Research on acoustic metamaterials (AMMs) relies on samples prototyping implemented with geometrical details suggested by analytical or numerical studies where additive manufacturing (AM) is the main technology for quickly reproducing the given geometries addressing specific resonance frequencies. However, AM parameters are generally not intended precisely for acoustic purposes, which may lead to a mismatch between the expected analytical and numerical results. In this study, AM parameters have been investigated to define the optimal printing configuration of a coiled-up resonator (as an example of AMM). Three printing techniques - Fused deposition modelling (FDM), Stereolithography (SLA), and Selective Laser Melting (SLM) - and four materials (PLA, PETG, Resin, and Stainless Steel) have been investigated due to their popularity among researchers. Experimental measurements of sound absorption of each sample in two Italian research laboratories (INRIM Turin and University of Bologna) were compared to the analytical and numerical ones. For FDM technology the impact of Printing quality and speed resulted the key factor. The SLA/Resin combination performed better overall; however, properly set FDM and PETG can achieve nearly the same acoustic precision in a cheaper and faster way. It is expected that these findings could be replicated for other AMMs.