Bose Amplifier Repair

Sound systems installed in Mercedes vehicles are high end Becker/Bose systems, which use the Bose brand amplifiers and speakers. The reason why the Bose systems sound so crystal clear is because of the low speaker impedance and high amplification which enunciate every sound wave in the audio stream. In the early 90s, it delivered the best quality sound available in any vehicle then, and is still comparable to sound systems today. Each amplifier is specifically tuned to the speaker it drives with unique frequency response delivering deep bass, rich mid-tones or highs, depending on its location in the vehicle.

Application: 1990-1993 Bose Beta Sound System w/optional CD Changer Models: 1990-1993 W140 Part#: 140 820 00 89 Features: 2-Channel inputs - left & right Thumbwheel cross-fade - front to rear 7 Channels / Amplifier modules, driving 11 speakers : 1 Centre speaker (CF) 4 Front speakers - left & right (LF,RF) 4 Rear speakers - left & right (LR,RR) 2 Mono Bass speakers - left & right (LW,RW)

Application: Bose Sound System - Cadillac Models: 1997-2002 Part#: 90 493 880, depends on model etc. Features: 6/7 Channels : 1 Centre speaker 2 Front speakers - left & right 2 Rear speakers - left & right 1/2 Mono Bass speakers - left & right

Application: Bose Sound System - Mercedes (Fiber/Non Fiber) Models: 1994-present Part#: 02 820 05 89, depends on model etc. Features: 6/7 Channels : 1 Centre speaker 2 Front speakers - left & right 2 Rear speakers - left & right 1/2 Mono Bass speakers - left & right

Bose Amplifiers degrade over time, losing their crystal clear sound and eventually begin to hiss, pop, and eventually explode into loud buzzing as components expire. The unique characteristics and impedance of the Bose speakers are incompatible with modern head units, thus there are no aftermarket equivalents to substitute with OEM equipment. MBCluster can repair the amplifier, bringing the music experience back to original factory specifications.

Rebuild Service

Complete tear down of all components - amplifiers & motherboard Thorough determination of source of failure Replacement of all electrolytic capacitors with equivalent or better Japanese types Replacement of all failed IC amplifier/preamp processor chips Comparison of all amplifiers with OEM specifications including : input pre-amp audio levels output amplified levels and signal shapes IO resistances based on OEM values Thorough final audio test including test signals and real audio signals of frequencies spanning the spectrum

Sending In Your Unit

1. Fill out the online Repair Form, and include it with your unit :
   
2. International customers, ex. United states, Europe, must fill out the customs documented, and follow the shipping instructions available here.
3. Bundle the unit up in ample padding and place it in a sturdy box. Address is located at the bottom of the Repair Form. Please note : Only USPS may be used for American shipping! Canadian shipments may use private couriers such as UPS, FedEx, etc., all other countries must use their federal postal services.
4. Once we have received the unit and diagnosed the fault, we will e-mail an update. If you are satisfied with the diagnosis, we will begin repair accordingly. Final payment is done using the easy PayPal system, with Invoice sent in the email exchange. If for whatever reason, you have decided to decline service, or service is not possible for your unit, a shipping charge is required to send it back.

Pricing

Bose Beta Amplifier Repair Part#: 140 820 00 89	$450
Most other Amplifiers	$275

Note: After July 1, 2010: All Ontario & BC residents add 13% HST, other Canadian provinces add applicable taxes.

United States and other foreign countries do not add taxes.

Email : Info@MBCluster.com