Terms, Delivery and Privacy

subboxpro.com (BoxForge) is run by Aleksandar Kostadinov (individual seller), 2 Asen Hristoforov St, 4004 Plovdiv, Bulgaria. Email: a.kostadinov09@gmail.com, phone: +359 88 243 8171.

Box plans (digital product): a drawing, panel cut list, net volume and port tuning for a subwoofer enclosure, calculated from the parameters you enter. Price: €5. Delivered by email and to your account, worldwide.

Custom-built subwoofer boxes (physical product): handmade to your dimensions and delivered within Bulgaria only.

All prices are in euro and shown before payment.

Your order is accepted when you receive a confirmation email. You can pay by card online (processed by Stripe) or cash on delivery for physical boxes. We never store your card details.

EU consumers normally have 14 days to cancel a purchase. For digital content this right ends once delivery starts with your explicit consent. Before paying, you confirm that you want immediate delivery and understand you lose the right to cancel.

Even so, if your plan does not arrive, the file is broken, or there is a calculation error on our side, we will fix it or refund you. Email a.kostadinov09@gmail.com within 14 days of purchase.

Boxes are made to your personal specifications, so the 14-day right of withdrawal does not apply to them (Art. 16(c), EU Directive 2011/83).

If a box arrives damaged, in the wrong dimensions, or with a build defect, you are entitled to a remedy. Contact us as soon as possible after delivery, with photos. We will repair it, rebuild it or refund you. You also keep the 2-year legal guarantee of conformity.

Please check the parcel in front of the courier. If it is visibly damaged, refuse it and contact us.

Calculations are based on the parameters you enter. We are not responsible for results caused by incorrect driver parameters or inaccurate measurements of your vehicle space. Installation in the vehicle is your responsibility.

If something goes wrong, please contact us first and we will work it out. You can also contact the Bulgarian Commission for Consumer Protection (kzp.bg). Bulgarian law applies.

Your plan is emailed to you automatically and appears in your account right after payment, usually within a few minutes. If it has not arrived within 1 hour, check your spam folder and email us at a.kostadinov09@gmail.com. Delivery is free and available worldwide.

• Build time: 3–5 business days after your order is confirmed.
• Courier: Econt or Speedy — to your address or a courier office, anywhere in Bulgaria.
• Delivery time: usually 1–2 business days after dispatch.
• Shipping cost: courier rates, paid by the customer.
• Payment: cash on delivery or card online.

You will receive a tracking number when your box ships.

We ship physical boxes within Bulgaria only. Outside Bulgaria? Order a box plan and build it yourself or with a carpenter.

When you order a box or buy a plan, we collect your name, email, phone and delivery address or courier office, plus the box dimensions and parameters you configured. We need this to fulfil your order and to contact you.

Payments are processed by Stripe. We never store your card details. Delivery is handled by Econt or Speedy, who receive only the data needed to ship your parcel.

The site uses Google Analytics (GA4) and Google Ads to measure visits, the pages you view, and which ads lead to an order or plan purchase. This data is sent to Google LLC and used for statistics and to optimise our ads. For this, device identifiers, IP address, approximate location and your actions on the site are processed.

More about how Google processes data: business.safety.google/privacy.

If you are in the EU, UK, Switzerland or Canada, these cookies load only after your explicit consent via the banner on your first visit. Declining does not limit your use of the site or stop you from ordering.

You can change your choice at any time with the button below. Withdrawal takes effect immediately and stops new data being sent to Google.

Cookie settings

We keep order data as long as needed to fulfil the order and for accounting purposes. You have the right to access, correct and delete your data. Email a.kostadinov09@gmail.com or see our contact page.