Adam F7 User Manual download pdf (Page 2)

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given) is 44 Hz–50 kHz, and it has two power amps, 60

W for the woofer ands 40 W for the tweeter. The crossover

frequency isn’t supplied by ADAM Audio for either speaker.

About that tweeter

Both models, the F5 and F7, share the same tweeter.

Behind the squarish waveguide with rounded edges sits

the item that makes all the difference according to

ADAM Audio—not the usual circular tweeter but a newly

designed version of ADAM Audio’s proprietary

Accelerating Ribbon Technology (ART). This is ADAM

Audio’s adaptation of a technology first developed by

physicist Oskar Heil, who found that a set of pleated rib-

bons could do a fine job as a high-frequency transducer.

He called it the Air Motion Transformer, AMT for short.

Rather than performing the push/pull in/out motion of a

conventional speaker element, the pleated ribbon assem-

bly with its folds acts more like the human voicebox.

ADAM Audio offers technical details and diagrams at

www.adam-audio.com/en/technology/x-art. If you wish

to see an animation of this type of membrane in action, go

to the website of a Swiss company that also continues in

Dr. Heil’s footsteps, found at www.precide.ch/eng/eheil/

eheildetails.htm.

Positioning

The unusual tweeter technology has no bearing on how

you should set up these boxes. They are nearfield monitors (a

term coined and trademarked by Ed Long about four

decades ago), and the usual guidelines apply: Set them up

in an equilateral triangle, meaning that the tweeter-to-tweeter

BY LORENZ RYCHNER

ADAM Audio

ADAM Audio is based in Berlin, Germany. The company makes loud-

speakers for a variety of markets, from home to installed audio to multime-

dia systems, and a number of its products are squarely aimed at the control

rooms of audio production facilities large and small. Over the last ten years

we have reviewed a number of these monitors, from the fairly pricey S-1A

to more affordable models like the A3X, ANF-10, A5, and A7.

Now comes a new pair of monitors, looking identical except for their

size, the self-powered F5 and F7. These models are to be released early

in 2013 and are aimed at the budget recordist while promising the spe-

cial sound of which ADAM is justly proud. An optional subwoofer (not

reviewed here) will also be released, the SubF, designed to enhance

both the F5 and F7 speakers.

The boxes

Here’s what the F5 and F7 have in common: Both are black, with a

broad porthole in front below the woofer that sits in the middle of the fas-

cia, below the tweeter that we’ll examine in a moment. Below the woofer

is the ADAM logo, next to an LED that lights green when a signal is pre-

sent, dim red when in power-saving standby mode, and bright red in a

rare case when overheating should occur (it would take insane output lev-

els that would fry your ears long before the speakers...). An auto-sensing

circuit activates the speakers within seconds from standby mode as soon

as a signal is applied.

On the back both models have an RCA input and an XLR/TRS combo

input (connecting the RCA mutes the combo), a volume knob ranging from

–∞ (silence) to +6 dB, a 3-position high-shelf eq toggle (flat or ±6 dB

above 5 kHz), a 3-position low-shelf eq toggle (flat or ±6 dB below 300

Hz), a 2-way toggle switch for flat or highpass at 80 Hz (for use with the

subwoofer), a voltage selector and power switch and a standard IEC 3-

prong AC socket. These boxes are not magnetically shielded.

Here’s how the F5 and F7 differ: The F5 weighs 15 lbs. and measures

11.5" x 7.5" x 9". Its woofer has a 5" diameter, its stated frequency response

(no deviation plot given) is 52 Hz–50 kHz, and it has two 25 W power

amplifiers. The F7 weighs 19.8 lbs. and measures 12.6" x 9" x 10.5". Its

woofer has a 7" diameter, its stated frequency response (no deviation plot

Excerpted from the January edition of RECORDING Magazine 2013

5408 Idylwild Trail, Boulder, CO 80301 Tel: (303) 516-9118 Fax: (303) 516-9119

For Subscription Information, call: 1-800-582-8326 or www.recordingmag.com

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