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Dirty-South Blues Harp forum: wail on! >
Speaker Concern
Speaker Concern
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HarpNinja
1758 posts
Oct 11, 2011
8:13 PM
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I love the sound of my HG2. However, when I sing basslines through a Boss OC-2 (had a POG2, but it didn't track fast enough), I get speaker distortion. I am worried this could tear the speaker.
Anyone with any comments? Obviously it is not designed to be a bass amp. I am thinking of re-routing my signal so the bass effect does not hit the HG2. The con being that none of my looping would go there anymore.
Option two is a speaker better suited for handling some bass frequencies, but I have no idea the route to go.
Another option, which I am currently trying, is turning the signal off the OC-2 down so less hits the amp. I then turn up the bass signal hitting the PA. There are pros and cons to this. I suppose the beatboxing maybe isn't good for the amp either.
The amp just sounds so great with harp, though! I do not want to use an amp switcher as it is more to step on.
Thanks!
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Mike
Quicksilver Custom Harmonicas
Last Edited by on Oct 11, 2011 8:24 PM
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dougharps
110 posts
Oct 11, 2011
8:35 PM
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Have you tried cutting back on the bass setting on the amp? There might be a point at which the amp still sounds OK, but rolls off enough bass to minimize distortion.
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Doug S.
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Oisin
877 posts
Oct 11, 2011
11:27 PM
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Slash the speaker Mike!
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Oisin
Last Edited by on Oct 11, 2011 11:28 PM
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5F6H
891 posts
Oct 12, 2011
2:19 AM
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If possible, I'd first confirm that it IS the speaker, by trying another cab (of the right ohmage). But if you are putting in very low frequency then this may be lower than the current speaker's resonant frequency, a bass/PA speaker may well do the job. The rest of the amp's circuitry should be able to handle things fine, in practical terms speakers are the major difference between regular & bass amps, low frequencies are harder on speakers especially.
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www.myspace.com/markburness
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HarpNinja
1759 posts
Oct 12, 2011
5:44 AM
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99.9% it is the speaker and its inability to handle the bass. As a side note, the Kinder AFB+ does not work with my solo rig. It adds an awful tone both through the PA and amp. After removing that, the rig worked fine (I hadn't tried with the AFB before).
I then turned off the PA and tried just the amp. I was able to get the speaker to distort with the bass. It would probably be hard to tell live, but in isolation it is obvious. It is different than the amp rattle with the VHT. I could keep the bass from distorting the speaker, though, but I am still cautioius of the long term effects.
I think singing the bass lines is hotter coming in than playing harp with the effect on. I also noticed I could get the distortion on a LLF harp.
One cable and I can just not have the amp go into the effect and looper. So it isn't a huge deal. I am just 1.) interested in the effect of using an octave pedal on the amp and 2.) curious as to possible solutions.
I mean, I couldn't use just the amp with this rig. I'd need a powered PA speaker to handle the lows and not sound bad. I am sure a larger amp with a different speaker would work too...assuming wattage has anything to do with this.
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Mike
Quicksilver Custom Harmonicas
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5F6H
893 posts
Oct 12, 2011
6:45 AM
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2) Use a new speaker/cab in the HG2 rated for low frequency (say 50Hz to 5K?, you don't want something that shelves the high end too early otherwise the amp may become to dark overall, you might struggle to find a 4ohm speaker). Wattage is not so relevant, other than any amp runs out of headroom earlier when trying to push lows, but the circuit will just limit lows itself, whereas the speaker might not handle them at all.
Guitar speakers tend to have resonant frequencies between 90Hz & 150Hz, allowing for an octave to promote harmonics, you could be chucking out way below the former number. Note that as you hook up more speakers of the same type in one array, frequency response widens.
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www.myspace.com/markburness
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isaacullah
1625 posts
Oct 12, 2011
10:56 AM
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I have the same problem with my own looping rig. The main problem is that you either have to stick with your harp amp and live with flappy bass distortion (which sounds bad) or switch to a bass amp and loose your harp amp tone. There is one solution I can see, however, and that is to route through a big clean powered two-way speaker system, and then get your amped tone from a device placed BEFORE the looper so you can turn it on AFTER you've looped the bassline. That device could be a DSP pedal's amp simulator (you've got a Line 6 one, right?) or something analog like a lone wolf harp break pedal or the preamp out from a small harp amp.
I'm still messing with this myself, but due to my very low budget (grad student!), I'm relegated to buying parts piecemeal and building my own equipment. I've got all the drivers necessary too build my two-way cab for my little PA (a 6" mid-range driver and a sub-woofer), but I have get some solid-core wire to wind the inductor for the crossover. When that gets done, I'll be looping with my RP, and use the RP to do both the tone for the bassline and for the harp with custom patches for each, and then route the sound through my small PA into that two-way cab.
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