Parts Express $85 120 watt amp

Discussion in 'Archived Threads 2001-2004' started by Tyler, Jun 24, 2001.

  1. Tyler

    Tyler Stunt Coordinator

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    Is the parts express $85 plate amp any good ?
    It has 120 watts into 8 ohms & 150 watts into 4 ohms.
    The thing i'm worried about is the 5dB bass boost at 35Hz.
    Would that bass boost become anyoing.
    Does the bass bost mean when the sub hits 35Hz then the 5dB bass boost comes on then when it rolls off of 35Hz it turns off ?
    Please help thanks.
    Here are the specsThis quality amplifier is perfect for your next subwoofer project. This full featured amp includes both high and low level inputs, both with loop-through capability, phase reversal switch, volume control, defeatable auto on/off (activated by input signal), and a 12 dB electronic low pass filter that is continuously variable from 40 to 160 Hz. The high-level input features a 6dB high pass filter (125Hz, 8ohm) output for satellite speakers. The low-level input also has a -6dB high-pass filter and gold plated RCA connectors. The amp has thermal, overload and fuse protection for years of reliable use. It is enclosed in a sealed housing and detachable power cord, which make installation a snap! The amplifier sums the right and left stereo inputs to a mono output, so that only one amp is required per system. Specs: *Power: 110 watts RMS into 8 ohms @ 0.1% THD, 156 watts RMS into 4 ohms @ 0.2% THD *Bass boost: 5dB @ 35Hz. *Signal to noise ratio: 98dB (A-weighted) *Dimensions: 8-1/4" W x 10-5/8" H x 4" D *Mounting hole dimensions: 9-5/8" x 7-1/4" *Net wt: 9-1/2 lbs. *Voltage: 115/230 VAC switchable (Note: The standby feature allows the power light to remain lighted when unit is switched to the "off" position.)
    http://www.partsexpress.com/images/300-792m.jpg
     
  2. Fred Seger

    Fred Seger Stunt Coordinator

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    I'm using that amp to drive a sealed tempest. IMO it is a decent amp. Depending on your sub design, the bass boost will have to be removed, or changed to a lower frequency. Instructions for removing/altering the boost should be on the PE site somewhere.
    Although twice as expensive the 250 watt amp adds a subsonic filter and variable phase control. The bass boost is also at 30 instead of 35, incase you don't want to mess with removing or changing it.(although it's not that difficult)
    Good Luck with your sub.
     
  3. Tyler

    Tyler Stunt Coordinator

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    Thanks.
    What do you have to do to disable the bass boost ?
     
  4. Anthony F.

    Anthony F. Stunt Coordinator

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    The Apex Jr. amp is in the same price/power range, but does not have a bass boost, in case you're not up for the audio surgery involved. Seehttp://www.apexjr.com .
     
  5. JohnnyG

    JohnnyG Screenwriter

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    The point that stood out in my mind when I was looking at the PE amps is that none of them seem to have a crossover bypass switch.
    ------------------
    John Golitsis
    Next Big Thing Electronics
     

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