Subwoofer Reviews

Analog source: Linn Sondek LP12 turntable with Lingo power supply, Ittok tonearm, Spectral moving-coil cartridge.
FM Tuners: Day-Sequerra FM Reference Classic, Rotel RH-10, Fanfare FM-1, Magnum Dynalab MD-108/Model 205 Sleuth RF amplifier, Myryad T-100.
Digital source: Krell MD-1 CD transport, Adcom GDA-700 D/A processor.
Preamplification: Krell KBL, Mark Levinson ML-7A with L-2 phono section, Duntech MX-10 head amplifier.
Power amplifier: Mark Levinson No.334.
Loudspeakers: Snell Type A Reference system, Revel Ultima Salon, Dynaudio Contour 3.0, Quad ESL-63, B&W 805 Nautilus; Velodyne FSR-18 subwoofer.
Cables: Interconnects: 75 ohm Silver Starlight digital coax, Madrigal CZ Gel-1 balanced, Krell Cogelco Yellow balanced, Bryston Balanced, Mark Levinson HFC (with Camac connectors) single-ended, Randall Research single-ended. Speaker cables: Mark Levinson HFC-10, PSC Pristine.
Accessories: Arcici, Sumiko Franklin & Lowell stands.
Test gear: Heathkit Model SQ 5218 Sine/Squarewave Audio Generator.
Burn-in: FM source for 12 hours, followed by "Special Burn-in Noise Track" (Stereophile's Test CD 3) for 12 hours.
Speaker placements: 5' from rear wall, 3' from side walls, 8' feet apart, 8' from listening chair.
Listening positions: nearfield: 8' away or 16.5' away; ear level for both positions, 37" from the floor.—Larry Greenhill