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Peavey 412 project

C

Charlie_brxwn

Guest
Dec 12, 2016
43
12
Richmond VA
#1
I picked up this cab off craigslist for 50 bucks, after playing an identical one a couple months ago at a show and loving it.

The dude I got it from was using it as a stereo speaker or something and pulled the wires through the 1/4" tap so I need to get it rewired. Aside from that there is hardly a scratch on it.

My plan for this cab, ultimately is for t to be an all in one guitar/bass cab With 4,8,and 16 ohm taps. What do y'all recommend I do to achieve that?
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#2
Charlie_brxwn said:
My plan for this cab, ultimately is for t to be an all in one guitar/bass cab capable of handling 4,8,and 16 ohm loads. What do y'all recommend I do to achieve that?
Click to expand...

Speakers are the load your amp sees, not the other way around.

Take it to a professional, explain what you want to do with it, they'll tell you if that is possible.
 
#4
You still have it wrong. You can not have a cabinet with impedances like you suggest. Amp impedance taps match the amp to the particular cabinet not the other way around.

If your drivers are 8Ω your choices are 8Ω, series parallel, or 2Ω, all parallel. The drivers are designed for guitar. With a bass they will likely have a short lifespan.

IF, and it’s a big if, the airspace in the cabinet is divided into two compartments you could wire one set of drivers to one jack and the second pair to another. If you tried this with one airspace your drivers will have an even shorter lifespan.
 
#5
BassmanPaul said:
You still have it wrong. You can not have a cabinet with impedances like you suggest. Amp impedance taps match the amp to the particular cabinet not the other way around.

If your drivers are 8Ω your choices are 8Ω, series parallel, or 2Ω, all parallel. The drivers are designed for guitar. With a bass they will likely have a short lifespan.

IF, and it’s a big if, the airspace in the cabinet is divided into two compartments you could wire one set of drivers to one jack and the second pair to another. If you tried this with one airspace your drivers will have an even shorter lifespan.
Click to expand...

Well I wouldn't put in drivers that weren't designed for bass. Could I just do 4 and 16 ohms in that case?
 
#9
Charlie_brxwn said:
Im planning to replace all the speakers. I guess I didn't make that clear.
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Still doing things backwards. You design a box to fit the parameters a particular speaker needs to get a desired frequency curve and volume, not the other way around.

You say you love this cab but you want to change everything about it. What do you love about it?
 
#10
Well I played an Svt through one and it sounded great. Everything sounded really full and articulate. A lot better than the modern 810s I usually play through. I wanted to change the drivers to improve versatility, and handle higher wattages. 800-1000 range.

Is there something fundamentally flawed about putting modern speakers in an old cab?
 
#14
Well they were talking about porting "tuning" those cabs too.

I guess I'm just trying to understand is what properties of a cab I need to measure against driver specifications in order to make the best driver selection.

I don't expect to make this thing sound like a commercially produced high end cab with decades of research and development behind it's design.

I do expect to make it a cab that I can toss around in a van, can handle any amp I slap on it and sound way better than average, for under 500 bucks.
 
#15
Charlie_brxwn said:
I do expect to make it a cab that I can toss around in a van, can handle any amp I slap on it and sound way better than average, for under 500 bucks.
Click to expand...

Pick one of these answers:

1. Well then, sell it and get a Peavey 4x10" bass cab which will be superior in every way to the 4x12" and a $450 meal.

2. Buy 4, 8R Eminence Deltalites and wire them series/parallel to present a nominal 8R load. I picked those speakers because they're the first ones I thought of.
 
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#17
Charlie_brxwn said:
I don't expect to make this thing sound like a commercially produced high end cab with decades of research and development behind it's design.
I do expect to make it a cab that I can toss around in a van, can handle any amp I slap on it and sound way better than average, for under 500 bucks.
Click to expand...

"Average" is a commercially produced cab that was designed to work with a specific kind of speaker.
You aren't going to get "way better" than that, particularly if you don't understand the basics of cab design and ohms.

Putting random speakers in a random box yields random results.

I still don't understand the idea of "I love how this cab sounds, so I'm going to replace all the speakers with something totally different."
 
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#18
The entire reason I came here was to avoid putting random speakers in the cab.

I do love the way the cab sounds. I don't expect it to sound exactly the same with new speakers. I'm not an idiot. If I put higher end 10s in my 810 it would sound different too.

I want to use it with different amp combinations than it's currently capable of. I made that pretty clear.

I didn't lose 50 bucks on anything. It's usable no matter what, and I have an 810 I can always use.

My thought process, long term is that I would like to have a set up with an amp like a verellen kalaloch, or hilbish beta. Higher wattage solid state stuff that I can run a guitar through as well. For example The Melvins

How do I interpret the speakers specifications to anticipate how it will behave based on a cabs dimensions and features?

Does anyone know that? Or have a contribution that isn't narrow and condescending, based on a rigidly held quasi-religious loyalty to 10 inch drivers.
 
#19
Charlie_brxwn said:
How do I interpret the speakers specifications to anticipate how it will behave based on a cabs dimensions and features?

Does anyone know that? Or have a contribution that isn't narrow and condescending, based on a rigidly held quasi-religious loyalty to 10 inch drivers.
Click to expand...

Read and understand these pages. That's the kind of information you need to know.
Note that you're still doing it backwards.
Thiele/Small parameters - Wikipedia
Understanding Loudspeaker Data | Eminence Speaker
Invalid Link Removed
 
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#20
A buddy reconditioned a Bassman 135 (might have been a Bassman 100) cabinet....the 4X12 beast with the angled baffle board. The stock speakers distorted easily with bass and their small magnets and tiny voicecoil did not seem "bass worthy."

He wanted to use the cabinet with guitar or bass. We talked about options and he decided on a quad of 110 watt Jensen Mods. The Xmass is low for bass, but the amp isn't really high power so we gave it a try. He loved them...both for guitar or bass. I got them at a really great price.

I believe he used a Marshall head when using the cabinet for guitar. He also said the wide dispersion was incredible.
 
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