Porting

Resonance129

Resonance129

Feb 15, 2011
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#1
So I've been doing research on Cabs/Amps recently. I currently own an Ampeg 2x10 that's GREAT for rehearsals, but I'll obviously need more than that for gigging.

Practically, I don't think I want to go over a 4x10. I've listened to quite a few different brands and have begun to focus on the Markbass 4x10's, but I've noticed they come in both front ported and rear ported versions. Same cost, same output, same everything for the most part. That made me wonder...:

How do rear ported cabs and front ported cabs differ?

Is there much of a difference, or is it more of a stage setup preference? Is one version boomier than the other? Does one over heat or handle more voltage than the other?

Noob question, yet again. I'm learnin...
Thanks much.
 
#2
In theory, port location shouldn't matter as low frequencies are omnidirectional.

In practice, front ported cabs are a little easier to deal with as they sound the same when pushed up against a wall as they do when they are away from the wall.
 
#3
Problem with the stats you get from manufacturers is they generally aren't the useful ones. The front and rear ported cabs could sound pretty different, but it won't be a function of where the ports are, just something they aren't telling you in the specs.
 
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#4
Ports are usually placed on the rear to save space on the front baffle. That could mean that the rear ported cabinet is smaller than the front ported one, resulting in less low bass response due to the smaller internal volume and tuning.
 
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#5
the rear port is to reduce the foot print which yields a 24.5 compared
to 29.5

technically rear port and front sound the same cause low frequency is non directional. But I have used rear port and they can sound different depending on how close you to a wall and at practice and small stages it's happens.

likewise as much I don't like markbass amplifiers the 410 standard is impressive design. dual slot ports and a incredibly deep cabinet at 19" and the custom neo drivers produce 103dB sensitivity which is high for a ported 10"
 
#6
Ok, good stuff.
Thanks for all the responses.
I'm not "sold" on the Markbass brand, but of all the amps I've played around with in music stores, it's consistently impressed me the most. With the porting info you guys have given me, I feel like I have a bit more direction while shopping.
Thanks again.
 
#7
If you and your car can handle the bigger size 104HF...go for it. I just use it with a Little Mark 800 and get compliments all the time. The sound is big, full, warm with well integrated highs. The big internal volume makes for a very natural bass extension. You can even cut the bass to 10 o clock without sounding anemic. No need for bass boosts....and the best 24,7 kg!!
 
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