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Old 10th December 2010, 07:49 PM   #101
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by phase_accurate View Post
As most bass players want a clean sound it is important not to use the overdrive section of the amp.

Charles
Im not just thought it was fun

will try to see if I can get a look inside amp
but I doubt its even close 15watt
or maybe its not fit fore passive pickup
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Old 16th December 2010, 04:03 PM   #102
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A compressor would probably be in order, so that the peaky output of a bass guitar won't destroy speakers.

But yeah, building a cabinet and some sort of amplifier would help things a lot.
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Old 18th December 2010, 03:38 AM   #103
bigbeck is offline bigbeck  United States
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Quote:
Originally Posted by phase_accurate View Post
As most bass players want a clean sound it is important not to use the overdrive section of the amp.


Another thing: Does the power-amp stage have an output capacitor ?

Regards

Charles

Would a bad output cap cause the amp to fart out when you dig in?
I'm playing bass through a 65 watt Peavey guitar amp (clean channel). I'm using the emminence Basslite 2012 (150 watt) in a home made cab built to Emience specs. It sounds good until I crank it up loud enough to play with drums. Then it distorts and sounds farty - almost like it's blown. Any ideas? I did notice a couple of large caps in the output section. Could they be the problem?

Don
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Old 18th December 2010, 10:21 AM   #104
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I'd suspect the driver's bottoming out.

Watch the driver as you play. If it starts moving a lot (I mean more than 10mm p/p), you need more drivers, or a driver capable of moving further in a linear fashion.
Apart from that, the amplifier may be clipping.

As a comparison, I use 1x10" and 1x12" in seperate cabs for guitar use, to keep up with drums. With around 80w into them (~40w each). They keep up, but there's not much headroom.
1x12" to go down to 41Hz (bottom E) at drum levels doesn't seem enough.

I can't find detailed cabinet specs for that driver, what did you tune the reflex port to?

Chris
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Old 18th December 2010, 05:41 PM   #105
bigbeck is offline bigbeck  United States
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I built the larger cab 2.7 cubic feet. Here's the data sheets for Basslite S2012

Don

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Old 18th December 2010, 06:04 PM   #106
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Originally Posted by bigbeck View Post
Would a bad output cap cause the amp to fart out when you dig in?
No, you'd just get a lack of bass.

As suggested, it's probably the speaker?.
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Old 18th December 2010, 09:56 PM   #107
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Dropping the port tuning might help, though I'd still suspect a lack of available displacement will be the main issue here.
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Old 18th December 2010, 11:10 PM   #108
bigbeck is offline bigbeck  United States
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Well, I built the cab to factory specs. I even talked to a factory tech a couple of times while building it.

I'm thinking it may be a defective speaker. I read a review on this speaker where another person was having the same problem as me, farting out at moderate volumes on the lower notes.

On a positive note, keyboards sound fantastic with this speaker. Even when turned up loud enough to play with drums. I've had two other bass players bring their guitars over to try it with the same results. The only way I can get it loud enough to play with drums without distorting,is to turn the treble up and the bass down. Maybe it's just a POS - at least for bass. Maybe I should try the smaller sealed back cab design from the Eminence website? It's tiny though, only about a couple of inches larger than the speaker.
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Old 19th December 2010, 09:51 AM   #109
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By what you've described, it's the speaker bottoming out. You likely need more cone area, to get the low frequency output you desire.
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Old 19th December 2010, 11:06 PM   #110
tinitus is offline tinitus  Europe
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I've had two other bass players bring their guitars over to try it with the same results.
rock drummers have always been loud, havent they well, and sometimes bass players too

well, its a long time since I played with anyone, and it wasnt bass
but from memory, my estimate is, you will need about 6x 12"

and another guess would be that your Eminence woofer with its 2" voice coil is best suited for the more quiet player
to keep up with a loud drummer, those woofers need to be top pro quality, with bigger voice coils
and lots of amp power
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