Hey there Bob,
The way I was relating to the Impedance and Power was purely Electronic Theory. Watts Law.
So what you're saying is that the Amp is designed for Output Power of 100watts into an 8-ohm or 4-ohm load, Impedance selector set at 8 or 4-ohm total load.
So, the Impedance Selector Factor is just one of many new things I'll learn stepping into the "Tube World". I've never dealt with adding cabs to any Tube system, so I didn't know they were designed to react the same power-wise to varied loads.
Either way, it doesn't matter. My two 15's will move more than enough Air to create plenty of Sound Pressure for my 72 FireGlo to be both Felt and Heard.
Hey Jeffrey,
That rig looks great! I'm sure that's lots of fun.
Togther Soon - 72 Rick & Ampeg B-15R 2-15 Stack!
Moderators: rickenbrother, ajish4
http://www.myspace.com/greenvilleglorylane
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
Hey again Bob,
I just finished reading a new User Review feature, just added to Harmony Central, on the B-15R.
One in particular was a guy who bought the complete 2-15 stack, like I'll have, and has used it for a number of years in a Heavy Country Band I think he said. He gave it a 9 out of 10 rating based on "Low Power". The thing he sited as the problem was Stage Volume, that when the Band and primarily the Lead Guitarist start ramping hard at the end of the night that he starts to diminish in the on-stage sound. So that totally agrees with your position.
I don't believe that's going to be an issue in our band. But, I don't think I'd feel any shame in adding a little more speaker size to a Bass Monitor though. I'd still be standing in front of one cool *** Bass Rig.
He did say though, that the XLR-Line Out provides Outstanding Bass Sound to the PA.
He also added major plus comments on Tone and reliability! Those are some of the most important considerations for me.
I just finished reading a new User Review feature, just added to Harmony Central, on the B-15R.
One in particular was a guy who bought the complete 2-15 stack, like I'll have, and has used it for a number of years in a Heavy Country Band I think he said. He gave it a 9 out of 10 rating based on "Low Power". The thing he sited as the problem was Stage Volume, that when the Band and primarily the Lead Guitarist start ramping hard at the end of the night that he starts to diminish in the on-stage sound. So that totally agrees with your position.
I don't believe that's going to be an issue in our band. But, I don't think I'd feel any shame in adding a little more speaker size to a Bass Monitor though. I'd still be standing in front of one cool *** Bass Rig.
He did say though, that the XLR-Line Out provides Outstanding Bass Sound to the PA.
He also added major plus comments on Tone and reliability! Those are some of the most important considerations for me.
http://www.myspace.com/greenvilleglorylane
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
"So what you're saying is that the Amp is designed for Output Power of 100watts into an 8-ohm or 4-ohm load, Impedance selector set at 8 or 4-ohm total load."
Yes. Tube output stages have a fairly high output impedance and a transformer is used to "transform" that high output impedance to the low impedance speaker cabs need. The transformer always loads the tube section correctly so the tubes can deliver their max at all times, providing there is a correct match on the output side of the tranny.
Except for the small losses in the output tranny, (if designed correctly), you will be able to get max out into any load the output can be switched to. Usually 4 and 8 ohm, or 2 or 4 ohm, sometimes all three, depends on the amp design. Just tally up the cab load, make sure you have the power wattage covered (don't want to fry a speaker VC), and rock out like Motorhead!
"I don't believe that's going to be an issue in our band."
Yeah, but in the heat of the moment... Just carry a Tazer for the lead guitarist when he starts to get out of hand. Used at the right moment people will think it is part of the performance!!
Yes. Tube output stages have a fairly high output impedance and a transformer is used to "transform" that high output impedance to the low impedance speaker cabs need. The transformer always loads the tube section correctly so the tubes can deliver their max at all times, providing there is a correct match on the output side of the tranny.
Except for the small losses in the output tranny, (if designed correctly), you will be able to get max out into any load the output can be switched to. Usually 4 and 8 ohm, or 2 or 4 ohm, sometimes all three, depends on the amp design. Just tally up the cab load, make sure you have the power wattage covered (don't want to fry a speaker VC), and rock out like Motorhead!
"I don't believe that's going to be an issue in our band."
Yeah, but in the heat of the moment... Just carry a Tazer for the lead guitarist when he starts to get out of hand. Used at the right moment people will think it is part of the performance!!
Yes that is why I use an SVT it has much more head room than a V4-B (which is really what you are buying, a modern one) They are great sounding amps but at the end of the night as John puts it "in the heat of the battle" the guitar players can never drown you out with a tube SVT. A V4-B will only get to a certain volume and won't go no louder, SVT's are only idling at usual stage volumes, V4-B's are working hard. If you really want to punch that E string for emphasis it just won't be there with a 100 watt amp usually. SVT's were designed during the days when 100 watt Marshalls with no master volumes were the epitome of sound and they were loud! SVT's were really the only amp made that could not only keep up with them but surpass them and still sound clear and punchy.
If you need more power you can always do what I did, take the head out and use an SVT head with both bottoms, sounds really sweet and punchy for small to medium sized rooms.
This being said that is still a really cool amp and I have considered buying one myself before. I would probably buy a couple of 60 watt B-15S's though instead.
If you need more power you can always do what I did, take the head out and use an SVT head with both bottoms, sounds really sweet and punchy for small to medium sized rooms.
This being said that is still a really cool amp and I have considered buying one myself before. I would probably buy a couple of 60 watt B-15S's though instead.
Hey John and Bob,
You guys are great.
I've got a friend who's suggesting I start looking for another B-15E extension cab, for the Second Stack!
But, I don't have another Bass I'm willing to expend towards that end.
Another thing regarding the "Tazer"! The only Guitarist in our band, right now, is my Wife! I'd expect, when she got back up, for her to "Pete Townsend" me with her Rick 610!
You guys are great.
I've got a friend who's suggesting I start looking for another B-15E extension cab, for the Second Stack!
But, I don't have another Bass I'm willing to expend towards that end.
Another thing regarding the "Tazer"! The only Guitarist in our band, right now, is my Wife! I'd expect, when she got back up, for her to "Pete Townsend" me with her Rick 610!
http://www.myspace.com/greenvilleglorylane
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
YES!
It really does change things a bit.
"She's strictly Rhythm, she doesn't want to make it Cry or Sing"! She could be called "Guitar Glory" and she really does know (maybe not all, but) allot of Chords!
Anyway it's our Keyboard player that fills the Lead roll, behind my wife's Vocals that is.
It really does change things a bit.
"She's strictly Rhythm, she doesn't want to make it Cry or Sing"! She could be called "Guitar Glory" and she really does know (maybe not all, but) allot of Chords!
Anyway it's our Keyboard player that fills the Lead roll, behind my wife's Vocals that is.
http://www.myspace.com/greenvilleglorylane
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
It's quite cool actually.
Here's a link to our Bands myspace site. We have four Original Rock tunes from a previous project up as an example of what we sound like and what we can do. Greenville is Blues/Country/Rock Ballads, so what you'll hear is different from how we are now.
http://www.myspace.com/greenvilleglorylane
Here's a link to our Bands myspace site. We have four Original Rock tunes from a previous project up as an example of what we sound like and what we can do. Greenville is Blues/Country/Rock Ballads, so what you'll hear is different from how we are now.
http://www.myspace.com/greenvilleglorylane
http://www.myspace.com/greenvilleglorylane
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
Here it is!
She sounds as Hot as she Looks!
She sounds as Hot as she Looks!
http://www.myspace.com/greenvilleglorylane
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)
Rickenbacker; '72 FireGlo 4001, '81 JetGlo 4001. '90 Alembic Flame-Koa Persuader.
Custom Hand-Made(Self) 4-String Natural Maple Bass.
Ampeg B-15R & B-15E Bass Amp (2-15 All-Tube 100w Stack, both S/N 1)