Audio Research Reference 150 severe distortion


My Reference 150 is emitting severe distortion in both channels. I checked the bias of the K120 tubes and one tube in both channels is reading as low as 20, rather the the standard 65 range.

Does anyone know of a possible fix that will not involve me shipping the amp back to Audio Research?

Both bad tubes are less than 3 months old.

I gotta play my Liberace Christmas music!
128x128shaq

Showing 8 responses by czarivey

It looks like AudioReseach Ref series are similar to Ferrari that have great performance but for the price of poor reliability.

Cleeds, I just follow frequent facts about Ref series.
It doesn't look like tube(s) problem. It looks like functionality problem.
bifwynne, you've mentioned bad bias resistor which may go with bad tube didn't you?
OP mentioned that tubes are less than three months old... What does it tell?
Just count facts and science becomes simple math.
Go with more facts throughout Audiogon posts about Ref series reliability: frequent premature tube blowing, bias resistor, bias DC cap etc... All these combined dictate sending unit to repair facility and back to get ripped off just like Ferrari owners do.

Your personal ownership is probably from at least 7...8 years ago. Now I feel that it's different. I haven't seen word dropped about Ref series reliability till recent and mostly on current models not ones built back than.
Tube amp designs have lots in common between each other and frequent blowing tube is functional or design problem. 
is VT100 recent ref series?
My imagination about Ferrari service compares to shipping 100lb or heavier unit back-fourth. Recent posts about problems shouldn't even be on the first place on $10k+ equipment makes me believe so. I believe that for the money spent on Ferrari all future services and repairs should be FREE for lifetime. Same with AudioResearch ref series.

Taters,
My Subaru XV has lifetime warranty on drive train. Subaru isn't out of business.

Wow I wish I can build some stuff that will require constant and future service for life! Nice business strategy indeed, but would still prefer to purchase products with no need of service or shipping 100lb components back-fourth. Even doing it locally within the state is burden. Driving to service location also requires time. To my personal happiness, I've never shipped any component to repair and never used any dealer to repair or service my automobiles. Pure DIYer on most of repairs and services if not all.

Free drive train service... why not. Bryston has 20 years of warranty to begin with.


dchang198118 posts12-03-2015 4:44pmI wish audiogon  had a block user function.

There are Report-it flags should be next to each answer or discussion but found only on few out of many for some reason.
The development crew of Audiogon is not savvy enough to properly test and develop applications. If you ask Justin(the developer manager) for this function, his crew may screw up whole site.
All you can do is ask admin to block and maybe perhaps probably possibly your dream will come true.