Please rethink your purchase from here. His return or may I say replace policy is terrible. Only plan of replacing a faulty amp 1 time any other time he will talk down to you as if you're a child and you're stuck with a paper weight. The first amp was faulty and the second lasted 4 days. All electrical was up to par and it wasn't user error so no one can blame it on that. He just let go two of his best employees. One was his enclosure builder. Now no one else is building enclosures for him and if so no where near as great as the original. The second was in charge of packaging, shipping and delivery. I normally don't do reviews but the people must know. He got greedy what happens when you get greedy you lose it all. OH and who charges 25$ for his signature that when he's not there to sign it someone else does...

Trash Customer Service Purchased a couple of 12s from them, both were damaged. Made me pay shipping to get them fixed, and also made me pay the restocking fee even though I reached out the same day I received them. Customer service sucks, and if you receive a damaged item, it’s not their problem, and don’t expect to get your money back.

Find another place if you want customer service Placed a order on Sept 20th UPS label marked shipped.I haven't received and UPS says they haven't received the items. When emailing either no response or the ones they answer is no answer. Customer service is the worst I've dealt with in a company and I've ordered alot of stuff from other places with no issues. The person that helped me seemed more suited with a coloring book and crayons than customer service. First and last time ordering from them.

Agree with the rest, they don't care about customers! Man, I'm glad I started off light, I planned on purchasing 90% of my system through them. That's not going to happen now. I purcahsed 38 sqft of the 3 in 1 240 mil deadner sheets and 19 of the 23 sheets have the adheasive missing from the 1/8" to 1/2" from the end. This must be cut off and can't be used. I contacted support, sent pictures, they assured me that they have sold "10's of thousands of sheets of them" and this is the first time they are hearing of this. Yeah.. right. So, I go back and forth through their ticket system and was told they were going to send out replacements on Jan 25th, 2023. I asked for an update on Feb 17th and on the 20th, they are asking if I still have the bad sheets. Which, of course I do, I stopped the build till this could get fixed. It appears on the 25th, they were jus trying to get me to go away. It appears they have no intention of replacing the bad sheets. Their communication is the worst, I'll not be purchasing anything from D4S again.

Worst customer service. First, in 2020 I bought two amps.with extra warranties for 2 years, on 2021 they get smoked, so I asked Wolfram to send me the RMA # to send them for fix. (to: The Amp Lab, in Fairfield, Maine.) I paid the shipping, and finally they fixed. Last year I bought another one, but Last February 2022 one of those they have fixed it smoked again. 45 days ago I have been tried to contact Wolfram by e-mail, on Facebook, by phone, but the 2 phone numbers I have are disconnected, gues maybe they went out of business, if so I'm pretty sure Down4Sound and JP know Wolfram is out of business, wouldn't be better if they tell us the truth, what is going on, be honest with the customers, unexpected things happen but not "beat around the bush" Also I messaged JP on Instagram, (he never answer me back) sent a message to: Down4Sound page too, called Down4sound like 3 times, to get support from them and they just told me: they are so busy, "you need to be patient" I contacted: Colin Buckeye (used to be like a Wolfram Key principal, but he's no more working there) through a message and he gave me the name of Tim and his phone # so until the 2nd time I called him he call me back and gave me the RMA link, and still waiting for Wolfram response, I'm pretty sure I won't ever gonna receive it. Don't waste your money and your time in here, look for a well established company, like: Sonic Electronix, Online Car Stereo, Crutchfield, etc.