SERIES II 15 AMP Power ConditionerS

voltage rating will be compromised. The unit must be returned to Furman Sound, or an authorized Furman Service center for repair.

NOTE: If the mains power is above the high cutoff voltage and has caused the unit to remove power from its outlets, it cannot restore power without the operator manually turning the unit off, then on again. Avoid turning the unit back on, without first checking the source of the problem, and perhaps changing the AC source.

TROUBL E SHOOTING GUIDE

1.) Symptom: No power to the AC outlets.

Possible Cause: Circuit breaker has tripped due to excessive load.

Action Needed: Remove one piece of equipment from the Series II unit, and push the square re-set tab into the Circuit breaker bezel.

2.) Symptom: No power to the AC outlets, “Protection OK” indicator is not lit.

Possible Cause: Either the AC outlet to which your Series II device is connected has no AC voltage present, or the unit has been subjected to a sustained voltage in excess of 400 Volts.

Action Needed: Plug the Series II unit into an AC receptacle where AC voltage is present. If the problem persists, the protection circuit may be damaged, and require factory service.

3.) Symptom: Extreme Voltage indicator lit.

Possible Cause: Input voltage is above 135- 140

volts (260 – 265 volts E version, 120

-125 volts J version), causing power to the unit’s outlets to be shut down. Additionally, if the voltage is below 85 - 90 volts at turn on, the unit will not allow AC voltage to reach the outlets.

Action Needed: Correct the line voltage, then turn the unit on. Consider installing a Furman voltage regulator.

DEFINITIONS

SPIKE: This is a pulse of energy on the power line. Spikes can have voltages as high as 6000 volts. Though they are usually of very short duration, the energy they contain can be considerable, enough to damage sensitive solid-state components in audio and computer equipment. Spikes can also foul switch contacts and degrade wiring insulation. They are an unavoidable component of electric power. They are caused unpredictably by electric motors switching on or off (on the premises or outside), utility company maintenance operations, lightning strikes and other factors. Spikes (also called surges or transients) are absorbed by special components in the PL-8 and PL-PLUS to provide safe voltage levels to protect your equipment.

RFI/EMI INTERFERENCE: Noise from RFI (Radio Frequency Interference) or EMI (Electro Magnetic Interference) involves lower voltages and less energy than is found in spikes, but it is continuous rather than transient in nature.

It is not likely to cause damage, but it can certainly be annoying, producing static in audio circuits, “snow” on video screens, or garbled data in computers. Noise can be introduced

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Furman Sound PL-8 II, PM-8 II, PL-PLUS D II, PL-PLUS II manual Troubl E Shooting Guide, Definitions
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PL-PLUS II, PL-PLUS D II, PM-8 II, PL-8 II specifications

Furman Sound is a renowned brand in the audio equipment industry, known for producing high-quality power management solutions essential for sound reinforcement and protection of sensitive electronic gear. Among their popular products are the PL-8 II, PM-8 II, PL-PLUS D II, and PL-PLUS II power conditioners, each offering unique features and technologies that cater to the diverse needs of audio professionals.

The Furman PL-8 II is a rack-mountable power conditioner designed to provide AC power filtering and protection. It features eight outlets, including one that allows for the connection of another device or daisy-chaining more equipment. One of its standout features is the Linear Filtering Technology (LFT), which significantly reduces noise that could adversely affect audio performance. Additionally, the PL-8 II has a built-in voltmeter and ammeter that provide real-time voltage and current readings, ensuring users are aware of their power consumption and equipment status.

The PM-8 II is another excellent choice for those requiring reliable power management. This model also includes several outlets and incorporates advanced surge protection to safeguard valuable equipment from harmful voltage spikes. It utilizes Furman’s proprietary technology to ensure that connected devices receive clean and consistent power, which is crucial for maintaining audio fidelity. The PM-8 II's sturdy metal chassis guarantees durability, making it suitable for both studio and live settings.

Moving on to the PL-PLUS D II, this versatile power conditioner goes beyond basic power management by offering digital readouts for voltage and amperage. This feature allows audio engineers to monitor power conditions more closely. Like its counterparts, the PL-PLUS D II employs LFT to improve audio quality by minimizing electromagnetic interference (EMI) and radio frequency interference (RFI). It also includes a retractable LED light, which is a practical addition for users working in low-light environments.

The PL-PLUS II takes power management to the next level, featuring a robust set of capabilities designed for the most discerning professionals. This model incorporates both LFT and automatic voltage regulation (AVR), ensuring stable power even in fluctuating conditions. The PL-PLUS II also comes equipped with an advanced surge protection system that includes an LED indicator, allowing users to see when the device is actively protecting against surges. Its durable construction and thoughtful design make it a top choice for anyone serious about their audio setup.

In conclusion, the Furman Sound PL-8 II, PM-8 II, PL-PLUS D II, and PL-PLUS II all offer advanced features and technologies that enhance audio performance and equipment safety. Whether for live sound applications or studio use, these power conditioners are essential tools for ensuring clean and reliable power delivery, enabling audio professionals to focus on what they do best.
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