25+ Years of Audio Excellence

Elevating Sound With Precision Engineering

Flatline Acoustics is a 25+ year old American owned company with offices in Shanghai and Shenzhen, information pills China. Our proprietary brand name, abortion Flatline Acoustics, includes more than 70 models covering architectural speakers, outdoor speakers, Infrared products, internet radio and accessories.There are multiple levels of quality of components used to suit any budget or installation. Our American based China team is always working on new products as well as listening to our customers so that we can develop new products to meet their needs

Flatline Acoustics was established in 2000 and built on giving our dealers the best product possible at the most competitive price in the market. We are the manufacturer here in China which translates to profits directly to the bottom line of our distributors. The simple fact of eliminating 2 or 3 middle men can make a big difference in the costs. Flatline Acoustics is manufactured in the same facility as many of the large USA custom install brand names. Check the packaging of your current product, is will say “MADE IN CHINA”. While other companies buy from China, they rely on 3rd party inspection companies or the factory quality control systems. Our American team has lived here long enough to see so many failures by other companies. That is the main reason we keep our American team on line full time here in China to guarantee our consistent quality. Just ask some of our current distributors! Flatline Acoustics has implemented quality control procedures at our factory in order to make sure we get the best outcome every time. From PIQC “Parts Incoming Quality Control” to on-line assembly process controls and AQL testing upon completion.

Flatline Acoustics is now distributed to more than 40 countries through an exclusive distributor network.We continue to add more dealers each month. We would hope that you would take the time to review our site, and let us know which product you like so you can try a sample. The current companies installing Flatline Acoustics are available to contact directly. We could write many pages here but we prefer to let our products speak for themselves.

150+

500+

Trusted by Professionals

Quality Assurance

40+

Countries

woman wearing yellow long-sleeved dress under white clouds and blue sky during daytime

The sound quality of Flatline Acoustics speakers is unmatched, elevating my audio experience to new heights.

John Doe

A sleek, wooden audio speaker with a unique curved shape rests on a metallic table. The speaker features rounded edges, a wood finish with a central knob, and black speaker covers. The finish has a rich, dark wood grain accented by metallic elements.
A sleek, wooden audio speaker with a unique curved shape rests on a metallic table. The speaker features rounded edges, a wood finish with a central knob, and black speaker covers. The finish has a rich, dark wood grain accented by metallic elements.

I am thoroughly impressed with the craftsmanship and performance of Flatline Acoustics' high-end speakers and accessories.

Jane Smith

A circular portable speaker with a perforated grill and brown leather strap lies on a two-toned surface, featuring light wood and dark brown colors. The speaker has a small monogrammed tag attached to the strap.
A circular portable speaker with a perforated grill and brown leather strap lies on a two-toned surface, featuring light wood and dark brown colors. The speaker has a small monogrammed tag attached to the strap.
★★★★★
★★★★★

Our Location

Flatline Acoustics is based in a vibrant area known for innovation in high-end audio manufacturing.

SHANGHAI MONTSHINE TRADING LIMITED

No.99 HuiChuan Road, Room 2003-24, ChangNing Distrect, Shanghai, China.

No.10 Road, Gao Xin Nan, Nanshan, Shenzhen, China 518000

SHANGHAI MONTSHINE TRADING LIMITED - WAREHOUSE