Panamax M4300-EX Power Line Conditioner and Surge Protector

Panamax M4300-EX Power Line Conditioner and Surge Protector


Jeff Got scammed a few times - Luckily he found SpenCertified!

Home theaters have it rough: they're constantly bombarded by electromagnetic interference (EMI) and radio frequency interference (RFI) through their power cords, which can effect the overall performance of your system. The Panamax MAX 4300-EX solves that: designed to filter out that unneeded noise and supply clean power to your system, this power conditioner protects your equipment. So if you're wanting to upgrade your system and improve its performance, than the M4300-EX is definitely the way to go!


SPENCERTIFIED- Fully certified by Spencer

Refurbished and SPENCERTIFIED

Every function has been confirmed 100% working. We have cleaned it inside and out and replaced any worn parts. A recap was performed if necessary. All pots, knobs, connectors and boards have been cleaned with CRC cleaner.

Cosmetic Condition: Very Good.

Functional Condition: Very Good.


  • Panamax M4300-EX Power Line Conditioner and Surge Protector
  • Manual

Other information about the Panamax MAX 4300-EX

  • Automatic over and under voltage protection
  • Protect or disconnect AC surge protection
  • Application specific coaxial signal line protection
  • Telephone and LAN line protection
  • 8 AC outlets in two isolated banks:
    • four switched outlets
    • four always-on outlets (including 1 high-current)
  • Surge and over- and under-voltage protection
  • Filtration circuitry virtually eliminates line noise
  • One set antenna/cable coax connections
  • One set digital satellite TV in/out coax connections
  • One RJ-11/RJ-45 phone line input
  • One RJ-45 phone line output for satellite receiver or DVR
  • One RJ-45 phone line output for DSL line
  • Optional brackets for rack-mounting
  • Maximum current rating: 15 amps
  • Power, writing OK, and unsafe voltage LED indicators


  • 17" x 7.63" x 2.2" (Length x Width x Height)


  • Made in China

Customer Reviews

Edward W.

Customer Since December 2017

I have always been impressed with the items I received even after a couple years they continue to work. This is the reason why I always keep returning as a customer.

Alexander W.

Customer Since March 2018

For the price I paid the quality was great and I use my 400 Disc cd changer everyday.


Customer Since July 2018

Very happy with what we got! I made the mistake of first getting this item from Amazon and received it not working at all... I will order from them again and highly recommend them to everyone!

John D

Customer Since August 2018

For a couple of years, I have been looking for a replacement for my Toshiba DVD Recorder that was starting to break down. I had placed four orders with Amazon....3 of the recorders did not work and had to be returned, the fourth order was canceled by the seller before shipping with no explanation. An internet search brought me to and I found a refurbished Toshiba recorder similar to the one I was using. Without high expectations, I placed another order with them. SpenCertified let me know when my order was placed and kept me fully updated during the shipping process. The recorder arrived in about 4 days (much quicker than I anticipated) and works perfectly. The box included the recorder, remote and users' manual and advertised. I am very satisfied with my experience with SpenCertified and plan to order additional equipment from them. I highly recommend them.


Customer Since May 2020

I was totally amazed with the speed of delivery for my order. Ordered on May 4 and received on May 8! It was very thoughtful of them to email me to offer assistance and to ensure I was happy with my purchase. Great Job!

Jan S

Customer Since March 2018

Being a senior who refuses to give up VCR'S, I was in a panic because my last one died and no one sells them anymore in CA. Luckily I discovered SpenCertified, and will never have to worry again. I can't begin to tell you how pleased I am with the fantastic service they provide. My sets arrived in a timely manner, extremely well wrapped and the friendly emails offering any help were appreciated. I will continue to do business with them in the future and plan to refer them to all my friends. Thank you, guys... YOU CAN BUY WITH CONFIDENCE.

Evelyn S.

Customer Since March 2018

When my beloved VCR died, I discovered new ones were not being manufactured as before. All my tapes, collected over many years - - lost!? All future recordings - - lost!? What to do? Then, I discovered SpenCertified. I was wary. Was this a scam? I was afraid. Would my purchase truly be guaranteed? I wanted, I NEEDED, a working VCR, so I made my order. The packaging was perfect, the VCR was even better than advertised, Spencer was extremely helpful. I am a very satisfied customer. 


Customer Since June 2018

I just got my vhs dvd player in the mail. I was so impressed how well they kept me informed about it. When i got it it was well packaged no problems. We hooked it up and works great. Thank you so much will do buisness again.

Clifford Escover

Customer Since May 2019

I searched the stores and then the web looking for a Bluray player w/ HDMI & RCA audio outputs ; they hadn’t made them in years Was quite a search ... then I found SpenCertified .. I purchased a refurbished LG BD 300, it came with all cables,owners manual and remote 😂😂 with batteries ! And looks brand new !I am extremely pleased. Highly recommend and we will be purchasing again when we need to find a hard to get item.