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Hi all,
If I want to hook up an 8 ohm single speaker cabinet to my 4 ohm
fender amp, can I simply hook up a high voltage 8 ohm resister in
parallel with the 8 ohm speaker? And if so, what voltage do you
recommend for 40 watt amp?
Danny Snyder
actually if someone were to be so ind as too explain the whole impedance thing,
that would be awesome, because i was wondering what i could hook up my 4 ohm
peavey bass cab ( im guessing not the "8 oHM min". ext jack my amp has. )
Danny Snyder <> wrote: Hi all,
If I want to hook up an 8 ohm single speaker cabinet to my 4 ohm
fender amp, can I simply hook up a high voltage 8 ohm resister in
parallel with the 8 ohm speaker? And if so, what voltage do you
recommend for 40 watt amp?
Danny Snyder
.
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[Non-text portions of this message have been removed]
Yes you can, but...
You don't need a high voltage resistor but a high wattage resistor. At least
20Watt for a 40w amp.
Your speaker will take 1/2 of the power and the resistor will take the other
half that will be dispensed into heat.
In plain English: you'll end up with 20W sound and 20W heat.
Not very efficient.
You better just hook up the 8 Ohm speaker. That way you will lose a little
bit of power but not that much.
Roland Bettenville
-------Oorspronkelijk bericht-------
Van: Danny Snyder
Datum: 12/05/05 21:06:37
Aan:
Onderwerp: [SurfGuitar101] speaker impedence question
Hi all,
If I want to hook up an 8 ohm single speaker cabinet to my 4 ohm
fender amp, can I simply hook up a high voltage 8 ohm resister in
parallel with the 8 ohm speaker? And if so, what voltage do you
recommend for 40 watt amp?
Danny Snyder
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[Non-text portions of this message have been removed]
--- In , "Roland Bettenville"
<roland.bettenville@t...> wrote:
>
> Yes you can, but...
> You don't need a high voltage resistor but a high wattage resistor.
At least
> 20Watt for a 40w amp.
> Your speaker will take 1/2 of the power and the resistor will take
the other
> half that will be dispensed into heat.
> In plain English: you'll end up with 20W sound and 20W heat.
What if you just hook up a 4ohm amp into a 8ohm speaker? No wattage
resistor. Any danger anything will be damaged? (Clearly, you get
less power, but that's not what I'm concerned about - this is just a
temmporary situation I'm asking about.)
Ivan
Neal,
One impedance article, coming right up! <lol>
But I've got two other projects on my plate today,
so let me chime in with this for now, and I'll see
if I can write that little blurb late tonight. Or
else it'll have to be tomorrow, hope that works for
you. In the meantime, you can work with my answer to
Danny for hints on what you can hook up to your Peavey.
~!~!~!~!
Danny,
You don't need to add any other components to your
wiring. You can safely hook up an 8 ohm cabinet to
a 4 ohm output, and the only thing you might notice
would be a bit less overall volume, and possibly a
bit less high-end tone. Some folks claim that this
will make a speaker sound muddy, so listen carefully
before you decide that the sound is what you want.
Personally, I can't tell the difference if the speaker
is of good quality in the first place, but YMMV. <g>
Pay more attention to the power ratings. You don't
want to hook up, say a Celestion Vintage 25 watt unit
to your 40 watt head, particularly not at this
impedance mismatch. Always make sure the speaker can
take more than the amp can deliver. Otherwise, it's
all about the tone!
unlunf
--- In , "Neal S." <memoryover@y...> wrote:
>
> Actually if someone were to be so kind as too explain the
> whole impedance thing, that would be awesome, because i was
> wondering what i could hook up my 4 ohm peavey bass cab
> (I'm guessing not the "8 ohm min". ext jack my amp has.)
>
> Danny Snyder <snydr@s...> wrote:
>>
>> Hi all,
>>
>> If I want to hook up an 8 ohm single speaker cabinet to my
>> 4 ohm fender amp, can I simply hook up a high voltage 8 ohm
>> resister in parallel with the 8 ohm speaker? And if so, what
>> voltage do you recommend for 40 watt amp?
>>
>> Danny Snyder
>
For a transistor amp no danger at all.
Things are more complicated with tube amps.
Most tube amp guru's agree that there is no danger with a Fender tube amp. A
lot of people have done this before with no ill effect. It might change the
sound though. I'm not sure if it can be recommended for other brands like
Marchall or Vox.
Roland Bettenville
-------Oorspronkelijk bericht-------
Van: ipongrac
Datum: 12/05/05 22:15:21
Aan:
Onderwerp: [SurfGuitar101] Re: speaker impedence question
--- In , "Roland Bettenville"
<roland.bettenville@t...> wrote:
>
> Yes you can, but...
> You don't need a high voltage resistor but a high wattage resistor.
At least
> 20Watt for a 40w amp.
> Your speaker will take 1/2 of the power and the resistor will take
the other
> half that will be dispensed into heat.
> In plain English: you'll end up with 20W sound and 20W heat.
What if you just hook up a 4ohm amp into a 8ohm speaker? No wattage
resistor. Any danger anything will be damaged? (Clearly, you get
less power, but that's not what I'm concerned about - this is just a
temmporary situation I'm asking about.)
Ivan
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[Non-text portions of this message have been removed]
Do NOT hook up your speaker with a big resistor in the circuit.....looks good
on paper but resistance is NOT impedance.. and it sounds awful!!!!!...I run all
my Dual Showman Reverbs (Twins) with 4 ohm output transformers into 8 ohm
single 15 cabs....no problems..... 16 ohms or 2 ohms aren't too cool but the
Fender can handle the 8 ohm load all day......They say a 4 ohm Twin can work
a 2 ohm load but that is approaching a short circuit and I feel the tranny
would really get hot and that's not good......I have done it on short hauls but
NOT for bass instuments and I also use cooling fans inside my piggy back
heads.......I makes one hell of a difference on the amp temp........Gerald
Weber has a good section in his book on impedance loads and what to expect by
swapping things around......good reading.......best ol luck and great reverbs,
eddie k
unlunf <> wrote: Neal,
One impedance article, coming right up! <lol>
But I've got two other projects on my plate today,
so let me chime in with this for now, and I'll see
if I can write that little blurb late tonight. Or
else it'll have to be tomorrow, hope that works for
you. In the meantime, you can work with my answer to
Danny for hints on what you can hook up to your Peavey.
~!~!~!~!
Danny,
You don't need to add any other components to your
wiring. You can safely hook up an 8 ohm cabinet to
a 4 ohm output, and the only thing you might notice
would be a bit less overall volume, and possibly a
bit less high-end tone. Some folks claim that this
will make a speaker sound muddy, so listen carefully
before you decide that the sound is what you want.
Personally, I can't tell the difference if the speaker
is of good quality in the first place, but YMMV. <g>
Pay more attention to the power ratings. You don't
want to hook up, say a Celestion Vintage 25 watt unit
to your 40 watt head, particularly not at this
impedance mismatch. Always make sure the speaker can
take more than the amp can deliver. Otherwise, it's
all about the tone!
unlunf
--- In , "Neal S." <memoryover@y...> wrote:
>
> Actually if someone were to be so kind as too explain the
> whole impedance thing, that would be awesome, because i was
> wondering what i could hook up my 4 ohm peavey bass cab
> (I'm guessing not the "8 ohm min". ext jack my amp has.)
>
> Danny Snyder <snydr@s...> wrote:
>>
>> Hi all,
>>
>> If I want to hook up an 8 ohm single speaker cabinet to my
>> 4 ohm fender amp, can I simply hook up a high voltage 8 ohm
>> resister in parallel with the 8 ohm speaker? And if so, what
>> voltage do you recommend for 40 watt amp?
>>
>> Danny Snyder
>
.
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[Non-text portions of this message have been removed]
thanks unlunf, im looking forward to it !
neal
unlunf <> wrote: Neal,
One impedance article, coming right up! <lol>
But I've got two other projects on my plate today,
so let me chime in with this for now, and I'll see
if I can write that little blurb late tonight. Or
else it'll have to be tomorrow, hope that works for
you. In the meantime, you can work with my answer to
Danny for hints on what you can hook up to your Peavey.
~!~!~!~!
Danny,
You don't need to add any other components to your
wiring. You can safely hook up an 8 ohm cabinet to
a 4 ohm output, and the only thing you might notice
would be a bit less overall volume, and possibly a
bit less high-end tone. Some folks claim that this
will make a speaker sound muddy, so listen carefully
before you decide that the sound is what you want.
Personally, I can't tell the difference if the speaker
is of good quality in the first place, but YMMV. <g>
Pay more attention to the power ratings. You don't
want to hook up, say a Celestion Vintage 25 watt unit
to your 40 watt head, particularly not at this
impedance mismatch. Always make sure the speaker can
take more than the amp can deliver. Otherwise, it's
all about the tone!
unlunf
--- In , "Neal S." <memoryover@y...> wrote:
>
> Actually if someone were to be so kind as too explain the
> whole impedance thing, that would be awesome, because i was
> wondering what i could hook up my 4 ohm peavey bass cab
> (I'm guessing not the "8 ohm min". ext jack my amp has.)
>
> Danny Snyder <snydr@s...> wrote:
>>
>> Hi all,
>>
>> If I want to hook up an 8 ohm single speaker cabinet to my
>> 4 ohm fender amp, can I simply hook up a high voltage 8 ohm
>> resister in parallel with the 8 ohm speaker? And if so, what
>> voltage do you recommend for 40 watt amp?
>>
>> Danny Snyder
>
.
Visit for archived messages,
bookmarks, files, polls, etc.
SPONSORED LINKS
Guitar music theory
Stringed instruments Guitar music book
Guitar sheet music Guitar music sheets
Guitar technique
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---------------------------------
[Non-text portions of this message have been removed]
Eddie,
> Gerald Weber has a good section in his book on
> impedance loads and what to expect by swapping
> things around......good reading
Where did you see that particular article? I
don't have his newest book/cd yet, so is it in
there?
unlunf
