Reduce the noise over AC power with the silver Audiolab DC Block Single-Outlet Inline Power Conditioner. It is designed to reduce the noise carried over your AC power and, when used with an amplifier, is rated for amps that output up to 300W total.

Designed to Reduce Noise from AC Power    100 to 240 VAC Power Support

One common issue with AC power is "DC over AC," a problem well known to affect the performance of audio equipment, especially amplifiers. In theory, the AC electricity we obtain from the sockets in our homes should be pure AC, with a perfectly symmetrical sine wave alternating between positive and negative phases. However, the presence of "asymmetrical loads" – myriad household devices that use the AC energy available in the power cycle unevenly, from dimmer switches to kitchen appliances to computer power supplies – causes the waveform to become offset, resulting in the presence of DC voltage on the AC supply.

The AC transformers commonly used in home audio equipment cannot tolerate the presence of significant levels of DC voltage without being compromised. Less than 500mV of DC – typical in an average household electricity supply – can be sufficient to cause toroidal transformers of the kind often found in amplifiers to become saturated, which adversely affects sonic performance and may cause audible mechanical vibration. By blocking, or cancelling, DC voltage found within the AC mains supply, the DC Block corrects the DC offset and rebalances the AC sine wave.

The DC Block also contains a high-performance audio filtering circuit that removes RFI/EMI contaminants from the power supply. This is effective in reducing both differential-mode noise (exacerbated by inexpensive switch-mode power supplies used by many home appliances) and common-mode noise (aggravated by airborne interference from phones, Wi-Fi networks, and Bluetooth).

This combination of technologies ensures that the DC Block does more than solve the problem of transformer saturation caused by DC over your AC line; it also helps to unlock the sonic potential of any audio component to which it is connected. The noise floor drops and the sound gains greater focus, with reduced grain, improved clarity, better-defined bass, and "airier" treble.

Using the DC Block is simple – plug its output into the IEC power socket of an audio / A/V component, then connect its input to an AC outlet. The device is designed for use with a single system component – Audiolab recommends that if one DC Block is used, it should be used with the integrated amp or power amp component within your system to obtain the greatest benefit from the DC-blocking technology.

Related Questions and Answers

Q: 1. What voltage is the Furman pl plus?

A: The output voltage of the Furman PL-PLUS DMC 90 to 139 VAC.

Q: 2. Can this be used with the Manfrotto 2951?

A: The Manfrotto Fabric Grid for Ezybox II Square Softbox (Medium), MFR # LL LS2951, is designed for use with the Manfrotto Ezybox II Square, Medium (23.75 x 23.75"), B&H # MAEZB2SM • MFR # LL LS2711P. It is not designed for direct usage with the Manfrotto 034 Single Extension for Autopole (Silver, 4.9').

Q: 3. What is the power voltage if the Furman pl plus

A: The operating voltage of the Furman PL-PLUS DMC Power Conditioner is 90 to 139 VAC.

Q: 4. Would a camera with an arca swiss plate slide in there?

A: No, the Movcam Riser Block for Sony A7II/A7RII/A7SII Cameras is designed specifically to work with Movcam baseplates, which do not use an Arca-Swiss base.

Q: 5. How does this compare with a regular camera mounted flash in terms of brightness?

A: Since the CNS-40B Constructor Large Block Bi-Color On-Camera LED Light is a continuous light it cannot be compared to a flash.

Q: 6. Hi, if the AC wall outlet voltage drops going into furman will the AC voltage coming out of the furman stay regulated at say 120VAC?

A: No - it will protect your connected equipment from dangerous voltage surges and drops by shutting down very quickly. It cannot regulate these voltage irregularities. It is a voltage suppressor.

Q: 7. Does 20A cover 15A ?

A: Yes, the PL-PRO DMC Power Conditioner can be used with 15A equipment.

Q: 8. Are there any difference between the Raiser Block #303-2202 and the #303-2402?

A: The MOV-303-2202 and the MOV-303-2402 are not interchangeable. The riser was made different for the correct focal height difference between the A7S and the A7II/A7RII/A7SII models.

Q: 9. What type of AC plug does the cord have? Thank you.

A: This has a 20 amp three prong plug for US systems.

Q: 10. Is the protection, and other benefits of the unit, on the convenience outlet, any different from the rear outlets in any way?

A: No, the rear and convenience outlets on the Furman PL-PLUS DMC Power Conditioner with Voltmeter/Ammeter features the same surge and voltage protection.