Sidebar 3: Specifications
LS5 preamplifier: Fully balanced, pure vacuum-tubed line-stage preamplifier. Tube complement: six 6922 dual triodes, six 12BH7 dual triodes. Frequency response: 1Hz–100kHz ±0.5dB (–3dB points below 0.1Hz and above 250kHz). Distortion: 0.01% at 2V RMS output (typically 0.005% in midband). Gain: 30dB/12dB switchable. Input impedance: 200k ohms balanced. Output impedance: 400 ohms balanced. Maximum input level: 20V. Controls: Gain, Input Selector, Power On/Off, 30dB/12dB Gain, Monitor/Source, Mute/Operate. Noise: 40;uV RMS residual IHF weighted balanced noise output with gain control at minimum, 12dB gain selected (94dB below 2V RMS output). Power requirements: 130W maximum.
Dimensions: 19" W by 5.25" H by 11.75" D (handles extend 1.5" forward of the front panel, rear chassis fittings extend 7/8"). Weight: 29 lbs shipping, 19 lbs net.
PriceL $4995 (1994); no longer available (2020). BL2 input controller: Solid-state single-ended to balanced converter. Frequency response: DC–500kHz (–3dB). Distortion: 0.01% at 2V RMS output (typically 0.002% at 1kHz). Gain: 6dB. Input impedance: 1.5M ohms. Output impedance: 60 ohms balanced. Output DC offset: 2mV. Output before clip: 18V RMS, 16V RMS into 600 ohm balanced load. Noise: 18;uV RMS balanced IHF weighted. Inputs: five unbalanced, two tape. Outputs: Main (balanced), Record 1, Record 2, (unbalanced). Power requirements: 15W maximum.
Dimensions: 19" W by 3.5" H by 11.75" D. Weight: 9 lbs net, 19 lbs shipping.
Price: $1495 (1994); no longer available (2020). Common to both: Warranty: 3 years limited (90 days on tubes). Approximate number of dealers: 65.
Manufacturer: Audio Research Corp., Minnetonka, MN 55343-4424 (1994); Audio Research Corporation, 6655 Wedgwood Road N., Suite 115, Maple Grove, MN 55311. Tel: (763) 577-9700. Fax: (763) 577-0323. Web: www.audioresearch.com (2020).
Dimensions: 19" W by 5.25" H by 11.75" D (handles extend 1.5" forward of the front panel, rear chassis fittings extend 7/8"). Weight: 29 lbs shipping, 19 lbs net.
PriceL $4995 (1994); no longer available (2020). BL2 input controller: Solid-state single-ended to balanced converter. Frequency response: DC–500kHz (–3dB). Distortion: 0.01% at 2V RMS output (typically 0.002% at 1kHz). Gain: 6dB. Input impedance: 1.5M ohms. Output impedance: 60 ohms balanced. Output DC offset: 2mV. Output before clip: 18V RMS, 16V RMS into 600 ohm balanced load. Noise: 18;uV RMS balanced IHF weighted. Inputs: five unbalanced, two tape. Outputs: Main (balanced), Record 1, Record 2, (unbalanced). Power requirements: 15W maximum.
Dimensions: 19" W by 3.5" H by 11.75" D. Weight: 9 lbs net, 19 lbs shipping.
Price: $1495 (1994); no longer available (2020). Common to both: Warranty: 3 years limited (90 days on tubes). Approximate number of dealers: 65.
Manufacturer: Audio Research Corp., Minnetonka, MN 55343-4424 (1994); Audio Research Corporation, 6655 Wedgwood Road N., Suite 115, Maple Grove, MN 55311. Tel: (763) 577-9700. Fax: (763) 577-0323. Web: www.audioresearch.com (2020).
