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Summary of Contents for ModWright Instruments LS 99
- Page 1 LS 99 Owner’s Manual Manufactured by ModWright Instruments, Inc. www.modwright.com...
- Page 2 ONLY use this input for signal from the front channels of a Home Theater Pre/Processor or other source WITH built in volume control. When the LS 99 is powered down, the HT/BP input defaults to HT/BP mode. When unit is powered up, any source connected to HT/BP input may be operated in HT/BP mode.
- Page 3 Only after this, should the power cord be connected to the external power supply. The LS 99 has two sets of fully balanced inputs, located on the back of the unit, labeled ‘BAL IN 1’ and ‘BAL IN 2’. The next two inputs are single ended RCA connections, labeled ‘III’...
- Page 4 in fully balanced mode with the ground toggle in the GND (1) position. In this setting, the preamp will operate with fully balanced XLR outs ONLY, but not RCA and XLR outs at the same time. The external power supply is fitted with an IEC input, for use with detachable power cords.
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Page 5: Operation
When shutting any system down, it is recommended to turn off the amplifier first and the preamplifier last. The LS 99 includes remote volume, mute and remote trigger output (12V DC), via the included custom MWI remote control unit. Volume is controlled by depressing the “VOL+’... - Page 6 The purpose of the HT/BP mode is to allow integration of 2CH audio into existing Home Theater systems utilizing preamp/processors with integral volume controls. When using the LS 99 in HT/BP mode, signal level is controlled by the preamp/processor before entering the HT/BP input of the LS 99 and routed straight to the main outs, connected to the front L/R channel amplifier(s).
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Page 7: Vacuum Tubes
Vacuum Tubes: The LS 99 uses two 6922 (6dj8 or 7308) signal tubes and one (5AR4 or equivalent) rectifier tube in the preamp. The tubes operate at moderately high temperatures. Care should be taken when replacing or removing tubes after being in recent use and after being disconnected from AC power. -
Page 8: Technical Specifications
Technical Specifications: Gain: 11dB. Frequency Response: 20Hz – 150Khz flat. Input Impedance: 50K. Output Impedance: 110 ohm. Noise Floor: -110dB (unweighted). Dimensions: Preamp = 10.5”W x 4.5”H x 12”D. (Depth includes 1.25” knobs and .75” RCA’s. Height does not include exposed tubes. Overall height varies by tube mfr). -
Page 9: Design Philosophy
Design Philosophy: The LS 99 was designed to offer World-Class Performance. It uses the best components and proprietary circuitry to offer a full, fast and accurate recreation of the entire frequency range. The bass is deep, tight and authoritative and at high frequencies sparkle. -
Page 10: Warranty
Warranty is non-transferable to second party. 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...
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