It is currently Mon Mar 16, 2020 8:53 pm

All times are UTC - 7 hours



Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next
Go to page 1, 2  Next
Author Message
Post subject: speaker load
Posted: Thu Nov 06, 2014 10:53 am
Offline
Amateur
Amateur

Joined: Mon Mar 16, 2009 10:21 am
Posts: 199
Location: Louisiana
Main speaker jack & External speaker jack.
On my DRRI head i have 1.main speaker jack(marked as int spk),primary connection to speakers. 2.Ext spk jack(manual says wired in parallel with main, and must be used in conjunction w/main jack). What load will amp see when using both? Since in parallel,would they have to be each 16ohm for the amp to see optimum 8ohm load when using both?
Some 1x12 cabs have two ports one to hook up to amp. The other is to jump to second speaker. How does the amp see this load? if both are 8ohm speakers?Shimmilou?


Top
Profile
Fender Play Winter Sale 2020
Post subject: Re: speaker load
Posted: Thu Nov 06, 2014 6:37 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
If you want to match the impedance for most power out, then yes, both speakers would have to be 16 ohms, as you noted the jacks are in parallel. However, it is not necessary to match the impedance, as long as you keep any mismatch to within a 2 to 1 ratio, high or low. Anything from 4 to 16 ohms would be fine with the DR or DRRI. Fender included the external jack for another speaker to be connected with the internal, and since most speakers that Fender uses are 8 ohms, it was expected that two speakers used together (in parallel) would give 4 ohms total.

As to the speaker cabs with two jacks, it seems that you are referring to an input from an amp and an output to connect to another speaker cab, and both jacks are in parallel, so it doesn't matter which jack is used. If this is the case, then connecting two of these speaker cabs together will connect the two in parallel. So if both are 8 ohm cabs, the total would be 4 ohms. If you connected two of these cabs, with the internal speaker, and all were 8 ohm speakers, then your total impedance would be 2.66 ohms, and although still acceptable, it probably wouldn't allow the best sound from the amp. I would stick to something within the 2 to 1 ratio.

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: speaker load
Posted: Thu Nov 06, 2014 7:21 pm
Offline
Amateur
Amateur

Joined: Mon Mar 16, 2009 10:21 am
Posts: 199
Location: Louisiana
Thanks. That's the way I see it. The same way. Both questions. I was not sure. safe mismatches also. Thanks again!


Top
Profile
Post subject: Re: speaker load
Posted: Fri Nov 07, 2014 2:54 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
[quote="shimmilou" However, it is not necessary to match the impedance, as long as you keep any mismatch to within a 2 to 1 ratio, high or low. Anything from 4 to 16 ohms would be fine

then your total impedance would be 2.66 ohms, and although still acceptable, .[/quote]


:?: ?

I would not use lower than 4 ohms load


Top
Profile
Post subject: Re: speaker load
Posted: Fri Nov 07, 2014 5:22 am
Offline
Amateur
Amateur

Joined: Mon Mar 16, 2009 10:21 am
Posts: 199
Location: Louisiana
Thanks guys. I have decided to get a 1x12' w/8ohm spk and/or a 4x12 @ 8ohm cab I have already. But good to understand how it's setup.


Top
Profile
Post subject: Re: speaker load
Posted: Fri Nov 07, 2014 11:13 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
stratele52 wrote:
shimmilou wrote:
However, it is not necessary to match the impedance, as long as you keep any mismatch to within a 2 to 1 ratio, high or low. Anything from 4 to 16 ohms would be fine

then your total impedance would be 2.66 ohms, and although still acceptable, ...


:?: ?

I would not use lower than 4 ohms load


:lol:

It's better to have 4 to 16, but 2.66 would work, just not recommended.

Clear as mud?
:lol:

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: speaker load
Posted: Sun Nov 09, 2014 7:15 am
Offline
Amateur
Amateur

Joined: Mon Mar 16, 2009 10:21 am
Posts: 199
Location: Louisiana
thanks for the help!


Top
Profile
Post subject: Re: speaker load
Posted: Sun Nov 09, 2014 7:51 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
shimmilou wrote:
stratele52 wrote:
shimmilou wrote:
However, it is not necessary to match the impedance, as long as you keep any mismatch to within a 2 to 1 ratio, high or low. Anything from 4 to 16 ohms would be fine

then your total impedance would be 2.66 ohms, and although still acceptable, ...


:?: ?

I would not use lower than 4 ohms load


:lol:

It's better to have 4 to 16, but 2.66 would work, just not recommended.

Clear as mud?
:lol:



+1


Top
Profile
Post subject: Re: speaker load
Posted: Sun Nov 09, 2014 4:00 pm
Offline
Aspiring Musician
Aspiring Musician
User avatar

Joined: Sun Apr 14, 2013 4:41 pm
Posts: 764
Location: Sydney. Australia
Did you try it with 2 speakers and how do you like the sound?


Top
Profile
Post subject: Re: speaker load
Posted: Sun Nov 09, 2014 5:51 pm
Offline
Amateur
Amateur

Joined: Mon Mar 16, 2009 10:21 am
Posts: 199
Location: Louisiana
No. I have not. Playing with a 4x12 for now. But I'm about to get a nice 1x12 and put a quality 8ohm speaker in it. Decided not to go with the 2x12 so it's not an issue.


Top
Profile
Post subject: Re: speaker load
Posted: Sun Nov 30, 2014 9:58 pm
Offline
Amateur
Amateur

Joined: Mon Mar 16, 2009 10:21 am
Posts: 199
Location: Louisiana
Well...change of plan. Tommorrow I'll order a 2x12 cab...Vibroking 212B. It sizes up perfectly for this head. It's a 4 ohm cab so it has to be two 8 ohm spks wired in parallel.I'll try it and if I notice any issues I'll buy two 16 ohm speakers and swap em out. That'll take care of the 8ohm load/cab issue once and for all! It comes with V30's. I have two new Heritage G12H's (8ohm...sure wish they were 16!)


Top
Profile
Post subject: Re: speaker load
Posted: Thu Dec 04, 2014 8:05 pm
Offline
Amateur
Amateur

Joined: Mon Mar 16, 2009 10:21 am
Posts: 199
Location: Louisiana
I received the 2x12 cab. 4ohm cab. Pulled the front grill off and confirmed two 8ohm v30's.plugged in. Sounds ok. Only had about a half hour.Can't say I notice anything different although it,s hard to compare with a short term memory!What difference should I hear? How is the amps optimum performance affected? Should it be stronger,weaker? Too strong?Is it a risk of damaging the amp if played hard and for a good length of time?


Top
Profile
Post subject: Re: speaker load
Posted: Fri Dec 05, 2014 12:16 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
You might notice less volume, although maybe not since you are using two speakers instead of one, and/or a difference in the level of volume where breakup begins. Or, you might not notice any difference, as the speakers play a role in the sound production.

With a speaker impedance other than "matched", the amp will produce less power. The speakers' efficiency could make up any difference, if there is any difference to notice.

There is no problem playing long, hard and loud, the amp can handle a 4 ohm load just fine. The danger really lies in the fact that the amp sounds great and you can't stop playing until your hands cramp up. :lol:

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: speaker load
Posted: Fri Dec 05, 2014 5:30 am
Offline
Amateur
Amateur

Joined: Mon Mar 16, 2009 10:21 am
Posts: 199
Location: Louisiana
Thanks Shi. I was anxious for the reply. I will stick with my origional plan of using the two 30w 8 ohm G12H Heritage speakers i have boxed up. AND SEE HOW I LIKE IT. i DONT CARE MUCH FOR v30S. tHANKS!
Well I did and it sounds great! Really can't say I notice any diff between the 8 and 16ohm with this amp although I'm just really getting started. Thanks!


Top
Profile
Post subject: Re: speaker load
Posted: Sun Dec 21, 2014 8:04 am
Offline
Amateur
Amateur

Joined: Mon Mar 16, 2009 10:21 am
Posts: 199
Location: Louisiana
Sounds great!


Top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next
Go to page 1, 2  Next

All times are UTC - 7 hours

Fender Play Winter Sale 2020

Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to: