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M80 v2 active drivers
#290621 02/05/10 04:41 PM
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Are the M80's still using active drivers? At least I think I recall at one point they were.

Regardless, I'm curious...what's the difference and benefit of active vs passive drivers? Is that how the M80 achieves it's great efficiency, making it relatively easy to drive, especially for a 4ohm speaker? Does it add or enhance anything to the actual sound reproduction?

Re: M80 v2 active drivers
#290627 02/05/10 04:56 PM
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Unless we have a different definition of active drivers, the M80s never used active drivers. As I understand active speakers, they have an amplifier built in.


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Re: M80 v2 active drivers
Ken.C #290628 02/05/10 04:58 PM
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Active drivers have voicecoil, passive don't.
Active drivers does not mean active speakers.
http://en.wikipedia.org/wiki/Passive_radiator_(speaker)


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Re: M80 v2 active drivers
EFalardeau #290629 02/05/10 04:59 PM
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Well, by that definition, yes, all the drivers in M80s are active. You'd be hard pressed to find a speaker that was all passive radiators!

The only speaker in the Axiom lineup that I'm aware of using a passive radiator is the EP0.


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Re: M80 v2 active drivers
Ken.C #290653 02/05/10 07:01 PM
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I think some used to (still do?) use a combination. The active being the "main" drivers and the passive for "tuning" if I understood EFalardeau's link correctly. A designer could use either passive drivers or reflex ports for tuning apparently.

Last edited by htnut; 02/05/10 07:22 PM.
Re: M80 v2 active drivers
#290654 02/05/10 07:03 PM
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Certainly, some do, but Axiom doesn't use passive radiators except in the EP0.


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Re: M80 v2 active drivers
#290789 02/06/10 03:45 AM
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Nut, yes a passive radiator(it isn't really a "driver")is a tuning device for the enclosure which is sometimes used instead of an open port.


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Re: M80 v2 active drivers
JohnK #290825 02/06/10 05:10 AM
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Thanks guys, I'm still trying to learn enough to warrant my stay on this fabulous forum \:\)

Re: M80 v2 active drivers
#290909 02/06/10 05:16 PM
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In recent years, the only place I have seen "passive radiators" at use is in some of the "small box" high-powered sub-woofers. Since many of the speakers in these subs can be 10" and smaller, I gather the passive radiators are there to be engaged by the air that is bouncing around in the cabinet along with the "active" speaker(directly connected to the internal amp) just to emphasize additional bass.

More drivers and higher-powered amps in these cubes make them usually significantly more expensive than a regular larger box sub.

Re: M80 v2 active drivers
#290951 02/06/10 11:12 PM
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My Thiel CS3.6 towers have big passive radiators and my Klipsch LF 10 subwoofer with a pair of passive radiators.


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