* The inscriptions or colors on the product may differ slightly and the information in the description is written in general, so not all product features may be mentioned.
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POLY QRD 1D acoustic diffuser
POLY QRD 1D diffusers - an effective way of stopping FLUTTER ECHO direct sound reflections by dispersing sound energy in the room. The diffusers can be mounted on walls and ceilings and we recommend combining them with POLY50, POLY50Q and POLY100 acoustic panels.
Technical specifications:
Colour: black
Type: QRD N11 1D
Central frequency: 1163Hz
Range: Scatter 581 Hz; Diffuse 1163 Hz; HF cut-off 6370 Hz
Diffusion frequencies: 1163Hz; 2326Hz; 3489Hz; 4652Hz; 5815Hz
Dimensions: 594mm x 594mm x 136mm (±2mm)
Material: Polystyrene foam EPS-100 EN13163:2010+A1:2015
Flammability class: E
Colour: black
Installation: In accordance with the manufacturer's recommendations. Can be mounted to POLY series panels with special fasteners or glued to surfaces with polystyrene adhesive.
Online Banking
We offer customers the possibility to pay for products through any Lithuanian bank's online banking system. These payments are fully automated and completed within seconds. This is the most popular payment method in Lithuania.
Payment Card
Payment by credit card is the most popular payment method in the world. In our online store, we offer convenient payment with debit and credit cards.
Paysera
We use the most popular Lithuanian payment system, which allows you to pay using all the most popular methods, including purchases by installments.
PayPal
One of the most reliable payment systems in the world offering convenient payment for goods, shipment tracking in the PayPal system, and many other conveniences.
Cash on Delivery
Pay the courier in cash upon delivery. In large cities, it is very often possible to pay the courier by card as well, but it is advisable to inquire with the courier service about the possibility of paying by card upon receiving a notification about the planned delivery time of the goods.
Bank Transfer
With this payment method, we allow customers to make a regular bank transfer at a bank branch or by logging in to online banking and entering the transfer details themselves. This payment method is not the most convenient or fastest.
Payment Details:
When making a payment, please indicate only the order number.
** All information about delivery and payment options can be found here - Delivery & Payment options.
*** Caution! Note that carrier is delivering goods to the doors if the parcel weight is not higher than 30 kg. All parcels higher than 30 kg must be handled by client.
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