JBL 2123H
Thiele-Small parameters
| Nominal size | 10" |
|---|---|
| Impedance | 8 Ω |
| Fs | 85 Hz |
| Qts | 0.322 |
| Qes | 0.37 |
| Qms | 2.5 |
| Vas | 19.8 L |
| Sd | 316.1 cm² |
| Xmax | 2.5 mm |
| Re | 4.2 Ω |
| Bl | 12.3 T·m |
| Mms | 24.8 g |
| Pe | 250 W |
| Sensitivity | 100 dB |
Alignment hint
| EBP | 230 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 5.2 L |
EBP > 100: favours a ported (bass-reflex) alignment.
Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.
Substitute candidates
| Driver | Fs (Hz) | Qts | Vas (L) | Xmax (mm) | Sens (dB) | Fit | Notes | Compare |
|---|---|---|---|---|---|---|---|---|
| JBL 2123J | 85 = | 0.322 = | 19.8 = | 2.5 = | 96.8 -3.2 | close | 16 Ω vs 8 Ω: amp load changes | + |
| Celestion BN10-200S8 | 89.4 +4.4 | 0.352 +0.03 | 20.5 +0.7 | 2.5 = | 99.5 -0.5 | close | + | |
| 18 Sound 10NMB420 vp CF1 | 84.8 -0.2 | 0.318 = | 26 +6.2 | 3.3 +0.8 | 100.2 +0.2 | close | + | |
| RCF MR 10H300 | 90 +5 | 0.312 -0.01 | 16.5 -3.3 | 2.7 +0.2 | 98.9 -1.1 | close | + | |
| RCF L 10/581K | 85 = | 0.369 +0.05 | 25 +5.2 | 2.5 = | 99.9 -0.1 | close | + | |
| Beyma 10MI100 | 89 +4 | 0.251 -0.07 | 20 +0.2 | 2.5 = | 100.4 +0.4 | close | + | |
| PHL Audio 3451 | 91 +6 | 0.353 +0.03 | 17.8 -2 | 2.1 -0.4 | 99.3 -0.7 | close | Xmax 2.1 mm < 2.5 mm: lower excursion-limited SPL | + |
| RCF MB 10G251 | 76 -9 | 0.335 +0.01 | 24 +4.2 | 3.5 +1 | 98.6 -1.4 | usable | + | |
| LaVoce WAF102.50A | 71 -14 | 0.311 -0.01 | 23.6 +3.8 | 3.2 +0.7 | 97.7 -2.3 | usable | + | |
| LaVoce WSN102.50 | 76 -9 | 0.39 +0.07 | 20.71 +0.91 | 2.9 +0.4 | 97.5 -2.5 | usable | + |
Compare the closest 3 against the 2123H →
Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.
Used in enclosures (0)
No enclosure in the catalog uses this driver yet.