Here are just a few:
Australian sound artist, Room40 curator, and all-around sweet dude, Lawrence English, has recorded For/Not for John Cage as “an homage to the aspects of his life and work that have inspired me over the past two decades (ironically, those in which he has been physically absent, but…
Polk Audio is such a company. During my years at Stereophile I've covered their RT25i (September 2001), which I bought and still own; the LSi7 (March 2003); and the RTiA1 (September 2008). Each model, when reviewed, exemplified great value and competed well with all other designs at…
Description: Three-way, bass-reflex bookshelf loudspeaker. Drive-units: 1" (25mm) ring-radiator tweeter, 3.25" (83mm) polypropylene-cone midrange, 6.5" (165mm) polypropylene-cone woofer. Crossover frequency (midrange–tweeter): 2.8kHz. Frequency range: 36Hz–40kHz. Frequency response: 50Hz–30kHz, –3dB. Nominal impedance: compatible with 8 ohm outputs. Sensitivity: 88dB. Recommended amplification: 20–200Wpc.
Dimensions: 16¾" (426mm) H by 8" (203mm) W by 14½" (370mm) D. Weight: 29.6 lbs (13.4kg).
Finishes: Mount Vernon Cherry, Midnight Mahogany.
Serial…
Analog Sources: VPI TNT IV, Rega Research Planar 3 turntables; Immedia, Syrinx PU-3 tonearms; Koetsu Urushi, Clearaudio Virtuoso Wood cartridges.
Digital Sources: Lector CDP-7T, Creek Destiny CD players.
Preamplification: Vendetta Research SCP-2D, Creek Destiny phono stages; Audio Valve Eclipse line stage.
Power Amplifier: Audio Research Reference 110.
Integrated Amplifier: Creek Destiny.
Loudspeakers: Dynaudio Excite X12, Epos M16i, Monitor Audio RX6 Silver.
Cables: Interconnect (all MIT): Magnum M3, MI-350 CVTwin Terminator, MI-…
I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the Polk LSiM703's frequency response in the farfield, and an Earthworks QTC-40 for the nearfield and spatially averaged room responses. With its ¼" capsule, the Earthworks mike is small enough to not significantly affect the tuning of the port when used to take a nearfield measurement.
I estimated the LSiM703's B-weighted voltage sensitivity as 87dB/2.83V/m, 1dB lower than the specification. The electrical impedance (fig.1, solid trace) remained between 4 and 7 ohms over most of…
Description: Three-way, reflex-loaded, floorstanding loudspeaker. Drive-units: 1" ceramic-diaphragm tweeter, 6" ceramic-diaphragm midrange unit, three 8" aluminum-cone woofers. Crossover: second-order, 250Hz & 3kHz. Frequency response: 26Hz–30kHz, ±3dB. Sensitivity: 89dB/2.83V/m. Impedance: 6 ohms nominal, 4 ohms minimum. Power rating: 250W. Terminals: single-wired, WBT. Internal wiring: Jorma Design. Supplied accessories: anodized aluminum outriggers with Marten cones.
Dimensions: 49.2" (1250mm) H by 10.6" (270mm) W by 19.7" (500mm) D. Weight: 104 lbs (…
Analog Sources: Clearaudio Concept turntable & tonearm, with Concept moving-magnet cartridge; Clearaudio Ovation turntable & tonearm, Clearaudio Talisman V2 cartridge.
Digital Sources: Benchmark DAC1 HDR D/A converter/preamplifier, Sony Vaio laptop computer; Bel Canto Design CD 2 CD player & DAC 3.5 VB Mk.II D/A converter & VB-1 power supply.
Preamplification: Clearaudio Nano phono preamplifier.
Power Amplifiers: Audio Research Reference 150, Rogue Audio M-180 monoblocks, Simaudio Moon Evolution 880M monoblocks.
Loudspeakers…
I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the Marten Django XL's frequency response in the farfield, and an Earthworks QTC-40 mike for the nearfield responses. Because the Django XL is a large, heavy speaker, I could not raise it very high off the ground for the acoustic measurements. As a result, the measured responses have less resolution in the midrange than I would have liked.
My estimate of the Django's voltage sensitivity was 84.1dB(B)/2.83V/m, which is much lower than the specified 89dB/2.83V/m. Offsetting that,…