Genzler Amplification Club

[dwellers]

From the MG800 manual:

INPUT – The MAGELLANTM 800 is equipped with a standard 1⁄4” unbalanced input. The input stage contains an FET input amp circuit with an input impedance of 1Meg ohms, a precision high order active high pass filter, and an “RFI” filter (radio frequency interference) to eliminate unwanted noise.

 

[Loring]

I hope you enjoy the drive channel.

Also if its true that the HPF is at 30hz I'm very glad I changed my active preamp. I can't stand when the bass frequency on a preamp is at 30hz, I'm high passing that area in post for recordings anyway and I don't enjoy cutting on a bass control. I like the 70hz control on my new preamp ran flat or with a touch of boost.

If you are running a 5 string you may want to move to 60 to at least capture the first harmonic. I find the 30 on the genzler does remove the useless noise but still brings the presence.

 

[EncoremMP]

Both taken directly from Jeff G. on this forum:

The HPF is preset at just under 30 Hz. It offers excellent subsonic protection and helps deliver the deep, tight, low frequencies of the Magellan 800.

@SteveC Yes the MG800 and MG350 have the same HPF circuitry. Set at just under 30 Hz.

Jeff Genzler
Founder ----
GENZLER AMPLIFICATION

 

[Loring]

Should also be noted - if using the drive channel - some of the lowest frequencies do get attenuated also.

 

[DingwallDingus]

Should also be noted - if using the drive channel - some of the lowest frequencies do get attenuated also.

This makes sense although it reaches pretty far down compared to a Darkglass B7k in raw mode, which I enjoy personally! Regarding the preamp thing, yeah at around 30hz is probably the highest I would high pass to normally on a master bus for most bass applications.

I dig the 70hz control on the preamp in terms of the audible range it occupies, more in between that felt and heard region. The 30hz is all true sub bass which isn't crazy useful for an onboard preamp imo, atleast for my uses.

 

[SteveC]

Hey Genzler buds...do you use/recommend a high pass filter (HPF) on your pedalboard? Do the Magellan heads have built-in HPFs of some kind negating the need for an external box? I know that HPFs work quite differently than traditional EQ to filter out deep unwanted frequencies.

TIA!

This is why I decided to not get a HPF pedal or device. My Genzler head has one, and for my DI gigs I have the sound guy put one on at about the same place.

 

[Loring]

This is why I decided to not get a HPF pedal or device. My Genzler head has one, and for my DI gigs I have the sound guy put one on at about the same place.

What would be a good question - is there an HPF for the DI out?
Pre and post? Just post? Neither?

@Jeff Genzler ?

 

[DingwallDingus]

What would be a good question - is there an HPF for the DI out?
Pre and post? Just post? Neither?

@Jeff Genzler ?

I'm assuming it would be post right? It accounts for the fx loop in post which is great so I see no reason it wouldn't account for the HPF, but I'm curious too now.

 

[Loring]

I'm assuming it would be post right? It accounts for the fx loop in post which is great so I see no reason it wouldn't account for the HPF, but I'm curious too now.

Depends on when the hpf is implemented.

 

[Fishface]

Here is says it is at the INPUT stage, which affects everything after INPUT:

The input stage contains an FET input amp circuit with an input impedance of 1Meg ohms, a precision high order active high pass filter

 

[Loring]

Here is says it is at the INPUT stage, which affects everything after INPUT:

Yes it also says there’s a FET amp at the input stage so when you go DI pre - it bypasses the preamp is the hpf before or after? Makes sense to be before the preamp but when you bypass to the DI ie pre vs post does it bypass the hpf as well?

 

[User363432]

I have always wished they would give the OPTION regarding a HPF. A little button to turn it ON or OFF.
Many may like the HPF on.. Some don't . Good technique and controlled playing and using your ears can go a long way.. It's hard to put something back that isn't there. Not everyone runs their EQ at 12 o'clock.
It's a FEEL thing .

 

[DingwallDingus]

I have always wished they would give the OPTION regarding a HPF. A little button to turn it ON or OFF.
Many may like the HPF on.. Some don't . Good technique and controlled playing and using your ears can go a long way.. It's hard to put something back that isn't there. Not everyone runs their EQ at 12 o'clock.
It's a FEEL thing .

I understand that but are you really going to miss the mud at 30hz and down that much? I would guess not for most applications unless you were trying to make some dubstep sounding stuff or 808 trap bass drops. I still do understand the mentality of have it if you want it though.

 

[Loring]

I have always wished they would give the OPTION regarding a HPF. A little button to turn it ON or OFF.
Many may like the HPF on.. Some don't . Good technique and controlled playing and using your ears can go a long way.. It's hard to put something back that isn't there. Not everyone runs their EQ at 12 o'clock.
It's a FEEL thing .

You’re not hearing anything but noise below 30hz, speakers aren’t producing it and all your doing is robbing your amp of power.

Most people listening to their low B are hearing first and second harmonic with hardly any fundamental. There’s a reason most studios and sound men but an hpf on almost every channel - including the bass. If you don’t have a 5 - you could put the hpf at 40... and not miss a thing.

 

[dwellers]

Good discussion on the HPF. Always entertaining and informative!

 

[Jeff Genzler]

Yes it also says there’s a FET amp at the input stage so when you go DI pre - it bypasses the preamp is the hpf before or after? Makes sense to be before the preamp but when you bypass to the DI ie pre vs post does it bypass the hpf as well?

Just to clarify regarding the HPF impact on the DI signal ---- in the PRE position of the DI the signal is coming directly from the INPUT circuitry and the PAD switch---so there would be NO HPF in the DI Signal. But most quality mixers will have a channel assignable HPF or some other option at the board. In the POST position on the Magellan's DI, then our internal HPF will be in the signal chain. this is for both the MG-350 and MG-800.
Also, using the GAIN control on the DRIVE channel will impact the HPF content ---- the higher the GAIN setting the higher the HPF is set, this helps to clean up LF clutter as the signal overdrives in the DRIVE Channel. And the B (AMPBER) contour also will "roll-up" the HPF as the CONTOUR control is increased.

I hope this is useful.

 

[Fishface]

Good to know. Makes sense that the HPF would not be included in the DI when in Pre position.
Thanks for clarifying.

 

[Fishface]

BTW... I always use post and always get a smiling nod from the sound guys. EQ is usually flat with a bit of either contour (depending on my mood) on the clean channel.

 

[User363432]

I hear what you're saying.
Some folks fight the idea of NO HPF.
No HPF is not a sin or a bad thing.
Some people LOVE them and some don't.
I see more engineers HPF guitars to get them out of the way in slotting a mix.

It's not so much one is hearing that deep and low, but it's the way it feels in a band. Not everyone gets to play thru a PA. It's adds a 3D FEEL and it's that BOUNCE . And its impossible to EQ in something that is stripped away up front.

personally, I wouldn't worry about running out of power because any ( said amp) may not have a HPF.
If an amp is capable of putting out 800 watts , then running out of power shouldn't be a thing to worry about. It's gonna be way louder than most would ever need on a reasonable club gig.

You’re not hearing anything but noise below 30hz, speakers aren’t producing it and all your doing is robbing your amp of power.

Most people listening to their low B are hearing first and second harmonic with hardly any fundamental. There’s a reason most studios and sound men but an hpf on almost every channel - including the bass. If you don’t have a 5 - you could put the hpf at 40... and not miss a thing.

 

[LightForce104]

I hear what you're saying.
Some folks fight the idea of NO HPF.
No HPF is not a sin or a bad thing.
Some people LOVE them and some don't.
I see more engineers HPF guitars to get them out of the way in slotting a mix.

It's not so much one is hearing that deep and low, but it's the way it feels in a band. Not everyone gets to play thru a PA. It's adds a 3D FEEL and it's that BOUNCE . And its impossible to EQ in something that is stripped away up front.

personally, I wouldn't worry about running out of power because any ( said amp) may not have a HPF.
If an amp is capable of putting out 800 watts , then running out of power shouldn't be a thing to worry about. It's gonna be way louder than most would ever need on a reasonable club gig.

You know almost every amp has an HPF built in, right?