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10-05-2010, 10:23 PM
|  | Registered User | | Join Date: Mar 2010 Location: Lexington, KY | | | What does 575W + 575W mean?
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Does this mean dual output? I'm very used to the system of 300 watts is 300 watts. Mayhaps I'm a bit old school, but I really like the sound of the Ashdown ABM 900 and I was just flumoxed by why they wouldn't just list the amp's output as 1150W. I don't know much about bridging, except a lot of people do it with GKs, so I've heard. I know this is an area of ignorance on my part, but I couldn't think of a better way to find out, especially not knowing exactly what to search for on the forum.
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10-05-2010, 10:38 PM
| | Registered User | | Join Date: Jan 2006 Location: Brookfield, CT | | | It has two power amps, which are not bridgeable. So the idea is to use it with two cabs to get the most out of it. Not stereo, just dual-mono. Think of it as two 575 watt amps controlled by a master preamp. Which is what it is.
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10-06-2010, 07:12 AM
| | Registered User
Owner, Bill Fitzmaurice Loudspeaker Design | | Join Date: Sep 2004 Location: New Hampshire | | Quote:
Originally Posted by dmwynn I couldn't think of a better way to find out, especially not knowing exactly what to search for on the forum. | Read the owner's manual. If you haven't bought the amp yet, or have lost the manual, you can download it. |
10-06-2010, 07:55 AM
|  | Registered User | | Join Date: Oct 2005 Location: Luxembourg, Europe | | | This seem to be the Ashdown ABM900 right?
It has 2 power amps (575watts into 4 ohms each) that are not bridgeable.
The preamp (input + eq) feeds both power amps
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10-06-2010, 08:12 AM
|  | and it will work for you, too | | Join Date: Dec 2009 Location: The Winter Wonderland | | There is a screaming deal on one right now on the forum, if you are interested.
I want someone to buy it because the wheel of rationalization is spinning in my head as we speak.
I really love my wife and kids and I don't want her to kill me, then go to jail and the kids end up raised by a creepy relative...so please help save a family. F/T ASHDOWN EVO 900 |
10-06-2010, 08:30 AM
|  | Smile more, ok?
Staff Reviewer; Bass Gear Magazine Moderator | | Join Date: May 2004 Location: Columbia MO | | Exactly, yup.
Killer amp. Quote:
Originally Posted by dmusic148 It has two power amps, which are not bridgeable. So the idea is to use it with two cabs to get the most out of it. Not stereo, just dual-mono. Think of it as two 575 watt amps controlled by a master preamp. Which is what it is. |
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10-06-2010, 10:36 AM
| | Registered User | | Join Date: Mar 2010 Location: Lexington, KY | | Quote:
Originally Posted by dmusic148 It has two power amps, which are not bridgeable. So the idea is to use it with two cabs to get the most out of it. Not stereo, just dual-mono. Think of it as two 575 watt amps controlled by a master preamp. Which is what it is. | This clears up a lot for me. Thanks. I guess 2 4x10 cabs would be pretty killer with it.
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10-06-2010, 10:44 AM
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Staff Reviewer; Bass Gear Magazine Moderator | | Join Date: May 2004 Location: Columbia MO | | Ummm...yeah 
That'd kill.
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10-06-2010, 02:47 PM
| | | I have used an ABM900 with two 4ohm, Eden 410XLT's  it was REDICULOUS! as the other guys have said, 2 x 575w into the 2 x 4 ohm cabs
GREAT sounding amp! and stupid loud if you have the right cabs and the right application 
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10-07-2010, 09:15 AM
| | Registered User | | Join Date: Mar 2010 Location: Lexington, KY | | | Cabs are another query I have. All of the Ashdown ABM cabs are 8 ohm cabinets and the ABM head is 4 ohms as I read in the manual. Would that not be mismatching the impedance? Sorry, all my experience is with combos; I went from a redhead to a Walkabout Scout, so this is pretty new to me.
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10-07-2010, 09:22 AM
| | Registered User | | Join Date: Jun 2007 Location: Takoma Park, MD (DC) | | Quote:
Originally Posted by dmwynn Cabs are another query I have. All of the Ashdown ABM cabs are 8 ohm cabinets and the ABM head is 4 ohms as I read in the manual. Would that not be mismatching the impedance? Sorry, all my experience is with combos; I went from a redhead to a Walkabout Scout, so this is pretty new to me. | That should be fine. Amps are rated for the minimum impedance they can handle; anyhing higher is fine. You can think of it this way: a short circuit , like if you just connected the speaker termianls of your amp together with a wire, would have an impedance of zero, which would blow up your amp. Having nothing connected to the speaker terminals is effectively infinite impedance as there's no way for current to flow between the terminals. Having your amp on with nothing connected is fine (although it tends not to sound good  ).
Also remember that connecting two identical cabs in parallel halves their impedance: two 8 ohm cabs in parallel = 4 ohms. | | Thread Tools | Search this Thread | | | | 
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