Question about DBX DriveRack 480 Processing Unit Home Equalizer

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Choosing band subwoofers

Our band is loosing our bass player and we need to purchase 18" subs. I normally buy JBL and for our mids and high freq. we use the SRX series. Does anyone know if I will hear a difference with using the JRX or the MRX series instead of the SRX 18" subs?

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  • Len Falk
    Len Falk May 11, 2010

    The SRX series is the powerhouse top-end of JBL. Was it the 738 model, 728 or 718 and how many? If you are balancing a system based on power output, I would stick with the series not just on aesthetics, but overall performance of your needs. Not knowing whether you are dual or tri-amped (or more) on your system, what you have to power these new subs will eventually help guide you to which ones you choose. I usually over rate the amp over the speaker so as if something is going to "give" it would cost me less. If you have been to JBL's site then you can see the difference in specs to the three lines in question. The JRX has a high cut off @ about 300hz. The MRX and SRX are @ 200hz (with a significant more "push", both physically and financially. If aesthetics is NOT an issue, have you looked at EV's? The Black Label line is just as impressive as Peavey's ever was and I say this living less than a half hour's drive to Community Sounds front doors.
    Hope this helps



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Posted on Sep 20, 2014


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SOURCE: Which Bass Sub?

go with the db15 active/powered sub. And cross it over at 90Hz.

Posted on Apr 02, 2010

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How to adjust Dg11100 car amp

If your head unit has an amp gain, turn it up as high as it will go. If it is hooked up to subs, the head unit will say subwoofer output in the menu. Then take a small screwdriver and turn the amp gain on the side of your amp counterclockwise to zero. Turn your freq. up to about a third. Crank your system up, with a song with good bass, and slowly turn your gain up till the bass from the subs sound distorted, and back it back down. If the bass is drowning out the other speakers in your car, then turn the gain down some more. I find it works best if you have your trebble up high, your mid range at a little less than half. And your bass at zero or one. Your amp is cranking up the bass, so let your other speakers handle the rest. This allows it to sound clearly at higher volumes.

Jan 02, 2013 | Cars & Trucks

1 Answer

I put a sub in my 2002 Altima but when I turn it up the bass cracks on the door speakers??? What do I do to get all the bass on the sub

Hi Ethan,

What you're looking for is called a "crossover". A crossover is an electronic filter for an audio or speaker circuit. In an audio circuit, a crossover is used to prevent or pass certain frequencies or a range of frequencies from passing through it. Since your sub will reproduce the bass or low frequencies, you don't want other speakers to reproduce them. A band pass filter on your door speakers will do this for you. A band pass filter passes only a range or "band" of frequencies and blocks those that are above and below the range or band of frequencies selected. Installing a band pass filter will prevent the very high & very low frequencies from getting to the door /dash speakers. Likewise, you should consider connecting a low pass filter to your subs, too. The low pass filters work a little differently from of the way band pass filters work - they only allow low frequencies to get to the sub - blocking all the other higher frequencies (your other speakers are better suited to reproduce those). Lastly, you would install a high pass filters on tweeters. Tweeters are designed to reproduce only the high frequencies - sending mid and low frequencies to them is wasting power and can cause damage to them.

You purchase the filters for specific crossover points (the block / unblocked point) as determined by the individual speakers. If a sub has a frequency response of 20Hz - 100Hz, a low pass filter of 100Hz would be ideal. Remaining filters would need to begin at 100Hz - assuming the mid-range speakers have a frequency response beginning at 100Hz. A band pass filter of 100Hz - 3KHz would fit the bill nicely if the mid-range speakers go up to 3Khz Match the high end of the band pass to the high end of the frequency response of the mid-range speakers. Next, a high pass filter at 3KHz would allow only the high frequencies to your tweeters. Basically, you want to have the entire audible range 20Hz - 20KHz covered by the speakers and have the crossover points that match the frequency response ranges of the speakers.

I hope this helps & good luck!

Apr 12, 2012 | Pioneer Car Audio & Video

1 Answer

How much air space is need for a sealed encloser

are you sharing the air space or building a divider to give each driver its own air space

these speakers or not made for low end bass these woofer are meant for mid bass high bass
  • 6.5'' High Power Subwoofer
  • Non-Press paper Cone
  • Specially Treated Foam Edge Suspension
  • 1.5'' High Temperature Aluminum Voice Coil
  • Magnet Weight: 40 Oz
  • Impedance: 4 Ohm
  • Fs: 80Hz, Qms: 4.05, Qes: 1.3, Qts: 1.2, SPL: 87(dB), Vas: 6.8(Cuft)
  • Mounting Depth: 3"
  • Rubber magnet Boot Cover fers are
  • there is only 3 " of mounting depth needed i would build you door pannel out fiberglass a door pod and mount them on the door if you have a factory speaker there . then run to the amp and turn the x-over on to high pass and them use them as a mid bass driver up front for the front sound stage for get about them as a subwoofer get the lanzar 10's or 12's

    i mounted a set of ma audio 8" subs on my 03 s-10 door the speaker fit in the 6.5 location had to trime the door metal and space them out a little cause the 4.75 mounting worked and then i ran the them in 2 ohm stereo to my 4 channel amp and used the high pass crossover to run them as a mid bass driver works great for me . ma audio 500 watt dual 4 ohms 8" subs each i had 250watts to each sub.

    you could build a small enclosure just big enough to fit the 6.5 woofer you could build a dual camber enclosure like 8wx5dx8h internale air space would be 0.18

    15 wx5dx8h would give you 0.347 share the air space this is internal air space

    Oct 16, 2010 | Lanzar MAXP64 Car Speaker

    1 Answer

    Can we use the subwoofer as an amplifier for speakers? it has jacks for speaker in/out, but i can't figure out how to make it work because the speakers have no sound.

    I don't believe this hookup is amplified; but, if you have used the regular unfiltered speaker connections from your receiver/amplifier to hookup the subwoofer, the system will pass the signal thru the outputs subject to the crossover adjustment on the back panel. You cannot get the full signal if your system is sending only the bass signal to the subwoofer. I have copied the instructions below from the manual. You would set the high freq crossover to the low end of your satellite's frequency range. The full manual is here:

    High-Pass Control
    • If you hooked up your subwoofer
    as shown in Hookup
    3 on page 4, you also have
    the capability of adjusting
    the high-pass frequency.
    The High-Pass control
    determines the frequency at
    which the main speakers
    will start reproducing
    sounds. If your main speakers
    can comfortably reproduce
    some low-frequency
    sounds, also set this control
    to a lower frequency
    setting, between 50Hz –
    100Hz. This will concentrate
    the subwoofer’s
    efforts to the ultradeep
    bass sounds, while your
    main speakers continue to
    reproduce the mid-bass
    information. If you are
    using smaller bookshelf
    speakers that do not extend
    to the lower bass frequencies,
    set the high-pass crossover
    control to a higher setting,
    between 125Hz – 180Hz.
    With this setting, your main
    speakers will not have the
    burden of reproducing any
    low-frequency sounds.
    • If you hooked up your subwoofer
    as shown in Hookup
    1 on page 3, the high-pass
    frequency is fixed at 180Hz.
    • If you hooked up your subwoofer
    as shown in Hookup
    2 on page 4, there is no
    high-pass control. Unless
    your receiver/amplifier
    incorporates a high-pass
    crossover, your main speakers
    will continue to get a
    full-range signal.
    Final adjustment and blending
    of the low-pass and high-pass
    controls may evolve over several
    listening sessions. A good
    starting point would be to set
    both the low- and high-pass
    controls to the same frequency
    and adjust from that point.

    Sep 07, 2010 | JBL PSW-D110 Speaker

    2 Answers

    Cannot get the sub woofer to work.

    Now tell the NAD you have a subwoofer. Page 15, Figure 13, etc. and Page 18 - 19.

    Mar 05, 2010 | NAD T770 Receiver

    1 Answer

    Not gettin enough bass

    Hello saini_jatt_2, On the JBL3501 700 watt monoblock, you have adjustments for low pass and a setting for boost marked DBO, allowing you to select and boost the frequencies sent to the subs. If your amp is not the 3501, but a different JBL amp, the settings may be different. Set the LP to either the white dot (about 100Hz) or slightly below to about 80Hz. Set the HP to about midscale or slightly higher. Set the boost to wherever the bass sounds best. One other setting that will affect bass volume is the "input level" or gain control. It should have been properly set by your installer, but you can "tweak" it for best performance. Turning it up increases the sensitivity and matches it with the output from your head unit. Too high will cause distortion. Too low will result in less bass. So you want to set it just to the point that you begin to hear the distortion and then back it off slightly until the distortion disappears. Hope this helps.

    Jun 05, 2009 | JBL GTO1202D Car Subwoofer

    1 Answer

    Equalizer setting help

    try to use the preset equalizer settings after which you can come back to the parametric equalizer and adjust to your own taste. no problem if you don't connect the subwoofer just make sure you set the hi-pass filter to off so that you will hear the full range to your speakers. but, I advice you to put a subwoofer. There is more dynamics to the lower freqs too. don't adjust the source level if there is no problem. take note the EQ of your head unit is a parametric equalizer. hope this helps while you read about parametric EQs.

    Apr 20, 2009 | Pioneer EQ-6500 9-Band Car Equalizer

    1 Answer

    I plugged int he rca's but he the lowest sounding bass possibe

    kicker subs arnt ment to hit the lowest bass, unless you go spend a **** load of money, im talking 3000 wat amp, ant some 15' or bigger subs. the most commen kickers are 12' subs, so im asuming you have 12' subs, if not, this (said lightly) should work. try turning the bass boost screw on the amp to the middle of its turning range. this will offer the greatest balance between high and low bass. if you want more low bass, turn it past half. if you want more high bass, turn it down. i have mine set to mid range, but i also recently purchased 2 18' kickers. with every new set of subs, you should spend at least 15 min tuning the amp to get the best performance. every sub is different. hope this helps, good luck.

    Jun 27, 2008 | Kicker KX800.2 Car Audio Amplifier

    1 Answer

    Inifinity 1252w subwoofer

    this is probably due to the box they are in. it seams that your box is tuned to a lower freq then the bass hits that are popping. message me with the box dimensions and the speaker parameters

    May 28, 2008 | Infinity 1250w Car Subwoofer

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