Buyout Special

Technics REQ0251-1 100W Subwoofer Plate Amplifier

Brand:| Model: REQ0251-1
Save up to 50% off this 100 watt, 1 ohm stable, subwoofer plate amplifier through this Parts Express exclusive factory buyout!
  • Auto-on circuitry with a silver remote power panel on a 16" lead
  • 50 to 200 Hz variable, 12 dB/octave low-pass filter
  • Phase-reverse switch
  • 1 ohm stable
Part # 
Weight: 4.1000 lbs.  
Regular Price$99.00
You Save59%
Sale Price
Polarized 2-Pin Universal AC Power Cord 6 ft. Type D
Qty: 1Part # 110-103
List Price:$5.99
Part # 309-046
Qty:  EA
Available Payment Methods

Product Details

Technics REQ0251-1 100W Subwoofer Plate Amplifier

Technics designed the REQ0251-1 100 watt subwoofer plate amplifier to provide power to their SB-AS500 dual 5-1/2" active subwoofer. A remote power panel is provided for locating the power switch on the front of your subwoofer cabinet. Auto-on circuitry provides power when you need it, and then goes into sleep mode when not in use for reduced power consumption.

A continuously variable 12 dB/octave low-pass filter is provided and can be adjusted from 50 to 200 Hz; the phase reverse switch to tailor the subwoofer to your room and other speakers. For connection to your home theater receiver, a single RCA input is provided.

Save up to 50% off the regular retail price through this Parts Express exclusive, factory buyout. Hurry, supplies are limited!

Specifications: • Power output: 100 watts RMS into 1Ω • Power requirements: 115 VAC, 60 Hz • Plate amplifier dimensions: Overall: 8-13/16" H x 8-1/16" W x 5-1/2" D, Cutout: 7-5/8" H x 6-15/16" W • Power panel dimensions: Overall: 3-1/8" H x 2-9/16" W x 3-1/2" D, Cutout: 1-7/8" H x 1-1/2" W.

Technics REQ0251-1 100W Subwoofer Plate Amplifier
  • BrandFactory Buyouts
  • ModelREQ0251-1
  • Part Number309-046
  • UPC848864012742
  • Product CategorySubwoofer Plate Amplifiers
  • Unit of MeasureEA
  • Product Rating
    (13 Reviews)
  • Weight4.1000 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Similar Products

View similar products to the Technics REQ0251-1 100W Subwoofer Plate Amplifier
in the Subwoofer Plate Amplifiers product category.


Technics REQ0251-1 100W Subwoofer Plate Amplifier
Technics REQ0251-1 100W Subwoofer Plate Amplifier is rated 4.3077 out of 5 by 13.
Rated 4 out of 5 by from Great amp for moneyI bought to make some speakers and these are able to power a 15in woofer.
Date published: 2014-08-10
Rated 4 out of 5 by from Works great for smaller SubsAcceptable performance for smaller subs at lower excursions. Provides good bass performance for most applications, but not really enough umph for a room-rattling home theater experience.Note that this unit is as deep as it is wide and the rear cover would be difficult to remove for clearance. I mounted in external enclosure.
Date published: 2014-07-04
Rated 4 out of 5 by from Great Price on Plate Amp.bought this plate amp as a backup for my M&K 50 watt 8" sub. The speaker is rated at 2 Ohms. Normal plate amps do not usually go below 4 Ohms.
Date published: 2014-06-09
Rated 5 out of 5 by from Good Amp, Accurate SpecificationI bought this amp last week and did a little testing to figure out what the power output will be at speaker impedances above 1 ohm. The output power was directly measured at 8 ohm (21 Wrms) and 4 ohm (41 Wrms) loads. The amp's open circuit voltage was measured to be 13.51 Vrms and the output impedance 0.243 ohms. From these values, one can calculate that the amp will deliver 73 Wrms at 2 ohms, and 118 Wrms at 1 ohm. These measurements were done with a simple sinewave signal using a well-characterized enclosed speaker as the load on a single amp. Over-all the published specification of 100 Wrms at 1 ohm appears to be not only accurate, but conservative (as it should be). Amp to amp variation is unknown.
Date published: 2014-05-16
Rated 5 out of 5 by from Great amp for a homebrew subwooferI bought this about 6 weeks ago. Had two 8" DVC drivers (4 ohm each coil, so 1 ohm in parallel) I was not using. Plus one of my old college 3-way speakers (original drivers shot). So I measured and cut out new openings for the drivers and this plate amp - a tight squeeze, but enough clearance to make it work. Very pleased with the result. < US$ 120 for my first DIY subwoofer. A coat of black paint to give it the professional look.
Date published: 2014-05-02
Rated 4 out of 5 by from Right amp for the jobI bought this amp to power a sub for my surround sound system. The amp was physically too large for the enclosure so I build a new one just for the amp. Great sound, a great addition to my home theater system. Also bought for this project: 2 - Sony 2-Way LCD TV Speaker Bar Module (for surround), Part # 299-685 & 2 - Philips 2-Way LCD TV Speaker Module(for center speaker), Part # 299-680.
Date published: 2014-04-04

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email  for a prompt reply.
Technics REQ0251-1 100W Subwoofer Plate Amplifier

hi will this amp work in NZ with 240v power Technics REQ0251-1 100W Subwoofer Plate Amplifier cheers

Asked by: latheman
Unfortunately this only accepts 120VAC input.
Answered by: MattP
Date published: 2014-08-20

Not a speaker geek, but if I understand this correctly I can wire four, 4-ohm subs in parallel (which is sorta the plan) and I get 100 watts. Right? 

Asked by: Chronic Iguana
Yes, four 4 ohm woofers in parallel will yield a 1 ohm load which will provide 100 watts from the amplifier.
Answered by: MattP
Date published: 2014-08-12

the 100 watt at 1ohm sub amp would be how many watts at 8 ohm. I'd like to use it with a Dayton dc160 speaker I already have on hand.

Asked by: Art54
This will power the woofer but will only produce about 10-12 watts into an 8 ohm load.
Answered by: MattP
Date published: 2014-08-12

With the large sealed component case, anybody know the volume displaced by this amp?

Asked by: Xett
A rough calculation of this amps displacement would be 0.15 cubic feet.
Answered by: MattP
Date published: 2014-08-12

I have a dayton sub800 where the amplified went out. Could I use this to replace the amplifier on the dayton audio 8" subwoofer? 

Asked by: acag
Since this amplifier is only rated for 100 watt output into 1 ohm, you would be much farther ahead using something like the Dayton SA70 or SA100 as a replacement.
Answered by: MattP
Date published: 2014-08-01

What's the difference between this amp and the REQ0207 for $10 more, other than $10 and slight dimensional differences?

Asked by: larft
These both require the same input voltage, produce the same output power and are virtually identical with the exception of the physical orientation. They were likely used for two different consumer models while they were in production, although we have no specific details regarding the difference in cost.
Answered by: MattP
Date published: 2014-08-20

Customer Projects

Customer projects that include: Technics REQ0251-1 100W Subwoofer Plate Amplifier

If you built a project using this product, post it in the Parts Express Project Gallery.

Customer Discussions

Discussions in our TechTalk Forum that include: Technics REQ0251-1 100W Subwoofer Plate Amplifier

If you would like to start a discussion about this product, post a thread in the TechTalk Customer Forum.
Get Deals
emailed to you every week.

Be the first to hear about new and exciting products,special pricing and incredible deals!

See This Week's "GET DEALS" Email
Parts Express
725 Pleasant Valley Dr.Springboro,OH45066USA

© 1996-2014 Parts Express, All Rights Reserved