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The Passive Super Bass Enclosures





         Conceived and shaped from Chinese “Qin Dynasty” concept, the paired Ultrumax-Sub-IIph deep bass enclosures are not only the conventional passive-mode subwoofers but also can be used as a part of the main/left or main/right, full-spectrum floor-standing speakers for deep bass playback and to support Ultrumax high C/P value U-series speakers, including: 

Ultrumax-U1p、 Ultrumax-U2p、Ultrumax-U2p-ST

on each enclosure’s top in a same time. The application of Ultrumax-Sub-IIph is suitable for medium and large audition rooms.    

ultrumax-sub2-ph-11m.jpg    ultrumax-sub2-ph-3m.jpg


         Most of audiophiles must have his own carefully selected, personal favorite, and/or good quality/high priced amplifier(s) that they would like to keep when upgrading his speaker system. To meet the wishes of reserve existing equipment, to minimize investment cost, and to get an optimal result for best sound quality; there are some good reasons for M&D to develop his passive products for Ultrumax series therefore.


         Ultrumax-Sub-IIph’s basic structure is identical with the Ultrumax-Sub-IIa enclosure except designed as a passive-mode deep bass speaker which can even improve for a deeper bass response over the active-mode enclosure. And for system optimization, the matched Ultrumax-U1p/U2p/U2p-ST passive speaker’s crossover point has been raised from 200Hz up to 350Hz; to further optimize for a more balanced system performance and SPL output capability. The speaker terminal on the backside of enclosure has two sets of banana sockets, the lower LF +/- set is used to connect with power amplifier through a speaker cable, and the higher HF +/- set is to connect with Ultrumax-U1p, -U2p, or -U2-ST speakers through speaker cable.


         One HX-8.0-0.6 woofer driver weighting up to 2.3Kg and with the large Ø120x35mm magnets to yield a ±7.5mm (0.6”) high Xmax linear excursion capability is carefully selected for the Ultrumax-Sub-IIph. This woofer has been mounted on the enclosure front panel which can carry down to 33Hz (F3, -3dB) deep bass under the low distortion and high SPL characteristics.

ultrumax-sub2-ph-2m.jpg    ultrumax-sub2p-1m.jpg


         It is quite easy to proper place the Ultrumax-U1p/-U2p/-U2p-ST speakers firmly onto the -Sub-IIph enclosure’s top.  First to insert the attached short metal bar into -Sub-IIph enclosure's top tray, then place Ultrumax-U1p/-U2p/-U2p-ST unit insert onto the metal bar through its bottom tray; please note that before the insertion, two industrial O-rings should be sleeved to the metal bar’s two ends from about 1cm (0.4”) distance, then smoothly do the insertions to ensure a firm and steady installation for this Ultrumax floor-standing speaker system, as shown on the photo. 


          This stylish -Sub-IIph enclosure is handmade by reinforced, low resonant CAM compound marble solid surface enclosure and has the following dimensions: W40 xD30 xH80cm (W15.7" xD11.8" xH31.5"). This enclosure structure is extremely strong and heavy, each -Sub-IIph enclosure weighs up to 34.5Kg (76 lb).


         The total height of this floostander as a whole when place Ultrumax-U1p on enclosure’s top is 100cm (39.4”), the height is 115cm (45.3”) when connected with Ultrumax-U2p, and the height is up to 121cm (47.6”) when placed Ultrumax-U2a-ST on it.




  Product Specifications: 

Product Name: Ultrumax-Sub-IIph, Passive Super Bass Enclosure

Reference Price: US$ 3,300/pair.

Frequency Response: 33Hz – 350Hz

Nominal Impedance: 4 Ohms

Power Handling: ≥150 Watts

Standard Colors:    Phantom White (MD-1011) + Starry Black (MD-1423) 

Enclosure Overall Size: W40 x D30 x H 80cm (W15.4”xD15.7”x14.6”)

Enclosure Weight: 34.5kg (76lb)






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