ficelles Posted March 31, 2011 Share Posted March 31, 2011 (edited) [quote name='bigjohn' post='1179746' date='Mar 28 2011, 05:04 PM']I reckon you'd be quite hard pushed in a blind test to to tell the difference between 2x8 Ohm cabs / 4 Ohm @ 500W and 2x4 Ohm / 8 Ohm @ 300W.[/quote] Not really in these specific circumstances... the handling @ 4 Ohms is apparently 400W, push 500W (the amp's rated output into 4 Ohms) into that and 3 things will happen very quickly: [list=1] [*]The speaker cone will go beyond its maximum excursion and permanently crease and disfigure. You will be aware of this by the buzzing, farty noise it starts to make. [*]The speaker coil will melt. You will hear nasty crackling noises and a very reduced volume. [*]Smoke will start to escape from the amp as the output transformer drives into a load it can't handle. Silence will soon follow. [/list] Best avoided! ficelles Edited March 31, 2011 by ficelles Quote Link to comment Share on other sites More sharing options...
Merton Posted March 31, 2011 Share Posted March 31, 2011 [quote name='ficelles' post='1183806' date='Mar 31 2011, 08:02 PM']Not really in these specific circumstances... the handling @ 4 Ohms is apparently 400W, push 500W (the amp's rated output into 4 Ohms) into that and 3 things will happen very quickly: [list=1] [*]The speaker cone will go beyond its maximum excursion and permanently crease and disfigure. You will be aware of this by the buzzing, farty noise it starts to make. [*]The speaker coil will melt. You will hear nasty crackling noises and a very reduced volume. [*]Smoke will start to escape from the amp as the output transformer drives into a load it can't handle. Silence will soon follow. [/list] Best avoided! ficelles[/quote] Bollocks, unless you push everything too hard. Quote Link to comment Share on other sites More sharing options...
Musky Posted March 31, 2011 Share Posted March 31, 2011 (edited) [quote name='ficelles' post='1183806' date='Mar 31 2011, 08:02 PM']Not really in these specific circumstances... the handling @ 4 Ohms is apparently 400W, push 500W (the amp's rated output into 4 Ohms) into that and 3 things will happen very quickly: [list=1] [*]The speaker cone will go beyond its maximum excursion and permanently crease and disfigure. You will be aware of this by the buzzing, farty noise it starts to make. [*]The speaker coil will melt. You will hear nasty crackling noises and a very reduced volume. [*]Smoke will start to escape from the amp as the output transformer drives into a load it can't handle. Silence will soon follow. [/list] Best avoided! ficelles[/quote] 1. Most bass speakers will be pushing their excursion limits at around a third of it's thermal power handling. You'll be aware of this by the buzzing, farty noise it starts to make. In which case turn down and/or reduce the bass EQ. 2. The speaker coil will melt, at which point you'll hear no sound at all. Before this happens number 1 will kick in. 3. If the speaker goes open circuit smoke will start to escape from the amp as the output transformer drives into a load it can't handle. If it's a valve amp. SS amps don't have output transformers. Fixed it for ya. Edited March 31, 2011 by Musky Quote Link to comment Share on other sites More sharing options...
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