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For the DIY guys i have tested the IMF on this ''PROJECT SUB" similar to the RCF 4PRO Series Subs and it works really great! The massive bass it produces almost matched my subzeroes.
i think it's on the cone thickness. hindi kasi kasing kapal ng cone ng imf as compared to the other 3 p-audio 18" models. a thinner cone means more defined (bass) response like speakers used for musical instruments amps. and the imf uses ribbed type cones as well kaya better bass reproduction and more durable than flat cones. the imf also has a single spider design unlike the rest. in my experience a single spider design can move (excurse) faster than a dual spider lay-out. lastly, my friend from the states mentioned that he remembers that the imf hp18s has been a favorite o.e.m. for some branded lower variant dual18 subs like eaw and ev models.
this speaker intrigues me a lot. ito yta ang pinakamura sa p.audio 18". around 6500 only . my friends keep on telling me that it sounds good and yet it's reasonably cheap. it has a 4" copper vcoil assembly and steel-stamped frame. i'll try to ask my friends if we can take a closer look at this model and share some pics here.
gud pm sir try mo fane colossus 18xb mas malapad tumunog. i pa try ko sau kabit mo sa spkr mo.
magandang araw... parecommend naman ng cabinet best suited for this speakers. if you have plans/links, post na lang pls or send to lim_marta@yahoo.commaraming salamat
4" copper voice coil 600w rms with ribbed-type cone.p6500 with 5% discount for a minimum of 4pcs. not bad