Each cover will have its own unique walnut grain, no two will look alike.  They are approximately 5/8" thick on the top and sides.  No screws, they fit snug to fit over the metal case already on the unit.   This also allows easy access for service when necessary.

In the near future we will also have covers for additional Marantz units.

Please note these are NOT cases, they are snug fitting covers that fit right onto the unit.

++++++++++++++++++++++++++++++++++++

++++++++++++++++++++++++++++++++++++

Siefert Research Maxim III-H  (1985) H=hybrid

The Maxim III-H (hybrid) is best described as the last and best configuration (as designed by *Dan Siefert) of a two-way, compact system featuring 40-Hz resonance woofers, low IM distortion, low group delay and with high power handling capability.

The enclosures:
Essentially a 2-way system, these front-ported, black-lacquered grained oak, tuned-bass reflex enclosures (with radius edges) are based on the special relationship 4:5:6, which minimizes internal nodal reflections. Remarkably solid, 3/4" particle wood and high density fiberboard, plus rigid internal bracing. The narrow baffles provide excellent dispersion and enhanced imaging. They have sequential serial numbers for a matched pair.

The drivers:
Specially designed Dynaudio 6.5" woofers (18 oz ferrite magnets, 1.25" voice coils) feature ultra-compliant butyl surrounds combined with polypropylene cones containing proprietary inert damping compound that makes them twice as thick as most woofer cones.The SEAS tweeters (8.7 oz ferrite magnets) are 1" special aluminum domes with polyamide surrounds, this upgraded tweeter design makes them hybrid, or, the "H" model. (see Dan's technical explanation below)

The crossover network:
3.3 kHz, conjugate-compensated, first order, minimum phaseFrequency response: 46 Hz ~ 22kHz...8 ohms...power handling up to 250 watts...sensitivity 86 dB @ 1 watt...size (ea) 13" H x 9" W x 11 "D...18 lbs (ea)Finally, the Maxim III-H (Hybrid) is true high quality system, 100% made in USA. They easily rival the quality of famous German/American speakers like Visonik, Braun, ADS, B&W, etc. 

The story:
Several years ago, we came across a pair of unknown (at the time) Siefert Research speakers. We were intrigued enough with the design and sound to jump online and (eventually) track down the designer, Dan Siefert. *(see bio below). He was kind enough to reply with a wealth of inside information way beyond what was available online. He recommended looking for a pair of Maxim III. He also sent us a package with original spec sheets, sales sheets and technical design information about the Maxim lineup.

Then, in December 2018, after finally finding a mint pair of Maxim III(H), we contacted him again in regards to what the "H" meant on these Maxim III(H) speakers.
Dan's reply:12/27/18"
"With the Maxim III-H you have what I consider the best series of Maxims. The "H" stands for hybrid. Looking at the tweeter you will notice that the dome is aluminum but the surround (outer edge) is not.  99.9% of all dome tweeters are a single piece construction. So, if you have an aluminum dome (high stiffness), the surround would also be aluminum. Aluminum makes a great diaphragm but a lousy surround (where you want high compliance, not high stiffness."

In the '80's there were almost no hybrid construction tweeters. Today they are somewhat more common.

Bottom line:
The hybrid tweeter combined the high stiffness of an aluminum dome with the high compliance of a polyamide surround! Making a very good speaker even better.

Stereophile magazine review 1985:
"There are very few loudspeaker systems of any price that don't make a critical listener accurately unhappy when he or she returns from a live concert to put on a recording. The Maxim is, amazingly, one that doesn't. In fact, of all the speakers in this price class that I have heard. I would say that Siefert's Maxim III is probably the most successful design of all. Mated with a suitable power amplifier, and not pushed too high a listening level, it is one of a small handful of moderately priced speaker systems that can make most audiophiles (and practically all music lovers) quite happy for an indefinite period of time. Recommended."
~J. Gordon Holt (Stereophile magazine July 1985)

Read more at https://www.stereophile.com/.../siefert-maxim-iii...

About Siefert Research...
Dan Siefert began his engineering career in 1975 at Great American Sound Company, designing high-end solid-state audio pre-amplifiers and power amplifiers.  In 1983, Dan founded Siefert Research in Los Angeles, designing, manufacturing and marketing high performance loudspeakers...not through dealers but direct to customer.  In 1986, he joined Harman International Industries, Inc . as a Senior Systems Design Engineer.  While at Harman, Dan brought several speakers to market for professional, consumer and computer/multi-media applications. He was assigned to the Research and Development department, reporting to Dr. Floyd Toole.   Dan then focused his attention on measurement technologies and contributed to the development of Harman's advanced subjective and objective measurement techniques.

In 1996, he founded One on One Technical Products, Inc. and, as of 2018, is the CEO, providing engineering services to the Consumer Electronics Industry. He is a member of the Audio Engineering Society (AES), the Acoustical Society of America (ASA) and the Custom Electronics Design and Installation Association (CEDIA). Dan is also a certified THX Home Theater Products developer.

++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++