Welcome to the updated ABI Technical Service website! For over 30 years we have been supporting and servicing select models of the finest legacy loudspeakers produced in Canada by Audio Products International. That simple fact alone speaks volumes of both the performance and pedigree of these Canadian engineered products from a time when a product was equal parts engineering, and magic.
The common failure mode for the Dual Hyperdome tweeter is long term thermal stress resulting in voice coil failure. The design life of the proprietary ferrofluid used in these tweeters is approximately 10-12 years. With time and ferrofluid degradation the tweeter not only does not sound as it was intended, it eventually suffers voice coil failure rendering the tweeter inoperative.
During the development of the Dual Hyperdome tweeter (with the assistance of the National Research Council) the ferrofluid used was specifically formulated and is very different than the widely used fluids such as APG512 used in other manufacturers components. All of our rebuilds use this proprietary formulation prepared by the same vendor API originally sourced the fluid from. This fluid is an integral component to, and the reason these tweeters sound like they do.
The rebuild process has multiple stages and is extremely thorough. Some processes involved are proprietary and have been developed through years of experience with the dual hyperdome tweeters. This results in tweeter performance and matching to a much closer tolerance than was possible during the original manufacturing process. There is not any case where a tweeter cannot be returned to its original function no matter what its condition. In rare circumstances an extra charge may apply due to a major part being completely missing or damaged beyond repair. We maintain a complete inventory of spare parts as well as complete tweeters should you be missing your originals.
ABI Technical Service is the sole factory authorized source for rebuilding these products.
Anyone else advertising their ability to rebuild them is quite simply telling you a lie. Having purchased the property, original production tooling, and all remaining parts and spares from Audio Products International prior to their sale to the Klipsch Corporation, we will continue to support these legacy products well into the future. This combined with 35 years of experience with these products ensures you a perfect rebuild to better than original factory standards and a warranty for as long as you own the product. I am fully committed to maintaining the sterling reputation, performance specifications, and upholding the level of support that has defined these legacy Canadian audio products.
Full rebuilds for tweeters are $200.00 per unit. No quantity discounts are available. The $200.00 price has not increased in over 25 years. For context the original catalogue repair price published in 1990 was $181.90. Shipping charges are the actual charges for each package and include tracking and insurance for your protection.
Total charges will be calculated once repairs, testing, and packaging have been completed and your package is ready for return shipment. Payments can be made by email money transfer or PayPal to chris@abitech.ca.
To remove the tweeters pry off the black foam trim on the face of the tweeter. This will reveal the mounting screws around the outer edge of the tweeter face. Depending on the model there will be three or four screws. Remove these then carefully prise the tweeter out of the cabinet. Do not under any circumstances remove the four inner screws on the face of the tweeter. The connecting wires are phased so they cannot be connected the wrong way around. Carefully disconnect the leads from the tweeter.
Please be sure to individually wrap each tweeter in bubble wrap with a cardboard (or similar) spacer covering the cone or diaphragm face to avoid damage. Please do not use newspaper, "popcorn" style foam, or large air bag type packaging as the components have substantial mass and can work themselves loose during transit leading to damage. Small bubble wrap or foam sheet style packaging are the ideal to wrap your components in. The black ABS plastic faced models are particularly fragile and special attention should be paid to wrapping and packaging to avoid shipping damage. Failure to package properly may result in additional charges due to damage to the tweeter components.
All incoming shipments must be made by POSTAL SERVICE ONLY.
Shipments within Canada - Please ship by Canada Post.
Shipments from the USA - Please ship by UNITED STATES POSTAL SERVICE. My Canadian postal address as follows will provide me with an email notification on your parcels arrival at our local post office. This also assures the parcel, marked correctly, does not impose any duty or importation clearance charges. Please complete the postal and customs declaration forms carefully.
Clearly mark "MADE IN CANADA” in the “Country of Origin” field, and “RETURNING FOR FACTORY SERVICE” in the Reason for Importation field.
Shipments from outside of Canada and the USA - Please contact us by email for specific directions.
ABI Technical Service
PO Box 99900
JW 479489 Stn Main
Enfield, Nova Scotia
Canada, B2T 0M9
Please feel free to reach out regarding any further questions or concerns you may have prior to shipping your components. The more information we can exchange the more satisfying an experience we can provide.
