Search  for anything...

Rotosound FM66 Swing Bass 66 Stainless Steel Funkmaster Bass Guitar Strings (30 50 70 90)

  • Based on 386 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $5 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, May 31
Order within 23 hours and 48 minutes
Available payment plans shown during checkout

Features

  • STAINLESS STEEL FUNKMASTER 30 50 70 90

Description

The most popular Roundwound bass string ever. Rotosound was the first string company to produce this kind of string. Introduced in 1962 it changed the sound of the instrument instantly. The favourite string of many players including Billy Sheehan, John Paul Jones and Geddy Lee. Available in all popular gauges and scale lengths. The steel used to produce these strings is unique, combined with a highly secretive manufacturing process.


Item Weight: 1.6 ounces


Product Dimensions: 6.3 x 6.3 x 0.79 inches


Domestic Shipping: Item can be shipped within U.S.


Country of Origin: United Kingdom


Item model number: FM66


Is Discontinued By Manufacturer: No


Date First Available: July 16, 2004


String Gauge: Extra Light


String Material: Stainless Steel


Number of Strings: 4


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, May 31

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Apple Pay Later
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • These strings are the prescription for what ails the ancient bassist!
Yeah, these strings are light and bright. I have been a devoted Rotosound customer for three-and-a-half decades. I put the basses up for a while, and, when I returned to them devotedly in the last two years, I discovered that I had a number of repetitive motion injuries which tempered my pleasure with pain. The first thing I did to address the problem was look around for a lighter gauge set: Rotosound had a solution to the problem. The FunkMaster balanced set (30, 50, 70, 90) is a joy to play for my aching hands. They have a nice, elastic feel, though not overly so. It does facilitate bends, though I don’t really need to bend strings very often. The elasticity of these strings allows me to do more with less fatigue. The tone is quite good, perhaps not exactly that of the legendary 66 sets, but good nonetheless. These went on my four-string, which is loaded with pre-Fender Bartolinis and matching pre-amp, and which runs through an older SVTIII and Hartke 4200. The tone is excellent. While there is a little bit of sacrifice to be had by going to the lighter strings, in truth, these are very similar to the bottom four strings on any six-string bass. Honestly, there is very little noticeable drop off in tone compared to the 66 sets, despite the lighter gauge. On the plus-side, you will notice less fatigue, a possible increase in dexterity, and hear that typically fat and bright Rotosound tone. So far, I’ve put sixty or seventy hours into this set with really no appreciable dropoff in brightness or elasticity. It appears that these strings will also possess the longevity of the chubbier Rotosound sets. I am so very pleased with this set that I likely will stay with them for as long as Rotosound will make them. Addendum after 11 months of playing these: I have put many, many hours on this same set since the review above, playing nearly every day for an hour or so up to a few hours...I have been trying to recover dexterity that I once had twenty years ago. These strings maintained their elasticity for about seven or eight months, and the tone remained the same (minus the bright that naturally rolls off a new set of strings) after about a month or so. Any fall-off in brightness was easily offset by a little touch of the tone pot. They do, however, experience a point at which they become a little dead, and that came after about ten months on this bass. It is definitely time to swap them out, but I put a lot of hours into these, maybe twice or three times the hours of a casual player. They are long-lasting and hold on to their bright and powerful tone, but they do grow a little dead at the end of much vigorous use. Still very, very happy with this set. You will be too. ... show more
Reviewed in the United States on September 9, 2019 by Hiram Wylie Justus

  • Give up the Funk!
I have these on ALL 7 of my basses since I found them on Amazon. Usually I’d have to special order these form a local music retailer and hope they didn’t charge me an arm and a leg for the service. Out of the pouch they have great brightness. They are the thinnest strings out there so I would say their “thickness” is minimal, They have great sound and hold their tune well after a normal break in period. They won’t have the same kind of harmonic overtones or boominess that thicker strings tend to have, but almost all of my instruments are active, so I can add low end as needed to compensate. Haven’t broken any yet and tend to swap them out when the highs start noticeably start to fade, or they start to loose their springiness. The amount of time, fuel and hassle I save by the ability to have them delivered directly to me at a great price is almost worth the yearly cost of a Prime Membership alone!! ... show more
Reviewed in the United States on November 6, 2020 by Christopher L Wilson

  • OH YEAH!!!
Didn’t know what I was missing. Normally I’m a heavier gauge guy on all string instruments, so I wasn’t sure what to expect. 1st- the stainless steel strings offer a better grip because they are a bit rougher to the touch, but not uncomfortable . 2nd- they’re bright when you want them to be and mellow when you turn down the tone control on your bass. 3rd- they are heavy enough to sound like a heavier bass strings, but light enough to bend, chime and vibrato. Not sure if they will tear up my frets though I don’t play professionally I’m not real worried. Overall I’m really excited to have these strings on my Ibanez. They offer so much more versatility and tone. I’m ordering another back up set soon. ... show more
Reviewed in the United States on April 2, 2020 by Alienjanitor

  • Gnarly and slinky, great slapping and chording strings.
I have these on my '93 Ernie Ball Music Man Stingray and they are fantastic. Really bright and responsive. Palm mutes lovely and clear. Slaps a little zingy but not horrible and also brand new. Super low tension and hold tune well, even on frequent up and down tuning with a hipshot d-tuner. I love Rotosounds. They sound like a pickup on a grand piano. ... show more
Reviewed in the United States on January 21, 2022 by Univoxnut

  • Almost Impossible to tune.
I usually purchase the Rotosound RS66LD Long Scale Swing 66 Bass Strings. But I thought I would try to go for a new sound. These strings were almost impossible to tune. After 15 minutes I finally got them close. But they went out after a few. Not sure why this happened.
Reviewed in the United States on November 9, 2021 by Rob

  • Most fun set of strings I have used - great for slapping and tapping
I have these strings on my Musicman Stingray, and they are great! I mostly play jazz - participating in a non-music-major Jazz Combo class at the University of Southern California. These strings are by far the most fun set of strings I have ever used. While not for everyone, if you are looking for a set of strings for slap-style bass or tapping, you will have a lot of fun with these. Of course, these are light gauge strings - and will not produce the deep sound or have the same bass-presence as heavier gauge strings. Since these strings are so light-gauge, you WILL have to adjust your truss rod and play with your bridge saddles. Once you get these on and your bass adjusted for them, you will definitely be able to get ridiculously low action with these strings. This, combined with the low tension, makes tapping extremely easy - playing the Overjoyed cover by Victor Wooten was made so much easier when I tried these out. The low tension also makes these great for slap bass - it is very easy to slap and pop these - and more importantly it just FEELS much better and more fun. As far as sound goes, I will first say that of course, these strings will not produce the same sound as a heavier gauge set of strings. The presence of the notes will not come out as much. HOWEVER, these have a nice sound to them that sounds great with funk-slap. The sound these strings produce is definitely much bigger than I expected though - with surprisingly more fundamental frequencies than you would think. These strings have a VERY bright sound - plenty of high overtones, as they are made of stainless steel. Mark King uses these strings - and listening to his recordings will give you a good idea of what these sound like. ... show more
Reviewed in the United States on March 17, 2015 by Aaron Hong

Can't find a product?

Find it on Amazon first, then paste the link below.