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Presenting the new LS 99 fully balanced tube preamp, featuring compact form factor, tube

rectification and external power supply.

June 19, 2023 – ModWright Instruments Inc., manufacturer of the award-winning KWA 150SE

amplifier, PH 9.0/X/T tube phono stage and LS 300 Reference balanced tube preamp, is introducing their new LS 99 fully balanced tube preamp with external supply. Like the best-selling PH 9.0 tube phono stage, the form factor, aesthetic, and price-point, focus on a compact enclosure and engineering to offer exceptional performance at an attractive price point.

The LS 99 preamp is tube rectified (5AR4/GZ34 and equivalents) and uses 6922/7308/6dj8 driver tubes. The design is fully balanced in and out, with RCA and XLR inputs and outputs. It features (2) 12V trigger outputs to allow for whole system integration, specifically with the KWA 99 mono blocks. The LS 99 is based on the LS 300 Reference balanced preamp design, but in a smaller enclosure and not fully dual mono.


(3) pair RCA inputs.

(2) pair XLR fully balanced inputs.

(1) RCA Home Theater Bypass input (HT/BP).

(2) pair RCA outputs.

(2) pair XLR fully balanced outputs.

(2) 12V remote trigger outs.

Phase toggle switch on front.

Remote volume, mute and 12V trigger.


Input Impedance: 30K

Output Impedance: 100 ohm.

Gain: 11dB

Noise: -110dB

Frequency Response: 20Hz – 150Khz.

Dimensions: 10”W x 4”H x 10”D

Weight: 29 lbs – 33 shipped.

The new LS 99 balanced tube preamp will be on active display at Pacific Audio Fest 2023 in SeaTac, WA, Suite #1351 and Suite #2203, June 23rd, 24th and 25th.

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ModWright Instruments, Inc. is based in Amboy, Washington, and was founded in 2000 by Daniel

Wright. The LS 99 balanced tube preamp continues a tradition of designing high value, high

performance audio equipment, proudly Hand Crafted in the U.S.A. For more information, visit their website at

If you would like more information about this topic, please contact:

Daniel Wright, CEO

Tel: +1.360.247.6688

Kristin Vittitoe, Vice President

Tel: +1.360.247.6688



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