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15-01-2008, 19:48   #1
Patricide
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My amp is not as loud as it should be.

OK folks, i have myself a 575 watt ashdown klystron and a 1X15 abm cab(300 watts). I noticed for a while that my bass amp was always barley able to keep up with my guitarists spider 2(120 watt, 2X10 iirc).

I just thought it was the way that the 15 inch speakers need to be elevated to throw out there sound and cause it was on the ground that was the problem. However at a recent gig i was playing a fender rumble 100 watt with a 1X15 and it wasa about as twice as loud as the guitar.

Am i doing somthing wrong here, im pluging the head straight into the cab using a patch cable(there are 2 outs , and you can use either speakon or regular cables) If i use speakon would it be louder or some kind of cable that goes from both outs or somthing? I have a 4X10 on order so il have all the volume i need soon but i have a few gigs coming up and i want to get enough volume to keep up with my guitarist in the mean time.

Any ideas thoughts, anything?
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15-01-2008, 21:28   #2
Dord
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Originally Posted by Patricide View Post
OK folks, i have myself a 575 watt ashdown klystron and a 1X15 abm cab(300 watts). I noticed for a while that my bass amp was always barley able to keep up with my guitarists spider 2(120 watt, 2X10 iirc).

I just thought it was the way that the 15 inch speakers need to be elevated to throw out there sound and cause it was on the ground that was the problem. However at a recent gig i was playing a fender rumble 100 watt with a 1X15 and it wasa about as twice as loud as the guitar.

Am i doing somthing wrong here, im pluging the head straight into the cab using a patch cable(there are 2 outs , and you can use either speakon or regular cables) If i use speakon would it be louder or some kind of cable that goes from both outs or somthing? I have a 4X10 on order so il have all the volume i need soon but i have a few gigs coming up and i want to get enough volume to keep up with my guitarist in the mean time.

Any ideas thoughts, anything?

You should be using a speaker cable for a start. There is a difference between regular instrument cables and speaker cables, you can actually damage the amp by using an instrument cable to connect the head and cab(s).
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15-01-2008, 23:04   #3
bat boy
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Originally Posted by Joe Robot View Post
You should be using a speaker cable for a start. There is a difference between regular instrument cables and speaker cables, you can actually damage the amp by using an instrument cable to connect the head and cab(s).
You wont damage the amp but the patch cable might burnout on you. Get speakon cables seeing as you have speakon connections. Theres no real difference between speakon and normal speaker cable but speakon are more secure because they clip into the connections, so less chance of stuff accidentally coming loose when yer playin
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15-01-2008, 23:20   #4
feylya
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What impedance is the cab and what's the impedance on the amp output? And is it just getting drowned out in the band or is it quiet when you play it on it's own?
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15-01-2008, 23:29   #5
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whats the difference in sepaker cables to instrument cables,

i use a speaker cable to conect my head and cab alright, they jsut seem a little thicker, are they just insulated better cause there the same TRS jack
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16-01-2008, 00:58   #6
Patricide
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The cab is 8 ohms the head is 4 ohms. Correct me if im wrong here but the way the cab is 8 ohms its only running at 150 of its 300 watts?

Before you ask, its not the way its eq'd, The problem is just volume, it cuts through fine at low volumes but my drummer is a heavy hitter so its just a problem with volume.
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16-01-2008, 01:02   #7
feylya
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Yup, looks like it's only pushing 150W although, I always get confused with impedences on bass amps
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16-01-2008, 01:10   #8
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yup,next question is there any way to make it push more than the 150?
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16-01-2008, 08:02   #9
Doctor J
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First things first, get a good speaker cable as suggested.

Second, pay attention to where you place your amp and where you stand in context to it. You're better off standing a few metres away from your amp, in my experience, and not in the line of fire of the guitar amp. If you're standing on top of your amp you're just not going to hear it and every bass player does it, huddled politely to the side of their amp. The frequencies your guitar playing friend puts out are largely directional, so most of the volume will be wherever the the speaker is pointing. Is that where you're standing? A lot of the frequencies you're putting out travel through walls, through children, through cars, etc but the frequencies you'll be able to hear clearly are also directional, so if the speaker isn't pointing in your direction then you're not going to hear anything but low end fog and placement of a bass amp makes a huge difference to how it sounds in a room. The ABm 1x15 is well capable of putting it out clearly. As you're playing, move around, you'll see how the low frequencies are loudest in corners. Experiment with where your amp goes and where you go, you'll find you probably need to turn down.

IIRC, with an 8ohm 300W cab and a 4ohm head, you get about 240W into the cab and that should be ****ing loads. I've got an ABM 300w head and a 1x15 300W ABM cab and I've happily been able to hear myself against a Mesa Dual Rec, a pair of Ashdown Fallen Angels, anything. I've done countless gigs with it without ever needing to go through the PA. Someday I'll get a 2x10 to go with it but that's purely a vanity thing, I can't justify it for volume reasons cos I don't actually need it. What you have is putting out a seriously damaging amount of volume as it is.
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16-01-2008, 10:21   #10
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Originally Posted by -=al=- View Post
whats the difference in sepaker cables to instrument cables,
Guitar cables are 'signal cables' and only have to handle very tiny currents, and must be shielded to prevent noise getting into the system. All the cables between the guitar and the amp, including any between effects and any in the amp's effects loop, need to be this type.

Speaker cables are 'power cables' and need to handle large currents, but don't need shielding.

You can't safely use a guitar cable for a speaker cable, because the fine conductors in this type of cable won't be able to stand the high currents and may simply melt - or damage the insulation and short out. There is also a risk to the amp even if the cable survives - because a shielded cable has quite a lot of internal capacitance, it can interfere with the correct loading of the amp.

You can safely use a speaker cable as guitar cable, but you will get a terrible hum and buzz problem because there is no shielding.
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16-01-2008, 15:16   #11
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You won't be getting the full 575 watts until you add another 8 Ohm cab. Currently the head's only running at 8 Ohms, so it isn't putting out the full 575 watts. Get another 8 Ohm cab, connect it in parallel, and that's give a resistance of 4 Ohms, and it's run at 575 watts. Also, a proper speaker cable would REALLY help!
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16-01-2008, 15:34   #12
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Ok folks, after a few minutes searching i see lots and lots of cables on thomann and musicstore but i dont have a clue what the hell is the one i want, anyone give me a hand here?

Also J im iv just about eq'd this thing every way and moved it to god knows how many different spots, i dont stand in front of it when im playing and its facing out to the crowd. Besides this the places im playing are cramped enough by the time the full band is on the stage so i dont have a lot of options available to me. The thing i dont understand is when a 100 fender rumble can be physicly louder when placed anywhere in a room, it just boggles my mind.

Also iv ordered the abm 4x10 at 8 ohms from guitarbargains, i was just told there it wont be arriving till the end of febuary....worst delivery time every seeing as i ordered at the start of december .
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16-01-2008, 16:14   #13
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Originally Posted by Patricide View Post
Ok folks, after a few minutes searching i see lots and lots of cables on thomann and musicstore but i dont have a clue what the hell is the one i want, anyone give me a hand here?
You'd want something like this.
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16-01-2008, 17:12   #14
Patricide
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K, would it be better to get a speakon cable?
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16-01-2008, 17:31   #15
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A speakon cable...

Here https://www.musicstore.de/is-bin/INT...mpTo=OfferList


your head can give out over 300w. Not using the correct lead is just plain dangerous.

The stupid thing about Ashdown cabs are there lack of thru speakon connections on the back of the cabs.

So even when you get the 4x10 and 1x15 together you can only run the speakon into one cab then you must get the correct speaker cable to run from the 4x10 to the 1x15. Like the one mentioned by beecher.
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