Panamax MR4300 Surge Protector

Product Overview

The Panamax MR4300 surge protector is a rack-mountable 9-outlet power management unit providing AV-grade surge protection, AVM (Automatic Voltage Monitoring), and Level 3 LiFT linear filtration for home theater and commercial AV rack installations. It includes a dedicated 4-outlet high-current bank with low-impedance filtration, signal line protection for LAN, telephone, and cable/satellite connections, and rotating media lights — all at 15A capacity in a compact 1RU-height form factor. The MR4300 is well-suited for AV integrators building out equipment racks that require both Protect or Disconnect surge protection and visual media lighting for component identification.

Product Description

The Panamax MR4300 is a rack-mountable power management unit delivering multiple layers of protection for AV rack systems. AVM (Automatic Voltage Monitoring) continuously monitors incoming line voltage; if voltage drops below 100V or rises above 140V, the MR4300 displays a red lightning bolt alert and automatically disconnects power to all 9 connected outlets, reconnecting when conditions normalize. Protect or Disconnect surge protection handles extreme events — such as lightning-induced surges — by instantly cutting all AC power to connected equipment before the event can damage components, then restoring power once clear.

The 9 outlets are organized into 2 isolated banks: Bank 1 contains the standard filtered outlets (5 outlets), and Bank 2 is a dedicated high-current bank with 4 outlets and low-impedance Level 3 LiFT filtration for amplifiers, subwoofers, and other high-draw equipment. Bank-to-bank noise isolation prevents electrical interference generated by high-current equipment from contaminating the signal path of sensitive audio and video components. All outlet control is through the front-panel power button.

Signal line protection is included for 1 LAN (RJ-45, 10/100/1000bT), 1 telephone line (RJ-11), and 2 coaxial cable/satellite connections. A rotating and dimmable pair of media lights illuminate the equipment bays for identification and servicing. A front-panel USB charger (500mA) and LED voltmeter display are included. The MR4300 ships with an 8-foot captive power cord and rack ears for standard 19-inch rack mounting. It is covered by a 3-year product warranty and $5,000,000 Connected Equipment Protection Policy.

Key Features

• 9 protected and filtered outlets across 2 isolated banks
• 15A maximum current rating (1,800W)
• Rack-mountable, 1RU height (17" W x 6" D x 1.75" H) with included rack ears
• AVM (Automatic Voltage Monitoring): auto-disconnect on over/under voltage, auto-reconnect on recovery
• Protect or Disconnect surge protection: L-N, L-G, N-G protection modes; 1,575 Joules energy dissipation
• Level 3 LiFT linear filtration; dedicated 4-outlet high-current low-impedance bank
• Signal line protection: 1 LAN (RJ-45), 1 Tel (RJ-11), 2 Cable/Satellite
• 2 rotating, dimmable media lights for equipment illumination
• Front-panel LED voltmeter and USB charger (500mA)
• 8 ft. captive cord with low-profile plug; 3-year limited warranty

Typical Applications

• Conference room AV racks requiring high-current outlets for amplifiers alongside protected signal equipment
• Boardroom AV systems where component identification via media lighting aids serviceability
• House of worship AV racks with high-current amplifier loads and coaxial signal inputs
• All-hands rooms and multi-purpose spaces with mixed rack AV equipment
• Commercial meeting spaces needing AV-grade surge protection in a compact form factor
• Government AV installations requiring rack-mount power protection with signal line coverage

Technical Specifications

FAQs

Level 3 LiFT Noise Filtration Measured by Bank

Panamax publishes actual attenuation figures for each bank rather than a single headline number, which is what lets you predict how the MR4300 will behave with a mixed AV load. Bank 1 is tuned for line-level and low-current source components; Bank 2 trades peak attenuation for the low impedance that amplifiers need to draw current on demand.

Practical takeaway for rack layout: put sources, DSPs, matrix switchers, control processors and video gear on Bank 1 where filtration is strongest, and reserve Bank 2 for power amplifiers and subwoofers. Because the two banks are filter-isolated from each other, switching noise generated by a Class D amplifier on Bank 2 is attenuated before it can reach the sensitive components on Bank 1 — which is the whole point of a banked conditioner over a plain rack strip.

Signal-path specifics worth confirming during commissioning: the coaxial protection is bidirectional with a 0 MHz to 2.2 GHz frequency range and HD 1080i capability, and the RJ-45 LAN protection supports 10/100/1000bT with a clamping level of 62V ±6V at 1 mA.

Panamax MR4300 vs. MR5100 vs. M4315-PRO

These three are the models integrators genuinely cross-shop, and the differences are not subtle. The MR4300 is the compact 1RU workhorse; the MR5100 adds a third bank with sequencing and more joules; the M4315-PRO adds individually controlled outlets and network monitoring.

Choose the MR4300 when rack space is tight, the load is a conventional AV stack under 15A, and you want AVM plus banked filtration without paying for network control. Its 1RU height and shallow 6" depth make it the easiest of the three to fit into credenza racks and shallow wall-mount enclosures, and it is the only one of the three with media lights. Choose the MR5100 when you need a delayed high-current bank so amplifiers come up after the rest of the system, plus higher joule capacity — accepting 2RU and 12" of depth. Choose the M4315-PRO when the rack needs individually controlled outlets, remote reboot of a locked-up device, and BlueBOLT network monitoring — the standard answer for unattended or multi-site deployments where a truck roll to press a power button is expensive.

What's in the Box

• Panamax MR4300 power management unit
• 8 ft. captive AC power cord with low-profile plug (attached)
• Rack ears for 19-inch rack mounting
• Owner's manual and reference guide

One thing to confirm before you order: Panamax's current MR4300 product page lists rack ears among the included accessories, while older revisions of the MR4300 owner's manual state that rack ears are not included and are sold separately. If rack mounting is required on day one, confirm rack-ear inclusion with us when you place the order rather than discovering it on the install.

Deployment Notes for AV Racks

Rack space and fit. The MR4300 occupies a single rack unit at 1.75" high (2.19" with the feet installed) and is 17" wide by only 6" deep, so it fits shallow credenza racks and wall-mount enclosures that will not take a 12"-deep conditioner. It weighs 6.5 lb, so it needs no additional support beyond the rack rails. Because the 8 ft. AC cord is captive, plan the unit's rack position relative to the receptacle before finalizing the elevation — you cannot swap in a longer cord.

Load planning at 15A. The MR4300 is rated for 15A maximum, which is 1,800W at 120V. Standard practice is to design to roughly 80% of a branch circuit's rating for continuous load, so budget around 1,440W of steady-state draw and leave the remainder as headroom for amplifier transients. Amplifiers and subwoofers belong on the four low-impedance Bank 2 outlets, where filtration is deliberately relaxed so they can pull current on demand; everything else goes on the five Bank 1 outlets. If the total system draw approaches or exceeds 15A, split the load across two conditioners on separate branch circuits or move to a 20A unit — do not daisy-chain conditioners.

No sequencing and no voltage regulation. Two capabilities are commonly assumed and are genuinely absent on this model. First, there is no sequenced or delayed turn-on: the front-panel power button switches all outlets together, with front-panel on/off indicators for Banks 1 and 2. If a system needs amplifiers to power up after sources to avoid thump through the speakers, specify the MR5100 with its high-current delayed bank or a BlueBOLT Pro Series unit with per-outlet timing. Second, the MR4300 does not regulate voltage. AVM monitors and disconnects at unsafe voltage; it does not buck or boost incoming voltage back to nominal the way a regulating unit does. On sites with chronically sagging voltage, that means an MR4300 will drop the load rather than correct it, so consider a voltage-regulating model instead.

Front-panel behavior at commissioning. The LED voltmeter gives you incoming line voltage at a glance, and the unsafe-voltage indicator is normally dark — when it lights, the unit has disconnected the load because incoming voltage left the 100V to 140V window. The media lights have their own on/off control and can be illuminated even when the outlets are switched off, which is useful for locating gear in a dark rack. Record the resting voltmeter reading during commissioning; it becomes the baseline for diagnosing later AVM disconnect complaints.

Documentation & Resources

• Panamax MR4300 official datasheet (PDF) — full electrical specifications, filtration figures by bank, coax and LAN protection data.
• Panamax MR4300 owner's manual (PDF) — installation, front-panel controls, AVM behavior and troubleshooting.
• Panamax MR4300 reference guide (PDF) — quick-reference specification and feature summary.
• Panamax MR4300 manufacturer product page — current specifications, accessories and warranty terms.

More Questions About the Panamax MR4300

Does the MR4300 have sequenced or delayed turn-on?
No. The front-panel power button switches all nine outlets together; there is no delayed bank and no per-outlet timing. The front panel does provide separate on/off indicators for Banks 1 and 2, but that is status indication rather than independent switching. If your system needs amplifiers to come up after sources — the usual reason for wanting sequencing — step up to the MR5100, which includes a high-current delayed bank, or to a Pro Series model with BlueBOLT scheduling.

Does the MR4300 regulate or stabilize voltage?
No, and this is an important distinction. AVM monitors incoming line voltage and disconnects the load if it drops below 100V ±2V or rises above 140V ±4V, reconnecting automatically once voltage returns to a safe range. It does not buck or boost voltage back toward 120V. For sites with chronic brownouts or sustained low voltage, a voltage-regulating power conditioner or a UPS with AVR is the correct specification.

MR4300 or MR5100 — which should I buy?
Choose the MR4300 if rack space or depth is constrained, since it is 1RU and only 6" deep versus the MR5100's 2RU and 12" depth, and if you want media lights for servicing a dark rack. Choose the MR5100 if you need 11 outlets instead of 9, a third bank with delayed high-current turn-on, higher energy dissipation at 2,025 joules versus 1,575 joules, or Level 4 rather than Level 3 filtration. Both are 15A and both carry AVM and the same warranty and connected-equipment policy.

How does the MR4300 compare with the M4315-PRO?
They are both 1RU and both 15A, but they solve different problems. The M4315-PRO adds eight individually controlled rear outlets, four filter-isolated banks, a volts/amps combo meter, 2,700 joules of energy dissipation and BlueBOLT network monitoring and control over TCP/IP. The MR4300 has no remote control and no per-outlet switching, but it has a lower 330V Voltage Protection Rating under UL 1449 3rd Edition versus the M4315-PRO's 500V — a lower VPR means the protector clamps closer to line voltage — plus media lights and a shallower 6" chassis. Specify the M4315-PRO for unattended or multi-site racks where remote reboot saves a service call; specify the MR4300 for attended local systems on a tighter budget or in a shallow enclosure.

How much equipment can I actually plug into a 15A MR4300?
15A at 120V is 1,800W absolute maximum. Design to roughly 1,440W of continuous load to stay within the customary 80% rule and leave headroom for amplifier peaks. Sum the nameplate draw of every component, then verify actual draw against the front-panel voltmeter and the branch circuit breaker after installation. If you are over budget, split across two conditioners on separate circuits rather than exceeding the rating.

Why did my MR4300 shut everything off, and how do I reset it?
Two behaviors cause an unexpected shutdown, and both are the unit working as designed. AVM will disconnect all outlets if incoming voltage leaves the 100V–140V window, and the front-panel unsafe-voltage indicator lights to tell you so; Protect or Disconnect will cut AC during an extreme surge event. In both cases the MR4300 reconnects automatically once conditions return to normal — there is no fuse to replace and no manual reset sequence. If the unit is disconnecting repeatedly, the problem is upstream: check the utility voltage with the front-panel voltmeter, check for a shared circuit with a large motor load such as HVAC, and have an electrician verify the branch circuit and neutral. Repeated AVM trips are a diagnostic signal about the building, not a defect in the conditioner.

Can I monitor or reboot the MR4300 remotely?
No. The MR4300 has no network interface, no BlueBOLT support and no contact closure or control-system trigger input. All control is local, from the front-panel power button. For remote monitoring, scheduled power cycling or trigger-based control, specify a BlueBOLT-enabled Pro Series unit such as the M4315-PRO.

Can I use the MR4300 on a 20A circuit?
The MR4300 is a 15A device with a standard 15A plug on its captive cord, so it can be plugged into a 20A branch circuit but it will still only pass 15A to the load — the conditioner, not the breaker, becomes the limit. If the rack genuinely needs more than 15A, use a 20A-rated Panamax model with the appropriate cord and receptacle rather than trying to push this unit past its rating.

Does the MR4300 protect network and coax lines at full bandwidth?
The RJ-45 LAN protection is rated for 10/100/1000bT with a clamping level of 62V ±6V at 1 mA, and the coax protection is bidirectional across 0 MHz to 2.2 GHz with less than 0.5 dB insertion loss and HD 1080i capability. Gigabit Ethernet and standard cable/satellite feeds pass without issue; for multi-gigabit network runs, use dedicated network surge protection rated for that speed.

Related Products

• Panamax MR5100 — 11 outlets, 3 banks with delayed high-current turn-on, 2,025 joules
• Panamax MR4000 Power Management System — compact MR Series alternative
• Panamax M4315-PRO — BlueBOLT-controllable 1RU conditioner with 8 switched outlets
• Panamax power management equipment
• Power protection and management for AV racks