The subwoofer circuit includes a phase inverter. Its port is at the left side of the box (the phase inverter serves as an amplifier of low frequencies here). The wooden case of the subwoofer is a cube with a 6.5” dynamic speaker in the front. The sides of the case are half an inch thick. The cube is supposed to be placed somewhere on the floor, pretty far from the display (the magnet of the LF speaker as well as its case have no screening). The false-panel of the subwoofer performs purely decorative functions and doesn’t protect the diaphragm against any accidental contact with your feet.
The port of the phase inverter is glued dead to the wooden box
Creative uses CSW speakers in its speaker systems
A rubber sealing ring is fitted around the outer rim of the low-frequency speaker. It should provide tight contact between the speaker and the case and eliminate any resonance. But they made a mistake during production: this sealing ring is on the outside rather than inside. You can see it in the next snapshot:
(1) The sealing ring, (2) 6.5” LF speaker, (3) Phase inverter port
Among other peculiarities of the subwoofer case design we can point at the absence of damping material. In practice, it means that there will be resonance of the internal components at certain frequencies and volume level, leading to poor sound quality. As an example of correct design of the acoustic enclosure we show a snapshot of the subwoofer from the more expensive MegaWorks system. Glass wool is the damper here:
Glass wool has excellent damping features.
We only wish the Inspire subwoofer had it inside.
All the connectors are placed at the back panel of the subwoofer. A special analog cable with color-coded lines comes with the system to connect it to Audigy2.
The panel carries the following connectors:
- External power supply connector;
- Six analog RCA connectors (for the satellites);
- Three analog mini-jacks (for connection to the audio card);
- Composite remote control connector.
The panel also features a switch between the real and emulated seven-channel connection (5.1 / 6.1 – 5.1 / 6.1 upmix). Thus, you can use this speaker system with a 5.1 audio card (like the first Audigy). In the “6.1 upmix” mode the sound of the rear 5.1 channels is mixed up onto the central channel, which suits quite well for listening to music (don’t forget that correct three-dimensional sound positioning is lost in this mode).