H30 LB 15 Coaxial.

High efficiency 30 cm (12")



High efficiency 30 cm ( 12" ) time-aligned coaxial driver ( the 2 emissive centers are in the same place ) that is not impacted by overlapping frequencies or by filtering over the most sensitive zone for the human ear, paper cone, SN12 lead-free bronze basket and ring, pole pieces are made of very soft steel with less than 0.20 % carbon in a pot shape with central ALNICO 3SC magnet : the full magnetic field is located within the gap and protected from other magnetic interferences like TV emissions, plus a piezo-electric tweeter featuring high impedance, fit into an SN12 bronze pot, steeply high-pass filtered at 11 kHz and reaching to over 30 kHz.

Each driver part is thoroughly controlled and measured all along the manufacturing process. Each driver is put through an intensive pre-running and then measured in order to match pairs with a maximum tolerance delta of 0,1gr. on mobile equipment mass, 0.1 Ohms on d.c. resistance, 1Hz on resonance frequency. These matched drivers are then numbered and provided with a lifetime warranty ( first owner ) .


ø voice coil = 35 mm
h = 8 mm 2 layer cu
M = 10,5 gr
dB = 97
G = 1,2T alnico 3SC
Power = 50 W rms
fs = 36 Hz
re = 13,8 Ohm

Qes = 0,62
Qms = 6,60
Qts = 0,59
Vas = 224 litre
Z = 16 Ohm
Zmin = 14,9 Ohm
Zmax = 125 Ohm
D = 230 mm

hole diametre = 270 mm
7 screws ø 5 x 51,43°
on r = 144
Net weight = 9,3 kg
Packed weight = 13,5 kg





These values are indicative only and are representative of typical measurements in our anechoic chamber. One should always keep in mind that the naturalness of reproduction, balance and musicality cannot be described by those measurements and only partly derive from them.
For improving performance and manufacturing quality, Phy-HP reserves the right to make changes in specifications without prior notice.