Ferrofluid Repair Kit

Ferrofluid 100uL General Purpose for 1" Diameter Coil

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Part Number: MI-FF100

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Ferrofluid Repair Kit, 100uL for 1" Diameter Voice Coil Part # MI-FF100

Ferrofluid Repair Kit
100uL for 1" voice coil
Reduces distortion
Increases power handling
Comes complete with cleaning strips and instructions
For most compression drivers, repairs, and diaphragm assemblies
SDS

Our ferrofluid kits come with pre-measured packets of ferrofluid which are used to replace the old fluid in speaker air gaps when replacing diaphragm and coil assemblies.

Ferrofluid improves the performance of high frequency and midrange drivers. It works by damping the impedance at resonance to effectively lower distortion, smooth frequency response, and increase thermal power handling. It should be used to replenish drivers treated previously with ferrofluid. With care, it can also upgrade most drivers that have never contained ferrofluid. The kits listed are approximate fill quantities relative to approximate voice coil diameters. In general, the air gap should be 75% filled prior to inserting a voice coil diaphragm assembly. The kit contains synthetic ester-based ferrofluids and in most cases should not pose any adhesive incompatibility. It is recommended that this is confirmed by contacting the driver manufacturer prior to usage. Adding ferrofluid to a driver not intended for it will, in most cases, void the original manufacturer's warranty. Included in kit: A ferrofluid packet, absorbent paper strips for removing old ferrofluid, detailed instructions, and material safety data sheet.

Specifications and Physical Properties

Appearance	black-brown or red-brown viscous fluid
Carrier Liquid	synthetic ester oil

	CGS Units	SI Units
Saturation Magnetization (Ms)	220 Gauss	22 mT
Viscosity @27°C	200 cP	200 mPa·s
Density @25°C	1.16 g/cc	1.16 10³ kg/m³
Pour Point	-35 °C	-35 °C
Flash Point	>200 °C	>200 °C
Thermal Conductivity @38°C	150 mW/(m·K)	150 mW/(m·K)
Surface Tension @25°C	32 dynes/cm	32 mN/m
Coefficient of Thermal Expansion	7.5 x 10^-4 ml/ml°C	7.5 x 10^-4 /K

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Tech

I had a speaker with low output from the tweeter and replacing the ferrofluid fixed the problem!

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Reviewed by: Rick Denny from Amarillo, Tx on 1/21/2016

A+!!!

I have a vintage pair of BA A100's.... all original. I was skeptical about doing the fluid change, but followed the instructions, the old fluid absorbed right up, nothing gummed up in my case. Applied new fluid re-assembled and was amazed at the difference in clarity!! Glad I took the time to do it. First for me. Thanks Simply Speakers!!

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Reviewed by: Greg D from Ontario, Canada on 7/1/2019

Boston A400 Tweeters

While doing the new foam surrounds on my Boston Acoustics A400's I decided to replace the ferrofluid in the tweeters as well. Process was straightforward. Results were spectacular. I had forgotten how great the A400's coupled to my 80's Yamaha M65 amp and AVX preamp sounded. Very pleased with the results and my thanks to Simply Speakers for making these parts and the instruction on repair available to us old audiophiles with vintage stuff.

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Reviewed by: Rob from Missouri on 4/15/2020

Perfect For Tweeter Refresh

I purchased two of these ferrofluid refresh kits to restore the SEAS H211 tweeters in my PSB Project B2 speakers. The kit was easy to use, instructions were clear and easy to follow, and I'm very happy with the results.

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Reviewed by: Richard from Kitchener on 4/24/2020

Not received yet

Mail very slow at this time and haven't got it yet due to covid slowdown. But this is my second order and the last one worked out great so expect this one to be just as good..

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Reviewed by: Robert Allain from London Ontario on 1/12/2021

Super Easy

I had bought a replacement tweeter for my Klipsch RF-3. When I took it apart, I realized that I should probably replace the ferro fluid on this 21 year old speaker. I bought a replacement tweeter for the other speaker and ordered the ferro fluid. The replacement of the fluid was easily done using the instructions provided. Everything went perfectly and now my speakers are working like new! I highly recommend Simply Speakers. The replacement tweeters also came from Simply Speakers via Amazon and work like new.

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Reviewed by: Frederick Prahl from Frisco on 1/30/2021

Speakers need more work

Great service from Simply speakers! I followed the instructions that were really simple and my speakers did not sound any better. My speakers are 30 years old and I believe they need more work perhaps some work on the crossovers or new caps. I didn't really play these speakers hard over the years but I definitely played them a lot and I think it's time just buy a new pair of speakers. I was fortunate enough to buy a pre-owned pair of BW 804 Matrix in excellent shape. I bought them from a friend I've known for over 40 years. He stepped up to the 802 Matrix and sold me the 804 Matrix. Before I bought them from my friend he replaced the drivers in both speakers. The 804 Matrix really shine! Once again, I had an overall nice experience with Smply s Speakers.

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Reviewed by: Tobin Mummert from York on 3/12/2022

Excellent

Reasonable price, good product and fun to watch as the magnet pulls it in.

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Reviewed by: Toastie from Saskatoon on 4/5/2022

Tweeter Overhaul Must

After purchasing a diaphragm replacement I realized the 39 year old ferrofluid had the consistency of molasses. I ordered a new diaphragm and the need new fluid. Carefully cleaned out gap, alcohol seemed to work well to dissolve the deposits on the inner and outer walls of the mag gap. Once cleaned and rinsed out and dried, I added the new fluid, installed a new element and the tweeters work and sound like new ! Perfect fit.

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Reviewed by: Doug Davis from South Carolina on 7/8/2022

Easy Install

Had a speaker literally ran into and knocked over and hit so hard on floor mid-range magnet separated. Ordered a used horn and lasted 1 gig. I opened up and no ferro fluid in gap. So I came to simply speaker and replaced both fluid and diaphragm. Working Great and fast delivery.

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Reviewed by: Jim Gillen from Rochester, NY on 10/27/2022