The foam was looking restrictive upon inspection, I cut the excess foam approx 10:10 - 9:15.
That and recently did some amp auditioning with Krieger that he had. Used my car setup.
A/D/S (75x8) vs Pioneer ODR (50x4) vs Addzest APA 4400 (100x4).
I`ll just summarize them shortly how they felt to us:
For pure sound quality, A / D / S sounded best. Highs were mellow and sound was "open". Mid bass was lacking though. Something i was looking to improve over my Addzest APA 4200.
Pioneer ODR was a disappointment. Very mediocre performance. Weak mid bass, harsh highs, it was like listening to a china amp (comparatively speaking). Krieger had very high hopes from this one it being the flagship Pioneer amp
Addzest APA 4400 was more like SQL. Mid bass was solid and mid bass drivers came alive. Highs were comparable to the A/D/S. It was very difficult to choose between the A/D/S and the Addzest but overall this was the best pick for me and I let it stay in my car.
It was fun though