Contact Granger Amplification


+1 205-774-0350
During business hours 9:30 AM – 5:30 PM CT Mon-Thur.
9:30 AM – 4:00 PM CT Friday

Note: Email is preferred for tech related questions and support. Please see our Warranty, Shipping, Repair, and General Policies page before contacting us, as answers to many frequently asked questions are already posted here.

Granger Amplification LLC
132 Pinecrest Rd
Hueytown AL 35023-1321

For support of Granger products, please use the contact form to email us. Replies will be answered as soon as possible.

If you are missing links to online instructions, log in to your  Account and go to Order History. If you did not receive an order status email, please check your spam folder, and add to your email client whitelist.

For Granger product-related questions, sales inquiries, custom amp options and customer support, please send us a message from the form to the right, or call. If you don’t reach us right away when calling, please leave a short, precise message, with the nature of your issue. Due to call volume and marketing calls, we can only return calls from callers who leave a message, and clearly explain why they are calling. Please note: We do not service solid state power amps, stereo hifi or car audio items. Due to liability concerns, we do not answer other manufacturer product inquiries, or give general repair advice.

Visits to the shop are by appointment only; unscheduled visits are not permitted. Please email, telephone, or use our Schedule Online Appointment feature. Please note: online appointments should be made at least 24 hours in advance of desired timeslot, so that we have time to respond to email notifications. Under no circumstances should an appointment be made for the same day using the Online Scheduler.

Shop Hours

Monday – Thursday: 9:30am – 5:30pm CT by appointment only
Friday: 9:30am – 4:00pm CT by appointment only
Saturday, Sunday: CLOSED
US Holidays: CLOSED

Our average turnaround times:

For stock amp builds (as of 10/01/2023): NA
For custom amp builds (as of 10/01/2023): NA

For most repairs: 7-10 business days (non-stocked, special parts orders can extend this time).
For extensive modifications and amp rebuilds: 10 weeks, as these jobs go into the amp build queue.

We offer Expedited (Rush) Service at a rate of $60/half hour for repair service.
We offer Top of Queue Service at a one-time fee of $200 per item for amplifier orders.

Please note: Due to the current supply chain issue, build, repair, and modification turnaround times may be extended indefinitely based on availability. If you have any concerns please contact us before ordering.