Author Topic: Newbie question nemesis ohms etc  (Read 399 times)

Offline Stu_bass

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Re: Newbie question nemesis ohms etc
« Reply #15 on: June 17, 2019, 09:17:27 PM »
Hi
Me again

I’ve managed to get hold of an Eden nemesis NA 700.
Buying that means I guess I sell the na 320.

So this head runs 700 watts at 2ohm
My 410 cab is 500w at 4 ohm.
So to get max value from the watts I need a 2nd cab that’s 200 watts 4 ohm.

Can alone let me know if there’s anything I’m missing there! 👍

Offline Stu_bass

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Re: Newbie question nemesis ohms etc
« Reply #16 on: June 17, 2019, 09:21:03 PM »
If I’ve 700 w at 2 ohm and my cabs = 2.67,
What effect would that have on my overall output?

Offline Rip Van Dan

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Re: Newbie question nemesis ohms etc
« Reply #17 on: June 17, 2019, 10:34:07 PM »
Big thing is what speaker cabs you use.  At 2.67 ohms, you'll probably put out around 550 to 600-watts which will be split between the two cabs.  A 410 cab with a 210 cab is going to be louder than the 410 by itself.  Two 410's will be louder than a 410 with a 210 - just more speakers pushing more air. You do have to be careful if you use a 210 cab that your 210 will handle half of the power coming out of the amp.

An important thing to know is that your amp doesn't allocate power according to what each cab can handle.  It sends out power based upon the ohms load it sees and that power is then split between the two cabs, regardless of their power-handling rating.  It's up to you to set up a rig that works well for you.

I would NOT limit myself to cabs that can only handle 200 watts because your amp is going to be splitting the power between the two cabs and if you use another 4 ohm cab, it will be sending up to 350-watts to each cab.  So I'd use 350 to 400-watts as the minimum for any cab you are going to run along with your 4 ohm 410. 

If you use an 8 ohm cab, your 410 will get twice as much power as your 8 ohm cab because the 8 ohm cab has twice the impedance (resistance to power flow) that the 4 ohm cab does.  Although that sounds bad, that's actually not a bad thing if you're adding a 210 to your 410.  Because the 4 ohm 410 would get twice as much power as any 8 ohm 210 it was paired with, all of the speakers would get equal amounts of power. 

As an example, lets say that running a 2.67 ohm load (one 8 ohm cab and one 4 ohm cab) is delivering 600-watts (should be close to that).  Since the 4 ohm cab will get twice the watts that the 8 ohm does, your 410 would get 400-watts to spread between its 4 speakers and your 210 would get 200 watts to split between 2 speakers.  That means that every speaker you have will each get 100-watts if you dime the amp.  No worries about blowing out your 210's speakers or your 410's for that matter unless you do some crazy EQ settings, such as boosting your Bass EQ way up.

You can certainly get another 4 ohm cab and then each cab would split the power evenly between them  Net result is that each speaker in your 210 would get 175-watts (350-watts divided by 2) and each speaker in the 410 will get 87.5-watts (350-watts divided by 4).  That means the speakers in the 210 work twice as hard as the speakers in the 410 and you have to be careful that you don't stress the 210 by running it above the power it's rated for - not really safe to feed 350-watts to a a cab rated at 200-watts power-handling.   You can control how many watts you send to it depending upon how high you turn up your master, but it would actually be pretty "iffy" to run a 200-watt speaker cab when your amp can deliver 150-watts more than it can possibly handle.  As long as you don't turn it up too far and the speakers don't make farting sounds, you'd be OK.  But with an amp that will deliver that much more power than the cab can handle it's fairly easy to damage the speakers before you realize you're stressing them.

Hope that helps,
   Dan
Rip Van Dan
Dan Gracia
'82 US-made Fender Jazz Bass with maple neck
5-string Rogue LX405 Pro (Surprisingly good "no-name" bass)
WT500/800 Highwayman (signature model)
D.N.S 410-8, Eden EX112 x2
Line6 G10s wireless
==
spares:
Eden RS400, GK BK250, BPX115 cab, acoustic B410 cab, Sunn Beta 202 (2x12)

Offline Stu_bass

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Re: Newbie question nemesis ohms etc
« Reply #18 on: June 18, 2019, 04:58:29 AM »
Hi Stu,

Paul's given you some great advice, but I would actually differ from his advice a bit in some places. 

First off, whichever additional speaker you get, be sure to get the 8 ohm version.  Reason for this is that if you get a cabinet rated at 4 ohms, it will draw twice as much power as your 410 will.  If your second cab is a 4 ohm cab, it will draw 213.55-watts and your 410 will only draw 106.7-watts.  If the second cab is an 8 ohm cab, than both cabs will draw equal amounts of power up to 160-watts each. That's an important point to keep in mind.

Hi

My current 410 is 4ohm so if I get another 4 ohm cab will one really draw more watts than the other.

Offline Bassmann1968

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Re: Newbie question nemesis ohms etc
« Reply #19 on: June 18, 2019, 07:06:06 AM »
No, both 4 Ohm, both cabs get the same amount of power.
Armin

PLEASE LIKE EDEN ON FACEBOOK!!!
No schematics available!!! Don't ask for it.
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Offline Stu_bass

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Re: Newbie question nemesis ohms etc
« Reply #20 on: June 18, 2019, 07:29:43 AM »
Thanks bassmam

Offline Rip Van Dan

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Re: Newbie question nemesis ohms etc
« Reply #21 on: June 18, 2019, 02:34:31 PM »
Hi Stu,

Paul's given you some great advice, but I would actually differ from his advice a bit in some places. 

First off, whichever additional speaker you get, be sure to get the 8 ohm version.  Reason for this is that if you get a cabinet rated at 4 ohms, it will draw twice as much power as your 410 will.  If your second cab is a 4 ohm cab, it will draw 213.55-watts and your 410 will only draw 106.7-watts.  If the second cab is an 8 ohm cab, than both cabs will draw equal amounts of power up to 160-watts each. That's an important point to keep in mind.

Hi

My current 410 is 4ohm so if I get another 4 ohm cab will one really draw more watts than the other.

Sorry about that Stu. I meant it would draw twice as much as the 8 ohm cab. I mistakenly thought your 410 was an 8 ohm cab at  the time.  4 ohm cabs draw the same amount.  With an 8 ohm and 4 ohm mix of cabs, the 4ohm cab will draw twice as much power as the 8 ohm.  With two 4 ohm cabs, they both will draw the same amount.

Sorry for the confusion.

Dan
« Last Edit: June 18, 2019, 02:36:49 PM by Rip Van Dan »
Rip Van Dan
Dan Gracia
'82 US-made Fender Jazz Bass with maple neck
5-string Rogue LX405 Pro (Surprisingly good "no-name" bass)
WT500/800 Highwayman (signature model)
D.N.S 410-8, Eden EX112 x2
Line6 G10s wireless
==
spares:
Eden RS400, GK BK250, BPX115 cab, acoustic B410 cab, Sunn Beta 202 (2x12)

Offline Stu_bass

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Re: Newbie question nemesis ohms etc
« Reply #22 on: June 18, 2019, 09:04:45 PM »
That’s ok dan
Thanks for your help

The outcome is

I’ve ordered the RS 700 (550 w at 4 ohm) and plugging in the NSP 500 watt 4 ohm.

I understand now that I don’t any more speakers or cabs on top of that.

The na 360 is up for sale.

Offline Rip Van Dan

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Re: Newbie question nemesis ohms etc
« Reply #23 on: June 19, 2019, 02:34:12 PM »
Hey Stu, fell free to list it in our classified section with pictures.

Dan
Rip Van Dan
Dan Gracia
'82 US-made Fender Jazz Bass with maple neck
5-string Rogue LX405 Pro (Surprisingly good "no-name" bass)
WT500/800 Highwayman (signature model)
D.N.S 410-8, Eden EX112 x2
Line6 G10s wireless
==
spares:
Eden RS400, GK BK250, BPX115 cab, acoustic B410 cab, Sunn Beta 202 (2x12)