Lyra Etna MC phono cartridge Manufacturer's Comment
Editor: Thank you, Michael Fremer and Stereophile, for a careful and insightful review. Seldom do we get the chance to read a review which so accurately describes what we hear in our own systems. Well done!
There are only a few points which we will clarify here, none of which affects Michael's listening impressions: The Lyra Atlas and Etna share the same design philosophy, which is to have a completely solid and seamless connection between cantilever and headshell.
Lyra Etna MC phono cartridge Specifications
Description: Low-output moving-coil phono cartridge with yokeless dual-magnet system, a cantilever rod of diamond-coated boron, and a Lyra-designed, line-contact stylus with a major radius of 70µm, a minor radius of 3µm. Output voltage: 0.56mV at 5cm/s, zero to peak 45° modulation. Frequency range: 10Hz50kHz. Channel separation: >35dB at 1kHz. Compliance: 12cu. Recommended VTF: 1.681.78gm.
Lyra Etna MC phono cartridge Page 2
Other Etna specifications include a frequency range of 10Hz50kHz, channel separation of 35dB or better at 1kHz, and a medium compliance of 12cu at 100Hz. Lyra's recommended range of VTF is 1.681.78gm, with an optimum of 1.72gm. The recommended resistive load is between 104 and 887 ohms, and the recommended load via step-up transformer is 515 ohms.
Lyra Etna MC phono cartridge
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Stirling Broadcast BBC LS3/6 loudspeaker Measurements
Sidebar 3: Measurements
I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the Stirling Broadcast BBC LS3/6's frequency response in the farfield, and an Earthworks QTC-40 for the nearfield responses. (I measured S/N SB88019A.) The testing was primarily performed without the speaker's grille; I did repeat some of the farfield measurements with the grille in place.
Stirling Broadcast BBC LS3/6 loudspeaker Associated Equipment
Sidebar 2: Associated Equipment
Stirling Broadcast BBC LS3/6 loudspeaker Specifications
Sidebar 1: Specifications
Description: Three-way, reflex-loaded dynamic loudspeaker. Drive-units: 0.75" (19mm) polymer-dome supertweeter, 1" (27mm) fabric-dome tweeter, 8.6" (220mm) polymer-cone woofer. Crossover frequencies: 3kHz, 13kHz. Frequency response: 45Hz17kHz, ±3dB. Nominal impedance: 8 ohms. Sensitivity: 87dB/W/m.
Dimensions: 25" (630mm) H by 11.75" (300mm) W by 11.75" (300mm) D. Weight: 40.7 lbs (18.5kg).
Stirling Broadcast BBC LS3/6 loudspeaker Page 2
In my 19' by 12' room, the Stirlings sounded best when sited approximately 34" from their respective sidewalls and approximately 52" from the short wall behind them. (All dimensions are with respect to the center of the front baffle.) Aiming the enclosures more or less directly at the center of the listening area provided the best combination of good balance and spatial performance, although I found it easy to enjoy the Stirlings from off axis, as well.
Stirling Broadcast BBC LS3/6 loudspeaker
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