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Jensen XDA91RB Mono Amplifier vs Pioneer GM-DX871 Mono Amplifier

Buy the Pioneer GM-DX871 for a cleaner, more reliable subwoofer amp: it is CTA-2006 compliant, has a 100 dB signal-to-noise ratio and gold-plated connectors, and owners trust Pioneer's mono amps to run cool and last. Buy the Jensen XDA91RB if you want app control and tuning built in: Bluetooth control, a 5-band EQ, adjustable bass boost and speaker-level input save you a separate DSP or line converter. The Jensen's 68 dBA signal-to-noise ratio is low for a modern Class D amp, so hiss is the likelier complaint; the Pioneer is the safer pick for sound quality, the Jensen for features.

  • Choose the Jensen XDA91RB if you want Bluetooth app control, a 5-band EQ and speaker-level input without adding a separate DSP.
  • Choose the Pioneer GM-DX871 if clean output and long-term reliability matter more than built-in tuning.

Prices

  • Jensen XDA91RB Mono Amplifier: $69.34 at eBay (last seen Nov 9)
  • Pioneer GM-DX871 Mono Amplifier: $189.00 at eBay (last seen Nov 9)
  • Difference: the Jensen XDA91RB Mono Amplifier is $119.66 cheaper than the Pioneer GM-DX871 Mono Amplifier at the latest prices (Nov 9)
Jensen
Jensen XDA91RB Class-D Mono Amplifier

Jensen XDA91RB Mono Amplifier

Jensen XDA91RB Class-D Mono Amplifier

4(251 ratings)
$69.34at eBayChecked Nov 9
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Pros
  • Bluetooth app control over gain, crossover, bass and illumination
  • 5-band EQ and 45 Hz bass boost built in
  • Speaker-level input works with factory head units
  • Runs at 1 ohm and 2 ohms for more output
Cons
  • 68 dBA signal-to-noise ratio is low for Class D
  • No CTA-2006 compliance stated
  • Needs the app to reach some settings
  • Lighter build than the Pioneer
Pioneer
Pioneer GM-DX871 Class D Mono Amplifier

Pioneer GM-DX871 Mono Amplifier

Pioneer GM-DX871 Class D Mono Amplifier

$189.00at eBayChecked Nov 9
See all prices and details
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Pros
  • 100 dB signal-to-noise ratio for a quiet noise floor
  • CTA-2006 compliant power ratings
  • Gold-plated connectors and aluminum top plate
  • Strong record for reliability among Pioneer mono amp owners
Cons
  • No Bluetooth or app control
  • No speaker-level input
  • RCA inputs only, so factory systems need a converter
  • Not rated below 4 ohms

What separates them

Jensen XDA91RB Mono AmplifierPioneer GM-DX871 Mono Amplifier
Power at 4 ohms240 W RMS x 1300 W RMS x 1
Power at 2 ohms400 W RMS x 1Not rated at 2 ohms
Signal-to-noise ratio68 dBA100 dB
Tuning controls5-band EQ, bass boost at 45 Hz, low-pass 32-350 Hz, Bluetooth appLow-pass crossover and bass boost, set on the chassis
InputsRCA and speaker-level (high level)RCA only
Preamp outputsRCA pass-throughRCA preamp outputs, line out
Build and connectors4 lb, standard terminals6 lb, aluminum top plate, gold-plated connectors
CertificationNot statedCTA-2006 compliant

Price history

$249.99$79.00
Nov 2Nov 9
  • Jensen XDA91RB Mono Amplifier: lowest $79.00 on Nov 9 at eBay.
  • Pioneer GM-DX871 Mono Amplifier: lowest $186.30 on Nov 9 at eBay.

Prices at every store

Jensen XDA91RB Mono Amplifier

  • WalmartNew

    In stock

    $95.84Free shippingChecked Nov 9
    Visit Walmart
  • eBayPre-owned

    Availability unknownSold by cyv26-51 (100% positive, 1 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $45.00+ $6.83 shippingChecked Nov 9
    Visit eBay
  • eBayNew

    Availability unknownSold by retail-dealz-llc (99.6% positive, 11,900 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $69.34Free shippingChecked Nov 9
    Visit eBay
  • WalmartRefurbished

    Out of stockSold by XLGAMES

    $69.99Free shippingChecked Nov 9
    Visit Walmart

Also available at

  • eBayCheck price at eBay
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All 2 stores and price history →

Pioneer GM-DX871 Mono Amplifier

  • eBayNew

    In stockShips from Malaysia · duties may apply

    $186.30Free shippingChecked Nov 9
    Visit eBay
  • Best BuyNew

    In stock

    $219.99Free shippingChecked Nov 9
    Visit Best Buy
  • CrutchfieldNew

    In stock

    $249.99Free shippingChecked Nov 9
    Visit Crutchfield
  • eBayNew

    Availability unknownSold by audiowattstore (99.2% positive, 101,100 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $189.00Free shippingChecked Nov 9
    Visit eBay

Also available at

  • WalmartCheck price at Walmart
  • eBayCheck price at eBay

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Specs compared

SpecJensen XDA91RB Mono AmplifierPioneer GM-DX871 Mono Amplifier
Signal to noise ratio68 dBA100 dB
Number Of Channels11
Amplifier ClassClass DClass D
BluetoothYes (App Control)No
Connection TypeSpeaker wire, RCARCA
Audio OutputsRCA Pass Through, Mono (Speaker Outputs)RCA Preamp Outputs
Output Channel Quantity11
Output TypesRCA Pass ThroughRCA
Depth5.59 in8.5 in
Height2.16 in2.4 in
Width9.56 in9.9 in
Weight4 lb6 lbs
Show all 40 specsShow fewer specs
SpecJensen XDA91RB Mono AmplifierPioneer GM-DX871 Mono Amplifier
RMS Power Rating240 Watts RMS x 1 channel @ 4 ohms300 W RMS x 1-Channel (4 Ohm)
Total Power Output1200 Watts (Total Dynamic Power)600 W x 1-Channel (4 Ohm)
Output Channels11
TypeClass DClass D
Design HighlightsRGB Custom Color IlluminationGold plated connectors, Aluminum top plate
colorBlack—
size2.16" x 9.56" x 5.59"—
RMS power at 4 ohms240 Watts RMS x 1 channel @ 4 ohms—
RMS power at 2 ohms400 Watts RMS x 1 channel @ 2 ohms

What reviewers say

Jensen XDA91RB Mono Amplifier

  • 4 / 5251 ratings

Owners rate it around 4 out of 5 and generally like the app tuning and the power for the size. Some complain about background noise and app reliability.

What people mention
  • App controlPraisedOwners like adjusting gain, crossover and EQ from their phone.
  • Noise floorCriticisedSome hear hiss at idle, consistent with the 68 dBA rating.
  • Power outputPraisedReviewers say it delivers solid bass for its size.
  • Bluetooth reliabilityMixedThe app connection works but can drop or lag for some users.

Pioneer GM-DX871 Mono Amplifier

Owners of the GM-DX871 generally describe it as a reliable, compact mono amp that delivers its rated power without drama. Most praise is for value and ease of install; complaints center on limited tuning features and the 4-ohm power figure.

What people mention
  • Power outputPraisedOwners say it pushes a sub hard at 2 ohms and holds up under long play.
  • SizePraisedThe compact chassis fits behind seats and in tight trunks.
  • HeatPraisedClass D operation keeps it cool in normal use.
  • TuningCriticisedBuyers want more crossover and EQ control than the basic controls offer.

Questions and answers

Which is better for a subwoofer on a factory radio?
The Jensen. It has speaker-level input, so it connects to factory speaker wiring without a line output converter. The Pioneer takes RCA only.
Which has the cleaner sound?
The Pioneer. Its 100 dB signal-to-noise ratio and CTA-2006 compliance point to a lower noise floor and honest ratings. The Jensen's 68 dBA figure is the weak spot in its spec sheet.
Which lasts longer?
Pioneer mono amps have the stronger reputation for long service, and the GM-DX871's aluminum top plate and gold-plated connectors help. The Jensen adds a Bluetooth module and app, which is one more thing that can fail.
Is the Jensen worth stepping up to over the Pioneer?
Only if you want built-in tuning. The Jensen's EQ, bass boost and app control replace a separate DSP. If you just need clean power for a sub, the Pioneer is the better fit.
Can the Pioneer run at 2 ohms?
It is rated at 4 ohms only, at 300 W RMS. The Jensen is rated down to 1 ohm at 600 W RMS, so it suits low-impedance subwoofers the Pioneer is not rated for.
Do either need a remote bass knob?
The Jensen controls bass through its app and does not list a wired knob. The Pioneer has no included remote level control either, so plan on setting gain at the amp.

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Buying guides that pick them

  • Best mono Class D amplifiers
All 14 stores and price history →
—
RMS power at 1 ohm600 Watts RMS x 1 channel @ 1 ohm—
Total dynamic power1200 Watts—
Dimensions2.16″ X 9.56″ X 5.59″ (HXWXD)—
Frequency response20 Hz ~ 250 Hz—
Low-pass crossover32 Hz – 350 Hz—
Bass boost45 Hz—
Gain adjustmentVariable 200 mV ~ 6 V—
Fuse size and type25A x 2—
Wi-FiNo—
Speaker OutputsMono—
Headphone JackNo—
Power Supply TypePWM MOSFET—
With Rechargeable BatteryNo—
Audio InputsLow Level (RCA), High Level (Speaker Wire)—
Total RMS Power—800 watts
Vehicle produced after 2005—Inside driver’s side door
Vehicle produced before 2005—Rear passenger doorjamb, glove box, center cons…
Bridgeable—No
THX Certified—CTA-2006 compliant