Bosch MUM9A66R00 OptiMUM - 1600 W and 5.5 L Bowl
Published on 09/23/2026 at 12:05 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Bosch MUM9A66R00 OptiMUM is a Series 8 stand mixer with a 1600 W connection rating, a 5.5-liter stainless steel bowl, and a red-and-silver finish. Bosch lists the model with seven speed settings and a maximum dough-bowl content of 3.5 kg.Bosch's model specifications
Large Bowl Heavy Dough Capacity
The stainless steel bowl measures 5.5 liters, while the listed maximum content for dough is 3.5 kg. That combination places the MUM9A66R00 above compact mixers designed around smaller bowls and lighter batches.
Bosch lists the appliance dimensions as 317 x 222 x 395 mm in height, width, and depth. The specification page also identifies the housing as part of the Series 8 OptiMUM range and states that the model has no integrated scale.
Seven Speeds And Metal Bowl
The machine provides seven speed settings for kneading, mixing, and whipping. Its stainless steel bowl is the central capacity feature, while the 1600 W rating is the headline electrical specification.
The German Bosch listing identifies the same MUM9A66R00 designation and records the product as no longer available in that market. Its listed specifications match the 1600 W rating, 5.5-liter bowl, 3.5 kg dough capacity, seven speeds, and 317 x 222 x 395 mm dimensions.Bosch's model listing
US Support And Product Position
Bosch's US support system identifies the appliance as kitchen machine model MUM9A66R00/01. The support entry provides a US customer-service telephone number and model-specific parts and accessories information.Bosch's US support entry
Robert Bosch LLC is listed as responsible for Bosch's US internet pages, with an address in Farmington Hills, Michigan.Bosch's US corporate information
Who The MUM9A66R00 Fits
The MUM9A66R00 is best positioned as a high-capacity planetary stand mixer for home baking that involves substantial dough or batter quantities. Its 5.5-liter bowl and 3.5 kg maximum dough content favor larger batches, while the 317 x 222 x 395 mm footprint requires dedicated counter space.
Compared with smaller stand mixers, the Bosch offers a larger stated bowl and a higher listed dough capacity. The tradeoff is its 1600 W electrical rating and 9.6 kg net weight, which make it a substantial countertop appliance rather than a lightweight hand-mixer substitute.
The model's lack of an integrated scale limits its built-in measuring functions. For users who want large-batch mixing, seven speeds, and a stainless steel bowl, the documented specifications make the MUM9A66R00 a focused stand-mixer choice; users seeking compact storage or integrated weighing should look elsewhere.
Bosch MUM9A66R00 At a Glance
- Product: Bosch MUM9A66R00 OptiMUM Series 8 kitchen machine
- Manufacturer: Bosch
- Category: Planetary stand mixer
- Power rating: 1600 W
- Speed settings: 7
- Bowl capacity: 5.5 l
- Maximum dough-bowl content: 3.5 kg
- Dimensions: 317 x 222 x 395 mm
- Net weight: 9.6 kg
- Target audience: Home bakers preparing large dough and batter batches
