Building a passive attenuator

I purchased that quite large 150 Watt point to point hand wired Bugera 1960 guitar amplifier. I’ve posted a few short blogs about the amp. I certainly had to wait long enough to get it from Musicians Friend but that’s another story. After seeing (or should I say hearing) Matt Pike play a vintage single channel Marshall at the Sleep show on 4/20/2015 at the Ogden Theatre in Denver, I was hooked on that single channel Marshall tone. It was a sight to behold and witness!

You can still purchase the Marshal 100 Watt super lead reissue but they are $3500-ish. That’s rockstar money. I had looked for an alternative since that show, I found it about a year ago when a friend told me about the Bugera 1960 infinium. I’m not a stranger to the brand, I have a vintage 22 that’s my go to gig and jam amp. It’s loud all hell, a little too loud and it’s really good at taking pedals on the front end. I paid $250 out the door at GC years ago for this little amp and have hauled it all over in 2 different states. My buddy Chris nicknamed that amp “Mo money Mo problems.”

When I started looking at specs for the 1960 I was blown away. It is truly point to point wired, this is the inside of the chassis:

I’ve had my shiny new amp in a friends commercial studios live room and a large rehearsal space in the last 2 weeks, it’s loud! I’ve owned both Marshall and Carvin heads before, none were as loud as this amp. Unfortunately it’s far too loud for my house, but I would love to play the amp at home and do some recording with it. I need an attenuator, DI box and / or speaker emulator of some kind.

My Goals are as follows in order of importance:
• Bring the amps high volume sizzle to a reasonable live speaker volume.
• Create a DI environment so I can record the amp direct.
• Speaker emulation and sound manipulation.

Another blogger I follow named Chuck (who I don’t know but writes great articles for musicians) is looking into the bipolar other aspect of this. He’s looking at using amplifiers to record direct. That is not my main goal but a secondary goal that’s a priority. You can read his article on DI and impulsive amplification here at Chucks Guitar Geekery!

The products I’m searching for are not very abundant. Many attenuators I’ve looked out simply pull -20 DB with a switch. -20 DB will not be nearly enough for this head, not even close. The other issue I am seeing is a decent reactive attenuator is pricey. They range from the $250-ish to $1295 price point. Most I’ve seen online are not attenuators first but DI and speaker emulation. That’s making this project even more elusive.

What’s available:

Universal Audio Ox Amp Top Box street price is $1295 as is the new Boss WAZA . The last time I saw Nuno he was using a UA Ox amp, his tone was spot on. Once again $1200 is rockstar money far out of what I am willing to budget. Rivera, Two Notes and Radial make models in the $400 to $600 price range. That’s still really pricy without being able to test drive one but I do like the UA Ox amp, a lot!

Bugera actually makes a passive unit for $99 but passive is not what I’m really interested in, or is it? When I did some research into passive attenuators I found there wasn’t much to them. Most are just two 1/4” input jacks and a 100k pot.

I have all of those parts in the man cave with the exception of an enclosure. I ordered an enclosure from Parts Express that was supposed to be here yesterday. With the snow storms blowing through my state have been I doubt it will arrive anytime before Saturday.

The two things that I feel like I am accomplishing with this project are: One, not spending a ton of money on something I have zero experience with. Any musician can tell their G.A.S. (Gear Acquisition Syndrome) stories, some worse than others. Two, keeping it D.I.Y. is always fun, challenging and cost effective. I will share here when I’m done putting it together.

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Jim Dunlop I am Disappoint

Dear Mr. Jim Dunlop, I am Disappoint…..

I buy Strap Locks for Hey G.I. Joe All American Les Paul guitar Made in Korea and pay extra premium for fancy gold electroplated hardware to match already equipped gold twinkling bling. When I do dis little screws strip like hungry snow plow operator in Bolshevik Revolution! Why you make screw so cheap? Craftsman okie dokie Screw driver split screw like prison guard in Gulag enforcing order huh? So Cheapie Cheapie Mr. Jim Dunlop, I am Disappoint!

Sincerely Yours,

Vladimir Shcmittendorf

Gibson Left – Dunlop Right