Question About Heads And Cabs |
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Question About Heads And Cabs |
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Aug 13 2009, 06:57 AM |
That head is rated at 100w, it should have plenty of juice to cut through pretty much anything! I used to play a jcm2000 through a crate 4x12, and when i switched to a marshall 1960AB i didn't really notice a change in volume, just in tone. Maybe where your problem lies is in your equalization. I'm not sure what style you guys play, but it's common in metal to scoop the mids, and that doesn't exactly make you stand out in the mix. Crank your mids and play em proud!
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Aug 13 2009, 11:36 AM |
Your head is very loud, don't worry about it. The problem is probably elsewhere:
1. As Koopid suggested, put power level behind the head to 100W and keep it there on rehearsals. 2. With the speaker outputs it is very important to match the head impedance (Ohm rating on the output, see labels in the table next to the red output jacks on the head) with the speaker cabinet impedance (check the cab, see what kind of impedance it needs and match it on the head) 3. Some cabinets ARE louder than other, and this is due to speaker sensitivity. Speaker sensitivity is very important and it is the loudness that speaker puts out when fed with 1W of power on the distance of 1 meter, it is labeled in dB (decibels). Some speaker are more efficient than other and this will greatly determine how loud the amp is. For example speaker rated at 85dB on the 100W amp will sound less loud than 100dB speaker on the 50W amp, so remember that when choosing cabs and speakers. More dB it has - louder speaker. -------------------- - Ivan's Video Chat Lesson Notes HERE
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Aug 13 2009, 01:11 PM |
A new cabinet will make the amp 'louder'. It depends on what cab it is though. The easiest way to get more acoustic power from an amp is simply to increase the size/number of speakers it drives. The same amp head through a 1x10" will sound very quiet compared to the head running through 2 4x12" cabinets. Simply, because there is more air being pushed with more speaker surface. The other option is to get a more powerful amp head. This is also true. 412 cab will sound bigger then 112 but only because of the amount of air being pushed. The actual loudness level of the cab will remain the SAME, because power is distributed evenly across all the speakers. So if you have one speaker of 100W rating, and 4 speakers of 100W rating, running throuhg the same head, the 4 speaker cab will only get 25W per speaker. The amount of air is what causes the subjetive loudness increase. However the tone of 412 is much wider, it will have good bottom end, and because of this the overall sound picture is better, so this is also one of the reasons why we perceive it as louder one. This post has been edited by Ivan Milenkovic: Aug 13 2009, 01:11 PM -------------------- - Ivan's Video Chat Lesson Notes HERE
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Aug 13 2009, 03:18 PM
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About the power level, I'm afraid if I put it to the max, It'll blow the cab because before when I put it all the way the sound kept cutting out and sounded very poor
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Aug 13 2009, 03:38 PM |
May be worth checking that the power amp stage is ok then megadeth.
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Aug 14 2009, 10:48 AM |
About the power level, I'm afraid if I put it to the max, It'll blow the cab because before when I put it all the way the sound kept cutting out and sounded very poor Again, are you sure that impedance is matched on poweramp and cab?? -------------------- - Ivan's Video Chat Lesson Notes HERE
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Aug 14 2009, 11:34 PM |
You cannot blow the solid state poweramp with uncorrect impedance settings, only tube amps are sensitive to this.
Check out the manual. If you don't have it, the only one I could find is for combo, and on it it says it puts our 100W at 8Ohm. What is important is to have a cabinet that is rated 8Ohm as well. -------------------- - Ivan's Video Chat Lesson Notes HERE
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Aug 17 2009, 12:29 PM |
...It will either burn open the output transformers windings or damage the output xistors. ... -Adam That's my understanding as well. No speaker connected will result in the transformer putting it self in to essentially an infinite loop until it either blows or the build up of heat damages other components. Wrong impedance connected and it is still possible to do this. Whilst it is less likely to happen in a tranny it can still do so. -------------------- Get your music professionally mastered by anl AES registered Mastering Engineer. Contact me for Audio Mastering Services and Advice and visit our website www.miromastering.com
Be friends on facebook with us here. We use professional, mastering grade hardware in our mastering studo. Our hardware includes: Cranesong Avocet II Monitor Controller, Dangerous Music Liasion Insert Hardware Router, ATC SCM Pro Monitors, Lavry Black DA11, Prism Orpheus ADC/DAC, Gyratec Gyraf XIV Parallel Passive Mastering EQ, Great River MAQ 2NV Mastering EQ, Kush Clariphonic Parallel EQ Shelf, Maselec MLA-2 Mastering Compressor, API 2500 Mastering Compressor, Eventide Eclipse Reverb/Echo. |
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Aug 17 2009, 09:28 PM |
You can tell what impedance your cab is either by using a multimeter (connect a cable, put the multimeter across the 2 rings of the jack and it'll give you a rough reading on impedance) or by looking at the speakers - it'll usually say the imp. on the back of them. If there in series, they add together, if parallel, then you average it. So 2x 8ohm speakers wired in series is 16ohm, 2x 8ohm speakers in parallel is 8 ohm. Small correction, 2x8Ohm speakers in parallel connection is 4Ohm in total. What is the cabinet model? We can check the impedance on the net. -------------------- - Ivan's Video Chat Lesson Notes HERE
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