Description

Unrivaled power handling producing 1800W RMS and 7200W AES short Peaks. The RMJ  1800 MK4 is probably the world’s most powerful speaker.

8OHMS 18″ DIA

IN STOCK AT MANUFACTURER – PLEASE ALLOW 7 -10 DAYS DELIVERY

Thiele/Small parameters

MANUFACTURER Royal
MODEL 1800 Mk 4
DATE 11-01-2014
Fs 32.4900
Fs Added Mass 29.1296
Fs Known Vol 0.0000
Added Mass 71.5000
Known Vol 0.0000
Diameter 415.0000
ZMax 90.8954
ZMax Added Mass 78.1610
ZMax Known Vol 0.0000
Z F1F2 20.8878
Re 4.8000
Rms 10.7065
Qms 5.5867
Qes 0.3115
Qts 0.2950
Cms 0.0819
Mms 293.0033
BL 30.3608
VAS 209.2376
dBSPL 95.6474
L 1kHz 6.7473
L 10kHz 2.3255
CAS 1.498445E-0006
RAS 585.1594
MAS 16.0140
RAT 11080.9000
SD 0.1353
LCES 75.4910
CMES 317.8674
RES 86.0954
MMD 264.8457
RMT 202.7436
eta 2.2118
Z Min 7.5242
Z AVG 72.8399