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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 *
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

Product Preview
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 75 reviews
89%
(67)
8%
(6)
3%
(2)
0%
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0%
(0)
A
Angelo L.
Great Sound, Solid Amp – Just Wish aptX Worked

Using the RSL IA255.1 with my KEF Q150s and it sounds great, clear, punchy, and plenty of power. Build quality is solid too. Only downside is the Bluetooth; it claims to support aptX, but it only shows up as SBC on all my devices. Not a huge deal for me since I mostly use wired, but worth mentioning. Overall, really happy with it.

J
Jack W.F.
Amazing device!!

I was researching a while for a smaller 2 channel amp with a sub output. Most of what I was seeing was either overkill for what I needed or didn’t have the specs I wanted. After searching I found this product. Not only does it have technical specs I was looking for but it also comes with a very competitive price. There are literally no downsides to this product.

T
Thomas T.
Great little IA

The IA255.1 Works perfectly with my Mac for providing much superior sound quality using passive book shelf speakers and a powered subwoofer over ordinary computer speakers. It’s perfect for watching a quick movie, gaming, or streaming live music while managing my Lightroom workflow.

p
phillip p.
Excellent product

Fair price fast order fulfillment fast shipping. This is an excellent product and I am very satisfied with this purchase. I would definitely recommend RSL and we use them in the future.

M
Mark C.
Very impressive little amp

I have a number if these little class d amps. This one is outstanding - I love the controls and the quality of the sound. Very impressed.

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