Why would the person need a multi meter when the amp comes with one built into the chassis and has markings for optimal bias?
For his future amp purchase? Everybody needs a multimeter, unless you think a light bulb change needs a service call 😁.
can you please help me around how to use my first tube amp?
Hi, I picked up on a whim an older tube amp, first I have ever had that is non automatic biasing and outside of that really no nothing about tube amps
Its a used 10 year old or so Rogue Audio Atlas Magnum power amp with KT 120 power tubes
the pre amp/dac will be RME adi-2 and speakers are Sonus Faber Lumina V's (4ohm)
I was thinking I would also also try it without preamp from a bluesound node
I believe the stock setting is 8ohm on the amp and you need to crack the lid to adjust down to 4
nervous about installing and biasing the tubes
can anybody advise what happens if I run the amp without the tubes being biased correctly?
also, can I run this from the 8ohm default so I dont have to open it up?
finally, how do I know when i need new power tubes and pre tubes?
any other advice will be appreciated
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- 18 posts total
I have had 3 (Tempest, Perseus, ST-100) Rogue products, all excellent, so you should be happy. With these products, they are simple and cleanly laid out, I think you need to get comfortable with the insides. You will need to check the bias every 6 months, if you are going to change the output impedance, it is a simple wire change (if it is like what I've had), then there is any tube rolling which is on top with yours but requires general comfort with the product. Good luck with it, I have nothing but positive stuff to say about Rogue and the people at Rogue are some of the best I have ever worked with. |
@russ69 Quite frankly if and when he upgrades from the already excellent Atlas Magnum, it should be a tube amp with auto-bias or at least similar built-in biasing tools (all Rogue amps have the same scheme). VAC even had a cool color LED-based biasing scheme before they went to full auto-bias. How many tube amps these days actually require a multimeter? It’s completely unnecessary and borderline sadistic. Weren’t you the "time marches on" guy in the coaxial thread? (lol - just ribbin' ya) Yes, I have a multimeter. As far as my audio gear goes it’s only been needed for extremely dangerous and finicky electrostatic headphone amps. And once or twice to measure a speaker coil I thought was busted (it wasn’t, thankfully). |
- 18 posts total