Yamaha S4115H

the s4415h YAMAHA today are rare but not popular due to lack of knowledge and what is fragile, they no longer have now equivalent.
Boomer Ja 3803 has a white membrane that fears moisture. Its very thin when wet is what deforms and produces almost no serious and can crumple the base in case of excess power.
The medium has acute compression is used with a high cutoff frequency that prevents duck stamp flags of this type.
Not need much power to the amp, the performance is with More 100db/wm. The resulting sound is very different from what is manufactured today, the bass is dry and free trainage equivalent to a 2220 JBL, excellent balance with a small correction to 2.5 kHz and an attenuation of compression.
In short, a mini theater voice, the condition to dry boomers.
The construction is high quality, use for fixed installations.