acoustic vertical window blinds

have you checked lowes or home depot  ?

One solution that will work better than any blinds or shades is to attach a number of ASC or GIK absorber/diffusers (like the ASC sound planks) using Velcro tape. This will be fully removable when you leave and you can also take it with you. Finally adding a Marigo VTS window dot to the glass will also help

@folkfreak What do the Marigo VTS window dots do? Do they absorb the sound vibration on the glass?

My listening room has windows behind the speakers and also along one long wall. After trying absorbers and diffusers, I finally got a great sounding room using the Synergistic Research HFT products. They are easily removable and so can be removed and taken to the next house when the time comes. Also they are not visually distracting.

David Pritchard

Re Marigo VTS Dots: Marigo Dots come in various sizes depending on application - from capacitors to circuit boards to electron tubes to speaker cabinets to walls to windows. The dots operate via constrained layer damping. To whit,

”Beginning in the early 1930s a variety of theoretical and experimental research has been published regarding the development and use of damping. What began as an experiment to reduce noise and vibration in metals and plastics has become a common treatment in an amalgam of applications. Constrained-layer damping (CLD) is a specific method of treatment commonly used in the aerospace and military industries. CLD may be described as a type of shear-related energy dissipation achieved by interconnecting two or more structural materials using a relatively thin viscoelastic layer. Among the advantages of using CLD as a damping treatment are the ability to obtain high loss factors with relatively thin configurations and that the stiffness of the composite system is not markedly increased.”