GLMedia · Prepare the sound system
RCF SUB 8004-AS
A powered subwoofer for music systems that also need tops, filtering, mains power and operation defined.
Ask about rental or technical support
Start with date, venue and approximate needs. We assess options, configuration and operation; availability and terms are confirmed in the proposal.
Model and connections
Distinguish SIGNAL LINK from XOVER SIGNAL OUTPUT: the first links the signal; the second provides a high-pass feed for satellites according to the selected crossover. Confirm SUB 8004-AS panel and manual rather than copying another SUB.
Prepare and check
Start with date, venue, music and approximate space. Separate speaker supply, distribution, configuration and operation; identify missing information for the next stage.
We can assess rental, purchase, integration or support. Start with date, venue, program and approximate sources; quantities, compatibility, availability and terms are confirmed in the proposal.
Questions and decisions
What is needed beyond the subwoofer to quote a show?
Describe existing tops and mixer, sources, music type, positions and load-in access. Record inputs, selected output, filters and levels; verify nameplate voltage and suitable power distribution for the complete system. Test a moderate reference through each stage: clean signal must reach tops and sub before balance is assessed.
Can a quantity and drawing define several subwoofers?
They start a proposal but do not establish alignment, uniformity or mounting approval. Document models, orientation and available controls; use only configurations approved for the exact units. On site, verify signal arrival, polarity, timing, balance and physical stability. Do not copy delays from another system or treat a photo as approval.
Documentation and references
23/10/2026