering them with a 125x2 amp, but now I'm not really sure if those are the components I really need...or want.

DYohn

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Posted: November 11, 2005 at 10:05 AM / IP Logged

The "power" is generated by the amplifier. The speakers are rated for the power input they can handle. Speakers do not produce power, they use it up. If you are using the same amp, then you have the4 same amount of power available to the speakers.

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vbel

Copper - Posts: 246

Joined: July 15, 2004

Location: Canada

Posted: November 11, 2005 at 10:30 AM / IP Logged

This will go into a totally different car, so everything will be different as well. I understand that speakers handle power and amplifiers produce power. But I don't understand what exactly I'm getting with these components.

DYohn

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Posted: November 11, 2005 at 10:41 AM / IP Logged

According to CDT: Model: EF61 6.5" 2-way Midrange: 6.5" Cast Crossover: "Phase Perfect" Elliptic 4th order 2-way SatNet-456a Tweeter: .75" silk soft dome Power handling: 120 watt RMS Frequency response: 55-20kHz Sensitivity: 91.9 dB. Impedance: 4 Ohm

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vbel

Copper - Posts: 246

Joined: July 15, 2004

Location: Canada

Posted: November 11, 2005 at 10:49 AM / IP Logged

Yeah, this is correct. But the mid itself is only 70 wrms with 120 watts peak (almost the same what I have now). 50 wrms is for the tweeter, right? 120 wrms is just the total combined power of mid+tweet?

stevdart

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Posted: November 11, 2005 at 11:00 AM / IP Logged

I took a look at Dynaudio to see how they rate mids separately from a crossed-over component set. Looked at one of them, and both the combined set AND the mid alone were specified as 100 watts. I wanted to see if on a high-end line they would use a greater RMS for the component set than the single woofer was spec'd, and in this case they didn't.

http://www.dynaudio.de/eng/auto/mobile/240gt.php

http://www.dynaudio.de/eng/auto/mobile/mw150.php

I know there is attenuation built into the crossover. It appears that the CDT line-up is marketing more towards the less sophisticated crowd, or they would have just rated the component set at 70 or 80 watts like Dynaudio did. But at least you did some homework first and you know that you won't be getting that extra 2 decibels that you appear to be hoping for with this set. But what can it handle? You can be sure it will handle 120 watts power.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

vbel

Copper - Posts: 246

Joined: July 15, 2004

Location: Canada

Posted: November 11, 2005 at 12:14 PM / IP Logged

This is quite interesting. If you look at Dynoaudio 3-way system:

3-way system

It says 200 wrms.

But if you go and look at each speaker seperately:

100 wrms.

130 wrms.

20 wrms? (20-150 continous power handling)

All these add up to at least 250 wrms, but the system is rated for only 200 wrms. So I'm not really sure where they're getting these numbers from.

Anyway, seems like the 120 wrms is the correct amount, since you actually need to combine the power of each speaker. I could be wrong, but it sounds logical.

DYohn

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Posted: November 11, 2005 at 12:30 PM / IP Logged

Speaker system power ratings are given for the total capability of the system when it is used as intended. Individual driver ratings cannot be simply "added up" and expected to necessarily jive with system ratings. It's determined by the crossover just as much as by any individual driver ratings. Almost all tweeters, by the way, are rated for 20 watts or less. Most are in the 10 watts range since that's about all that is ever possible in those higher frequencies. The only time you need to care about driver ratings is if you plan to go active and bi- or tri-amp your system.

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How many watts these components have?

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