2-driver build · Sealed3 warnings
Shared speaker build
Dayton Audio RS225-4 + Dayton Audio ND25FA-4
A guided SpeakerForge build — the parts, the enclosure and crossover, and a compatibility check run server-side by the same engine that powers the builder. Published Thiele/Small specs are nominal; verify by measurement before building.
Drivers
Amplifier
Generic Stereo Integrated 2×100100 W/ch · min 4 Ω · Class ABrated 8 Ω · 2 ch
- Enclosure
- Sealed
- Box volume
- 20.0 L
- Crossover
- 2-way LR 4th2500.0 Hz
- Est. parts
- $102
- excl. drivers
Compatibility
3 warningsWarningTight crossover window for Dayton Audio RS225-4 + Dayton Audio ND25FA-4: only ~0.18 octave between the tweeter floor (~2.02 kHz) and the woofer ceiling (~2.30 kHz). There is little room to place the crossover; aim near 2.02 kHz.
Crossover designer — narrow window; target ≈ 2.02 kHz or change a driver. Open the crossover designer →
WarningDirectivity match (modeled): crossing Dayton Audio RS225-4 and Dayton Audio ND25FA-4 near 2.02 kHz gives the woofer ka ≈ 3.04 (poor match — the woofer is beaming while the tweeter is still wide). This is a modeled estimate from T/S; it improves with measured off-axis data.
Crossover designer — lower the crossover, use a smaller woofer, or a waveguide tweeter for a smoother directivity transition. Open the crossover designer →
WarningGeneric Stereo Integrated 2×100 delivers 100 W/ch, more than 2× Dayton Audio ND25FA-4's 20 W rating — easy to overdrive. Mind the volume, or pick a lower-power amp.
Amplifier matching — watch levels (amp out-powers the driver). Open the driver database →
NoteRemember baffle-step: a real cabinet loses ~3–6 dB of bass/midbass as output transitions from half-space to full-space. Budget baffle-step compensation (BSC) in the crossover, or expect a thinner-than-flat balance.
Baffle-step compensation calculator. Open the crossover designer →
Estimated parts cost excludes the drivers (their price varies by retailer); open the build to see buy links and the full parts list.