1 ls 100 tube preamplifier owner’s manual manufactured by modwright instruments, inc. 21919 399th st., amboy, wa 98601 usa www.Modwright.Com.
2 cautions: when removing the lid screws only remove the screws on the side panels and the screws on the top panel at the front and rear edge. The screws in the middle of the top cover are attached to nuts below and do not secure the lid in place. If these are removed, lock nuts could fall inside th...
3 setup: it is always recommended to remove all tubes before shipping the unit. Be sure that the ls 100 is not connected to ac power and that power plug is disconnected from unit and wall outlet. Use supplied 5/64” hex driver to remove lid screws on sides and along front and rear edges of top panel ...
4 introduction: thank you for purchasing a modwright instruments product. This unit is designed to offer high performance and exceptional reliability. The ls 100 preamplifier offers high bandwidth, low distortion, and exceptional musicality. We have designed this preamp to allow the reproduction of ...
5 operation: controls are labeled on front of preamp from left to right: balance, cd, dvd, video, ht/tp (home theater bypass), aux. 1, aux. 2, mon. (monitor input select), opt. And mute. Left rotary knob is balance control (when balance function selected). Right rotary knob is volume control. Power ...
6 ht/bp input is meant for integrating 2ch into a multi-channel or home theater system. When used in this mode, home theater preamp or processor is connected to ht/bp inputs and signal is output straight to 2ch main stereo outs. This allows direct connection to front l/r channel amp(s) with no sonic...
7 technical specifications: tube complement: (2) 6sn7 signal tubes, (1) 5ar4/gz34 rectifier tube. Gain: ~12db. Input impedance: 38kohm. Output impedance: 300ohm. Frequency response: 20hz – 100khz (-1db) weight: 29 lbs. (34 lb. Packed) dimensions: 17”w x 17”d x 5-1/2”h. Basic specifications: (1) pair...
8 optional phono upgrade: if the phono board is already installed in your ls 100 when you receive it, then you only need install the tubes. Per diagram below, install 12au7/ecc82 and 12ax7/ecc83. Turntable ground lead should be connected to brass grounding nut on back of ls 100. Phono input leads fr...
9 upgrade installation: if you are installing the phono upgrade in an existing unit, first remove the two screws and nuts that hold the opt. Plate to the back of the enclosure. Install the brass ground screw in the top hole, by inserting the screw from the inside of the chassis, out. There should be...
10 warranty: modwright agrees to warranty product for a period of 5 years from the date of purchase from a factory authorized modwright instruments dealer. Warranty covers parts and labor for repairs due to equipment failure not related to customer abuse and/or neglect. Customer is responsible for s...
11 contact information: if you have any questions about modwright instruments products or modwright modifications or products, please do not hesitate to contact us via phone, e-mail or conventional mail. Ph: 360 -247-6688 email: modwright@yahoo.Com address: modwright instruments, inc. 21919 ne 399 t...
12.
