A range of loudspeaker adhesives are available from CTA Industrial Ltd. Go from parts and pieces to power test in 10 minutes! As Hernon’s UK & European technical specialists we can advise on a complete range of adhesives for speaker assembly.
Our adhesives are available in a range of formulations that are designed to bond different types of materials, including metals, plastics, and composites. The adhesive is applied to the mating surfaces of the speaker components and then allowed to cure, forming a strong and durable bond.
The process of building a speaker using loudspeaker adhesives typically involves assembling several components, including the pole piece, magnet, top plate, basket, voice coil, spider, cone, surround, and dust cap. The adhesive is used to bond these components together in a precise manner to ensure that the speaker functions correctly.
To use loudspeaker adhesives to build a speaker quickly, it is important to choose an adhesive that cures quickly but still provides a strong bond. A good example is Hernon’s Quantum 134 adhesive which is designed for use with loose-fitting parts such as cones and dust caps. Another example is Hernon’s Quantum 135 adhesive which is designed for use with tight-fitting parts such as voice coils and spiders.
When using loudspeaker adhesives to build a speaker quickly, it is important to follow the manufacturer’s instructions carefully. This typically involves applying a thin film of primer to the mating surfaces of the components before applying the adhesive. The components are then mated together with a twisting motion to ensure that the adhesive is spread evenly across the mating surfaces.
Our range of speaker adhesives are essential in the speaker assembly or repair process, providing a strong and durable bond between the various components and providing quick assembly times. Here is some guidance for product usage.
Pole piece to magnet – Magnet to top plate – Top plate to basket
1. For gaps less than .005″ use HASA 716 and EF Primer 50. For gaps greater than .005″ use ReAct 727 and EF Primer 56.
2. Apply Primer to one or both mating surface(s). Allow 60 seconds for evaporation.
3. Apply 360° bead of adhesive. Mate parts with a twisting motion to uniformly spread the adhesive.
Voice coil to spider – loudspeaker adhesives
1. For tight (friction) fitted parts use Quantum 135 adhesive. For loose (slip) fitted parts use Quantum 134 adhesive.
2. Apply thin film of EF Accelerator 58 to bore of the spider.
3. Shim and secure voice coil into final position.
4. Apply 360° bead of adhesive to the spider-voice coil junction.
Voice coil – spider assembly to basket
1. Apply EF Accelerator 58 to spider recess area on base of basket.
2. Place spider in final position with the flange in full contact with the basket recess area.
3. Apply 360° bead of Quantum 134 adhesive to the spider flange lip. Allow adhesive to wick into the spider fabric and penetrate to basket surface.
4. Additional mist of accelerator is recommended.
Cone to basket
1. Apply thin film of EF Accelerator 58 to flanged face of the basket (Note: on foam or paper cones apply Accelerator to flange on cone).
2. Apply 360° bead of Quantum 134 adhesive to flange face of basket. Mate parts and hold firm with ring fixture for 5-30 seconds.
Note: ring fixtures should be Teflon coated to assure proper removability.
Voice coil – spider assembly to cone
For temperature requirements less than 200°F:
1. Apply a thin film of EF Accelerator 58 to the bore of the cone and voice coil.
2. Shim and secure voice coil into final position.
3. Apply 360° bead of Quantum 147 adhesive to the voice coil-cone junction. Additional mist of accelerator is recommended
For temperature requirements greater than 200°F:
1. Shim and secure voice coil into final position.
2. Apply 360° bead of Conebonder 395 adhesive to the voice coil-cone junction.
3. Heat cure parts – @ 300°F for 1.5minutes, @ 250°F for 2.5minutes, or @ 212°F for 7minutes.
Surround to cone
1. Apply EF Accelerator 58 to contact area of surround.
2. Apply 360° bead of Quantum 134 adhesive to cone. Mate parts and hold in place for 5-10 seconds.
Dust cap to cone
For standard substrates:
1. Apply a thin film of EF Accelerator 58 to either surface.
2. Apply 360° bead of Quantum 134 adhesive to cone. Mate parts and hold in place for 5-10 seconds.
For polyolefin parts:
1. apply 360° bead of Supertacker 358 adhesive to either surface, then mate parts. High viscosity of adhesive will retain dust cap in position while fixturing. Parts are tack free in 5 minutes.
Special Applications: Kapton
Hernon voice coil bonder 360 is a high performance, single component heat cure adhesive for bonding and coating of aluminium, copper-clad, or copper wire coils and from materials including DuPont Kapton. Static heat resistance to 600°F.
Use Hernon adhesives to bond voice coil materials, including Kapton
1. For temperature requirements less than 200°F: Use Quantum 147 adhesive with EF Accelerator 58. Fixtures in seconds
2. For temperatue requirements greater than 200°F: Use Conebonder 394 heat cure adhesive. Heat tolerance to 400°F
Polypropylene – Santoprene
Hernon has the solution for bonding of polyolefin (polyethelene, polypropylene) and santoprene speaker components! Prep surfaces with EF CA Primer 42 then bond with Hernons high performance Quantum Cyanoacrylate adhesives.
Whizzer to voil coil
1. Apply EF Accelerator 58 to bore of voice coil form.
2. Apply a 360° bead of Quantum 149 to whizzer neck bond surface. Mate parts and hold secure a few seconds.
Dressing leads to cone
Apply a bead of Superacker 358 to secure dressing lead to cone surface.
Note: Hernon Ultrabond 752, UV Cure Adhesive, provides alternate assembly choice.
Lead strip rivets
1. Apply a drop of Quantum 135 to secure staking rivets.
2. Mist with EF Accelerator 58 to finish “rattle-proofing”.
Want to learn more about loudspeaker adhesives? For more technical information, visits and prices please contact us