Gallien Krueger Club. GK Rules !

[Z-Bass]

Nothing to know about the Pre/Master ratio?

My understanding is that you crank the master to 3 o'clock and then adjust the boost to your liking. Then bring the volume up to gig level.

 

[Count Bassie]

My understanding is that you crank the master to 3 o'clock and then adjust the boost to your liking. Then bring the volume up to gig level.

Thanks @bassmike2010 and @Z-Bass !

 

[Its 1984 baby]

Hello,
Where's do I sign up for Gailien Kruger? I have a MB800 amp. I m just waiting for Christmas wish list on a Gailien Kruger 4x10 cabinets.

Peace,
Me

 

[mustbampeg]

I traded for this bad boy today… 1001rb ii and a neo 412. Woot!

 

[DavyR]

I traded for this bad boy today… 1001rb ii and a neo 412. Woot!

I played thru this rig setup a few years ago and it was unreal! Congrats!

 

[Marko 1]

I traded for this bad boy today… 1001rb ii and a neo 412. Woot!

I let one of those cabs slip by me on GC Used site, 94lbs...

dammit.

 

[groovaholic]

Has anyone compared the 800 and 1200 watt amps (i.e. the Legacy 800 vs the Legacy 1200)?

Power ratings into a single 4 or 8 ohm cabinet are the same, but the two-channel output of the 1200 models suggest a different power module - so I was curious if they sound any different.

 

[rag]

Has anyone compared the 800 and 1200 watt amps (i.e. the Legacy 800 vs the Legacy 1200)?

Power ratings into a single 4 or 8 ohm cabinet are the same, but the two-channel output of the 1200 models suggest a different power module - so I was curious if they sound any different.

They will sound the same with only one channel loaded on the 1200. When you load both channels on the 1200 with 4 Ohms there will be some supply sag which will add punch to the sound, similar to an analog amplifier. The 1200 will not punch like a GK analog amplifier but loaded this way it will exhibit some of that attitude.
RAG

 

[groovaholic]

They will sound the same with only one channel loaded on the 1200. When you load both channels on the 1200 with 4 Ohms there will be some supply sag which will add punch to the sound, similar to an analog amplifier. The 1200 will not punch like a GK analog amplifier but loaded this way it will exhibit some of that attitude.
RAG

Great info - thank you!

Most of the time, I’d be using the amp with a single cabinet - my large cabinet is a 4 ohm 2x12 and my small cabinet is an 8 ohm 1x12. Rehearsals are in a small room, so I generally use the 1x12. Gigs get the 2x12. Outdoor gigs might get both cabinets - so 2.67 ohms is the minimum load I’d be driving.

Trying to figure out if the Legacy 800 or 1200 would be the best fit for my usage…

 

[TonyP-]

Great info - thank you!

Most of the time, I’d be using the amp with a single cabinet - my large cabinet is a 4 ohm 2x12 and my small cabinet is an 8 ohm 1x12. Rehearsals are in a small room, so I generally use the 1x12. Gigs get the 2x12. Outdoor gigs might get both cabinets - so 2.67 ohms is the minimum load I’d be driving.

Trying to figure out if the Legacy 800 or 1200 would be the best fit for my usage…

I use a 4 ohm cabinet all the time the 800 and one of the first players to get one and it’s still going strong.

I’m playing some solid size rooms and theaters with that rig.

 

[groovaholic]

I use a 4 ohm cabinet all the time [with] the 800

I have no doubt that the Legacy 800 is more than enough - but I wasn't having any luck finding a good deal on a Legacy 800.

I did find a good deal on a Legacy 1200, and jumped on it.

After I ordered, I commented about the lack of used Legacy 800 on the market to @shoot-r (the guy who ended up with my Legacy 800 in last spring's round-robin trade) and he said "Well, I've been using my MB Fusion more lately..."

So I might have the opportunity to directly compare the Legacy 800 and Legacy 1200 very soon.

Aside from the fact that I've already owned the exact amp I'd be receiving, one feature of the Legacy 800 that appeals to me is the ohm switch.
I'm wondering if putting the impedance switch at 2.67 or 2 ohms would reduce the available power at 8 ohms?
I know the Mesa Subway amps work like that...

If I'm using the Legacy 800 with just my Neo 112, the amp can put out more into 8 ohms than the cab is rated for.
Granted, the rehearsals where I use the Neo 112 by itself are not especially loud.

Also since it sits in the corner of a small basement room, boundary reinforcement means that I have to cut lows to keep it from getting boomy - which further reduces the power that I'd need to send to the cab.

 

[TomB]

I have no doubt that the Legacy 800 is more than enough - but I wasn't having any luck finding a good deal on a Legacy 800.

I did find a good deal on a Legacy 1200, and jumped on it.

After I ordered, I commented about the lack of used Legacy 800 on the market to @shoot-r (the guy who ended up with my Legacy 800 in last spring's round-robin trade) and he said "Well, I've been using my MB Fusion more lately..."

So I might have the opportunity to directly compare the Legacy 800 and Legacy 1200 very soon.

Aside from the fact that I've already owned the exact amp I'd be receiving, one feature of the Legacy 800 that appeals to me is the ohm switch.
I'm wondering if putting the impedance switch at 2.67 or 2 ohms would reduce the available power at 8 ohms?
I know the Mesa Subway amps work like that...

If I'm using the Legacy 800 with just my Neo 112, the amp can put out more into 8 ohms than the cab is rated for.

Granted, the rehearsals where I use the Neo 112 by itself are not especially loud, and it sits in the corner of a small basement room.
Also, boundary reinforcement means that I have to cut lows to keep it from getting boomy - which further reduces the power that I'd need to send to the cab.

Good question. Could you try it out at low volumes? Could @rag comment?

 

[metron]

Quick question for people with an older 80s 800rb. I just picked one up for pretty cheap but the case is in rough condition. It seems to function fine except Im getting hum from the transformer. Its not audible through the speaker. Its a physical and audible hum coming from inside the amp. The amp vibrates a bit from it. Its not real loud though. Whisper level.

Is this transformer hum normal with older 800rbs? It looks like the amp was dropped a few times so my fear is the transformer suffered physical damage that might turn into something more serious in the future.

Beyond that, the amp sounds great. Not sure if I should keep it or return.

 

[Count Bassie]

Quick question for people with an older 80s 800rb. I just picked one up for pretty cheap but the case is in rough condition. It seems to function fine except Im getting hum from the transformer. Its not audible through the speaker. Its a physical and audible hum coming from inside the amp. The amp vibrates a bit from it. Its not real loud though. Whisper level.

Is this transformer hum normal with older 800rbs? It looks like the amp was dropped a few times so my fear is the transformer suffered physical damage that might turn into something more serious in the future.

Beyond that, the amp sounds great. Not sure if I should keep it or return.

It might be cool to have it looked at by a competent tech- it might be from taking a bump, but it might be a simple fix nontheless.

 

[bassmike2010]

Quick question for people with an older 80s 800rb. I just picked one up for pretty cheap but the case is in rough condition. It seems to function fine except Im getting hum from the transformer. Its not audible through the speaker. Its a physical and audible hum coming from inside the amp. The amp vibrates a bit from it. Its not real loud though. Whisper level.

Is this transformer hum normal with older 800rbs? It looks like the amp was dropped a few times so my fear is the transformer suffered physical damage that might turn into something more serious in the future.

Beyond that, the amp sounds great. Not sure if I should keep it or return.

Not trying to be Captain Obvious here but just having a hard time imagining an audible hum coming from a transformer. Just not within my not so limited experience owning amps. Are we sure that's not anything to do with a cooling fan?

 

[metron]

Not trying to be Captain Obvious here but just having a hard time imagining an audible hum coming from a transformer. Just not within my not so limited experience owning amps. Are we sure that's not anything to do with a cooling fan?

Its an 800rb so no fan or other moving parts inside. Its definitely physical transformer hum coming from inside the case. Specifically at a frequency close to B so probably 60 or 120 Hz.

 

[stockplus]

Yep, mine hums in the way you are describing - a physical vibration emanating from the case, not through the speaker. I have had two 800RBs and both did this to varying degrees. They also have some background noise and hiss at idle. Both of these amps were gone over by an extremely competent local tech and they were deemed "OK".

In a live context you'd really never notice the physical or electrical noise. Compared with today's ultra-low noise amps (of which I have a few) in the bedroom though...the 800RB makes a bit of a background racket.

Much love to the 800RB and especially the 400RB which is my favorite GK amp.

Its an 800rb so no fan or other moving parts inside. Its definitely physical transformer hum coming from inside the case. Specifically at a frequency close to B so probably 60 or 120 Hz.

 

[groovaholic]

having a hard time imagining an audible hum coming from a transformer.

Back when I played into tube amps, I forgot to connect a speaker once.
When I tested the amp, I could hear my bass through the transformer, sounding like I was hearing a kazoo over the phone.
Thankfully I realized my error before I damaged the output transformer - but transformers can definitely make a sound.

 

[metron]

Yep, mine hums in the way you are describing - a physical vibration emanating from the case, not through the speaker. I have had two 800RBs and both did this to varying degrees. They also have some background noise and hiss at idle. Both of these amps were gone over by an extremely competent local tech and they were deemed "OK".

In a live context you'd really never notice the physical or electrical noise. Compared with today's ultra-low noise amps (of which I have a few) in the bedroom though...the 800RB makes a bit of a background racket.

Much love to the 800RB and especially the 400RB which is my favorite GK amp.

Thanks thats helpful!

 

[definenredefine]

Quick question for people with an older 80s 800rb. I just picked one up for pretty cheap but the case is in rough condition. It seems to function fine except Im getting hum from the transformer. Its not audible through the speaker. Its a physical and audible hum coming from inside the amp. The amp vibrates a bit from it. Its not real loud though. Whisper level.

Is this transformer hum normal with older 800rbs? It looks like the amp was dropped a few times so my fear is the transformer suffered physical damage that might turn into something more serious in the future.

Beyond that, the amp sounds great. Not sure if I should keep it or return.

I've not noticed such a hum with the 800RB, but could be I don't hear it since mine is a wood rack case. Maybe something that should be addressed by a reputable tech?