GR Bass review

[Mr123Clark]

Yep fair points! Overall still in love with the cab - Definitely not a dealbreaking problem with the vibrations just more of an observation that it's much more noticeable than my V4b with a 410 or my Super Bassman and 610. I don't typically bring a mic stand out so fine with just picks in the pocket and water on the floor!

Anyone ever try an Auralex Gramma pad? The link below might help with vibrations but price seems a bit steep for such a minor problem.

Auralex BabyGRAMMA v2 Isolation Riser

 

[Mr123Clark]

I've been using mine along with the occasional 115 addition for about 3 months now and have played some larger events and smaller rooms and have been constantly pleased with these cabs, and so has rest of the band.
In regard to volume adjustments, I've set my volume's according at sound checks, generally + - 1/2 way and if I need to alter at all, it will come from my preamp (or bass)I never max out my volume on sound checks, sound tech will adjust house accordingly.
The cab is going to vibrate, but what high volume bass cab doesn't. A foam pad will help, but personally I never put anything on top of a cab I don't expect to fall off, especially a liquid. It is a active cab, do you really want to take a chance of pouring water into your power amp?

Just my 2 cents, take it for what it worth

Do you notice any tonal differences controlling the volume with your preamp vs with the cab's volume itself?

 

[gtirard]

Yep fair points! Overall still in love with the cab - Definitely not a dealbreaking problem with the vibrations just more of an observation that it's much more noticeable than my V4b with a 410 or my Super Bassman and 610. I don't typically bring a mic stand out so fine with just picks in the pocket and water on the floor!

Anyone ever try an Auralex Gramma pad? The link below might help with vibrations but price seems a bit steep for such a minor problem.

Auralex BabyGRAMMA v2 Isolation Riser

My NF210V also vibrates, I suppose it's normal for this technology. My amp was sliding during rehearsal and I didn't want to take any risk, but I didn't want to invest in a Gramma pad, so I bought a cheap foam pad (just a few $). I put the foam pad between the cab and the amp (not underneath the cab). I works for me.

 

[Barticus]

Maybe the smaller cabs vibrate a bit more?
I put my 2U rack bag on top mine and have never had any vibration/slippage, maybe just the size/weight makes the difference. I had a 4U rack bag on my AT212 and Slim and never had issues there either.

 

[Randy W Lopez]

Do you notice any tonal differences controlling the volume with your preamp vs with the cab's volume itself?

No I didn't. The cab run's so clean.

 

[Zbysek]

Does anybody know what is the input impedance on the Dual Pre?

 

[Zbysek]

I've just received an answer from GR regarding the input impedance: it's 1 Mohm and can be modified to 5 Mohm upon request. I believe 1 Mohm is fine for David Gage Realist pickup, so I have no hesitations to use the amp or combo with upright...

Do you think it applies to Dual Pre as well?

 

[GR Bass Staff]

Hello,

The input impedance is 820k ohm

Does anybody know what is the input impedance on the Dual Pre?

 

[Zbysek]

Hello,

The input impedance is 820k ohm

Thank you!

One more question: What is the cutoff frequency and slope for HPF on Channel 2, please?

 

[GR Bass Staff]

For this info please send an email to [email protected]

Thank you!

One more question: What is the cutoff frequency and slope for HPF on Channel 2, please?

 

[Zbysek]

For this info please send an email to [email protected]

I have (this morning)...awaiting reply...

 

[GR Bass Staff]

They will surely reply to you within a few hours

I have (this morning)...awaiting reply...

 

[Barticus]

Thank you!

One more question: What is the cutoff frequency and slope for HPF on Channel 2, please?

Can you please post here once you have a response from GR?

 

[Zbysek]

Can you please post here once you have a response from GR?

Certainly

 

[Mr123Clark]

They will surely reply to you within a few hours

Hi GR Bass Staff - Quick Question - I have the AT 210 ACT amp - what level signal should I be running into it? Instrument level? Line Level? I'm using a Quad Cortex so I can control the output volume precisely but want to make sure I'm not running too hot or cool of a signal.

 

[Zbysek]

Can you please post here once you have a response from GR?

The HPF on Channel 2 has cutoff frequency at 1.2 kHz (F3) and slope 12 db per octave

 

[Redbrangus]

The HPF on Channel 2 has cutoff frequency at 1.2 kHz (F3) and slope 12 db per octave

Lemme see here... -3dB at 1.2k with a 12dB slope. So -15dB at 600Hz, -27dB at 300Hz, -39dB at 150Hz, etc. What is the purpose of this channel? It doesn't seem like it would be for amplifying a bass instrument. Or was maybe something lost in translation?

 

[Zbysek]

Lemme see here... -3dB at 1.2k with a 12dB slope. So -15dB at 600Hz, -27dB at 300Hz, -39dB at 150Hz, etc. What is the purpose of this channel? It doesn't seem like it would be for amplifying a bass instrument.

My understanding is that, with HPF activated, the channel becomes basically bi-amped: clean tone below 1.2KHz, overdriven tone above that...

Edit: that's what I hear from video presentations...

 

[Redbrangus]

So the signal from the instrument is routed to both input channels?

 

[Zbysek]

So the signal from the instrument is routed to both input channels?

No. My understanding is that when using the overdrive on Channel 2, one has two options: either to apply the overdrive to the full range signal or to apply it only to the higher frequencies (above 1.2 kHz). If one chooses the latter, the remaining lower frequencies are not affected by overdrive and remain clean...