Quest z

Ascent to Mastery

Daring in both form and function, the Quest z delivers everything from the most delicate detail to the most inspired crescendo.

Truth can be revealed only through uncompromised commitment to the higest concepts. The Quest z recreates musical truth through proprietary Electrostatic Loudspeaker Technology available only from MartinLogan. Daring in both form and function, the Quest z delivers everything from the most delicate detail to the most inspired crescendo.

Launched in 1993

Price when discontinued:



Specifications are subject to change without notice

Frequency Response

28–22,000 Hz ±3dB

Recommended Amplifier Power

20‒400 watts per channel

Horizontal Dispersion


Vertical Dispersion

48" (121.92cm) line source


90 dB/2.83 volts/meter


Nominal: 4 Ohms
Minimum: 1.5 Ohms. Compatible with 4, 6, or 8 Ohm rated amplifiers.

Crossover Frequency

150 Hz at 12dB per octave

High Frequency Transducer

48" (121.92cm) CLS™ electrostatic transducer

Low Frequency Transducer

12" (30.5cm)


Custom wound audio transformers polypropylene capacitors, air core coils

Audio Controls

Bass Contour Switch: -5dB from 60–150 Hz
Presence Contour Switch: +2dB from 1,000–5,000 Hz


5-way bi-wire binding posts


115 lbs. (52.2 kg)


72.75" × 19" × 13"
(184.8cm × 48.3cm × 33cm)

Customer Reviews For Quest z

Please, Sign in or Sign up to add comments.


  • Tuesday, February 21, 2017

Aged with wine
Bought these in 1996...they were quickly absorbed into the family entertainment center digitally with surround went off to college enabling me to reclaim my entire sound room...replaced the screens in 2016 and updated my system front end with now stereo only...had considered new happy I opted to keep these...I now have what I dreamed about while in college...with resurgance in vinyl along with these, I am in a very good place...

Larry Hoffman

  • Friday, March 23, 2012

Better Late Than Never
I purchased these speakers in January 2012 and have finally gotten them fully functional in March 2012. Dana Brown at Martin Logan was quite helpful in fixing the crossovers to work properly and giving excellent guidance on bringing these fine speakers back to their original specs. Now, they truly outperform the Eminent Technologies, Magnepans, Emerald Physics and dozens of other speakers I have owned. If I ever find another set of these locally, I will snatch them up in a heartbeat. The sound stage and fidelity is truly astounding. The bottom end does not require a subwoofer, although others may disagree. Subs are not a part of a true audiophile's 2-channel system.