APC S15BLK Owner's Manual download pdf (Page 2)

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Not an issue with the Furman. The Unit’s display is a blue digital numeric

ammeter/volt meter that can be toggled to show the current input AC

voltage or the total system current draw in amps. The total system draw at

any given point while the Furman was installed in my system never

exceeded 5.3 amps. The AC voltage coming into the Furman from the wall

never exceeded 123 volts or dropped lower than 115 volts.

The first thing I did was to check the system for any signs of audible noise.

The SPR-20i emit’s a very low level hum when powered up (the level is the

same with or without components connected to it) which I believe is coming

from its power supply. It is only audible when placing your ear next to the

unit’s vents although it did become slightly higher when I powered the

amplifier up. In either case it should not be noticeable in most if not all

applications even in a quiet room.

The remainder of the system ran dead quiet.

I wanted to ensure there was no difference in the quality of the signal being

routed through the Furman from the cable TV feed from my wall to my high

definition DVR. The quality of the image showed no signs of degradation as

the Furman did its job in acting as a pass through. I listened to music in

both stereo and surround configurations and found the quality of the audio to

be every bit as detailed and dynamic as I am accustomed to hearing through

my system. The SPR-20i regulates voltage for a continuous output of 120

VAC (+/- 1.0V) with an input range of 113 VAC to 126 VAC. It will regulate

beyond these ranges but not within +/- 1.0V tolerance. I drove the system

to reference levels both with and without the subwoofer. I never heard any

indication that my amplifier was not getting enough current to maintain the

power that the system required. The same was true while listening to digital

movie soundtracks from standard DVD as well as both Blu-ray and HD DVD.

The multi-channel high resolution audio on Blu-ray and HD DVD discs can

often make heavy demands for power to handle dynamic transients. An

example of this would be the plane crash scene from the Blu-ray disc “Flight

of the Phoenix”. Even at higher sound pressure levels the power supplied to

the system through the Furman never wavered. Dynamics were rendered not

only with subtle delicacy but with tremendous convolution and room shaking

power during the scene that takes place within the passenger cabin as the

aircraft spirals out of control and crashes.

Furman recommends use of a 20 amp circuit with the SPR-20i. I have a

dedicated 20 amp circuit for my equipment but wanted to see how the unit

would perform when connected to a 15 amp circuit. I connect the unit to a

15 amp outlet and ran the system with no problem. I would say that if you

have 15 amp setup it would be best to try the unit in your environment to

ensure proper operation.

There were a few things that should be noted about the SPR-20i. The unit

offers no option for delayed power up of components plugged into it’s

outlets through the use of DC trigger(s). While most A/V system controllers

provide trigger assemblies it would be a nice option to have if needed. The

lack of a dimmer for the front panel display is a noticeable oversight. The

digital ammeter/voltmeter is very bright and is a definite distraction in a

darkened room. The owner’s manual makes reference to a dimmer however

the review unit I received lacked one and I saw no provision on the unit’s

rear panel to add one. These observations are minor and did not in any way

negatively impact my experience with the SPR-20i.

The SPR-20i is a well designed component that clearly sets the bar for

others to follow. Its power conditioning and voltage regulation are first rate.

Add that to its small stature, quiet operation and numerous connections and

the SPR-20i is a worthy contender for your power needs.

APC AV Model S15BLK Power Conditioner with Battery Backup:

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APC S15BLK Owner's Manual Page 2

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