Jump to content
Left leaderboard
devil rides out

Query - Running two ampeg 8ohm cabs with different Wattages

Recommended Posts

Posted (edited)

Hello, 

Now I've tried to get my head around ohms etc and I thiiiiiiink i understand but I want to double check because I'm feeling pretty thick today and getting in a muddle.

I have a markbass TTE500. It's 500W at 4ohms/ 300W at 8ohms. I am borrowing an ampeg 4x10 SVT which is 500W at 8ohms for my upcoming tour. I would like to add an ampeg B-115E to this which is 200W at 8ohms. Will I be able to safely drive these cabs with my amp to their potential? I'm wondering if the 1x15 might be driven too hard. 

Any wisdom or suggestions appreciated!

 

Edited by devil rides out
  • Like 1

Share this post


Link to post
Share on other sites

Both cabs will see 250 watts if you run everything flat out. I don't know anyone who does that, as most bass amps don't actually sound very good flat out.

So let's assume you're running your amp at half power. I usually run my 500 watt amps with the volumes at noon, and that's 250 watts which is 125 watts per cab. Unless you're doing something weird with boost pedals you shouldn't damage anything. That's also assuming your amp is actually only on half power when the controls are at noon. The good ones should be set up to do that. I would assume Markbass would be fine.

I had both of those cabs at one time and I always ran the 410 on its own. I thought the 115 just made the sound too woolly.  

  • Like 1

Share this post


Link to post
Share on other sites

I’d say as above, though maybe still take the 115 and stack it all so for one the 410 is higher up so you hear better, and secondly, well, stackmungus, it will look great 😁

  • Like 1

Share this post


Link to post
Share on other sites

Excellent responses hahaha!. I sort of had the seed planted by the band we're touring with said that was their ideal setup but I think you're right, it would be a woolly sort of sound. I'm gonna give it a pass and save up for the barefaced Six 10 I so crave 😭

 

Cheers guys!

Share this post


Link to post
Share on other sites
32 minutes ago, devil rides out said:

. . . . I'm gonna give it a pass and save up for the barefaced Six 10 I so crave 😭. . . .

Good move.

Share this post


Link to post
Share on other sites
On 08/05/2019 at 11:11, devil rides out said:

 I am borrowing an ampeg 4x10 SVT which is 500W at 8ohms for my upcoming tour. I would like to add an ampeg B-115E to this which is 200W at 8ohms. Will I be able to safely drive these cabs with my amp to their potential?

No, as the 115 will reach its limits long before the 4x10. The increased sensitivity realized from using the two cabs may give a better result than just the one, but it also may not. Without question the best cab to use with the 410SVT is another 410SVT, if you actually need more than the one.

Share this post


Link to post
Share on other sites
On 08/05/2019 at 19:43, chris_b said:

So let's assume you're running your amp at half power. I usually run my 500 watt amps with the volumes at noon, and that's 250 watts which is 125 watts per cab. ... That's also assuming your amp is actually only on half power when the controls are at noon.

Yes, very good point. It is not obvious at all, that the power is at half, when the vol pot is at noon. Gain and EQ are part of the chain that affect the output power, too. EQ may be everything but flat, when pots point to north. So beware that the output power can be whatever.

  • Like 1

Share this post


Link to post
Share on other sites
1 hour ago, itu said:

Yes, very good point. It is not obvious at all, that the power is at half, when the vol pot is at noon. Gain and EQ are part of the chain that affect the output power, too. EQ may be everything but flat, when pots point to north. So beware that the output power can be whatever.

Depending on the taper of the volume pot the maximum volume could be anywhere, so the OP can try an experiment. Plug in the 410 and see how the volume changes when the volume control is turned all the way up. Does the amp get louder across the whole travel of the pot or does the volume only change across a limited section, ie the first 50% for example. Whichever one is true, the OP has identified the point of maximum volume of the amp and he can back off the volume to a point where his personal volume level sits.

Noon was just an example that works for me and most of the amps I've owned. If that works the same for the OP, and I'm assuming that Markbass will be the same, then the OP is running his amp in a way that is very unlikely to damage his cabs. The experiment will tell him how his amp operates.

My opinion is that with these particular cabs, mixing a 115 and 410 is not what I'd do, but the OP has to decide that for himself.

Share this post


Link to post
Share on other sites
On 08/05/2019 at 17:43, chris_b said:

Both cabs will see 250 watts if you run everything flat out. I don't know anyone who does that, as most bass amps don't actually sound very good flat out.

So let's assume you're running your amp at half power. I usually run my 500 watt amps with the volumes at noon, and that's 250 watts which is 125 watts per cab. Unless you're doing something weird with boost pedals you shouldn't damage anything. That's also assuming your amp is actually only on half power when the controls are at noon. The good ones should be set up to do that. I would assume Markbass would be fine.

I had both of those cabs at one time and I always ran the 410 on its own. I thought the 115 just made the sound too woolly.  

 

Good answer, but beware of the "volume at noon = half the power". That is an assumption we cannot make, and if that Markbass is designed with the same taper as other MarkBass amps I've owned, noon would be significantly higher than 50% power. But the main message of the post stands.

It sounds like a reasonably safe combination provided we don't go crazy boosting lows or turning everything too high. Be sensible, and listen for unwanted distortion, and you'll be ok.

Share this post


Link to post
Share on other sites
4 hours ago, mcnach said:

Good answer, but beware of the "volume at noon = half the power".

I agree, which is the reason for the post before yours. Hopefully some clarification for the OP.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   0 members

    No registered users viewing this page.



  • Similar Content

    • By nnspok
      Always in pursuit of certain tones... I've definitley racked up too many of these along the way.
      The 2x10 and 1x15 go on top of each other to make a great sounding stack. 4x10 was my personal favourite, real sweet on its own. Cash or trades considered, I'm based in Egham 5 min off M25, J13. I also travel around the UK quite a bit for gigs so worth an ask if you're not London-ish.
      Trade wise, mostly thinking basses. A nice fretless, Fender five strings, a Music Man or something with a juicy neck pickup.
      104HF -£450   £400 £350
      In good shape with a roqsolid cover. Bought from new, noticed the tweeter doesn't work but never bothered to send it back as I always liked how this one sounded- all 4x10 speakers and cab is in great shape. I put a black speaker cloth in front of the grill to mask the orange cones, can easily be removed. 4 ohms, Made in Indonesia.
       
      102HF - £300
      In good shape, everything works and sounds just as it should. 8 ohms, Made in Italy.
       
      151P - £320
      Traveller cab, very close to new shape. Barely been used. 8 ohms, Made in Indonesia.
      Would sell the 2x10 and 1x15 together for £580



    • By jj1234
      £350 for PF-800 Portaflex head.   Collection (London)   Bought in early 2015, but rarely used and still in great working condition.     PF-800 head is in very good condition and sounds huge. A few markings on the surface but nothing obvious. Can be posted.  





       
       
    • By roceci
      ** Now £825 for the complete rig or will split **
      Up for sale is my beloved Genz Benz rig, comprising the rare ShuttleMAX 12.2 head with matching 2x10 and 1x12 Focus cabs. The power and tone on this rig is awesome but I've converted to in ears so this is just sitting around and needs to be used. All components are in VGC and in full working order. Been gigged a fair bit but looked after in pet/smoke-free environment.
      ShuttleMAX 12.2 class D 1200W head with dual FET and tube channels. Includes foot switch, original box and manual. Light scratching to top of head but otherwise in VGC. £550
      Full spec here: http://www.genzbenz.com/?fa=detail&mid=2825&sid=86&cid=95.
      WIll ship at buyer's expense + arrangement.
      FCS-210T 300W 2x10 cab with adjustable tweeter £150
      Full spec http://www.genzbenz.com/?fa=detail&mid=2859&sid=704&cid=96

      FCS-112T 200W 1x12 cab with adjustable tweeter £150
      Full spec http://www.genzbenz.com/?fa=detail&mid=2857&sid=704&cid=96 Less

      Usual bits of scuffing to tolex and plastic corners but no rips on cabs.
      Not prepared to ship the cabs so ollection from Cardiff or happy to meet within a reasonable radius.
      **Would trade for decent 6 string jazz type bass**








    • By CraigPlaysBass
      Lightweight Bass Cabinets for Sale
      Consisting of 500 watt amp head weighing a slim 2.9Kg and two Hartke 1x12" cabs, with tweeters, weighing 15Kg each.
      All items available separately, offers considered. Collection from Ash in Surrey, or can meet at Guildford Station.
      Looking for £315 including postage within UK. Meeting within a one hour drive of Ash is negotiable. Selling as no longer being used! No trades please.
       

      Full pictures below.
      Ashdown MiBass 550
      500 watts rms at 4ohms Weighs 2.9kg Powerful 7(!) band semi-parametric EQ 2 jack/Speakon outputs 8.3 x 2.6 x 6.3 inches EQ presets, FX loop, balanced DI out and lots more... https://ashdownmusic.com/products/mibass-550 This amp head has been rarely used and is in good condition. The EQ is extremely powerful with handy pre-set tone curves and it fits in a gig bag pocket.
      Looking for £165 if purchased individually. Delivery £14 insured via Parcelforce.
       
      Hartke Hydrive HX112 (two available)
      300 watts rms power handling 12" hybrid paper/aluminum cone Switchable between 4 and 8 ohms impedance Size: 20" x 22" x 17.5" Weigh 15kg 41Hz–17kHz frequency response Switchable tweeter (on/off/-6dB) Feet have been relocated to make them more upright but can easily be put back to their original horizontal position. Speakon/jack inputs and more... http://www.samsontech.com/hartke/products/cabinets/hydrive-cabinets/hx112/ These cabs are nice and light, project well and are a comfortable one hand carry. They are in fair condition, reflected in the price. The tolex at the back has previously peeled and has been thoroughly stuck back on as per pictures.
      Looking for £165 each if purchased individually including postage (insured), offers considered.
       
      Photos:

       


       
       
      I've not been active on here in a while, but my old feedback thread is here:

      Thanks for reading!
       
×
×
  • Create New...