Jad Freer Sisma Mega Thread.

[Admiral Akbar]

Back in the 'early '70s when I was at (probably) a similar stage as Franz in my bass education, there was no TB or anything like it to go to to learn from. Books, magazine articles, music store employees, older musicians I got to know, etc., is where I learned about all this stuff. Now, we have the world library, the interwebz to gain knowledge.

We had to actively seek out magazines, people in the flesh, and most especially (and most importantly!) live shows to learn this information first hand.

I suspect Franz, like we did, is out at live shows learning what sounds best and moves him the most.

 

[Franz975]

You’re young.

Stick around long enough, and your BACK (spinal column and associated muscles) will begin to tell you which sounds better: an Ampeg SVT or a class D head!

This is the stupidest thing I ever seen. Use your ears

The sound quality is not about the weight, it is about the tone.

My back will tell me the one that is the easiest to carry around

@Andrea Lo

 

[Franz975]

We had to actively seek out magazines, people in the flesh, and most especially (and most importantly!) live shows to learn this information first hand.

I suspect Franz, like we did, is out at live shows learning what sounds best and moves him the most.

I don't say which one is the best according to a demo on youtube. I just explain what I prefer at live show yep

 

[agedhorse]

This is the stupidest thing I ever seen. Use your ears

The sound quality is not about the weight, it is about the tone.

Again, you are young and not understanding his comment in context.

It’s all about compromise, that’s what experience helps you understand. For example, would you play a large 200 pound cabinet because it sounds better to you than a smaller 50 pound cabinet, especially if you have to transport it by yourself?

It’s all about context, that’s the reason that amps and cabinets have gotten smaller and lighter, bass players have been driving this trend for years. In the guitar world, this is just beginning to happen, but it will be slower because guitar players are more rooted in tradition and less willing to evolve.

 

[DJ Bebop]

It’s all about context, that’s the reason that amps and cabinets have gotten smaller and lighter, bass players have been driving this trend for years. In the guitar world, this is just beginning to happen, but it will be slower because guitar players are more rooted in tradition and less willing to evolve.

 

[Franz975]

Again, you are young and not understanding his comment in context.

It’s all about compromise, that’s what experience helps you understand. For example, would you play a large 200 pound cabinet because it sounds better to you than a smaller 50 pound cabinet, especially if you have to transport it by yourself?

It’s all about context, that’s the reason that amps and cabinets have gotten smaller and lighter, bass players have been driving this trend for years. In the guitar world, this is just beginning to happen, but it will be slower because guitar players are more rooted in tradition and less willing to evolve.

Yeah sure.

But I wouldn't say that something sound better than something else because it is lighter.

My Bergantino cabinet is light and sound better than a lot of cabinets to me, even other that are way heavier.

If I can try and afford Jad Freer cabinet in the futur I will definitely use those. Ceramic magnet have a better punch.

 

[Jim C]

It's a pity that there are so few Jad Freer Sisma products sold.
Otherwise this thread could have a specific topic and not contain so much BS.

@Franz975, perhaps you could explain how the magnetic field of different types magnets could change the tone of speakers. Are some magnets better for audio than others? What brings you to this conclusion? Is there math to support this physics / audio based comment?

I've owned Bergantino's with both ceramic and neo magnets and didn't hear more "punch" with all things being equal.

 

[Franz975]

It's a pity that there are so few Jad Freer Sisma products sold.
Otherwise this thread could have a specific topic and not contain so much BS.

@Franz975, perhaps you could explain how the magnetic field of different types magnets could change the tone of speakers. Are some magnets better for audio than others? What brings you to this conclusion? Is there math to support this physics / audio based comment?

I've owned Bergantino's with both ceramic and neo magnets and didn't hear more "punch" with all things being equal.

Yes we need to stop talking about other things than the Sisma.

(The Ceramic are known for having more punch, @Andrea Lo can explain why maybe. It is not only my opinion and even Jim Bergantino will explain the same thing about how a Ceramic sound compare to a Neo)

 

[Rumblefisher]

I find the Sisma a very intriguing product, and I am very close to buying a Coda to pair with my Dicosmo 800RB for a “present day 90s” GK rig …or maybe a sisma bc it probably has the same power section as the coda. @Andrea Lo is it a Pascal module or JF Original?

 

[Franz975]

I find the Sisma a very intriguing product, and I am very close to buying a Coda to pair with my Dicosmo 800RB for a “present day 90s” GK rig …or maybe a sisma bc it probably has the same power section as the coda. @Andrea Lo is it a Pascal module or JF Original?

The Power amp is a design by JF if it is what you ask. Most part are custom made for them

 

[Andrea Lo]

I find the Sisma a very intriguing product, and I am very close to buying a Coda to pair with my Dicosmo 800RB for a “present day 90s” GK rig …or maybe a sisma bc it probably has the same power section as the coda. @Andrea Lo is it a Pascal module or JF Original?

Hi, our circuits are designed in the house. Sisma and Coda share the same class G power amp section. We have tested almost every Class D module available or other proprietary designs, like Markbass, and the Pascal is our preferite Class D module, luckly for us we kept on preferring our Class G over the Pascal since the latter is very expensive.

@Franz975 I'd like to keep this thread relevant to the SISMA amp, I like to hear from people who are using one or have been testing one. But also hear other people stories and perspectives.

I'm happy to share my experience as player and a tester, but long story short: we tried almost everything, blow a lot of woofers, burn a lot of amps and we ended up with our recipe of old and new, that is traditional amp designs in a compact format and ceramic woofers on lighter cabs. Some reasons are subjective, some other are objective, none are market influenced since we don't aim at big numbers, we could not handle them.

It's good to keep an open ear, learn from the schooled, and make your own choice and mistakes. Ironically I really started to throw money in the bin after learning that 1W is 1W and comparing cabs looking at declared specs on eary 2000's internet sites. So my only advice is to go and find whats good for you.

 

[DJ Bebop]

Hi, our circuits are designed in the house. Sisma and Coda share the same class G power amp section. We have tested almost every Class D module available or other proprietary designs, like Markbass, and the Pascal is our preferite Class D module, luckly for us we kept on preferring our Class G over the Pascal since the latter is very expensive.

Now this make sense as most people have tried to say there is no difference between the various classes of power amps. If then you can build a power section cheaper for your product line, yet manipulate it to get the sound you and others like out of it, so be it.
I don't see an issue. I have and like several class D amps that I got before I was hip to your offerings. I would have tried one or read about them before.

 

[Rumblefisher]

Sigh. I think you guys are gonna see a lot of pedals for sale later today to raise funds for a Coda or Sisma…depends on how much sells

 

[Andrea Lo]

Now this make sense as most people have tried to say there is no difference between the various classes of power amps.

They sound and perform completely different.

I still have a SISMA amp in the U.S. jumping around between Talk Bass members to try it out so anyone interested in playing one for a couple of weeks just DM me.

 

[Jeff Scott]

It’s all about context, that’s the reason that amps and cabinets have gotten smaller and lighter, bass players have been driving this trend for years. In the guitar world, this is just beginning to happen, but it will be slower because guitar players are more rooted in tradition and less willing to evolve.

I was think about this while watching Quest for Fire a couple nights ago.

 

[agedhorse]

@Franz975, perhaps you could explain how the magnetic field of different types magnets could change the tone of speakers. Are some magnets better for audio than others? What brings you to this conclusion? Is there math to support this physics / audio based comment?

I've owned Bergantino's with both ceramic and neo magnets and didn't hear more "punch" with all things being equal.

Agreed, I would be fascinated to hear the explanation as well.

Jim’s cabinets reinforce my earlier comments about how the perceptions of a cabinet’s performance are mostly based on the designer’s skill and intent. It’s not necessarily related to the magnetic material used. In fact, it’s usually unrelated in practice.

 

[agedhorse]

They sound and perform completely different.

I still have a SISMA amp in the U.S. jumping around between Talk Bass members to try it out so anyone interested in playing one for a couple of weeks just DM me.

Do your amps have FCC certification of compliance? If not, you may want to investigate the requirements.

 

[Andrea Lo]

Do your amps have FCC certification of compliance? If not, you may want to investigate the requirements.

We have CE but FCC is way to expensive for a small buildier.

 

[Franz975]

Hi, our circuits are designed in the house. Sisma and Coda share the same class G power amp section. We have tested almost every Class D module available or other proprietary designs, like Markbass, and the Pascal is our preferite Class D module, luckly for us we kept on preferring our Class G over the Pascal since the latter is very expensive.

@Franz975 I'd like to keep this thread relevant to the SISMA amp, I like to hear from people who are using one or have been testing one. But also hear other people stories and perspectives.

I'm happy to share my experience as player and a tester, but long story short: we tried almost everything, blow a lot of woofers, burn a lot of amps and we ended up with our recipe of old and new, that is traditional amp designs in a compact format and ceramic woofers on lighter cabs. Some reasons are subjective, some other are objective, none are market influenced since we don't aim at big numbers, we could not handle them.

It's good to keep an open ear, learn from the schooled, and make your own choice and mistakes. Ironically I really started to throw money in the bin after learning that 1W is 1W and comparing cabs looking at declared specs on eary 2000's internet sites. So my only advice is to go and find whats good for you.

How is that Pascal poweramp compare to other Class D ? I don't know if that is explainable

 

[Franz975]

We have CE but FCC is way to expensive for a small buildier.

I heard that FCC is 60K or something ?
I don't know a lot about those thing but I remember seeing that about a Bergantino product