once and for all - Speakers - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps

Instruments and Amps Everything that makes music, Especially including instrument amps.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th July 2005, 06:10 PM   #1
amirmk is offline amirmk  Israel
diyAudio Member
 
Join Date: Nov 2004
Location: Israel
Default once and for all - Speakers

I'm building a guitar amplifier head, it's a 50W Vox.
How can i tell what kind of cabinet is too much for it?
Let's say i'm using 12" 8 ohm loudspeakers, it also says 300W peak.
I will be using four, if i'll connect them so they will keep their 8 ohm resistance, could i use it with that amplifier? How about 16 ohms? would wiring the 8 ohm so i would get 2 ohms, or the 16 so i would get 4 ohm be louder, or just easier on the amp?

Can i damage the amp?
  Reply With Quote
Old 20th July 2005, 02:58 PM   #2
Giaime is offline Giaime  Italy
diyAudio Member
 
Giaime's Avatar
 
Join Date: Oct 2004
Send a message via MSN to Giaime
First, it's a tube amp? You can do whatever you like about speakers, provided that the total impedance of all of them connected like you want to do is that impedance that the amp wants to see. If it's tube and you've got an 8 ohm output transformer, it's better to place an 8ohm load. Whatever mismatch you do won't be dangerous but not advisable, but some people think that it will give better sound to mismatch. However keep mismatching on 2:1 or 1:2 not more.
  Reply With Quote
Old 22nd July 2005, 06:42 PM   #3
diyAudio Member
 
Join Date: Apr 2005
Location: So. Illinois
Default Speakers for a 50 watt head

I like to keep the capability of the speakers down to less than three times the amp to get the extra output from the higher eff.
In the case of a 4-speaker cab, I would go for four 28 watt Jensens or two Jensens and two Emminence 30 watt. Depends a lot on how and what you play. A couple of 300 watt speakers will never blow up (I know, never say never) but the sound could be a lot better with only 155 watts of speaker capacity on that tube amp. Shields up!!! IMHO!
  Reply With Quote
Old 30th July 2005, 10:30 PM   #4
amirmk is offline amirmk  Israel
diyAudio Member
 
Join Date: Nov 2004
Location: Israel
Let me get this right, if the output of the amp, a tube amp, is in the limits of the speaker, it will not damage it, but what if its above it's maximum ratings? would that be dangerous?
  Reply With Quote
Old 31st July 2005, 05:40 PM   #5
diyAudio Member
 
Join Date: Apr 2005
Location: So. Illinois
Default What won't damage what?

It isn't quite clear which part of the system you are talking about damaging but I always avoid more amp than speaker capacity for two reasons. You have the ability to blow the voice coils and, if you do, you can then blow the amp. I simply try to run the highest eff. speaker set that exceeds the amps output by at least 50%. Higher works but you lose some eff. in the process. A lot of people think that tube amps are the only ones that can be damaged by failing speakers. Solid-state amps can be also. A good set of speakers can also be ruined with an amp with severe clipping or DC factor even if the amp is 1/3 the capacity of the speakers. OK, IMHO.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Studio monitor speakers as Hi Fi speakers? MRod Multi-Way 2 27th March 2009 06:07 AM
Built differences between Guitar Speakers and PA Speakers? agadis PA Systems 7 24th September 2007 09:22 AM
How would you compare your DIY speakers to commercial speakers? AJ Bertelson Multi-Way 20 28th May 2004 04:20 PM
Car Speakers in Theatre Speakers NEED HELP FAST!!! Psionic Multi-Way 9 3rd March 2003 12:11 PM


New To Site? Need Help?

All times are GMT. The time now is 07:38 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2