Mesa TT800 question

[lay a groove]

My new Mesa TT 800’s limiter light will not go on no matter how hard I drive the input. Could it be the tubes were damaged in transit?

multiple settings were tried in both channels.

@agedhorse

 

[agedhorse]

How loud are you playing it?

 

[two fingers]

Read the manual and call me in the morning.



I'm only half kidding. Have you read the manual? It's actually very concise and ridiculously informative. It's almost an entertaining read!

You may find something in there that helps.

 

[Doufuss]

My new Mesa TT 800’s limiter light will not go on no matter how hard I drive the input. Could it be the tubes were damaged in transit?

multiple settings were tried in both channels.

@agedhorse

What kind of bass are you using? Is it active or passive? Where do you have the Active/Passive switch set?

 

[agedhorse]

Just to be clear, the limit LED is on the output stage, not on the input stage.

There is no input O/L LED on the TT.

 

[Redbrangus]

 

[lay a groove]

thank you agedhorse. I’ll keep messing with settings and review the manual again

How loud are you playing g it?

 

[ShadowGroover]

Read the manual and call me in the morning. I'm only half kidding. Have you read the manual? It's actually very concise and ridiculously informative. It's almost an entertaining read! You may find something in there that helps.

"Read the manual" answers use more words than helpful answers, once again.

There is no input O/L LED on the TT.

 

[lay a groove]

Appreciate the responses!

 

[Doufuss]

Just to be clear, the limit LED is on the output stage, not on the input stage.

There is no input O/L LED on the TT.

No matter. If he's not driving the front end he won't be able to hit the limiter. I find this amp to be kind of quiet with passive basses, and I always have a little boost in front. Opens it up.

 

[agedhorse]

No matter. If he's not driving the front end he won't be able to hit the limiter. I find this amp to be kind of quiet with passive basses, and I always have a little boost in front. Opens it up.

If he’s looking for the limit LED to flash while driving the input, but with the master turned down than it does matter.

In the high gain position, there’s plenty of gain for a passive P bass to drive the amp into limiting with the gain and master at ~12:00-1:00.

 

[two fingers]

No matter. If he's not driving the front end he won't be able to hit the limiter. I find this amp to be kind of quiet with passive basses, and I always have a little boost in front. Opens it up.

I haven't had that experience at all. All of my basses (except one) are passive. No boost needed.

 

[two fingers]

"Read the manual" answers use more words than helpful answers, once again.

In many cases you would be correct.

In THIS case, you are not.

1) The manual for the TT800 is short and concise. Reading the manual for a modern TV would likely take hours. And it would describe features many of us would never use.

2) There are a ZILLION features on the amp. A quick read through to explain each one would be helpful. They are well-thought-out features. And there are literally a few sentences about each (in many cases).

3) Clearly, OP thinks the LED is some sort of INPUT indicator. It's an OUTPUT indicator. Had he read the manual, he would know that (and probably would have picked up a few dozen other helpful tips along the way).

That wasn't a blanket statement from me. I actually own a TT800 and have read the manual cover to cover. So I have experience with THAT manual.

 

[Plain Old Barry]

That wasn't a blanket statement from me. I actually own a TT800 and have read the manual cover to cover. So I have experience with THAT manual.

Same here, and that awesome manual even includes sample setups to get started. It's probably the first amp I ever hit the ground running with in 40 years, as I was able to download and read that manual while I waited for delivery.

For those who don't own the amp and might want to check it out, it's here:
Mesa/Boogie - User Manuals

 

[Doufuss]

If he’s looking for the limit LED to flash while driving the input, but with the master turned down than it does matter.

In the high gain position, there’s plenty of gain for a passive P bass to drive the amp into limiting with the gain and master at ~12:00-1:00.

That's been my experience with my P bass. My jazz, on the other hand, is pretty low output.

 

[Doufuss]

I haven't had that experience at all. All of my basses (except one) are passive. No boost needed.

Nice.

 

[agedhorse]

Same here, and that awesome manual even includes sample setups to get started. It's probably the first amp I ever hit the ground running with in 40 years, as I was able to download and read that manual while I waited for delivery.

For those who don't own the amp and might want to check it out, it's here:
Mesa/Boogie - User Manuals

The manual was written by myself, with heavy input and editing by TB members Al Kraft and our late Chef. We took a lot of initiative from discussions and suggestions that many TB members provided.

 

[logdrum]

There is actually a quiz. Be happy it's not one of the tube amps where there is a 10 page Randy Smith white paper on biasing and proper class A operation, dyna-watt concepts

 

[Sands]

The manual was written by myself, with heavy input and editing by TB members Al Kraft and our late Chef. We took a lot of initiative from discussions and suggestions that many TB members provided.

I keep a copy of all useful manuals on the iCloud. Lawn mower manual gets used routinely (annually mostly) for maintenance. So it is nice to have it (on the phone, iPad,
Mac). The iCloud is also where I keep Mesa manual, but only because I didn’t get a hard copy! If I had a hard copy, it would definitely be in an ergonomic location for easy reaching in my office (studio).

Other than the Mesa, considering the many shapes and sizes of manuals, it is generally so much easier to use the cloud than storing in the file cabinet or any other hard copy solution.

I assume the seller will make $100 in a few years by selling it on eBay after it turns up.

Maybe Kinkos will print up a copy into a handy spiral binding for me. Hmm

 

[Plain Old Barry]

I keep a copy of all useful manuals on the iCloud.

I do the same in Dropbox. Very helpful, and PDF's are searchable.