Descriptions of Controls, Front Panel

SP-20AB MANUAL

	5							4	5	6
4		6					3	4		6	7
						OFF
			L		R	OFF
3		7	L		R	O N	2				8
2		8	OVERLOAD			O N	2				8
2		8	OVERLOAD				1				9
							1				9
0		10			20 WATTS / CHANNEL			0		10	P W R
1		9		SIGNAL				0		10
	INPUT LEVEL				STEREO AMPLIFIER	SPEAKERS		VOLUME			HEAD
	INPUT LEVEL				MODEL SP-20A	SPEAKERS		VOLUME			PHONE

Descriptions of Controls

Front Panel

INPUT LEVEL: The Input Level control can be adjusted for maximum signal to noise and minimum clipping. The Input Level control is stereo - it affects both left and right channels simultaneously and affects all outputs.

SIGNAL PRESENT LIGHTS: These yellow LED’s turn on whenever a signal exceeding 125 millivolts RMS (40 dB below full power) is present at the SP-20AB’s input jack. They will increase in brightness as the signal strength increases. This feature is very useful as a clue to where the fault may lie if the expected program is not heard at the outputs.

OVERLOAD LIGHTS: These LED’s glow red to indicate an overload in the SP-20AB. If the LED lights up, either the drive level to the unit should be reduced, or the setting of the Input Level control should be reduced until the LED remains off. The lights turn on when the signal level at either output is within 2 to 3dB of clipping. Once triggered, the lights will stay lit for a minimum of 50 milliseconds so they can be easily seen, even if the actual duration of the overload is much shorter.

HEADPHONE JACK / HEADPHONE VOLUME: Any type of headphones wired with a standard 1/4” stereo phone plug may be used successfully. Note that the headphone

volume may be adjusted without affecting the speaker level or the level of any other headphones connected through HR-2 Remote Stations.

SPEAKERS BUTTON: Depressing this button turns on the speakers connected to the SPEAKER banana jacks on the rear panel. This provides an easy way to mute the sound without changing the volume setting.

POWER LIGHT: Glows red when unit is receiving power and the ON-OFF SWITCH is in the ON position.

Rear Panel

ON-OFF SWITCH: This switch turns the SP- 20AB on and off. For convenience, it is recommended that the SP-20AB and any other rack-mount equipment be powered through a switchable outlet box, such as the Furman Sound PL-8 or PL-PLUS Power Conditioner and Light Module. The PL-8 provides an easy way to power up the whole rack with one front-panel switch, and provides discreet illumination on dark stages and studios as well. If you do use a switcha- ble outlet box, leave the SP-20AB’s on-off switch in the ON position at all times.

GROUND LIFT SWITCH: In many installations, hum-causing ground loops are formed by the common connection of various pieces of equipment to the power line ground, and by

SP-20ABE, SP-20AB specifications

Furman Sound is a name synonymous with high-quality power management solutions for professional audio, video, and broadcast systems. Among their impressive lineup, the SP-20AB and SP-20ABE power conditioners stand out as essential tools for those who demand reliability and performance in their setups.

The SP-20AB and SP-20ABE are designed to safeguard audio equipment from power surges, electrical noise, and other fluctuations that can jeopardize the integrity of a performance. One of the main features of these power conditioners is the Advanced Power Factor Correction technology. This innovation enhances the efficiency of connected equipment, ensuring optimal operation even in electrically noisy environments.

Both models come equipped with a robust circuit breaker, providing added protection against overloads. The front-panel displays include LED indicators that keep users informed about the power status and any potential issues, ensuring peace of mind during critical operations.

A significant characteristic of the SP-20ABE is its built-in Ethernet connectivity, which allows for remote management and monitoring capabilities. This feature is invaluable for sound engineers and technicians who need to manage multiple devices from a single interface. Such connectivity enhances efficiency and simplifies troubleshooting in larger setups.

The SP-20AB and SP-20ABE also incorporate Furman's proprietary Series Multi-Stage Protection. This multi-layered defense system gives users the assurance that their equipment is secured from damaging transients. The design also includes extensive filtering that minimizes electromagnetic interference (EMI) and radio frequency interference (RFI), ensuring cleaner audio signals and enhanced sound quality.

Both models feature a rugged, roadworthy chassis built to withstand the rigors of touring and on-site performances. This durability means they’re not only suitable for studio environments but also perfect for live applications where reliable power conditioning is crucial.

In summary, the Furman Sound SP-20AB and SP-20ABE power conditioners are vital assets in any audio professional's toolkit. With advanced technologies focused on efficiency, protection, and monitoring, they provide a blend of performance and reliability that ensures your audio gear operates optimally in any setting. Whether in the studio or on the road, these power conditioners represent a wise investment for safeguarding your audio investments.

Furman Sound SP-20ABE manual Descriptions of Controls, Front Panel

Models: SP-20ABE SP-20AB