The first one of these I bought didn't register any sound.... I thought I was doing something wrong, but it was a duffer. The second one worked immediately... I tested it by blowing gently into the "sensor" whilst looking at the needle.
Anyway, I calibrated my home cinema as follows....
1. On AV amp, set all speaker channel levels to "+/- 0db"
2. Set SPL meter to C-Slow
3. Set SPL meter to 80db sensitivity (this means that when the sound it receives is 80db, the needle will sit on 0db - i.e. there is 0db deviation from the 80db)
4. Send the test tone on AV amp to the front speakers, turn the volume up until the SPL meter shows 0db (i.e. the test tone was playing at exactly 80db).
5. Send test tone to each surround speaker in turn, including the sub, adjusting the channel level on the AV amp for each until all channels registered as 0db on the SPL meter.
6. Once done, it is worth doing a repeat check to make sure they're all set ok.
That's it!
It sounds long-winded/complicated, but it really is straightforward.
People with modern fancy pants AV amps might rely on the built in calibration, but for people with older systems, this really is a cheap an effective method. If your AV amp doesn't have a test tone facility, some calibration DVDs have one on them.
| Manufacturer | SLTL4 |
|---|---|
| Part Number | 633937 |
| Product Dimensions | 0.07 x 0.18 x 0.05 cm; 104.33 Grams |
| Item model number | 633937 |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 104 g |