Bass guitar to Passive PA Sub?

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I'm trying to go with an unorthodox amp method. Using a modified 6 string bass, (EADGBe) so I can't use a normal bass amp (as the highest it can go is 659.2hz and that will screw up most bass amps.) I need a way to plug my bass in> go through some type of amplification that will raise it to a level > power an 800 watt sub. (Gemsound SUB20) what would I use to raise that input?

Thanks:3
Thedwick
 
the fact that you string your bass a fifth higher, even if its 6str should not be a problem.. i may not have an answer but i play basses too, recently a short scale EADGC and like to experiment with amplification, so the thread interests me. What exactly are the problems you were mentioning? Unbalnced feeding from string-to-string? I dont understand the usage of the sub, especially in the case of up-tuning..

misok
 
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Well The highest note would be the same as the e on the twelfth fret of a guitar so I'm trying to find some type of speaker that would be able to handle bass amd guitar because I've heard bad things about plugging a guitar into a bass amp and vise versa. The main reason I'm looking for a pa rather than an amp is because of the whole '$500 for a decent one' thing. I'd asked my recording arts teacher about it except when I did it was understanding that the Subwoofer was powered and that I would be using a direct box. Basically I need something that would power the amp and send my bass-ness to it. Like an overpowered directbox.

Suprised by the speed of responses!:3 many a thanks for that
 
Hi,

The response of any nice sounding bass rig goes way beyond
the highest fundamental of any type of bass guitar and the
only real issue is handling low B on 5 and 6 strings.

For all notes the 2nd harmonic of the fundamental is the strongest
and its the reproduction of the harmonic content that gives the
amplifier its sound (among many other possible other things).

A good four string bass amp will handle a high tuned 6 string better
than anything else, your unorthodox approach will sound poor, as
basically it makes no sense, in reasoning, or planned application.

My very old Peavey MkIII bass head is a classic case, it sounds
fantastic (IMO) for the type of bass sound I like, and it has EQ
that can deal sensibly with anything bass instrument related.

rgds, streten.
 
My very old Peavey MkIII bass head is a classic case, it sounds
fantastic (IMO) for the type of bass sound I like, and it has EQ
that can deal sensibly with anything bass instrument related.

rgds, streten.

So I'm assuming my idea should be pitched. But a powered amp with a peavy mark III would work as far as having it make loud noise? Keeping in mind I'm working with High school minimum wage type of budget, is there anything thats... Well... big and effective you'd recommend? Looking at $2000 stacks has left me trying to find the cheaper way. preferably less than $300:p


Thanks again
 
Well The highest note would be the same as the e on the twelfth fret of a guitar so I'm trying to find some type of speaker that would be able to handle bass amd guitar because I've heard bad things about plugging a guitar into a bass amp and vise versa.

Have you heard of a Fender Bassman?

Plugging a bass into guitar amp is asking for trouble, yes. The bass guitar goes an octave lower than a normal 6-string, which means you need much more mechanical power handling from the speakers to cope. A normal guitar speaker will very quickly dismantle itself when subject to high-power bass guitar usage.

That said, guitar speakers usually go up to ~5kHz, and some bass guitar amps go to 10kHz. This upper limit to their frequency range that you've got into your head doesn't exist: the harmonics of slap-bass go waaaaay higher than anything you've mentioned, so I would think any bass amp in the world won't get "messed up" by 659.2Hz ;)

Chris
 
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Joined 2005
... without tweeters ...

no doubt gives a nice natural and easy tone, with the right combination ;)

to some extend it probably also depends on your pickups, and onboard tone control, string type, etc etc

I would like to try a PA floor monitor
but would no doubt need a low noise amp setup
and again, instrument tone controls are adjusted for use with instrument speaker :scratch:

am I on topic ?
 
I would like to try a PA floor monitor

am I on topic ?

Hi,

PA speakers generally don't have the the top end boost
/ peak nearly all bass speakers (and guitar speakers) have.

On their own they won't have the ability to cut through
the way a bass cabinet can by having a very high ouput
before roll off. Here is an extreme example, an Eminence
Basslite 15" followed by a less extreme Eminence 15":

DV016_Jpg_Large_660081_graph.jpg


legend%20cb15%20graph.gif


I have a a 1x15 and a 4x10 I used with the Peavey mk111.
Together the 4x10 dominates the top end but the bass end
is weak without the 1x15. the 1x15 is very usable on its own.

I actually swapped the driver in the 1x15 with a 1x15" from a
combo as the Marshall 1x15 dominated the 4x10, the swap
made my stack better and added top end bite to the combo.

rgds, sreten.

The peak is unsurprisingly generally an octave or more
higher for guitar speakers than bass speakers, but many
"bass" 4x10's are essentially guitar speakers, not bass.
(There are exceptions of course, proper bass 4x10's.)
 
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Joined 2005
PA speakers generally don't have the the top end boost
....

yeah, I know, but I find the sound nasty and harsh

even smaller 8" sound coarse without a filter ... IMO

but you are right that with a loud playing band, you may need it
and won't hear how nasty it really sounds either

my ears prevent me from playing that loud ... so I'm more into the finer tunes ;)
 
is there anything thats... Well... big and effective you'd recommend?
Looking at $2000 stacks has left me trying to find the cheaper way.
preferably less than $300:p
Thanks again

Hi,

The best rig I've ever played through was a Fender Bassman 135
head through a big (deeper than most) Trace Elliot 4x12 bass cab.
Sublimely playable in the reaction of the sound to your fingers.

On a budget your after quality and quantity. How good it
sounds is more important than how loud it goes, but for
the latter there is no substitute for big cabs, and two of
them go a lot louder than one with the same amplifier.

I don't use my combo much nowadays. In smaller venues
I'd only use the 1x15, bigger I'd add the 4x10 (the head
easily drives both in parallel). I didn't but could of also
added a "bright box" (high passed top end) to the mix.

The head has extensive EQ, if its used to brighten the
1x15 it works, but you lose some headroom from EQ.
With the 4x10 less EQ means more headroom. The
head power output doubles (+3dB) and the two
boxes double efficiency (+3dB) quadrupling output.

i.e. the head + 1x15 + 4x10 sounded like a 4 times
as powerful version of the head + 1x15 : flexible.

rgds, sreten.
 
yeah, I know, but I find the sound nasty and harsh

even smaller 8" sound coarse without a filter ... IMO

but you are right that with a loud playing band, you may need it
and won't hear how nasty it really sounds either

my ears prevent me from playing that loud ... so I'm more into the finer tunes ;)

Hi,

My head has the EQ, low shelving knob, followed by a 7 band EQ
with frequencies chosen for bass, followed by a high shelving knob,
to take out the peakiness and harshness if that is needed.

The 1x15 is smoother than the 4x10, better on its own not loud.

Flexibility is nice to have in a set up.

rgds, sreten.
 
Since I have all the shaping I would ever need in my pedal, I just use a PA amp.
My PA amp sucks and about to replace it, so I've been shopping the same lines.

I play EADG (bass) and AEADGB (baritone) though a Karlson K15 enclosure that
has been overbored (and I wish I hadn't done that mod now either) to accept an
18" SigmaPro A2 louspeaker, which was too much VAS and ruined the alignment.
If I build that box again, it will be at least a foot taller and an inch or two wider...

This Behringer looks about a good match to the requirement.
Behringer NU1000 iNUKE 1000 Watt Power Amplifier 248-6700
If you can spare an extra hundred to throw at quality, upgrade to a Crown.
 
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Ex-Moderator R.I.P.
Joined 2005
if you play with the same guys, and more less with the same sound, its probably much easier to tune one instrument/setup to match

but IMO, each different piece of music takes its own special 'tuning' to be playable

with this in mind I would say its all very individual
 
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Joined 2005
The main reason I'm looking for a pa rather than an amp is because of the whole '$500 for a decent one' thing.

I'd asked my recording arts teacher about it except when I did it was understanding that the Subwoofer was powered and that I would be using a direct box.

Basically I need something that would power the amp and send my bass-ness to it. Like an overpowered directbox.

ahh ... :scratch2: ... there is a powered sub available in a music room at school, and you need a preamp with DI out ... but worry that you will be missing too much of the highs :confused:

DI output is usually balanced XLR
a small combo might do the trick

sorry, but why does the title say passive sub, when your teacher say powered sub ? (it's very confusing)
 
tinitus;3664480 sorry said:
passive[/B] sub, when your teacher say powered sub ? (it's very confusing)


When I talked to him I had thought that the sub I was looking at (Amazon.com: GemSound SUB20 800W 15-Inch PA Subwoofer: Musical Instruments) was a powered sub. However, after further research two days later, I realized that it was physically possible to have a passive sub (I'm new to this stuff) so I figured I'd ask the world:p I do have a mixer that can power other pa satellite speakers but it's obnoxiously big. Trying to find the fundamentals of what I would really need. I've been able to hook it up to a PA system and all that jazz but carrying 200lbs+ of stuff around isn't very fun :p
 
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