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iA255.1 Ultra-Compact Integrated Amplifier

The iA255.1 takes an ultra-compact form factor to a new level of sound quality and feature-rich performance. As a 2.1 integrated amplifier with 55 watts per channel RMS, equipped with high-quality audiophile-grade components throughout a cleaner and more detailed high-fidelity listening experience fits in the palm of your hand. The small stature allows for use in a myriad of applications, from high-end desktop systems, or vinyl-listening sessions, to stepping up massively from your TV speakers/soundbar, or adding additional channels from your AVR's extra pre-outs. In all cases, the clean 55 watts per channel of power gives you plenty of juice to run your speakers at high volumes with exceptional clarity, sound staging, and dimension.

  • True 55 watts per channel (x 2)
  • Easy Hi-Fi 2.1 audio in any room
  • Line-in, Bluetooth, USB Audio
  • Selectable 90Hz high-pass filter
  • Stereo pre-out / subwoofer-out

Terms and conditions:

  • Free shipping within 48 states
  • 2 year warranty
  • $15 flat-rate return fee per iA255.1
$110each
Title
Free Shipping within the Continental US
* TAXES (GST) INCLUDED *
View Specifications
If you’re not thrilled with an RSL product within 30 days, return it hassle-free. Just contact us and we will email a return label with instructions. A return fee will apply to each Speedwoofer, wireless device, and amplifier / AV receiver included. (For International Returns are different, call us.) International returns are to be arranged and paid by the customer. RSL does not cover international return shipping, or shipping insurance.
All products ship for free to the contiguous 48 States. This includes all Speedwoofers, System Packages, A/V Receivers, Individual Speakers, and Accessories!
We’re ready to answer your questions, provide support, and even help you plan your home theater. Just give us a call at 800-905-5485 or email us at sales@rslspeakers.com.
Our average turnaround time is one business day. Orders received before 11AM Monday – Friday often ship same day!
Return any RSL speaker within 30 days in "like-new" condition, and receive your full money back. EXCLUDES SPEEDWOOFERS, iA255.1s, and WIRELESS TRANSMITTERS. *Items received with blemishes or without proper packaging may result in minor fees.
We offer highly discounted shipping rates to virtually anywhere outside of the contiguous US via premium air-freight shipping.

ULTRA-COMPACT INTEGRATED STEREO AMPLIFIER

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Features
Technical Analysis
Included: 1x ia255.1

FEATURES

  • True 55W per channel (55Wx2)
  • Easy Hi-Fi 2.1 audio in any room
  • Line-in, Bluetooth, USB audio
  • Selectable 90Hz high-pass filter
  • Stereo pre-out/ sub-out

CONTENTS

  • IA255.1 amplifier x 1
  • 24VDC/7A External Power Supply (5.4”x1.25”x2.4”) x 1
  • 3.5ft. USB-A to USB-C cable x 1
  • 1ft. 3.5mm Stereo to Female RCA cable adapter x 1
  • Micro Bluetooth Antenna x 1
iA255.1 Crosstalk - AP measurement
iA255.1 - Signal to noise AP measurement
iA255.1 - Frequency Response Full range and High-pass - AP measurement

Customer Reviews

Based on 42 reviews
88%
(37)
10%
(4)
2%
(1)
0%
(0)
0%
(0)
82.9
100.0
P
Paul B.
Great small amp.

Obvious choice for a small reference studio setup.

H
Hashim A.
Excellent product and service

Everything worked well.

C
ColoradoSnow
This class-d amp is the best deal in hifi today

I'm no qualified audiophile, but the clarity, spaciousness, and natural reproduction of music by the ia225 compared to the Aiyima A07 is stark. Kudos to the RSL team, especially for the price point!!

S
Sean
Great budget chip amp

If you are allergic to Class D, this one is still worth a try. I like the sound better than Aiyima AO7, SMSL SA300, Audioengine N22 (original version), and Micca OriGain.

S
Stephen M.
small and mighty...

Having upgraded some systems in other parts of the house, I had some nice speakers (a pair of passive speakers and a subwoofer) lacking a receiver/amp for my garage. Having seen positive reviews online, I ordered the IA255.1, which arrived promptly and was simple to set up. The Sub-Out on this was just what I needed and the result was a very good sounding system with plenty of volume for a sometimes-noisy space. I'm using a Wimm Pro as my source on this, which allows me to use it for streaming and its set as the default speaker for a Nest Mini already in the garage (the Wimm makes this all automatic, whether I'm using the Mini or casting from another device. Overall, a great product which surprised me with its sonic quality.

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SPECIFICATIONS

iA255.1 Ultra-Compact Integrated Amplifier
  • Power: 55 Watts RMS/Channel <1%THD @ 4ohm
  • Type: Proprietary audiophile pre-amp stage, Class D output using MA12070 IC by Infineon
  • S/N Ratio: 106dB
  • Channel Separation: 100dB
  • THD+N: <0.006 % 1000 Hz ~10W
  • Internal High-pass Filter: 12dB/octave @ 90Hz, by passable via rear toggle switch
  • Efficiency: >92% efficient
  • Input Sensitivity: 185mV
  • Input Impedance: 40k ohm
  • Inputs: Stereo RCA (Line level), USB Audio (Type-C), Bluetooth 5.0 (APTx)
  • Speaker Outputs: Gold-plated fully-insulated Clear banana jacks (chassis mounted)
  • Pre-Outs: 3.5mm Stereo full-range signal output (standard line level)
  • Bluetooth: Up to ~30ft. wireless range with detachable compact antenna
  • Reset: Recessed button to forget and unpair BT device
  • USB Audio: 16 bit, 48khz*(pending device interoperability)
  • Power Consumption: 30W TYP. 168W MAX
  • Bass: +-9dB @ ~100 Hz Varying shelf compensation
  • Treble: +-9dB @ ~5000 Hz Varying shelf compensation
  • Chassis: 6061 Extruded Aluminum Housing and CNC machined panels
  • Product Dimensions: 5.48″ x 1.46″ x 5″
  • Packaging Dimensions: 13″ x 3″ x 8″
  • Product Weight: 0.87lbs
  • Shipping Weight: 2.2lbs
  • Warranty: 2 years