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Bowers & Wilkins CM5 loudspeaker Measurements

Sidebar 3: Measurements

I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the Bowers & Wilkins CM5's frequency response in the farfield, and an Earthworks QTC-40 for the nearfield and spatially averaged room responses.

My estimate of the CM5's voltage sensitivity was 87.5dB(B)/2.83V/m, which is within experimental error of the specified 88dB. The CM5 is specified as having a nominal impedance of 8 ohms with a minimum value of 3.7 ohms; fig.1 confirms the specification, and reveals that the minimum impedance occurs at the top of the audioband, where…

The Entry Level #24

There are two things that don't have to mean anything; one is music and the other is laughter.—Immanuel Kant

We can dance until we die.—Katy Perry

I'd always figured I'd wind up with a girl who loved the Mets, hated cats, and had grown up on Sonic Youth and the Pixies—a female version of me, more or less. What could be better?

Was my vision misguided? Maybe. Narcissistic? Probably. A symptom of low self-esteem?

Hmm . . .

But over the last few hours I've grown smarter, less self-centered, more forgiving of myself and others. I've made an important discovery…

The Entry Level #24 Page 2

Once home, I unwrap my new possession, place the record on the VPI Traveler, and anxiously, expectantly, sit down to listen.

More beeps, bangs, and drones—gah!—almost as terrifying as the crap coming from Ms. Little's apartment. Ten seconds in, I'm scolding myself: Why did I buy this? (footnote 1) I get up, pull the record from the platter, return it to its sleeve, place the album on a stack of countless others like it, and soon forget it ever existed.

Where did I put that Drake record?

Ms. Little snapped me out of my reverie. "And what do you mean by 'Hmm'?"

"…

The Entry Level #24 Contacts

Sidebar: Contacts

Epoz, PO Box 258, Belrose, NSW 2085, Sidney, Australia. Tel: (61) 2-9450-0789. Fax: (61) 2-9475-4255 Web: www.epoz.com.au
US distributor: Music Hall, 108 Station Road, Great Neck, NY 11023. Tel: (516) 487-3663. Web: www.musichallaudio.com

Followup: The British Invasion Visits NYC at In Living Stereo

This past Wednesday (12/5/2012) at New York City’s In Living Stereo, a diverse crowd of music lovers and audiophiles congregated on the listening room’s floor for a chance to hear a few choice sides from the new Beatles LP remasters. Attendees overflowed from the listening room into the lobby where they waited in anticipation to sit on that floor and get a listen to the new LPs.

Upon my arrival, the presentation was already half-way through. The looping sample at the end of “A Day in the Life” rotated around turntable taunting me as I waited behind clusters of folks to get a seat: “never…

Anthem Statement M1 monoblock power amplifier

When I first saw Anthem Statement's M1 at the 2011 CEDIA Expo, it was a bolt from the blue. Happening on this flat, black slab of an amplifier lying on a display table or bolted to a wall, reminded me of the appearance of the iconic monolith in Stanley Kubrick and Arthur C. Clarke's 2001: A Space Odyssey. The M1's dimensional ratios are not 12:22:32, and there are many other one-rack-unit amps—yet, like the monolith on the moon, the M1 was in such striking contrast to everything else in its environment that it demanded attention and reflection.

I soon learned that the M1 is a 1000W or…

Anthem Statement M1 monoblock power amplifier Page 2

Then, to reacquaint myself with the sound of my reference system in my room, I spent some time listening to my B&W 800 Diamond speakers and my other amps. Only after that did I put the M1s back to work. As when test driving a powerful sports car, my first impulse was to see what the M1s' power could do. I wasn't disappointed—as much as I tried , within and sometimes beyond the limits of propriety, the M1s drove the 800 Diamonds to clean and undistorted output. Whether it was the conclusion of Mahler's Symphony 2, with orchestra, chorus, and organ all at full tilt, or the conclusion of…

Anthem Statement M1 monoblock power amplifier Specifications

Sidebar 1: Specifications

Description: Monoblock power amplifier with class-D output stage. Line-level inputs: 1 single-ended (RCA), 1 balanced (XLR). Outputs: 1 pair multiway binding posts. Selectable power switching (external trigger, manual, signal-sensing); 5-24V signal input and output for external power control. Maximum continuous power (20Hz–20kHz, 0.1% THD+N): 1000W into 8 ohms, 2000W into 4 ohms, 2400W into 3 ohms, >2000W into 2 ohms (depending on line-voltage regulation). Input sensitivity: 3.2V for 1000W (8 ohms). Voltage gain: 29dB. Input impedance: 10k ohms (RCA), 20k…

Anthem Statement M1 monoblock power amplifier Associated Equipment

Sidebar 2: Associated Equipment

Digital Sources: Sony XA-5400ES SACD/CD player, Oppo BDP-95 universal Blu-ray player.
Preamplification: Meridian HD621 HDMI audio processor & 861 Reference v6 digital surround controller.
Power Amplifiers: Bel Canto Design e.One REF1000 monoblocks, McIntosh MC303, Parasound Halo A 31.
Loudspeakers: ADAM Audio Classic Column MK3, Bowers & Wilkins 800 Diamond.
Cables: Digital: Black Cat Veloce. Interconnect: van den Hul Flat 180 HDMI, AudioQuest Vodka HDMI & Cheetah/DBS balanced. Speaker: AudioQuest Mont Blanc/DBS biwire. AC: JPS…

Anthem Statement M1 monoblock power amplifier Measurements

Sidebar 3: Measurements

I used Stereophile's loan sample of the top-of-the-line Audio Precision SYS2722 system (see www.ap.com and the January 2008 "As We See It") to measure the Anthem Statement M1. Because Kalman Rubinson felt that the two sets of amplifiers he auditioned sounded different from each other, I measured one sample from the first set, serial no.147923, and one from the later set, no.148279. Unless stated otherwise, all measured data refer to this later sample.

I preconditioned each monoblock by running it at one-third its rated power into 8 ohms for 60 minutes.…