Recent content by Farside

My amp is mounted on my sub box, is this a bad idea? could the vibrations be messing things up? I tested it by wiggling the amp/sub power connections with the stereo playing and the subs power output didnt fluctuate. i'll try it with the head unit as well i guess. I've dissconnected and...

ok, first let me say thanks for the replies. I measured the voltage at the amp with the car running and stereo off (14.5 volts) and with the stereo running (14.5 - 14.4 volts dipping a little with bass) soit seems that my voltage is fine. My headlights dont dim when the stereo is on either...

unfortuntely I dont have a voltage guage on my dash, but if I measured it at the bat or amp I think it would show the same result, I'll give it a try thanks My car is a 93 civic cx so it doesnt exactly have the biggest battery or alt. If it is my electrical system would you suggest getting a...

OK, I disconnected all my connections and cleaned/tightened them up so I'm sure theres no bad connections. I cleaned the battery terminals (they looked ok but I did it just to cover all my bases) and used a grinder on the ground connection just to make sure its a bare metal to metal connection...

I'm having an intermitent problem with my setup (Alpine 12" w. coustic 400W amp). Its hard to decribe but I'll try my best...It seems as if the power output of my Sub fluctuates. sometimes when it hits a note it'll be really hard and others it will be soft for the same notes, but it seems to be...

oh...I guess I mustve misunderstood that changes everything Thats great though, I'll have lots of room for a port now, thanks again.

This is the picture... your looking at the side thats 22" long x 16" deep using 3/4 MDF and a 4" port. The port is about 3" from the outside walls and 1" fom the subs magnet. (The type r sub is 7" deep from underside of the flange to the magnet) If I use 17" deep box then i can move the port...

Well the port runs beside the sub then turns 90 deg and runs along the bottom of the enclosure underneath the sub right under the magnet. I guess since it under the magnet then air wont be blowing directly into the port from the sub then you say I'll be ok? If I use the 1.848 ft^3 that WinISO...

I'll try to clarify.. box is 22" x 14" x 16" The port opening and the sub are on the same side 22" x 14" with about 2" bewtween the widest part of the sub and the port. The port centerline goes about 10" into the box (in the same direction as the sub) then 90 Deg turn for another 12". for the...

I'm building a box for my 12" Type R using a 4" port. I believe Jmac helped me with this earlier, but I'm trying to fit a 22" port into a box with a gross volume of 2.15 ft^3. right now outside dimensions = 14" x 16" x 22" I was told to keep the port a minimum of 3/4 Dia (or 3" in my case)...

ok thanks for all the help and bearing with me since I'm a nubie at this, Using WinISD Volume=1.68 ft^3 (Is this Vb in WinISD?) Tuning Freq=27.4 4" dia port @ 24.5" long for two free ends (even with an 90deg elbow I think it'll be a tight squeeze) or 24" for one flanged end. The port air...

Hey thanks again, I've decided to use a Vb=1.68 ft^3 box (internal volume not including sub & port displacement, I assume thats what Vb is) with a 4" port 22" long Tuned to 28.7 Hz. Still cant figure out that dam minimum port diameter calculation :blow_up: , but oh well 4" sounds...

thanks for the reply... my sub is a SWR-1221 and I'm powering it with a Coustic 400 WRMS amp, if that changes anything. One more question....can a port stick out the side of the box if there isnt room for it inside the box? thanks

Hey there I have a 12" Apline type R sub, I've been reading various DIY ported box formulas, including those on Loudspeakers101.com. By entering my Subs parameters I get Vb=1.912 ft^3, Fb=27.1 Hz I get a minimum port diameter of 5"? does this seem too large? If I use this value of port...