Emerson Paper-In-Oil Caps

  • 22 Reviews
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Period-correct specs, warm tone. Genuine handmade tone caps, hand-picked by our friend Mitch Ingram at Emerson Custom Guitars and Electronics.

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Emerson Paper-In-Oil Caps .015uF (green)

.015uF (green)

Item # 1276
In stock, ready to ship!


Emerson Paper-In-Oil Caps .022uF (yellow)

.022uF (yellow)

Item # 1280
In stock, ready to ship!


Emerson Paper-In-Oil Caps .033uF (black)

.033uF (black)

Item # 1272
In stock, ready to ship!


Emerson Paper-In-Oil Caps .047uF (red)

.047uF (red)

Item # 1279
In stock, ready to ship!


Emerson Paper-In-Oil Caps .100uF (blue)

.100uF (blue)

Item # 1273
In stock, ready to ship!


Total: $0.00
Quantity: 20


Period-correct specs, warm tone. Genuine handmade tone caps, hand-picked by our friend Mitch Ingram at Emerson Custom Guitars and Electronics.

New old stock paper-in-oil caps from the former Soviet Union are prized by aficionados for their period-correct specs and subtle warm tone quality. Sold individually.

Capacitors are energy-storage devices that filter the high frequencies. A cap lets the tone control roll off the treble response, progressively warming the tone. The higher the value, the more bass output from the tone control at its "zero" setting.

A cap wired to a potentiometer creates a standard tone control, as explained in this article: How a tone control works

Value Common use
.015uF - 200V   With neck position humbucker for the Clapton "woman tone"
.022uF - 200V Humbucker tone
.033uF - 200V Versatile all-around cap, for single-coil or humbucker guitars
.047uF - 200V Single-coil guitars, many basses
.100uF - 200V Basses and certain eras of vintage Fender guitars

Trade Secrets! Newsletter

How to let your ears find the best tone cap for your guitar

Ever wonder whether a different capacitor would affect your tone? It's between you and your own ears, nobody else can tell you what you hear. Erick Coleman's got a simple way to prove to yourself which cap is the choice for you.

Product Instructions

How a tone control works

An overview of how a tone control works.

Ratings & Reviews

Emerson Paper-In-Oil Caps

  • Based on 22 Reviews
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Yes, capacitors make a difference!

By Mason Lamb from Fresno, CA
(Customer's Reviews) Wednesday, December 03, 2014

I put one of these in a terrific Fender Japan Telecaster and the tone comes through in spades. Telecasters are bright by nature, but that high end can quickly become an ice pick to the ear drums with cheap components. Dialing back the tone on a Tele often means sacrificing tone. Not with these Emerson caps. Even full out, the tone sparkles but never gets harsh. Rolling back the tone control only sweetens the tone; clarity is maintained through the whole sweep range, and even the "zero" setting has a lovely, wooly quality to it. Simply put, these are among the most musical capacitors you can use, and considering the outrageous prices fetched by some of the uber-boutique caps out there, these are a bargain. Buy them. Install them. Make the best music of your life.

I think I found my new standard!

By Derek from Sun Valley, CA 
(Customer's Reviews) Friday, October 03, 2014

I had picked up a .033uf for a telecaster project of mine, and I've gotta say that I was incredibly pleased with the tone. The ol' orange drop used to be my standard capacitor, but THIS is where it's at. If you have a guitar with a tone control that....well, just doesn't seem to ever want to give you any real tone, give one of these a shot before you decide you don't even need a tone control.

Hands Down The Best !

By Tracy G from Indianapolis,IN
(Customer's Reviews) Sunday, April 13, 2014

I have used every cap on the market in the last 30 years including true Bumblebees and these are by far the BEST!! Very rich warm tone I will be ordering more for each of my guitars.

My personal favorite

By Pacific North Coast Guitars from Washington USA
(Customer's Reviews) Tuesday, April 01, 2014

I love these caps. Tone, tone, tone, tone and did I mention tone? They work great with vintage output as well as modern high output pickups. With these caps your instrument tone control won't have a sweet "spot". It'll have about 20!


By Marc E.. from Boston
(Customer's Reviews) Monday, March 03, 2014

I'm sitting here practicing and I had to stop just to give my review of these caps. At first I didn't notice a big difference but as I'm breaking them in, I am blown away by the tones I am getting. I took a Chinese 335 knock off (with a great neck and body) and swapped all of the electronics out and put in these caps along with new pups, pots, switches, jack, wiring, bridge, tailpiece and nut. All parts from StewMac. What a difference. Best sounding electric I've owned by FAR. I got their less expensive version pups but they don't sound like it. With these caps my dog looks at me when he hears the freakin growl. Get these, break them in and see for yourself. Thanks StewMac.


By Joe304
(Customer's Reviews) Friday, January 03, 2014

Once you try them, I think I wouldn't use anything else, superb product.

Excellent Capacitor.

By Seref G+¦khan Pekkaya from Turkey
(Customer's Reviews) Thursday, January 02, 2014

I suggest it all kind of players which who uses single coil pickups.It eliminates harsh sound. But price a little high.


By Buddy from villa rica, georgia
(Customer's Reviews) Friday, December 13, 2013

In my LP custom shop R9 with the addition of Joe Bonamassa pickups these caps are the icing on the cake...way to go StewMac

That Elusive Sound

By Jim A. from Illinois
(Customer's Reviews) Friday, November 22, 2013

I have an Ibanez Artcore that just didn't sound right - harsh, no definition, slightly muddy tone, very little articulation. So, when I couldn't stand it anymore, I dropped a pair of TV Jones Classics into it, and finished the refit with a pair of these caps. I also shielded the pots with the copper tape, available here. Talk about a night and day difference! Astounding! Now, as you roll back the tone controls, the sound gets creamy and smooth, no harshness, no mud! Yes, the pickups made a big difference, but these caps match up exremely well. Expensive, but worth it. Throw away your modern disc caps, put these in, you won't regret it.


By Bruno Lobao from Brazil - Rio de Janeiro
(Customer's Reviews) Saturday, August 24, 2013

The mid frequencies really smooth up. Sounds sweet. But it's an expensive stuff just to get the sound right. What can we do rather than buy it nayway? =D Great stuff.

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