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Bass Cab Speaker Replacement

Discussion in 'Amps and Cabs [BG]' started by Scot Mick, Apr 16, 2015.


  1. Scot Mick

    Scot Mick

    Apr 16, 2015
    Hello, I have a older 175w 8 ohm Ampeg cab with 1-15" and 1-10" and a horn. Love the cab but the speakers are destroyed. I was curious if i could use higher wattage speakers to replace them and get the handling a bit higher. I currently use an Orange Terror bass 500w head. Does this sound reasonable and can anyone give me advice?
     
  2. FunkHead

    FunkHead Supporting Member

    Mar 10, 2007
    I would give Dave at Avatar a call. He will likely recommend some replacement drivers and has good prices. That cabinet would sound best with the original drivers but maybe you can get close and increase the power handling. Speakers | Product Categories | Avatar Speakers
     
    Scot Mick likes this.
  3. tastybasslines

    tastybasslines Banned

    May 9, 2010
    Los Angeles, CA
    Sounds reasonable. You could/should however get a replacement recommendation from Ampeg or Eminence first.
     
    Scot Mick likes this.
  4. Ampeg will recommend replacement drivers, but will not design a new cab with substantially higher power handling. If you push that amplifier at all, the stock replacement drivers will not last. You're going to need a serious 15 inch driver. You can probably use the horn (if you want to). If you provide the internal volume of the cab, and dimensions (and number) of any bass ports, knowledgable people here can make reasonable recommendations. Your tone preferences (fat bass, tight bass, deep bass, aggressive mids, old school, modern, etc.) and the types of music played would also be helpful.
     
    Last edited: Apr 16, 2015
    Scot Mick likes this.
  5. Does that cab have a crossover for the 10 ?

    Does it have a separate chamber for the 10?

    Cab may need a lot of re-engineering to make it useful.
     
  6. You have a 175W cabinet and are pushing it with a 500W amp. Hmmmm.

    Installing drivers into a cabinet not designed for them could end up with less power handling than the originals. without doing the calculations and taking into account the drivers TS characteristics you'll end in a crapshoot. Might sound great, more likely not to.
     
    cfsporn likes this.
  7. To quote myself from your other duplicate thread.

     
  8. Omega Monkey

    Omega Monkey

    Mar 8, 2015
    Is it safe to assume that you destroyed the speakers running them with an amp with 2.5 times more power than they could handle?

    You have 5 components here basically. Cab (ie wooden box plus hardware), 15, 10, horn, and crossover. it sounds like at a minimum the 15 and 10 are toast, but you should verify this before proceeding. The battery trick and the push trick would be a good start.

    The horn and crossover could also be toast. Maybe not, but they're engineered for a 175w system, so if you try to upgrade the 15/10 to a 300w+ system, they may not keep up.

    So once you figure out which of the 4 non-cab components is still useable (if any), your next choice would be to either get original replacement parts for everything else, or do a system upgrade using the cab as a platform for something better.

    It depends on your budget and how particular you are whether that might make sense, as well as the particulars of the cab itself (mainly internal volume, tuning frequency if it's ported, and the cutout size for the jack plate/crossover if you needed a new one which you probably would). If you went super budget, you might be able to get everything you need for $150 or so. High end (if the cab warrants it), maybe as much as $500.

    Go figure out the state of each component (working or not), and then at a minimum the rough internal volume of the cab, plus a general description of the design and report back here and people can get you pointed in the right direction, or at least A direction. Maybe post some pictures too.

    15" 3 way cabs are fairly trendy right now, so there's a chance you could turn this one into something cool.
     
  9. Thor

    Thor Gold Supporting Member In Memoriam

    Threads merged. (Omega monkey beat me to some of it ;) )

    If you call Dave or use another resource, it will be handy for you to have measured the internal dimensions of the cab so the cab internal volume can be derived as that is an integral factor in the selection. You should also determine the answers to Bass Pounder's question as those attributes directly affect speaker choices.

    If there is a Xover circuit for the 10 and or for the horn, as a hi-pass circuit to protect the higher frequency smaller drivers is almost certain to be in there in some form, it may be helpful if you can see the component values (markings ) on them so you can calculate the original crossover points..

    Old capacitors often dry out and if you are replacing the speakers, you can freshen up the caps at little cost and effort., and protect your new speakers better and improve the sound performance. You may find this .pdf helpful as it shows how the inductors (coils) and capacitors are typically arranged in different systems and how the values affect the crossover points.
     

    Attached Files:

    Last edited: Apr 16, 2015
    Scot Mick likes this.
  10. Scot Mick

    Scot Mick

    Apr 16, 2015

    I actually just got the cab used and abused, so there's really no telling how they hard they pushed the it over the years but it's clear that 15 is toast and I would assume the 10 is at least substantially damaged. I think the horn is ok however I may not use it. I do like the size and config of the speaker set up and simply am curious if I should attempt to raise the power handling to suit my needs.
     
  11. Scot Mick

    Scot Mick

    Apr 16, 2015
    Sorry I'm just getting back to you, I need to get a good look at the inside but I think there is a crossover for the 10 and there is no compartment for the 10, all one big ported space. I think.
     
  12. Omega Monkey

    Omega Monkey

    Mar 8, 2015
    Hmm, well it's possible the 10 is fine and the horn is fine, judging by what you're saying. Leaving only the 15 as what needs to be replaced. I would probably just try to figure out a reasonably priced 15 rated around 300w that would work well in the volume and tuning (if it's ported) of the cab.

    If you really like the cab itself, you could just replace all the "moving parts" (ie drivers and crossover), with higher performance ones, but depending on the internal volume and tuning, that may or may not be worth it. Certainly the general potential for a 15/10/horn cab is high, but it really depends on what you have to work with (and your budget).

    Check all the components individually so you actually know for sure what is serviceable and what it isn't. Measure the cab (including port size). Then you will know what makes sense.
     
    Thor likes this.
  13. Good tonal results with a 15/10/horn is going to require very specific 15 and 10 inch drivers or the mids and bass are going to be muddled. If the 10 does have a crossover (probably high pass only) and is in the same box as the 15, a different alignment or even just a 15 with higher power handling could overdrive the 10. The clean and easiest solution is to take out the 10, seal off the opening, and replace the 15 with decent highs out to the 3 - 4 kHz range (assumes the horn has a high pass filter in the 3.5 to 5 kHz range). If you like upper mids, then a 6 inch mid (with small enclosure) could be installed in the 10 inch hole (with an adapter plate), but it would require a low pass filter for the 15 and at least a high pass filter for the mid. This crossover work is not easy to do well. Simpler is usually better unless you have the time and ability to do the design work, with multiple trials.
     
  14. Definitely need to do some re-engineering.

    Different size drivers should NOT be sharing the same internal airspace. So you need to either get rid of the 10 and replace with a mid driver (sealed back, or build an internal enclosure) as AstroSonic said, or you are going to have to build a bigger internal chamber for the 10". Then you would need to re-measure the internal volume of the 15's space and the 10's space and pick drivers that will work.

    Then there is the crossover....................
     
  15. Scot Mick

    Scot Mick

    Apr 16, 2015
    Thanks everyone! I will look at it closer and when I have more specs maybe you all can give me some suggestions on my options.
     

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