This blog post features a full set of acoustical measurements on the No.1198 Speaker. I also provide my subjective listening impressions.
A full description of this speaker can be found at the following links below...
Acoustical Measurements
Frequency Response
The Frequency response for the 1198 speaker is shown below. This measurements was taken in my studio at 1 meter using the Dayton UMM-6 reference microphone. Measurement software is ARTA. The response below is shown with the passive crossover. Below 500Hz was done with the ground plane measurement method. I did not combine the reflex port output in this graph.
The frequency response graph shows ±0.75dB from 500Hz - 8kHz. The response rises +1.65dB at 10kHz. The -3dB point is 15kHz.
Distortion
For the distortion limited SPL test I decided to compare these results with the 1159 stand mount speaker for reference.
The PDF of this comparison can be found here.
Test results show a maximum SPL of 90dB SPL at 1 meter from one speaker if using a distortion threshold of 0.50% THD. This is identical to the 1159 stand mount. Distortion does rise sharply above 95dB.
Step Response
The step response is shown below...
Burst Decay
Burst decay shows a very clean result.
Horizontal Off-Axis Polar Response
Subjective Listening Impressions
Below is a ranking for my subjective impressions on the sound quality...
Soundstage Depth --- 8/10
Soundstage Width --- 7/10
Smoothness --- 9/10
Coherence between midrange and treble --- 8/10
Vocal Clarity Male --- 7/10
Vocal Clarity Female --- 7/10
Accurate Musical Instrument timbre --- 8/10
Sense of Dynamic Range: --- 7/10
Conclusion
The 1198 speaker provides excellent sound quality for it's size category.