Spectrum Analysis Comparisons
Before offering speakers for sale, I wanted to find high-quality speakers that sounded good. I could not trust my own ears and subjectivity to determine which had very good sound. So to be objective, I tested the speakers using frequency spectrum software and have posted the results here. My lab was not perfect (the lows show subtle background noise of my room, for example), but it didn't need to be perfect for comparison purposes. With the "perfect" (impossible) speaker and testing enviroment/equipment, the graphs should show a flat line. The flatter the curve, the better the speaker recreates the sound. Sudden peaks and valleys are "bad". All small speakers will not have much in the low range (left side of graph, below 300hz).
First, some comparisons to conventional DCC speakers
Next, mounting a sugar cube w/ baffle inside the loco shell and using the shell as a resonance chamber, vs pointing the speaker out a hole and isolating the speaker from the shell.
Comparing the 11x15 Sugar cube with the Regular 13x18 Sugar Cube
And comparing the 11x15 sugar cube to HQ 13x18
Baffle vs. no baffle
My older baffle which covered the front of the speaker, vs. the current baffle which covers the back/contacts. Also a undersized baffle vs. correct size.
And finally, using one sugar cube speaker vs. multiples in an array (attaching them side-by-side)