New life for the old B&W 110i

[Korppi]

Hi

I have old B&W 110i with drivers broken. I want to use the enclosure in another project

Freq. res. 70hz - 20kHz
Cabinet size 25L
Height: 490mm Width: 260mm Depth: 250mm
Port inner diameter now 50,50mm
Port length now 70mm


Driver i want use in the enclosure is HDS-P830874 Peerless


Specifications

DC ResistanceRevcOhms6.55.0%
Energy Bandwidth ProductEBP(1/Qes)*fs
Minimum ImpedanceZminOhm s7.32 7.5%
Moving MassMmsg17.3
Voice Coil InductanceLemH0.42
Suspension ComplianceCmsum/N434.3
Resonant FrequencyFs Hz 58 15%
Effective Cone diameterDcm13.5
Mechanical Q FactorQms2.29
Effective Piston AreaSdcm^2143.1
Electrical Q FactorQes0.53
Effective VolumeVasL12.5
Total Q FactorQts0.43
Motor Force FactorBLTm8.82
Ratio Fs/QtsFFs/Qts135.2
Motor Efficiency Factorß(T*M^2)/Ohms12
Half Space Sensitivity @2.83Vdb@2.83V/1MdB88.44+/- 1.0db
Voice coil former MaterialVCfmASVHalf Space Sensitivity @1W/1Mdb@1W/1MdB88+/- 1.0db
Voice coil inner diameterVCdmm32.41
Gap HeightGhmm6
Rated Noise PowerPW75
Maximum Linear ExcursionXmaxmm5.3
Test Spectrum Bandwidth 50Hz - 4kHz


What would be the new port length and inner diameter?

I can make the enclosure smaller if needed

 

[Korppi]

According to this



HiFi Loudspeaker Design


The existing port is perfect for this driver, am i missing something?

Vb 25 liters


Fb = 46.79 Hz Port alignment frequency



F-3 = 42.75 Hz 3dB Down Point

Port Calculations

Diameter of port(s) Dp 4.95Cm
Single Port Port area = 19.28cm
Port length(s) = 7.11cm

 

[PRR]

If the new driver is fairly similar to the old driver, no great change of cone or magnet size, it is entirely possible the same box and port will be a good fit.