11 replies to this topic

[binge]

Ok, installed a Sub and an amp the other day. only yesterday did I noice (after opening the boot while music was on) that my sub is acting like a normal Speaker...


Now I have a "Sub out" on my Head unit. Ive got it set on "Full" on the amp as the oter setting is for No bass at all.

How do I go about getting it to act as a sub and not a normal speaker?

And CHEAP! :cheese:


<|Ben|>

[rob mini]

get a crossover! mine does this aswel and its because the amp doesnt have a low pass filter. try maplins, i think they do em cheap

[jamieoliver]

A problem one of my mates had was that he had the LOUD setting off on his HU. so it mite be a case of finding the loud button n itll all be fine

[Pavel]

Sub output on head unit? What head unit do you have? This usually implies a filter built in to this exit, just a matter of switching it on on the head unit.
Also your amp really should have a filter, unless it utter C**p:\ I can't think of any amps to be honest (not even the cheapest brand name ones I know) that don't have even a simple filter system for a sub channel.

Some more details of your equipment would help!

[lostininglewood]

sounds like a low pass/hi pass issue.

check your deck too, as i know that on my alpine I have subwoofer volume and db control.

keep us updated. :cool:

[binge]

Ok, I have a AWIA CDC-R304

• dark silver facia (detachable)
• blue display/key illumination
• mos-fet 52w x 4 max output power
• dssa
• h-bass
• dimmer control
• drive-s
• source level adjuster
• 7 preset / 3 band eq
• front aux input jack
• pre / sub changeable line-out
• rds


My amp is a cheap C**p Sound Storm 400watt thing I got in amearica. it has a High Pass filter setting, and a "Full" setting.


I took my bedroom speakers apart AGES ago and it has a Crossover for the different components in the speaker box. Ive used put the crossover from that in my system and it hasnt made a difference at all...

Any ideas?

Cheers

<|Ben|>

[Pavel]

Okay on your head unit you'll have to change it so that the output (line output) is SUB, not PRE-OUT. If SUB it should stick some sort of filter on it. If you select pre-out it will play full range of frequencies.

You sure your amp has a high-pass filter? What's the frequency range of the filter?

[rob mini]

sorry to hi-jack the thread but i have an alpine 9828rb headunit and i dont seem to have this filter on either. my amp is an alipine but is ancient so hasnt got a filter

[Scarface]

rite as been asked "You sure your amp has a high-pass filter? What's the frequency range of the filter?" If this filter drops low enough u can use this as a subsonic filter meaning u can have it set so the sub doesn't try and drop lower than it /the enclosure was designed. Then once u switch the sub pre out on u should either have a fixed lp filter or 1 u can adjust, then all should be good.

[Pavel]

Highly doubt it will act as a subsonic, and even if it does won't make much of a difference to a budget set up.

If however the guy got it confused and the amp has a low pass filter it's all much easier. Just need details of head unit pre outs and confirmation of amp filters!

[binge]

I have the Pre out set to "SUB"

My amp has a volume control and a Switch for each channel...

Now The switch is on the "Bassyest" setting at the moment. its got "FULL" and "HI PASS" Written on the switch...

Its really gay... A totally naff amp I bought in America!



<|Ben|>

[Pavel]

umm... that IS gay

Dunno if its possible, but... get another amp? Will probly sound better too!