SUB XP2 Alu. A little giant made with a passive radiator. XP2 Alu is a modified version of the X2 model. Instead of reflex tuning, tuning is done using a passive radiator. The radiator, called "slave bass," is otherwise similar to the bass element itself, but has no magnet or voice coil. In principle, a subwoofer implemented with a passive radiator works in the same way as a traditional reflex housing implemented with a tube. In the passive radiator version, the tube is replaced with "slave bass". The excitation frequency of the housing is controlled by the mass of the cone of the passive radiator, while in the reflex housing the same thing is done by adjusting the length of the tube.
What benefit, then, is achieved with a passive radiator? Necessarily usually nothing, often normal pipe tuning works even better. But in the case of XXLS elements with different Peerless parameters, the passive radiator achieves certain advantages of which a very small housing is the most important. XXLS would work even in a small reflex housing, but the problem is to achieve a sufficiently low excitation with a tube long enough and large enough in diameter. Especially if the goal is also low-level playback. With a passive radiator, the tuning is sufficiently low even in a small housing. In addition, the flow sounds from the tube are no longer disturbing, a fact that is useful when listening to a lot of low-frequency material such as organ music or action movie explosions.
With a passive radiator, a very small housing can be reached. The model case uses a case with an internal volume of approx. 25 liters. However, in order to achieve a good result, the housing should be made of a material of sufficient thickness. The example case is made of 30 millimeter MDF board. The amplifier is an HT-Amp active module placed in the back wall of the housing in its own chamber separated by a partition. The elements were placed on the sides of the housing. An intermediate bulkhead was also made inside the housing by milling a large round hole in the 18 mm plate and immersing the remaining bulkhead in the grooves in the inner plate of the housing. the bulkhead was positioned so that the opening was located between the elements. The case thus became very sturdy. The performance of the XP2 Alu is astounding. Despite its small size, playback reaches as low as 20 Hz. The sound is sturdy and at the same time very precise and distinctive.
For the kit, you can select the desired amplifier from two different HT-Amp D-class active modules. The HT-Amp 600.1 gives a continuous power of 300w, while the 1000.1 powers are 500w / rms. The smaller amplifier is used sparingly in smaller spaces. When you want to get the most out of the element, we definitely recommend the more robust 500w model! (NOTE! HT-Amp fixed 25Hz subsonic)
If the color difference between the elements is hindered, you can also install the active element per floor. Take care of your feet high enough!
The set includes the following parts for one (1 piece) speaker:
- HT-Amp 600.1 amplifier module
- Peerless XXLS 10 Aluminum element
- Peerless XLS10 passive radiator
We recommend ASPA damping material as the damping material.
- The internal volume of the housing is approx. 25 liters
- External dimensions of the sample housing
(LxWxH) 360 x 360 x 450 mm
- Material 30 mm, front plate 30 mm mdf.
- It is recommended to separate the amplifier from the bass partition with a partition.
If you do not want to make the case yourself, you can order it ready-made. The pattern wood makes speaker cases from MDF or glulam according to the customer's wishes. The selection includes almost all the building kits sold by Hifitalo, and if necessary, you can also submit the speaker drawings yourself. See the link below for more information and prices.
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